Simplifying NSJSONSerialization in Swift

main.swift

import Foundation

/** Outputs of the JSONObjectWithData function. */
enum JSONObjectWithDataResult
{
    case Success(AnyObject)
    case Failure(NSError)
}

/** 
Attempts to convert the specified NSData to JSON objects
and returns either the root JSON object or an error.
*/
func JSONObjectWithData(
    data:    NSData,
    options: NSJSONReadingOptions = nil)
    -> JSONObjectWithDataResult
{
    var error: NSError?
    let json: AnyObject? = 
      NSJSONSerialization.JSONObjectWithData(
        data,
        options: options,
        error:  &error)
    return json != nil
        ? .Success(json!)
        : .Failure(error ?? NSError())
}

//
// Example usage
//
func readSomeJSON()
{
    // Get JSON data somewhere…
    let data = NSData()
    switch JSONObjectWithData(data)
    {
        case .Success(let json):  println("json:  \(json)")
        case .Failure(let error): println("error: \(error)")
    }
}