Error when using Generic as property type in Swift

Question

I\'m having an issue when using a Generic as the type constraint on a property. Here is a very simple example:

import UIKit

class TSSignal

        

Answer 1

There is a workaround without type erasure (works as of Xcode6-Beta2):

import UIKit

class TSSignal {
    var _message: [MessageType] = []

    func getMessage() -> MessageType? {
        if _message.count > 0 {
            return _message[0]
        } else {
            return nil
        }
    }

    func setMessage(maybeMessage: MessageType?) {
        if let message = maybeMessage {
            _message = [message]
        } else {
            _message = []
        }
    }

    init() {
    }
}