Is there a way to see if .init has been set by the user?

[Dicebot]

On Saturday, 21 September 2013 at 13:30:19 UTC, simendsjo wrote:
> I'm though of using if for aggregates, yes. But this doesn't 
> handle the case where you set the same value is T.init.

I don't think those two case are any different from the type 
system point of view, manual or default.