From: Richard M Stallman <rms@gnu.org>
To: Clinton Ebadi <clinton@unknownlamer.org>
Cc: d@domob.eu, guile-devel@gnu.org, emacs-devel@gnu.org
Subject: Re: GSoC: Emacs Lisp support for GNU Guile
Date: Sat, 04 Apr 2009 18:00:08 -0400 [thread overview]
Message-ID: <E1LqDuK-0000wH-9F@fencepost.gnu.org> (raw)
In-Reply-To: <87skktqvwg.fsf@unknownlamer.org> (message from Clinton Ebadi on Tue, 31 Mar 2009 16:28:47 -0400)
- Remove handling of NIL in Scheme. This special casing is, in my
opinion, distressingly unclean. This would require adding a new
ELISP-IF form that accepts #f/nil as false values
We carefully designed ways to handle nil, #f and () in Guile
so as to be able to intermix Lisp and Scheme programs.
That was 14 years ago, and I don't recall what we decided. But I think
the idea was that #f and () would be eq when viewed
from Lisp, but not eq when viewed from Scheme.
I don't know whether this design was actually implemented.
We should not make changes in this based on a rigid idea that
something is "unclean". To make the two languages interoperate
properly on the same data requires careful design, and it's
possible that something less than totally elegant is the only
way to make it work at all.
next prev parent reply other threads:[~2009-04-04 22:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-31 19:44 GSoC: Emacs Lisp support for GNU Guile Daniel Kraft
2009-03-31 20:28 ` Clinton Ebadi
2009-03-31 22:34 ` Neil Jerram
2009-03-31 23:10 ` Andy Wingo
2009-04-04 22:00 ` Richard M Stallman [this message]
2009-03-31 22:23 ` Neil Jerram
2009-03-31 23:15 ` Andy Wingo
2009-04-01 2:30 ` Mike Gran
2009-03-31 23:05 ` Andy Wingo
2009-03-31 23:41 ` Neil Jerram
2009-04-01 15:36 ` Daniel Kraft
2009-04-01 13:31 ` Stefan Monnier
2009-04-03 17:30 ` Andy Wingo
2009-04-03 20:31 ` Chong Yidong
2009-04-03 23:50 ` Andy Wingo
2009-04-06 23:26 ` Samuel Bronson
2009-04-07 0:52 ` Stefan Monnier
2009-04-05 10:11 ` Ludovic Courtès
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