user defined implicit casts

[Ender KaShae]

Tristam MacDonald Wrote:

> It would be nice if this could be generalised to functions, rather than just operator overloads. Then we could define member functions for specific template instantiations without having to specialise the whole template, or clog the body with static ifs.
> 
it actually suprised me that D doesn't allow specialised templates the way c++ does