Hi all – I have ported over one of our applications from using itcl to using xotcl. I have a lot of code that already uses the itcl stuff, so the port must be backwards compatible. I have the following issue. Can anyone give me an idea how I can get around it? A script that shows my issue is as follows:

#!/usr/bin/tclsh
package req XOTcl
namespace import ::xotcl::*

::xotcl::Class Connect -parameter {
    {telnet}
    {ssh}
    {ip}
}
Connect instproc init {node args} {
    [self] instvar telnet
    [self] instvar ip
}

Connect dev node -ip "127.0.0.1" -telnet

The above does not work, as it seems that the –telnet arg must not be NULL, however, I need this to be NULL, as it is just a flag.

If I pass in:
Connect dev node -ip "127.0.0.1" -telnet “”

This works, however, this is not backwards compatible with how things were with itcl, and I have too many users/scripts to change how this is done.
There are potentially 2 ways around this, however, I am unable to find information on if either of them are possible:

1. Allow the passing in of a NULL argument
2. Prevent the constructor parsing args so that I can parse my own
   

I would appreciate any assistance

Cheers
Colin