A very minimal wrapper round NSJSONSerialization.JSONObjectWithData returning a simple

NSJSONSerializationWrapper.swift

enum JSONParseResult {
    case Success(AnyObject)
    case Error(NSError)
}

/// Parses UTF-8 data to the appropriate object.
func parseJSON(data:NSData)->(JSONParseResult) {
    var err:NSError?
    let parsed:AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &err)
    if let err = err {
        return .Error(err)
    } else if let parsed:AnyObject = parsed {
        return .Success(parsed)
    }
    fatalError("Expected either a parse result or an error")
}