How to display OptionSet values in human-readable form?

Question

Swift has the OptionSet type, which basically adds set operations to C-Style bit flags. Apple is using them pretty extensively in their frameworks. Examples include the options

Answer 1

struct MyOptionSet: OptionSet {
    let rawValue: UInt
    static let healthcare   = MyOptionSet(rawValue: 1 << 0)
    static let worldPeace   = MyOptionSet(rawValue: 1 << 1)
    static let fixClimate   = MyOptionSet(rawValue: 1 << 2)
    static let exploreSpace = MyOptionSet(rawValue: 1 << 3)
}

extension MyOptionSet: CustomStringConvertible {
    static var debugDescriptions: [(Self, String)] = [
        (.healthcare, "healthcare"),
        (.worldPeace, "world peace"),
        (.fixClimate, "fix the climate"),
        (.exploreSpace, "explore space")
    ]

    var description: String {
        let result: [String] = Self.debugDescriptions.filter { contains($0.0) }.map { $0.1 }
        return "MyOptionSet(rawValue: \(self.rawValue)) \(result)"
    }
}

Usage

var myOptionSet: MyOptionSet = []
myOptionSet.insert(.healthcare)
print("here is my options: \(myOptionSet)")