[swift-evolution] Language enhancement: Nest enum declaration into protocol declaration

[Karl Wagner]

Proposal is being worked on.   https://github.com/apple/swift-evolution/pull/552
  

  
- Karl
  
    
  
  
  

  
  
  
  

  
  
>   
> On Nov 21, 2016 at 1:33 pm,  <Jakub Bednář via swift-evolution (mailto:swift-evolution at swift.org)>  wrote:
>   
>   
>   
>  Hi fellow Swifters,  
>
> I have just started using the language and was trying to declare an enum inside a protocol.  
>
> protocol WorkingEngine {  
>  enum States {  
>  Idle  
>  Pending  
>  Working  
>  Finished  
>  Canceled  
>  }  
>
>  var state: States { get }  
> }  
>
> The compiler refused this and I had to take the enum outside of the protocol:  
>
> enum WorkingEngineStates {  
>  Idle  
>  Pending  
>  Working  
>  Finished  
>  Canceled  
>  }  
>
> protocol WorkingEngine {  
>  var state: WorkingEngineStates { get }  
> }  
>
> This does not seem coherent with the rest of the language, as enums can be nested in classes, structs and even enums, but not to protocols.  
> I haven’t found any proposal for this change. Is this the correct place to request it or get some opinion on the idea?  
>
> Thanks a lot,  
>
> Jakub  
>
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