From: Andreas Schwab <schwab@suse.de>
To: "Lennart Borgman (gmail)" <lennart.borgman@gmail.com>
Cc: emacs-pretest-bug@gnu.org
Subject: Re: Should not * be greedy in a regexp?
Date: Sat, 03 Nov 2007 19:48:29 +0100 [thread overview]
Message-ID: <jewssz5fnm.fsf@sykes.suse.de> (raw)
In-Reply-To: <472CB6AB.9020301@gmail.com> (Lennart Borgman's message of "Sat\, 03 Nov 2007 18\:58\:03 +0100")
"Lennart Borgman (gmail)" <lennart.borgman@gmail.com> writes:
> Starting from
>
> emacs -Q
>
> Put this in the *scratch* buffer and eval it:
>
> (let* ((mod-regx+ "\\(\\(?:[CSM]-\\)+\\)")
> (mod-regx* "\\(\\(?:[CSM]-\\)*\\)")
> (str "<C-S-tab>")
> (m+ (when (string-match mod-regx+ str)
> (match-string 0 str)))
> (m* (when (string-match mod-regx* str)
> (match-string 0 str))))
> (lwarn 't :warning "m+=%s, m*=%s" m+ m*))
>
> I get
>
> Warning (t): m+=C-S-, m*=
>
> Should not both this regexp give the same result here? It looks to me like
> * is treated as *? - ie non-greedy.
The regexp matches the empty string.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2007-11-03 18:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-03 17:58 Should not * be greedy in a regexp? Lennart Borgman (gmail)
2007-11-03 18:48 ` Andreas Schwab [this message]
2007-11-03 18:54 ` Andreas Schwab
2007-11-03 19:12 ` Lennart Borgman (gmail)
2007-11-04 1:55 ` Stefan Monnier
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