From: Olivier Certner <olce.emacs@certner.fr>
To: larsi@gnus.org, 47992@debbugs.gnu.org
Cc: mail@daniel-mendler.de, monnier@iro.umontreal.ca,
jakanakaevangeli@chiru.no
Subject: bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`
Date: Tue, 06 Jul 2021 16:44:56 +0200 [thread overview]
Message-ID: <2012643.zr9gB0fHWZ@ravel> (raw)
In-Reply-To: <8b715c19-e6bf-90a8-75a2-3ae3e1ace563@daniel-mendler.de>
Hi,
> > either. People do `M-x eval-buffer' their .emacs files, and since we're
> > using `equal' here, this happens to work -- almost by accident.
>
> I understand. This argument is pretty similar to Drew's argument, but
> realistic. The problem is that people expect idempotence when evaluating
> their ".emacs". This property breaks as soon as we require `eq` and if
> we want to retain this behavior we have no alternative than keeping the
> current behavior.
I agree with all this. We should aim for idempotence, as much as practical.
Just wanted to add that there is really no other simple general way out than
naming lambdas (by whichever mechanism this is done) and matching on names.
Indeed, even with `equal', and no changes in some lambda's code, idempotence
is not guaranteed: Just use in the code some macro that calls `gensym'. Each
evaluation of `lambda' will then raise different functions by `equal', since
their code differs.
--
Olivier Certner
next prev parent reply other threads:[~2021-07-06 14:44 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-24 12:11 bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook` Daniel Mendler
2021-04-24 20:12 ` bug#47992: [External] : " Drew Adams
2021-04-24 20:23 ` Daniel Mendler
2021-04-24 21:20 ` Drew Adams
2021-04-24 21:34 ` Daniel Mendler
2021-04-24 22:30 ` Stefan Monnier
2021-04-24 22:38 ` Daniel Mendler
2021-04-24 23:04 ` Stefan Monnier
2021-04-24 23:38 ` Daniel Mendler
2021-04-25 1:16 ` Drew Adams
2021-04-25 3:08 ` Stefan Monnier
2021-04-25 4:57 ` Drew Adams
2021-04-25 13:52 ` Stefan Monnier
2021-04-25 1:16 ` Drew Adams
2021-04-25 1:23 ` Drew Adams
2021-04-25 3:10 ` Stefan Monnier
2021-04-25 4:57 ` Drew Adams
2021-04-25 10:33 ` Daniel Mendler
2021-04-25 13:56 ` Stefan Monnier
2021-05-02 9:09 ` Lars Ingebrigtsen
2021-05-02 10:37 ` Daniel Mendler
2021-05-03 8:50 ` Lars Ingebrigtsen
2021-07-06 14:44 ` Olivier Certner [this message]
[not found] ` <877di6udfy.fsf@web.de>
2021-07-04 1:09 ` Lars Ingebrigtsen
2021-07-04 2:35 ` Michael Heerdegen
2021-07-04 2:56 ` Lars Ingebrigtsen
2021-07-04 4:28 ` Michael Heerdegen
2021-07-04 13:36 ` Lars Ingebrigtsen
2021-07-04 17:08 ` bug#47992: [External] : " Drew Adams
2021-07-04 22:45 ` Michael Heerdegen
2021-07-05 12:39 ` Lars Ingebrigtsen
2021-07-06 1:48 ` Richard Stallman
2021-07-06 2:37 ` bug#47992: [External] : " Drew Adams
2021-07-06 3:21 ` Michael Heerdegen
2021-07-07 23:57 ` Richard Stallman
2021-07-06 9:46 ` Arthur Miller
2021-07-07 23:57 ` Richard Stallman
2021-07-08 2:11 ` Arthur Miller
2021-07-04 23:15 ` Michael Heerdegen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2012643.zr9gB0fHWZ@ravel \
--to=olce.emacs@certner.fr \
--cc=47992@debbugs.gnu.org \
--cc=jakanakaevangeli@chiru.no \
--cc=larsi@gnus.org \
--cc=mail@daniel-mendler.de \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).