Fwd: [Openmcl-devel] How to make lisp slots in an objc class

Anders Conradi beque at telia.com
Wed Mar 17 01:46:03 PST 2004

I meant to send this to the list, but used the wrong button

Begin forwarded message:

> From: Anders Conradi <beque at telia.com>
> Date: tis mar 16, 2004  23:58:03 Europe/Stockholm
> To: Randall Beer <beer at eecs.cwru.edu>
> Subject: Re: [Openmcl-devel] How to make lisp slots in an objc class
> On tisdag, mar 16, 2004, at 15:02 Europe/Stockholm, Randall Beer wrote:
>>> Thanks! That gets the class past the compiler. When I try to 
>>> initialize it it only works when I pass initargs to make-instance 
>>> (even though I have added initforms). How can I instantiate  objects 
>>> without passing initargs? I really want the object to be 
>>> instantiated from a .nib-file.
>> The fix for initializing Lisp slots in OBJC-CLASSes from :INITFORM is 
>> in CVS and the OBJC-CLOS.LISP file is attached.
> Thank you! It seems as if I should start following CVS instead of 
> relying on version 14.1-p1 that I have now (slightly hacked with 
> generous bug-fixes from this list).
> Just one more question. (Yeah, right, like all pieces will fall into 
> place if I only get the answer to this question)
> Now I have conditions that are signaled on one side of cocoa and 
> caught on the other. The problem is that I loose valuable state. I 
> only get messages about "#<BOGUS object @ #x42AFE7AE> has no slots" 
> and a backtrace that originates from CHECK-NS-EXCEPTION. I would like 
> to get the backtrace on the side of cocoa that signaled the error.
>  Is there any good way of entering the debugger instead of returning 
> to cocoa when a method implemented in lisp signals a condition? I 
> haven't gotten around to learning the lisp condition model so I am not 
> quite sure how to approach this.
> OK, I just realised that I have one more question. Is there anything I 
> can do to help? I know my lisp "skills" are severally lacking, and I 
> don't have that much time, but perhaps there is something simple I 
> could do. I have already written a simple temperature converter in 
> lisp with a cocoa interface. That might be nice as an example for 
> other newbies to this whole lisp and cocoa thing.
>> Randy
>> <objc-clos.lisp>

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