What's the correct opEquals signature for structs?

[Jesse Phillips]

On Tuesday, 13 March 2012 at 18:28:27 UTC, Johannes Pfau wrote:
> My std.uuid module doesn't compile with the latest dmd. I guess 
> it's
> because of a wrong opEquals signature, this is what I have now:
>
> ----------
> @safe pure nothrow bool opEquals(ref const UUID s) const
> {
>     return s.data == this.data;
> }
> ----------

I think Alex is right, does auto ref work for parameters?

@safe pure nothrow equals_t opEquals(auto ref const UUID s) const