Swift enum loses initialized values when set as a property?

Question

I\'ve found a work-around, but this problem is vexing me and I thought I\'d share in case anyone else is having the same problem. Would love to know why this is happening.

Answer 1

Property foo is not MyEnum, but ImplicitlyUnwrappedOptional<MyEnum> aka MyEnum!. Unlike many other cases, switch does not implicitly unwrap it.

You have to unwrap it manually:

    if let foo = foo {
        switch foo {
        case .ABC: println("ABC foo")
        case .DEF: println("DEF foo")
        case .GHI: println("GHI foo")
        default: println("no foo")
        }
    }
    else {
        println("nil foo")
    }

OR force unwrap with ! if you are sure foo is not nil, :

    switch foo! {
    case .ABC: println("ABC foo")
    case .DEF: println("DEF foo")
    case .GHI: println("GHI foo")
    default: println("no foo")
    }

OR match with ImplicitlyUnwrappedOptional<Enum> as is:

    switch foo {
    case .Some(.ABC): println("ABC foo")
    case .Some(.DEF): println("DEF foo")
    case .Some(.GHI): println("GHI foo")
    default: println("no foo")
    }