implicit construction operator

[ketmar]

WebFreak001 wrote:

> Now before you would have only been able to do this:
>
> ---
> Nullable!Foo a;
> foo(a, Nullable!int(5));
> ---
>
> but now you should also be able to do:
>
> ---
> Nullable!Foo x = null;
> Nullable!Foo y = 5;
>
> foo(null, 5);

please no. such unobvious type conversions goes out of control really fast. 
there is a reason why D doesn't have such thing, this is not an oversight, 
but a design decision.