GNU bug report logs - #40671
[DOC] modify literal objects

Previous Next

Package: emacs;

Reported by: Kevin Vigouroux <ke.vigouroux <at> laposte.net>

Date: Thu, 16 Apr 2020 20:40:02 UTC

Severity: normal

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

Full log

Message #321 received at 40671 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Paul Eggert <eggert <at> cs.ucla.edu>, Drew Adams <drew.adams <at> oracle.com>
Cc: Michael Heerdegen <michael_heerdegen <at> web.de>,
 Mattias Engdegård <mattiase <at> acm.org>, 40671 <at> debbugs.gnu.org,
 Richard Stallman <rms <at> gnu.org>, ke.vigouroux <at> laposte.net
Subject: Re: bug#40671: [DOC] modify literal objects
Date: Fri, 1 May 2020 06:13:53 +0300

On 29.04.2020 04:38, Paul Eggert wrote:
> On 4/28/20 5:55 PM, Drew Adams wrote:
>> You're_not_  using the language that's used for Common Lisp.
> In what sense does the language differ? Here's a quote from CLtL2 (page 115):
> 
> "it is an error to destructively modify any object that appears as a constant
> in executable code, whether within a 'quote' special form or as
> a self-evaluating form."

As Drew pointed out (and if I understood this correctly), the above 
specification leads to implementations that do raise an error when 
someone tried to modify such a value.
This bug report was last modified 5 years and 3 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.