Re: Question about enums
Re: Question about enums
- Subject: Re: Question about enums
- From: iseecolors <email@hidden>
- Date: Fri, 17 Jul 2015 14:04:25 -0700
As long as you only need one customer defined enum and it is not expected to persist, than this will work.
> On Jul 17, 2015, at 1:57 PM, Stephen J. Butler <email@hidden> wrote:
>
> Or what about this? Tested this time...
>
> enum Foo {
> case Bar
> case Etc
> case Etc_Etc
> case Custom(String)
>
> func asString() -> String {
> switch self {
> case .Bar: return "Bar"
> case .Etc: return "Etc"
> case .Etc_Etc: return "Etc Etc"
> case .Custom(let value): return value
> }
> }
>
> init(withString value: String) {
> switch value {
> case "Bar": self = .Bar
> case "Etc": self = .Etc
> case "Etc Etc": self = .Etc_Etc
> default:
> self = .Custom(value)
> }
>
> }
> }
>
> let a = Foo(withString: "Bar")
> let b = Foo(withString: "Something Else")
>
> print("a = \(a.asString()); b = \(b.asString())")
>
> I guess more typing, and some room for error in the initializer, but it
> does do away with the wrapper class.
>
> On Fri, Jul 17, 2015 at 3:39 PM, Quincey Morris <
> email@hidden> wrote:
>
>> On Jul 17, 2015, at 13:33 , Stephen J. Butler <email@hidden>
>> wrote:
>>
>>
>> How about using a Custom option with an associated String value?
>>
>> enum Foo:String {
>>
>> case Bar = “Bar"
>> case Etc = “Etc"
>> case Etc_Etc = “Etc Etc"
>> case Custom(String)
>> }
>>
>>
>> Unfortunately that won’t compile. One alternative is:
>>
>> enum Foo: String {
>> case Bar = "Bar"
>> case Etc = "Etc"
>> case Etc_Etc = "Etc Etc"
>> }
>>
>> enum FooPlus {
>> case AFoo (Foo)
>> case AString (String)
>>
>> var asString: String {
>> switch self
>> {
>> case let .AFoo (foo): return foo.rawValue
>> case let.AString (string): return string
>> }
>> }
>> }
>>
>>
>>
>>
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