Associated enums with Cereal

gistfile1.txt

enum Job {
    case Mechanic(String)
    case Carpenter(String)
}

extension Job: CerealType {
    private struct Keys {
        static let job = "job"
        static let name = "name"
    }

    init(decoder: CerealDecoder) throws {
        guard let jobType: Int = try decoder.decode(Keys.job), name: String = try decoder.decode(Keys.name) else {
            throw CerealError.InvalidEncoding
        }
        switch jobType {
        case 1: self = .Mechanic(name)
        case 2: self = .Carpenter(name)
        default: throw CerealError.InvalidEncoding
        }
    }

    func encodeWithCereal(inout encoder: CerealEncoder) throws {
        switch self {
        case .Mechanic(let mechanic):
            try encoder.encode(1, forKey: Keys.job)
            try encoder.encode(mechanic, forKey: Keys.name)
        case .Carpenter(let carpenter):
            try encoder.encode(2, forKey: Keys.job)
            try encoder.encode(carpenter, forKey: Keys.name)
        }
    }
}