GNU bug report logs - #14303
24.3; Bug in comment-search-backward

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Package: emacs;

Reported by: Leo Liu <sdl.web <at> gmail.com>

Date: Mon, 29 Apr 2013 13:29:02 UTC

Severity: normal

Found in version 24.3

Done: Leo Liu <sdl.web <at> gmail.com>

Bug is archived. No further changes may be made.

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From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
To: 14303 <at> debbugs.gnu.org
Cc: Leo <sdl.web <at> gmail.com>, Stefan Monnier <monnier <at> IRO.UMontreal.CA>
Subject: bug#14303: 24.3; Bug in comment-search-backward
Date: Fri, 17 May 2013 16:27:12 +0200

Am 17.05.2013 15:37, schrieb Leo Liu:
> On 2013-05-17 21:28 +0800, Stefan Monnier wrote:
>> I don't understand when that can happen (when inside a string (nth
>> 8 ppss) is also non-nil).
>
> I have
>
> (defvar octave-comment-start-skip "\\(^\\|\\S<\\)\\(?:%!\\|\\s<+\\)\\s-*"
>    "Octave-specific `comment-start-skip' (which see).")
>
> and this could find "#abc" as comment start where BEG is outside of
> strings and comments but END is in a string.
>
> Maybe this is due to setting octave-comment-start-skip incorrectly.
>
> I looked at comment-normalize-vars and see it uses:
>
>    \\(\\(^\\|[^\\\n]\\)\\(\\\\\\\\\\)*\\)
>
> as anchor but I don't understand fully.
>
> Leo
>
>
>
>

BTW what is the fastest way moving backward --searching comment-- when not inside a comment?

Thought at

(forward-line -1)
(end-of-line)
ppss-Check-for-Comment-again

maybe re-search-backward is as fast?

Andreas
This bug report was last modified 12 years and 7 days ago.

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