How to get the name of enumeration value in Swift?

Question

If I have an enumeration with raw Integer values:

enum City: Int {
  case Melbourne = 1, Chelyabinsk, Bursa
}

let city = City.Melbourne
         


        

Answer 1

Introspection in Swift Enums seems to work partially.

I saw @drewag's response, and found that an Enum with no rawValues can indeed have introspection in Swift 5.X with Xcode 11.5. This code works.

public enum Domain: String {
    case network
    case data
    case service
    case sync
    var description: String {
        return "\(self)"     // THIS INTROSPECTION WORKS
    }
}
enum ErrorCode: Int, CustomStringConvertible {
    case success = 200
    case created = 201
    case accepted = 202
    case badRequest = 400
    case unauthorized = 401
    case forbidden = 403
    case notFound = 404
    var code: Int {
        return self.rawValue
    }
    var description: String {
        return "\(self)"      //THIS DOES NOT WORK - EXEC_BAD_ACCESS
    }
}
let errorCode = ErrorCode.notFound
let domain = Domain.network
print(domain.description, errorCode.code, errorCode.description)

Replace the "\(self)" for "string" in the second Enum and you will get this printout: network 404 string

NOTE: Using String(self) instead of "\(self)" in the first Enumwill require the Enum to conform to theLosslessStringConvertible` protocol, and also add other initializers, so a string interpolation seems to be a good workaround.

To Add a var description: String to the enum, you will have to use a Switch statement will all the enum cases as pointed before

var description: String {
    switch self {
    case .success: return "Success"
    case .created: return "Created"
    case .accepted: return "Accepted"
    }
}