From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: David Kastrup <dak@gnu.org>
Cc: 20307@debbugs.gnu.org
Subject: bug#20307: 25.0.50; (regexp-opt nil ...) returns ""
Date: Sun, 12 Apr 2015 08:09:14 -0400 [thread overview]
Message-ID: <jwvegnpczyu.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <876191vfou.fsf@fencepost.gnu.org> (David Kastrup's message of "Sun, 12 Apr 2015 11:50:09 +0200")
> So something like "[b-a]" and "\([b-a]\)" or
> "[^[:unibyte:][:multibyte:]]" or something similarly contorted.
I can't remember which regexp I used last time I needed one like that,
but something like "\\`\\'a" has the advantage of being efficient (the
\` anchor at the start is detected by Emacs and prevents looking for
a match over the whole searched area).
Stefan
next prev parent reply other threads:[~2015-04-12 12:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-12 9:50 bug#20307: 25.0.50; (regexp-opt nil ...) returns "" David Kastrup
2015-04-12 12:09 ` Stefan Monnier [this message]
2015-04-13 14:08 ` Artur Malabarba
2015-04-13 15:19 ` Stefan Monnier
2015-04-13 15:34 ` David Kastrup
2015-04-13 15:59 ` Artur Malabarba
2019-02-25 14:57 ` bug#20307: [PATCH] make regexp-opt return a no-match return value with empty input Mattias Engdegård
2019-03-02 12:37 ` Eli Zaretskii
2019-03-02 14:21 ` Mattias Engdegård
2019-03-02 14:41 ` Eli Zaretskii
2019-03-02 14:49 ` Mattias Engdegård
2019-03-02 14:57 ` Eli Zaretskii
2019-03-02 15:24 ` Mattias Engdegård
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