tango list

[Christopher Wright]

Bill Baxter wrote:
> You can't put a template in an interface, just a particular 
> instantiation of one, as you've done there.  Try it with
> 
>        void notify(Result)(Seq!(Result) results);
> 
> I'm not sure if it's even possible to make that work.  It basically says 
> the interface contains a family of functions and you aren't sure which 
> ones yet.

It can be made to work, but not in D, at least not right now. You 
basically need a very wimpy template -- hereafter a 'generic' -- that 
doesn't do any compile-time reflection and doesn't call any templates 
(aside from generics). That would suffice for collections classes, 
except for requiring a hash function.

In that case, the generic is equivalent to Java's generics: it just 
saves you from boxing and unboxing.

I'm not sure how useful that is, though.