notify

>>-notify(message)---------------------------------------------><

Requests notification about the completion of processing of the message [send] or [start]. The message object [message] is sent as the notification. You can use [notify] to request any number of notifications. After the notification message, you can use the [result] method to obtain any result from the messages [send] or [start].

Message class - notify method

/* Event-driven greetings */

.prompter~new~prompt(.nil)

::class prompter

::method prompt
  expose name
  use arg msg

  if msg \= .nil then do
    name = msg~result
    if name = "quit" then return
    say "Hello," name
  end

  say 'Enter your name ("quit" to quit):'

  /* Send the public default object .INPUT a LINEIN message asynchronously */
  msg=.message~new(.input,"LINEIN")~~start

  /* Sends self~prompt(msg) when data available   */
  msg~notify(.message~new(self,"PROMPT","I",msg))

  /* Don't leave until user has entered "quit"    */
  guard on when name="quit"