Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!celia!larry
From: larry@celia.UUCP (Larry Weinberg)
Newsgroups: comp.sys.mac.programmer
Subject: ThinkC TCL's DoCommand() wish
Keywords: think C TCL CBureaucrat DoCommand Object
Message-ID: <1042@celia.UUCP>
Date: 5 Jun 91 04:40:17 GMT
Distribution: usa
Organization: Rhythm & Hues, Inc., Hollywood
Lines: 34




    I have been using Think C's class libraries for some time now and
I keep running into the situation where I wish  I could send some
parameters, or a pointer, along with the command code to the DoCommand()
method  of CBureacrat class objects.  

    Why insn't it implemented as:

    CBureaucrat::DoCommand(long theCommand,  long  data)

    (data could be a pointer to any type of structure that might be
     needed)

    Am I alone with this wish?   Since I don't have this feature, and I
don't want to modify the TCL sources because I want to remain compatible,
I create special methods for subclasses that I call directly, hence
I must cast explicitly to a given subclass therefore loosing some of that
beautiful object oriented generality of not having to know what type of
object I am passing a message on to.
   
    Am I missing something obvious?  Is there some truer message passing 
scheme implemented in the Class Library's  chain of command?
Or should I take the plunge and modify the CBureaucrat class and have problems
with future versions?

Larry

-- 
Larry Weinberg                 Rhythm & Hues, Inc.
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