[swift-users] Is there any talk about overloading enum cases with associated values?

[Dennis Weissmann]

I would love to have that! Unfortunately, I didn’t find the time yet to think it through and write a proposal. I often use enums for modeling server calls in small apps and prototypes, something along the lines of

public enum Client {

  private static let baseURLComponent = URL(string: "")!

  case foo(bar: String)
  case foob(bar: String, foobar: String)

  private func constructURL() -> URL {
    ...
  }

  public func fetch<T: JSONInitializable>(completion: (@escaping(T?, Error?) -> ())) {
    URLSession.shared.dataTask(with: constructURL()) { data, response, error in
      ...
      if let data = data {
        completion(T.init(json: JSON(data: data)), error)
      } else {
        completion(nil, error)
      }
      ...
    }.resume()
  }

}

- Dennis

> On Nov 25, 2016, at 12:37 PM, Adrian Zubarev via swift-users <swift-users at swift.org> wrote:
> 
> I’m trying to find any talk on the evolution list about the overloading of enum cases with associated values. 
> 
> Has this already been discussed?
> Any technical reasons why we don’t have this already?
> Anyone else would want this feature?
> enum MyEnum {
>      
>     case a.     // <—\
>                 //   | should not be allowed!?
>     case a(Int) // <—/
>      
>     // What I want is this:
>     case javaScript(String)
>     case javaScript(String, scope: Document)  
>     // instead of `case scopedJavascript(String, scope: Document)`
> }
> Best regards,
> 
> 
> 
> 
> -- 
> Adrian Zubarev
> Sent with Airmail
> 
> _______________________________________________
> swift-users mailing list
> swift-users at swift.org <mailto:swift-users at swift.org>
> https://lists.swift.org/mailman/listinfo/swift-users <https://lists.swift.org/mailman/listinfo/swift-users>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-users/attachments/20161126/bf57d437/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 3585 bytes
Desc: not available
URL: <https://lists.swift.org/pipermail/swift-users/attachments/20161126/bf57d437/attachment.p7s>