Access a struct property by its name as a string in Swift

Question

Let\'s say I have the following struct in Swift:

struct Data {
   let old: Double
   let new: Double
}

Now I have a c

Answer 1

What about this "reflection-less" solution?

struct Data {
    let old: Double
    let new: Double

    func valueByPropertyName(name:String) -> Double {
        switch name {
        case "old": return old
        case "new": return new
        default: fatalError("Wrong property name")
        }
    }
}

Now you can do this

let data = Data(old: 0, new: 1)

data.valueByPropertyName("old") // 0
data.valueByPropertyName("new") // 1