Class References

[John Colvin]

On Monday, 28 October 2013 at 11:22:03 UTC, Jeroen Bollen wrote:
> Is it possible in D to create an enum of class references?
> Something around the lines of:
>
> enum ClassReferences : Interface {
>     CLASS1 = &ClassOne,
>     CLASS2 = &ClassTwo
> }

Short answer: No

Long answer: the enum values must be compile-time constants, 
that's what enums are all about. Addresses and references are not 
compile-time constants.

What is the use case? There is probably a simple way of doing 
what you want. Why not:

interface Interface{}
class ClassOne : Interface {}
class ClassTwo : Interface {}

struct ClassReferences
{
     Interface classOne, classTwo;
}

void main()
{
     auto c1 = new ClassOne();
     auto c2 = new ClassTwo();

/* either this*/
     ClassReferences crs;
     crs.classOne = c1;
     crs.classtwo = c2;
/* or this */
     auto crs = ClassReferences(c1,c2);
}