[tcljava-dev] [Fwd: CallFrame and interp.newCallFrame() questions.]

[Neil M. <ne...@cs...>]

Hmm... lost my permission to post this, but hopefully it should make it
through this time.

-------- Original Message --------
Subject: CallFrame and interp.newCallFrame() questions.
Date: Tue, 20 Nov 2001 21:45:36 +0000
From: Neil Madden <ne...@cs...>
Organization: University of Nottingham (Computer Science Undergrad)
To: tcl...@li...

Looking through the source code for Jacl, I notice that the CallFrame
class starts with the message "This class can be overridden to provide
new variable scoping rules for the Tcl interpreter.". Similarly, the
Interp.newCallFrame() method has the message "This method can be
overridden to provide debugging support". Who are these comments meant
for? The CallFrame class has package-only access, and
Interp.newCallFrame() is protected, so you could only subclass them (and
override their behaviour) if your class is in the tcl.lang package. So,
is this functionality for overriding the default behaviour meant only
for people building their own private Jacl distro, or is there some
other way to register your own CallFrame class with Jacl? I ask because
I am playing around with writing a simple OO extension for Jacl (with
some neat features though), and it would be useful for me to define a
new CallFrame for use with methods on my objects. I don't want to put
any of my classes in the tcl.lang package, as that would just be messy.
Anyone know?

Neil