[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Dynamically re-defining classes
- To: Nat Ballou <ballou@ERNEST.ACA.MCC.COM>
- Subject: Re: Dynamically re-defining classes
- From: firstname.lastname@example.org
- Date: Thu, 21 Sep 89 11:14:41 EDT
- Cc: email@example.com, CommonLoops.pa@Xerox.COM
- Full-name: Richard L. Piazza
- In-reply-to: Your message of Thu, 21 Sep 89 09:09:00 -0500. <19890921140945.2.BALLOU@LILITH.ACA.MCC.COM>
- Posted-date: Thu, 21 Sep 89 11:14:41 EDT
- Redistributed: commonloops.pa
>> To: CommonLoops.pa@Xerox.COM
>> Subject: Dynamically re-defining classes
>> Date: Wed, 6 Sep 89 10:35 CDT
>> From: rich@linus.MITRE.ORG
>> I know that there is probably some nifty CLOS functionality to do the
>> I want to define a class, and then later, without re-evaluating the
>> defclass form, I want to change the class, i.e., add another
>> slot. Is there any easy way to do this? I have thought of some
>> involved ways, but I want to stay within the CLOS protocol.
>Date: Tue, 19 Sep 89 17:47 CDT
>From: Nat Ballou <firstname.lastname@example.org>>
>Subject: RE: Dynamically re-defining classes
> Did you ever get a response to this message? I am interested in any
>solutions you received?
>Date: Thu, 21 Sep 89 09:09 CDT
>From: Nat Ballou <ballou@ERNEST.ACA.MCC.COM>
>Subject: Re: Dynamically re-defining classes
>If it's not too much code, would you mind telling how you did it in PCL?
I got side-tracked so I never actually coded it up. I think
the best way to do it is by using the function/method UPDATE-CLASS.
Also, you could define a new metaclass that would have the right
behavior, but that would be a lot more hairy....