Enums with Inline Subclass

[mark_mcs]

I spend most of my time in java land but try to sneak in some D 
code whenever possible. One pattern that comes in handy is to use 
Java enums as states in a finite state machine (good for XML 
parsers). Given that D supports enums with custom base types, I 
was curious to see if this pattern would translate.

The code looks like this:


interface A
{
     void process();
}

enum Test : A
{
     Value1 = new class A {
         override void process() { writeln("Value1"); }
     },
     Value2 = new class A {
         override void process() { writeln("Value2"); }
     }
}

void main()
{
     Test.Value1.process();
}


It's syntactically valid but you get linker errors. Seems the 
compiler doesn't generate the vtable for the inline classes:

undefined reference to `_D3app4Test12__anonclass16__vtblZ'
undefined reference to `_D3app4Test12__anonclass17__ClassZ

My question is: should this be possible? Is this a grammar bug or 
a codegen bug?