Option!T
Shammah Chancellor via Digitalmars-d
digitalmars-d at puremagic.com
Tue Jul 1 04:38:13 PDT 2014
On 2013-12-10 17:28:26 +0000, Andrei Alexandrescu said:
> I talked to a programmer who knows Scala (among others) and he
> mentioned the usefulness of the Option type - a zero or one element
> collection (range in D terminology). Here's an article discussing it:
> http://danielwestheide.com/blog/2012/12/19/the-neophytes-guide-to-scala-part-5-the-option-type.html
>
>
> 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". Should we follow Scala's example and add it?
>
>
> Andrei
Did anything ever come of this? If there's nothing in Phobos yet, I
can start working on it and submit a PR. If we can get this
formalized and into the good usage, it seems like we would not need a
.? operator.
-Shammah
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