A case for opImplicitCast: making string search work better

[Christopher Wright]

downs wrote:
> Consider this type:
> 
> struct StringPosition {
>   size_t pos;
>   void opImplicitCast(out size_t sz) {
>     sz = pos;
>   }
>   void opImplicitCast(out bool b) {
>     b = pos != -1;
>   }
> }
> 
> Wouldn't that effectively sidestep most problems people have with find returning -1?
> 
> Or am I missing something?
> 
> Of course, this would require a way to resolve ambiguities, i.e. functions/statements with preferences - for instance, if() would "prefer" bool over int. I don't know if this is possible.

Just use two functions: find and contains.