NumericEnum.hpp

/*------------------------------------------------------------------------*/
/*      phdMesh : Parallel Heterogneous Dynamic unstructured Mesh         */
/*                Copyright (2007) Sandia Corporation                     */
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/*------------------------------------------------------------------------*/

#ifndef util_NumericEnum_hpp
#define util_NumericEnum_hpp

#include <complex>
#include <util/Basics.hpp>
#include <util/TypeList.hpp>

namespace phdmesh {

#ifndef DOXYGEN_COMPILE

typedef TypeList<          void ,
        TypeList< signed   char ,
        TypeList< unsigned char ,
        TypeList< signed   short ,
        TypeList< unsigned short ,
        TypeList< signed   int ,
        TypeList< unsigned int ,
        TypeList< signed   long ,
        TypeList< unsigned long ,
        TypeList<          float ,
        TypeList<          double ,
        TypeList<          std::complex<float> ,
        TypeList<          std::complex<double> ,

        TypeList<          void * ,
        TypeList< signed   char * ,
        TypeList< unsigned char * ,
        TypeList< signed   short * ,
        TypeList< unsigned short * ,
        TypeList< signed   int * ,
        TypeList< unsigned int * ,
        TypeList< signed   long * ,
        TypeList< unsigned long * ,
        TypeList<          float * ,
        TypeList<          double * ,
        TypeList<          std::complex<float> * ,
        TypeList<          std::complex<double> * ,

        TypeListEnd > > > > > > > > > > > > >
                    > > > > > > > > > > > > > NumericTypeList ;

#endif /* DOXYGEN_COMPILE */

template<typename Type = void> struct NumericEnum ;

template<>
struct NumericEnum<void> {

  enum { length  = TypeListLength<NumericTypeList>::value };
  enum { minimum = 1 };
  enum { maximum = length - 1 };

  static const char * name( unsigned ordinal );

  static unsigned     size( unsigned ordinal );

  enum { value = TypeListIndex< NumericTypeList , void>::value };

private:

  enum { OK = StaticAssert< TypeListUnique<NumericTypeList>::value >::OK };
};

template<typename Type>
struct NumericEnum {

  enum { value
#ifndef DOXYGEN_COMPILE
               = TypeListIndex<NumericTypeList,Type>::value
#endif
  };

private:
  enum { OK = StaticAssert<
         (0 < (int) value) &&
         ((int) value < (int) NumericEnum<void>::length) >::OK };
};

template<unsigned Ordinal>
struct NumericType {
#ifndef DOXYGEN_COMPILE
  typedef typename TypeListAt< NumericTypeList , Ordinal >::type type ;
#endif
private:
  enum { OK = StaticAssert< Ordinal < NumericEnum<>::length >::OK };
};

} // namespace phdmesh

#endif

---