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From: Jan Atle Ramsli <trollet@skynet.be>
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Subject: Re: Now I start again
Date: Tue, 16 Apr 2002 15:09:42 +0200
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Alf-Ivar Holm wrote:
>
> Prolog!  I don't even remember its purpose!?
Hehe :-)
It has two essential goals: ! and fail ...
>         f: @file;
>         listBoxFile: @f;
> 
> where f is already an instantiated version of file and (f) can not be
> subpatterned.  If you make f into a pattern by removing the "@" your
> code should work, me thinks.

Absolutely!
Tp make this crystal clear for posterity and possible newbies listening
in:

I tried to create and instance of an instance, which is total nonsense,
like saying


Atle is a man.
Alf is an Atle who knows Beta /* this is obvious nonsense! */

The second should either be 

Atle is a man
Alf is a man who knows beta or /* sublass directly */

a Betaman is a man who knows beta /* do it the way encouraged by Beta */
Alf is a Betaman 


What I tried to do was the last of these, create an intermediate layer.

Atle