[plt-scheme] references to deleted objects

From: Paul Steckler (steck at ccs.neu.edu)
Date: Thu Nov 7 15:04:59 EST 2002

> 2.5) Add a "deleted" field and replace send with a send that checks
>    deleted before actually sending the message.

This solution sounds like the most obvious to me.  When you send an
oval% instance the `delete' message, you're updating its state somehow.
So why not use that state information when processing other messages
sent to it?

-- Paul

Posted on the users mailing list.