> On Aug 5, 2015, at 16:38 , Charles Srstka <[email protected]> wrote:
>
> On Aug 5, 2015, at 6:22 PM, Rick Mann <[email protected]> wrote:
>>
>> I'd like to be able to write code like this:
>>
>> enum MyNotifications : String {
>> case Note1 = "note1"
>> case Note2 = "note2"
>> }
>>
>> let nc = NSNotificationCenter.defaultCenter()
>> nc.postNotificationName(MyNotifications.Note1, nil)
>>
>> But Swift (2.0) doesn't let me do that. Is it possible to write an extension
>> method to NSNotificationCenter that accepts "any enum derived from String"
>> (or that's convertible to String, or something like that)? e.g.:
>>
>> func postNotification(inName : enum:String)
>>
>> I tried doing this: http://pastebin.com/kXLEHu8f
>>
>> But it gets multiple errors, as you can see.
>>
>> Is there an elegant way to do this? Seems counter-intuitive that I can't
>> pass a derived enum in place of an ancestral type.
>
> AFAIK there’s no way to do exactly what you’re asking for, but you could put
> a post() method on the enum itself.
Well, that kinda works, for a single enum, but I can't derive an enum from that
because I run into this when I subclass an enum.
playground28.swift:26:16: error: raw type 'Notes' is not convertible from any
literal
enum MyNotes : Notes
^
playground28.swift:26:6: error: type 'MyNotes' does not conform to protocol
'RawRepresentable'
enum MyNotes : Notes
^
Swift.RawRepresentable:11:13: note: protocol requires nested type 'RawValue'
typealias RawValue
--
Rick Mann
[email protected]
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