opEquals does not work?

[w0rp]

On Friday, 7 June 2013 at 20:51:13 UTC, Namespace wrote:
> I got it. I must use Object instead of A... How ridiculous. I 
> thought this was already fixed...

The class opEquals is quite like .equals in Java. You need to 
match the signature of Object, which is implicitly the base class 
of all classes. I think I recommend something like this.

override bool opEquals(Object o) const {
     auto other = cast(A) o;

     // It's probably easy to miss out !is null here, which 
matters.
     return other !is null && this.id == other.id;
}