On 12/10/13 9:40 AM, JR wrote: > On Tuesday, 10 December 2013 at 17:28:26 UTC, Andrei Alexandrescu wrote: >> We have only(x) (http://dlang.org/phobos/std_range.html#.only) to be a >> collection of exactly one value, but not a type for "a value of type T >> or nothing at all". > > Is this not what Nullable!T is? Nullable is not a range. Andrei