unsigned policy (implicit conversions for complex?)

[Walter Bright]

Andrei Alexandrescu (See Website For Email) wrote:
> So the way things should be is: all meaning-preserving integral 
> promotions should be kept; then, all implicit integral->floating point 
> promotions should be severed; then, all implicit floating point->complex 
>  should go.
> 
> Right?

Yes. Also disallow implicit conversion of Object to void*.