GNU bug report logs - #19203
visible-bell not acting like a special variable?

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Package: emacs;

Reported by: Mario Valencia <mariovalspi <at> gmail.com>

Date: Thu, 27 Nov 2014 11:51:01 UTC

Severity: minor

Tags: notabug

Done: Glenn Morris <rgm <at> gnu.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#19203; Package emacs. (Thu, 27 Nov 2014 11:51:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Mario Valencia <mariovalspi <at> gmail.com>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Thu, 27 Nov 2014 11:51:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Mario Valencia <mariovalspi <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: visible-bell not acting like a special variable?
Date: Thu, 27 Nov 2014 05:50:00 -0600

[Message part 1 (text/plain, inline)]
(setq visible-bell t) ; no bell
(let ((visible-bell nil)) ; but ring bell for this one
  (next-line)) ; when at end of buffer, C-x C-e should ring the bell. it
doesn't.

why doesn't this work?

[Message part 2 (text/html, inline)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#19203; Package emacs. (Fri, 28 Nov 2014 18:39:03 GMT) Full text and rfc822 format available.

Message #8 received at 19203 <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Mario Valencia <mariovalspi <at> gmail.com>, 19203 <at> debbugs.gnu.org
Subject: Re: bug#19203: visible-bell not acting like a special variable?
Date: Fri, 28 Nov 2014 19:38:28 +0100

> (setq visible-bell t) ; no bell
> (let ((visible-bell nil)) ; but ring bell for this one
>    (next-line)) ; when at end of buffer, C-x C-e should ring the bell. it
> doesn't.
>
> why doesn't this work?

Because the bell doesn't ring within the scope of the `let'.  Try


(setq visible-bell t)

(defun set-visible-bell ()
  (setq visible-bell t))

(defun ding-ding ()
  (add-hook 'post-command-hook 'set-visible-bell)
  (setq visible-bell nil)
  (ding))

(ding-ding)


instead.

martin
Added tag(s) notabug. Request was from Glenn Morris <rgm <at> gnu.org> to control <at> debbugs.gnu.org. (Sun, 30 Nov 2014 19:58:02 GMT) Full text and rfc822 format available.
bug closed, send any further explanations to 19203 <at> debbugs.gnu.org and Mario Valencia <mariovalspi <at> gmail.com> Request was from Glenn Morris <rgm <at> gnu.org> to control <at> debbugs.gnu.org. (Sun, 30 Nov 2014 19:58:02 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Mon, 29 Dec 2014 12:24:03 GMT) Full text and rfc822 format available.
This bug report was last modified 10 years and 177 days ago.

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