Promotion.h

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#ifndef __PROMOTION_H__
#define __PROMOTION_H__

#include "libBaseTypes.h"

template<class T1, class T2>
class PromotionOf
{
public:
};

template<class T>
class PromotionOf<T, T>
{
public:
  typedef T type;
};

#define DEFINE_SYMMETRICPROMOTION(T1,T2,TPromo)                                                      \
    template<> class PromotionOf<T1,T2>{public: typedef TPromo type;    }; \
    template<> class PromotionOf<T2,T1>{public: typedef TPromo type;    }; 

#define PROMOTION(T1,T2) typename PromotionOf<T1,T2>::type

//DEFINE_SYMMETRICPROMOTION(byte, Real, Real);
//DEFINE_SYMMETRICPROMOTION(int, Real, Real);
DEFINE_SYMMETRICPROMOTION(byte, int, int)
;

DEFINE_SYMMETRICPROMOTION(byte, float, float)
;
DEFINE_SYMMETRICPROMOTION(byte, double, double)
;
DEFINE_SYMMETRICPROMOTION(short, float, float)
;
DEFINE_SYMMETRICPROMOTION(short, double, double)
;
DEFINE_SYMMETRICPROMOTION(int, float, float)
;
DEFINE_SYMMETRICPROMOTION(int, double, double)
;
DEFINE_SYMMETRICPROMOTION(float, double, double)
;

template<class T>
class RangePromotionOf
{
public:
  typedef T type;
};

#define DEFINE_RANGEPROMOTION(T,TPromo)                                                             \
    template<> class RangePromotionOf<T>{public:    typedef TPromo type;    }; 

#define RANGEPROMOTION(T) typename RangePromotionOf<T>::type

DEFINE_RANGEPROMOTION(byte,int)
;

#endif //#ifndef __PROMOTION_H__