Can't Bridge This Return Type Yet Error

[sorin-ionescu]

In the code bellow, Nu does not like printSongInformation: (NSNotification) notification. However, if I change it to printSongInformation: (id) notification, it works fine. (puts (notification class)) prints __CFNotification. I am using version 2.0.1.

2012-01-07 01:45:29.119 nush[63156:d07] I can't bridge this return type yet: (NSNotification) ()
Nu uncaught exception: NSInvalidArgumentException: NSGetSizeAndAlignment(): unsupported type encoding spec '?' at '?' in '?'
  from ./iTunes.nu:8: in -
  from ./iTunes.nu:7: in class
  from /Library/Frameworks/Nu.framework/Resources/help.nu:136: in progn

#!/usr/bin/env nush

(load "Nu")
(load "Foundation")
(load "Cocoa")

(class ApplicationDelegate is NSObject
   (- (void) printSongInformation: (NSNotification) notification is
      (set information (notification userInfo))
      (puts "track information: #{(information description)}"))

   (- (void) applicationDidFinishLaunching: (id) sender is
      (set dnc (NSDistributedNotificationCenter defaultCenter))
      (dnc
          addObserver:self
          selector:"printSongInformation:"
          name:"com.apple.iTunes.playerInfo"
          object:nil)))

(set delegate ((ApplicationDelegate) alloc) init)
((NSApplication sharedApplication) setDelegate:delegate)
((NSApplication sharedApplication) run)