Struct polymorphism?

[Era Scarecrow]

On Monday, 8 October 2012 at 15:23:58 UTC, Era Scarecrow wrote:
> Error: function expected before (), not 
> 'this.polyBase.opDispatch!("orig")'

   I think this is a compiler bug. It complains about calling 
opDispatch, however it doesn't complain if you explicitly call 
'this'. Should adding 'this' be required? I am using the 
-property switch so it's a little more strict, but that doesn't 
seem to change the results. I can't just start adding 'this' to 
all my function as outside normal functions/variables won't ever 
be seen.

struct S {
   Something polyBase;
   alias polyBase this;  //opDispatch

   string callsOrig() {
     return orig;        //works but misleading
     return orig();      //breaks
     return orig(1);     //breaks too
     return this.orig(); //works
   }
}

struct Something {
   auto ref opDispatch(string fun, Args ...)(auto ref Args args) 
@property;
}

   My experiments concentrating on this part rather than with 
arguments, those will come later when this works.