JSON.swift

typealias JSON = AnyObject
typealias JSONDictionary = Dictionary<String, AnyObject>
typealias JSONArray = Array<AnyObject>

func _JSONString(object: JSON)->String? {
      return object as? String
}

func _JSONInt(object: JSON)->Int? {
    return object as? Int
}

func _JSONObject(object: JSON)->JSONDictionary {
    return object as? JSONDictionary
}

func decodeJSON(data: NSData)->Result<JSON> {
    let jsonOptional: JSON! = try?NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions(rawValue:0))

    return resultFromOptional(jsonOptional, error: NSError())
}

func decodeObject<U: JSONDecodable>(json: JSON)->Result<U> {
    return resultFromOptional(U.decode(json), error:NSError())
}