How do you use a switch statement with a nested enum?

Question

I've created an enum for Instagram endpoints with nested enums similar to Moya.

enum Instagram {     enum Media {         case Popular         case Shortcode(id: String)         case Search(lat: Float, lng: Float, distance: Int)     }     enum Users {         case User(id: String)         case Feed         case Recent(id: String)     } } 

I would like to return the path for each endpoint.

extension Instagram: TargetType {     var path: String {         switch self {         case .Media.Shortcode(let id):             return "/media/shortcode"         }     } } 

However I'm getting an error on the switch statement above for the path.

Enum case Shortcode is not a member of type Instagram

How to fix?

Advanced Practical Enums

Answer 1

I'm adding a more general answer for a few reasons.

1. This is the only open question regarding nested enums and switch statements. The other one is sadly closed.
2. The only legit answer does not show how to assign the value of a nested enum to a symbol. The syntax was not intuitive to me.
3. None of the other answers have extensive case examples.
4. An enum nested 3 levels deep is more illustrative of the required syntax. Using efremidze answer still took me a while to work it out.

 enum Action {     case fighter(F)     case weapon(W)      enum F {         case attack(A)         case defend(D)         case hurt(H)          enum A {             case fail             case success         }         enum D {             case fail             case success         }         enum H {             case none             case some         }     }     enum W {         case swing         case back     } }  // Matches "3 deep" let action = Action.fighter(.attack(.fail)) // Matches "1 deep" because more general case listed first. let action2 = Action.weapon(.swing)  switch action { case .fighter(.attack(.fail)):     print("3 deep") case .weapon:     print("1 deep") case .weapon(.swing):     print("2 deep to case") case .fighter(.attack):     print("2 deep to another enum level") default:     print("WTF enum") } 

Answer 2

By adding an associated value for the nested enum you can access it using a switch statement.

enum Instagram {     enum MediaEndpoint {         case Search(lat: Float, lng: Float, distance: Int)     }     case Media(MediaEndpoint) }  extension Instagram: TargetType {     var path: String {         switch self {         case .Media(.Search):             return "/media/search"         }     } }  // Demo  protocol TargetType {     var path: String { get } }  class MoyaProvider<Target: TargetType> {     func request(_ target: Target, completion: @escaping () -> ()) {} }  let provider = MoyaProvider<Instagram>() provider.request(.Media(.Search(lat: 0, lng: 0, distance: 0))) {}