The only thing it disallows is making !x return something other than a bool.  
The only place I can think of that would be useful is some sort of logic type 
that has more than 2 states, but that's a stretch.

The current implementation looks good to me, I was just curious about it.

-Steve



----- Original Message ----
> From: Andrei Alexandrescu <[email protected]>
> 
> Walter and I agreed that cast to bool is as good as opUnary. Overloading 
> unary "!" is now not possible.
> 
> Andrei


      
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