quick protocol for creating dictionaries from types

DictionaryEncoder.swift

// simple alternative to using swift 4's encodable protocol when you just need to quickly create a dictionary
// usage: 
// struct SomeData: DictionaryEncodable {
//    enum Key: String {
//        case someValue
//    }
//
//    let someValue = 5
//    
//    func encode(_ encoder: DictionaryEncoder) {
//         encoder.encode(someValue, key: Key.someValue)
//    }
// }
// let encoder = DictionaryEncoder()
// let dict = encoder.encode(someEncodableType)


class DictionaryEncoder {
    var result: [String: Any]

    init() {
        result = [:]
    }

    func encode(_ encodable: DictionaryEncodable) -> [String: Any] {
        encodable.encode(self)
        return result
    }

    func encode<T, K>(_ value: T, key: K) where K: RawRepresentable, K.RawValue == String {
        result[key.rawValue] = value
    }
}

protocol DictionaryEncodable {
    func encode(_ encoder: DictionaryEncoder)
}