Enums in Swift

Kind.swift

public enum Kind:Int,CustomStringConvertible {
    
    case weapon
    case armor
    case scroll
    case wand
    case potion
    case ring

    public var description:String {
        switch self {
        case .weapon: return "weapon"
        case .armor: return "armor"
        case .scroll: return "scroll"
        case .wand: return "wand"
        case .potion: return "potion"
        case .ring: return "ring"
        }
    }
    
    private static var _count:Int {
        get {
            var max:Int = 0
            while let _ = Kind(rawValue: max) {
                max += 1
            }
            return max
        }
    }
    
    static func oneAtRandom() -> Kind {
        return Kind(rawValue: Int(arc4random_uniform(UInt32(_count))))!
    }
}