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From: Ihor Radchenko <yantar92@posteo.net>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: emacs-devel@gnu.org
Subject: Re: Is it valid to call isearch-filter-predicate outside isearch?
Date: Sat, 17 Jun 2023 13:05:52 +0000	[thread overview]
Message-ID: <87ttv69r2n.fsf@localhost> (raw)
In-Reply-To: <87leh02iqx.fsf@web.de>

Michael Heerdegen <michael_heerdegen@web.de> writes:

>> May you please elaborate? I am not sure what `kill-variable' calls you
>> are referring to here.
>
> To those in `wdired-change-to-dired-mode:
>
> #+begin_src emacs-lisp
>   (when wdired-search-replace-filenames
>     (remove-function (local 'isearch-search-fun-function)
>                      #'dired-isearch-search-filenames)
>     (kill-local-variable 'replace-search-function)
>     (kill-local-variable 'replace-re-search-function)
>     ;; Restore dired hook
>     (add-hook 'isearch-mode-hook #'dired-isearch-filenames-setup nil t))
> #+end_src
>
> This demonstrates a problem when not using an advice: to get rid of the
> temporary new binding you simply kill the local variable, but this can
> be problematic, especially when we did not create it (but maybe someone
> third).

The code above is indeed slightly problematic.
I'd store the old value somewhere in such situations and restore later.

May `define-advice' be modified to work on variable values? That way,
one can override the variable value and later restore the old one using
the existing machinery.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>



  reply	other threads:[~2023-06-17 13:05 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-20 14:10 Is it valid to call isearch-filter-predicate outside isearch? Ihor Radchenko
2023-05-22 18:12 ` Juri Linkov
2023-05-31 10:08   ` Ihor Radchenko
2023-05-31 12:44     ` Eli Zaretskii
2023-05-31 12:56       ` Ihor Radchenko
2023-05-31 14:21         ` Eli Zaretskii
2023-05-31 14:38           ` Ihor Radchenko
2023-05-31 15:22             ` [External] : " Drew Adams
2023-06-01  8:10               ` Ihor Radchenko
2023-05-31 23:10             ` Michael Heerdegen
2023-06-01 11:48               ` Ihor Radchenko
2023-06-01 23:30                 ` Michael Heerdegen
2023-06-02  8:58                   ` Ihor Radchenko
2023-06-01  6:38     ` Juri Linkov
2023-06-01 11:44       ` Ihor Radchenko
2023-05-31 23:17 ` Michael Heerdegen
2023-06-01  5:55   ` Eli Zaretskii
2023-06-01 23:13     ` Michael Heerdegen
2023-06-01  0:40 ` Michael Heerdegen
2023-06-01 11:42   ` Ihor Radchenko
2023-06-01 16:21     ` Juri Linkov
2023-06-02  8:56       ` Ihor Radchenko
2023-06-01 23:22     ` Michael Heerdegen
2023-06-02  9:07       ` Ihor Radchenko
2023-06-02 13:36         ` [External] : " Drew Adams
2023-06-02 23:06         ` Michael Heerdegen
2023-06-03  8:35           ` Ihor Radchenko
2023-06-04  0:06             ` Michael Heerdegen
2023-06-17 13:05               ` Ihor Radchenko [this message]
2023-06-18  2:48                 ` Michael Heerdegen
2023-06-18 11:31                   ` Ihor Radchenko
2023-06-04  2:06             ` Michael Heerdegen
2023-06-18 10:31           ` Ihor Radchenko
2023-06-18 21:39             ` Michael Heerdegen
2023-06-19 10:44               ` Ihor Radchenko

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