[antlr-interest] Setting return values

[kevin_mitchell at agilent.com]

I've been trying to port my grammar from V2 to V3, which I'm beginning to regret... :-(  I use a lot of arguments and values in my grammar, and I'm beginning to wonder whether I've misunderstood how V3 is supposed to work, because at first glance my grammar is becoming a lot more cumbersome than the V2 version.  Here's a concrete example.  In V2 I might have written something like

declaration returns [Declaration d] :
  d=valueDeclaration
| d=simpleTypeDeclaration
| d=genericTypeDeclaration
;

But in V3 it looks like I now have to write something like

declaration returns [Declaration d] 
@after { $d = dec; }
: dec=valueDeclaration
| dec=simpleTypeDeclaration
| dec=genericTypeDeclaration
;

I.e. I have to use an auxiliary name, dec in this case, and then assign to $d at the end.  Is this correct, or have I misunderstood something?  

Thanks,  Kevin