OptionSetType and enums

Question

I have an enum named ProgrammingLanguage:

enum ProgrammingLanguage {
  case Swift, Haskell, Scala
}

Now I have a class named <

Answer 1

I guess you could simply achieve it in the modern way {^_^}.

protocol Option: RawRepresentable, Hashable, CaseIterable {}

extension Set where Element: Option {
    var rawValue: Int {
        var rawValue = 0
        for (index, element) in Element.allCases.enumerated() where contains(element) {
            rawValue |= (1 << index)
        }
        return rawValue
    }
}

... then

enum ProgrammingLanguage: String, Option {
    case Swift, Haskell, Scala
}
typealias ProgrammingLanguages = Set

let programmingLanguages: ProgrammingLanguages = [.Swift, .Haskell]

Reference: https://nshipster.com/optionset/