Area.h

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/* Copyright (C) 2002 - 2006, 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 _Area_h
#define _Area_h

#include "Quantity/Variable.h"
#include "Quantity/Constant.h"
#include "Quantity/QuantityCluster.h"

#include "PhysicalQuantities/Length.h"

namespace quantity {
  namespace area {

/* Area dimension */
typedef BSUtilities::Rational<2> LE;
typedef BSUtilities::Rational<0> M;
typedef BSUtilities::Rational<0> TI;
typedef BSUtilities::Rational<0> E;
typedef BSUtilities::Rational<0> TE;
typedef BSUtilities::Rational<0> A;
typedef BSUtilities::Rational<0> LU;

typedef dimension::Dimension<LE, M, TI, E, TE, A, LU> Dimension;

class Unit;

/* declaration of Area units */
class BarnUnit;
class AcreUnit;
class AreUnit;
class HectareUnit;

/* the SquareMetre and prefixed SquareMetres */

typedef LOKI_TYPELIST_3(length::Metre, length::CentiMetre, 
                                        length::MilliMetre) LengthList;

typedef unit::ComposeElement<Unit, LengthList, 
                               BSUtilities::Rational<2> > LengthElement;
typedef LOKI_TYPELIST_1(LengthElement) AreaCompositeList;

typedef unit::ComposeBase<Unit, AreaCompositeList> SquareMetreUnits;

typedef 
  unit::Composed<SquareMetreUnits, LOKI_TYPELIST_1(length::Metre)> 
                                                            SquareMetre;

typedef
  unit::Composed<SquareMetreUnits, LOKI_TYPELIST_1(length::CentiMetre)>
                                                       SquareCentiMetre;

typedef unit::Composed<SquareMetreUnits, 
                  LOKI_TYPELIST_1(length::MilliMetre)> SquareMilliMetre;

/* the Barn */

typedef unit::NonPrefixable<Unit, BarnUnit> Barn;

/* the Acre */

typedef unit::NonPrefixable<Unit, AcreUnit> Acre;

/* the Are */

typedef unit::NonPrefixable<Unit, AreUnit> Are;

/* the Hectare */

typedef unit::NonPrefixable<Unit, HectareUnit> Hectare;

typedef
  LOKI_TYPELIST_7(SquareMetre, SquareCentiMetre, SquareMilliMetre, Barn,
                                              Acre, Are, Hectare) Units;

/* Area quantity */

typedef Quantity<Dimension, Unit, Units, SquareMetre> Quantity;

  }

typedef Variable<area::Quantity> Area;
typedef Constant<area::Quantity> AreaConstant;

typedef VariableVector<area::Quantity> AreaVector;

}

#endif /* _Area_h */

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