Compare Enum with the associated Short Syntax value

Question

I'm trying to simplify

var isReachable = {
    switch status {
    case .reachable: return true
    default: return false
    }
}()

to something like

var isReachable = (case status == .reachable)

Here is a complete example:

enum NetworkReachabilityStatus {
    case unknown
    case notReachable
    case reachable(Alamofire.NetworkReachabilityManager.ConnectionType)
}

NetworkReachabilityManager().listener = { status in
    var isReachable = {
        switch status {
        case .reachable: return true
        default: return false
        }
    }()
}

This is only a problem when dealing with enumerations with related values. Any suggestions?

Answer 1

Extending to NetworkReachabilityStatus can do the job.

extension NetworkReachabilityStatus {
    var isReachable: Bool {
        switch self {
            case .reachable(_): return true
            default: return false
        }
    }
}

NetworkReachabilityManager().listener = { status in
    var isReachable = status.isReachable
}

Answer 2

(Since your complete example does nothing). If your motivation for this question is that you want to perform some operation only when the listener is called “reachable” (similar to the termination that is called with success: Bool), you can write:

NetworkReachabilityManager().listener = { status in
    if case .reachable(_) = status {
       // perform some operation
    }
}

- - ? - kkoltzau, :

NetworkReachabilityManager().listener = { status in
    if status.isReachable {
       // perform some operation
    }
}