Re: Preprocessor magic to expand template instantiation ?

Hi there,

  I am looking for a trick to avoid maintaining the 'Create' function
as describe below. All it does is a simple template instantiation, are
there any trick which would avoid having to maintain this 'Create' as
the number of enum grows ?

Thanks

typedef enum {
  TYPE1,
  TYPE2
} TYPES;

class type {};
class type1 : public type {};
class type2 : public type {};

template <int T> struct Factory;
template <> struct Factory<TYPE1> { typedef type1 Type; };
template <> struct Factory<TYPE2> { typedef type2 Type; };

type* Create(TYPES e)
{
  switch(e)
    {
  case TYPE1:
    return new Factory<TYPE1>::Type;
    break;
  case TYPE2:
    return new Factory<TYPE2>::Type;
    break;
    }
}