From: Daniel Mendler <mail@daniel-mendler.de>
To: Stefan Monnier <monnier@iro.umontreal.ca>,
Drew Adams <drew.adams@oracle.com>
Cc: "47992@debbugs.gnu.org" <47992@debbugs.gnu.org>,
"jakanakaevangeli@chiru.no" <jakanakaevangeli@chiru.no>
Subject: bug#47992: [External] : bug#47992: 27; 28; Phase out use of `equal` in `add-hook`, `remove-hook`
Date: Sun, 25 Apr 2021 00:38:25 +0200 [thread overview]
Message-ID: <090f8bd5-368c-5684-85e1-65420049d47a@daniel-mendler.de> (raw)
In-Reply-To: <jwva6pnz5gu.fsf-monnier+emacs@gnu.org>
On 4/25/21 12:30 AM, Stefan Monnier wrote:
>> Perhaps `equal' can be fixed to do something better with closures?
>
> There's no magic: `equal` has to check the structural equality, so it
> has to recurse through the whole structure, including all the
> closed-over variables to which it refers.
Well, structural equality on closures is an arbitrary choice. One could
simply refuse to compare closures structurally and treat them as opaque
objects. The structural equality does not even perform alpha conversion.
This is probably due to how binding works in Elisp?
(equal (lambda (x) x) (lambda (y) y))
Daniel
next prev parent reply other threads:[~2021-04-24 22:38 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 [this message]
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
[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
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