Access properties via subscripting in Swift

Question

I have a custom class in Swift and I\'d like to use subscripting to access its properties, is this possible?

What I want is something like this:

clas         


        

Answer 1

I suppose you could do:

class User {
    let properties = Dictionary()

    subscript(key: String) -> String? {
        return properties[key]
    }

    init(name: String, title: String) {
        properties["name"] = name
        properties["title"] = title
    }
}

Without knowing your use case I would strongly advise against doing this.

Another approach:

class User {
    var name : String
    var title : String

    subscript(key: String) -> String? {
        switch key {
            case "name" : return name
            case "title" : return title
            default : return nil
        }
    }

    init(name: String, title: String) {
        self.name = name
        self.title = title
    }
}

It might be worth noting that Swift doesn't appear to currently support reflection by names. The reflect function returns a Mirror whose subscript is Int based, not String based.