Multiple alias this is coming.

[IgorStepanov via Digitalmars-d-announce]

On Friday, 19 September 2014 at 11:25:03 UTC, Nordlöw wrote:
> On Thursday, 18 September 2014 at 22:13:14 UTC, IgorStepanov 
> wrote:
>> Is Nullable!(T) with polymorphic type disallowed now?
>
> Sorry, I meant
>
>     NotNull(T)
>
> Here's a module
>
> https://github.com/nordlow/justd/blob/master/notnull.d
>
> a bit tweak from the original design by Adam D Ruppe.

What does a troubles with your NotNull implementation you have 
with old alias this?
Do you want to implicit cast from NotNull!(T) to all other 
NotNull!(B) where B is basetype of T?