Article View: comp.lang.clos
Article #244Re: Is CLOS Object-Oriented ???
From: Barry Margolin
Date: Sat, 24 Nov 1990 23:57
Date: Sat, 24 Nov 1990 23:57
25 lines
1519 bytes
1519 bytes
In article <27443D49.2BE8@wilbur.coyote.trw.com> scott@wiley.UUCP (Scott Simpson) writes:
>I thought they were the same too until someone at work came up with
>this problem in Flavors:
>
> (setf (send self (send button :slot-to-change)) value)
>
>What is happening is that (send button :slot-to-change) returns the
>name of a slot to change and that slot is changed to VALUE on the
>object SELF. How do you do this is CLOS?
Unfortunately, the above isn't valid Flavors code (at least as far as my
Symbolics machine is concerned). When I try to macroexpand it I get told
that SETF of SEND requires the message name to be a constant.
IMHO, the closest translation is:
(funcall (slot-change-function button) self value)
The SLOT-CHANGE-FUNCTION generic function would generally return a function
of the form #'(setf <slot-name>).
--
Barry Margolin, Thinking Machines Corp.
barmar@think.com
{uunet,harvard}!think!barmar
Technical Details
Message-ID:
<1990Nov24.235733.29577@Think.COM>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!think.com!barmarReferences:
<1990Nov15.101847.26285@diku.dk> <3904@s3.ireq.hydro.qc.ca> <27443D49.2BE8@wilbur.coyote.trw.com>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!zaphod.mps.ohio-state.edu!think.com!barmar From: barmar@think.com (Barry Margolin) Newsgroups: comp.lang.clos Subject: Re: Is CLOS Object-Oriented ??? Keywords: CLOS, dynamic binding, setf, Flavors Message-ID: <1990Nov24.235733.29577@Think.COM> Date: 24 Nov 90 23:57:33 GMT References: <1990Nov15.101847.26285@diku.dk> <3904@s3.ireq.hydro.qc.ca> <27443D49.2BE8@wilbur.coyote.trw.com> Sender: news@Think.COM Distribution: comp Organization: Thinking Machines Corporation, Cambridge MA, USA Lines: 25