[swift-evolution] List of all Enum values (for simple enums)

[Jacob Bandes-Storch]

Do you have any recommendations for where in the compiler this would
happen, for those of us without thorough knowledge of all parts? What would
the team need to see in a proposal for it to be sufficiently complete?
On Tue, Dec 8, 2015 at 10:05 PM Chris Lattner <clattner at apple.com> wrote:

>
> > On Dec 8, 2015, at 9:53 PM, Jacob Bandes-Storch via swift-evolution <
> swift-evolution at swift.org> wrote:
> >
> > Enums are often used without associated values:
> >
> >     enum Attribute { case Title, Date }
> >     enum Style { case Dark, Light }
> >
> > In such cases, it's very useful to be able to iterate over all possible
> values. But you have to do it manually:
> >
> >     extension Attribute {
> >         static var allValues: [Attribute] {
> >             return [.Title, .Date]  // imagine this x100, and not
> autogenerated :(
> >         }
> >     }
> >
> > It would be nice if the compiler generated this for us. It doesn't have
> to be an Array, but any kind of SequenceType. Maybe something like
> "StaticCollection". Of course, this doesn't work in the general case, but I
> think simple enums are common enough that it might be worth doing.
>
> This is a commonly requested feature, and tons of people would support the
> ability to do this somehow.  Similarly, for integer-backed enums, many
> people want to be able to know the “max” enum rawValue so they can index
> into them.
>
> -Chris
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20151209/5149f667/attachment.html>