Get the all values for enum

enum-all-values.swift

extension RawRepresentable {

    static var allValues: [Self] {
        var index = 0
        let iterator: AnyIterator<Self> = AnyIterator {
            let current = withUnsafePointer(to: &index) { unsafePointer in
                unsafePointer.withMemoryRebound(to: Self.self, capacity: 1) { unsafePointer in
                    unsafePointer.pointee
                }
            }
            index += 1
            return current
        }
        return Array(iterator)
    }
}

enum Test: String {
    case one
    case two
}

print(Test.allValues)