From: Gregory Heytings <gregory@heytings.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Undo defalias
Date: Fri, 03 Mar 2023 16:01:17 +0000 [thread overview]
Message-ID: <7c6ec4cae3d516e8a406@heytings.org> (raw)
In-Reply-To: <jwvbkl9j0vp.fsf-monnier+emacs@gnu.org>
>
> The POC you posted works only if `message` was redefined in some
> particular way, such as when a loading a file that has
>
> (defalias 'message #'ignore)
>
> but then it wouldn't be the result of a bug but of deliberate harm :-)
>
My understanding is that this is what the OP did, and he wanted to "undo"
what he did. With a Lisp function you can always open the source file
again and C-M-x, but with a C function that's not possible.
>
> AFAIK most cases where `message` can end up aliased to `ignore` is when
> you have code doing
>
> (cl-letf (((symbol-function 'message) #'ignore))
> ...)
>
> In that case, the previous value won't be found in `function-history`.
> As for why is the `ignore` rebinding is still active...
>
But in that case the meaning of message is restored when the cl-letf is
left, no? Am I missing something?
next prev parent reply other threads:[~2023-03-03 16:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-28 1:23 Undo defalias Óscar Fuentes
2023-02-28 9:17 ` Gregory Heytings
2023-02-28 15:56 ` Óscar Fuentes
2023-03-01 20:36 ` Emanuel Berg
2023-03-03 15:29 ` Stefan Monnier via Users list for the GNU Emacs text editor
2023-03-03 15:37 ` Gregory Heytings
2023-03-03 15:49 ` Stefan Monnier via Users list for the GNU Emacs text editor
2023-03-03 15:52 ` Eli Zaretskii
2023-03-03 16:01 ` Gregory Heytings [this message]
2023-03-03 16:00 ` Óscar Fuentes
2023-03-03 16:17 ` Gregory Heytings
2023-03-03 16:33 ` Stefan Monnier via Users list for the GNU Emacs text editor
2023-03-03 21:11 ` Óscar Fuentes
2023-03-05 9:32 ` Madhu
2023-03-03 22:58 ` Gregory Heytings
2023-03-04 0:05 ` Stefan Monnier
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