[Issue 9636] null initialization for std.typecons.Nullable

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9636



--- Comment #3 from bearophile_hugs at eml.cc 2013-08-20 13:01:04 PDT ---
(In reply to comment #2)

> Arguably, you won't see that very often, but it is plausible for someone to
> want to be able to have a nullable pointer, whose "non-null" value can itself
> be null.

Hopefully I'll not see such code :-)


> As a workaround, Nullable-specific "null-token" could work? EG: something along
> the lines of:
> 
> EG:
> enum Nullable {Null}
> 
> void foo(Nullable!(immutable int[4]) items = Nullable.Null)
> {}

This seems acceptable.

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