https://issues.dlang.org/show_bug.cgi?id=17440
--- Comment #10 from hst...@quickfur.ath.cx --- P.S. Actually, Nullable does have another overload that takes a null value to be used in lieu of a boolean flag. So conceivably, you could use Nullable!(T, null) instead of Nullable!T and you will have the requisite semantics. --
