[swift-evolution] Proposal: Enum 'count' functionality

Stephen Celis stephen.celis at gmail.com
Mon Dec 21 09:52:35 CST 2015

Does the naming "values" have precedence elsewhere? To me, "cases" is clearer, whereas "rawValues" would make sense if there was an additional, auto-generated static property for enumerations with underlying values.

    enum Section: Int { case SectionA, Section B }
    Section.cases // [.SectionA, .SectionB]
    Section.rawValues // [0, 1]

Because "rawValue" already exists, "values" makes things a bit more confusing: are they the cases themselves or are they their underlying values?


> On Dec 21, 2015, at 3:57 AM, Charles Constant via swift-evolution <swift-evolution at swift.org> wrote:
> If you change your proposal to focus on ".values" instead of ".values.count" (which you'd get for free, as you note) I would strongly support it. I don't need ".count" on its own, but ".values" ... well, I have a whole load of enums in my current projects with a ".values" I had to hardcode myself. I would love to get that for free.
> On Mon, Dec 21, 2015 at 12:46 AM, Brent Royal-Gordon via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> > I’ve put a proposal up on GitHub to add a cases ‘count’ functionality to Enums for the Swift language
> > https://gist.github.com/andyyhope/2fc5b6bee8ee1346f688 <https://gist.github.com/andyyhope/2fc5b6bee8ee1346f688>
> I think we'd be much better off having a list of all cases. That would make this feature useful for enums which don't have a raw type, or don't use Int as their raw type, or don't use sequential raw values for their cases.
> That approach has been discussed before, but not formally proposed.
> --
> Brent Royal-Gordon
> Architechies
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