generic_property.swift

struct Property<T> {
    let name: String
}

extension Property {
    static var someBool: Property<Bool> { return Property<Bool>(name: "bool") }
    static var someString: Property<String> { return Property<String>(name: "lol") }
}

struct Foo {
    static func valueFor<T>(_ prop: Property<T>) -> T {
        switch prop.name {
            case "bool": return true as! T
            case "lol": return "hi" as! T
            default: fatalError()
        }
    }
}

let s = Foo.valueFor(.someString)
let b = Foo.valueFor(.someBool)