From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: Help with regexp
Date: Wed, 02 Dec 2009 22:48:40 -0500 [thread overview]
Message-ID: <jwvpr6wyazp.fsf-monnier+gnu.emacs.help@gnu.org> (raw)
In-Reply-To: mailman.11999.1259731365.2239.help-gnu-emacs@gnu.org
>> > Hi,
>> >
>> > I am trying to find the regexp that could match on these:
>> >
>> > "=>foo"
> [...]
>> "=>\\([^:]*\\(\\|:[^:]*\\(\\|:[^:]*\\)\\)\\)"
> Wow, Pascal. You have taught this old dog a new trick. Up to now, I
> hadn't thought of putting an alternative (i.e. "|") at the start of a
> parenthesized sub-expression. Thanks :-)
An equivalent way is to use ? (or ?? if you care about the order in
which it's matched):
"=>\\([^:]*\\(:[^:]*\\(:[^:]*\\)?\\)?\\)"
Stefan
next prev parent reply other threads:[~2009-12-03 3:48 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.11978.1259698881.2239.help-gnu-emacs@gnu.org>
2009-12-01 21:07 ` Help with regexp Pascal J. Bourguignon
2009-12-02 5:16 ` tomas
2009-12-02 6:03 ` Andreas Politz
2009-12-02 7:11 ` tomas
2009-12-02 8:14 ` Andreas Politz
2009-12-05 6:46 ` tomas
2009-12-02 7:18 ` suvayu ali
[not found] ` <mailman.12000.1259733814.2239.help-gnu-emacs@gnu.org>
2009-12-02 9:41 ` harven
2009-12-02 13:31 ` Andreas Politz
2009-12-02 16:05 ` Lennart Borgman
2009-12-02 16:56 ` Andreas Politz
2009-12-02 17:16 ` Lennart Borgman
[not found] ` <mailman.12039.1259774199.2239.help-gnu-emacs@gnu.org>
2009-12-02 20:00 ` harven
2009-12-02 17:01 ` Andreas Politz
[not found] ` <mailman.12029.1259760724.2239.help-gnu-emacs@gnu.org>
2009-12-02 14:16 ` Pascal J. Bourguignon
2009-12-02 6:36 ` Xavier Maillard
[not found] ` <mailman.12002.1259735748.2239.help-gnu-emacs@gnu.org>
2009-12-02 11:16 ` Pascal J. Bourguignon
[not found] ` <mailman.11999.1259731365.2239.help-gnu-emacs@gnu.org>
2009-12-03 3:48 ` Stefan Monnier [this message]
2009-12-02 15:37 ` Colin S. Miller
2009-12-01 20:21 Xavier Maillard
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