Nullable or Optional? Or something else?

[Leandro Lucarella]

Andrei Alexandrescu, el  2 de septiembre a las 14:39 me escribiste:
> I plan to add a Nullable struct to Phobos (akin to C#'s Nullable, Boost's Optional).
> 
> Apparently a good design is to define Optional!T with a minimum of member functions (ideally none) and have it use the "alias this" feature to masquerade as a 
> T. That way Optional!T looks and feels much like a T, except that it supports a function
> 
> bool isNull(T)(Optional!T value);
> 
> Am I on the right track? If so, what is the name you'd prefer for this artifact?

Maybe this is a very silly question, but what is exactly the difference
between Optional!T o/isNull(o) and T* o/o is null?

-- 
Leandro Lucarella (luca) | Blog colectivo: http://www.mazziblog.com.ar/blog/
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