NetNews Usenet Archive 1993 #3/NN_1993_3.iso/spool/comp/lang/objectiv/725

Text File | 1993-01-23 | 1.5 KB | 33 lines

Newsgroups: comp.lang.objective-c
Path: sparky!uunet!gatech!enterpoop.mit.edu!news.media.mit.edu!wave
From: [e-mail] (Michael B. Johnson)
Subject: why no class variables?
Message-ID: <[e-mail]>
Sender: [e-mail] (USENET News System)
Organization: MIT Media Laboratory
Date: Fri, 22 Jan 1993 13:38:37 GMT
Lines: 22

Hi folks.  For a project I've been doing for some time now, I need to keep
some state info in the Class of a given object.  I'm annoyed by the fact
that I can't add instance variables to a Class object, and have to "simulate"
them with static variables.  Off the top of my head, I don't understand this
restriction.  Can someone out there convince me that this is a necessary
and proper restriction?

For those who care, the situation for where I need them is that I have a set
of classes which, at run-time, start up companion processes on other machines.
The machines that could run a given class are queried when the class is
+initialize'ed, and then when an instance of that class is requested, that
list is queried to find the best host at that time to run the new instance
on.  I need to keep this list of possibleHosts somewhere, and it seems
appropriate to make it a class instance variable, but as far as I can tell,
there's now way in ObjC to do this.  Pleae correct me if I'm wrong...


--

-->  Michael B. Johnson
-->  MIT Media Lab      --  Computer Graphics & Animation Group
-->  [phone]     --  [e-mail]