From: "Andreas Röhler" <andreas.roehler@easy-emacs.de>
To: help-gnu-emacs@gnu.org
Subject: Re: string-match bug?
Date: Tue, 08 Dec 2009 14:55:33 +0100 [thread overview]
Message-ID: <4B1E5AD5.5000803@easy-emacs.de> (raw)
In-Reply-To: <21FFF972-3740-407A-B877-0A928E4037B6@Web.DE>
Peter Dyballa wrote:
>
> Am 08.12.2009 um 11:50 schrieb Andreas Röhler:
>
>> Barry Margolin wrote:
>>> In article <mailman.12469.1260221021.2239.help-gnu-emacs@gnu.org>,
>>> Matthew Dempsky matthew dempsky wrote:
>>>
>>> Here's another example of a limit case:
>>>
>>> (string-match "a*" "b") returns 0, because a* matches zero or more a's,
>>> and there are zero a's at position 0.
>>>
>>
>> Hmm, interesting
>>
>> IMHO that differs:
>>
>> (string-match "a*" "b") asks for a non-occurrence too. So "0" of first
>> position is plausible.
>
>
> Aren't the regular expressions "" and "a*" equivalent in that respect
> that they both also match the empty string?
>
...
Ah, see some point now. If I take the "a", nothing is left...
OTOH if (string-match "a*" "b") returns NIL, will that be less plausible?
Not sure... However, see current behavior conforms to POSIX
http://www.opengroup.org/onlinepubs/009695399/
So I'll simply keep it in mind, hopefully...
Thanks all again
Andreas
next prev parent reply other threads:[~2009-12-08 13:55 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.12437.1260197731.2239.help-gnu-emacs@gnu.org>
2009-12-07 15:08 ` string-match bug? Colin S. Miller
2009-12-07 15:25 ` Colin S. Miller
2009-12-07 20:37 ` Andreas Röhler
2009-12-07 21:23 ` Matthew Dempsky
2009-12-08 10:42 ` Andreas Röhler
2009-12-08 11:35 ` Juanma Barranquero
2009-12-08 11:50 ` Peter Münster
[not found] ` <mailman.12522.1260273034.2239.help-gnu-emacs@gnu.org>
2009-12-08 15:56 ` Stefan Monnier
[not found] ` <mailman.12517.1260268988.2239.help-gnu-emacs@gnu.org>
2009-12-14 13:53 ` David Kastrup
[not found] ` <mailman.12469.1260221021.2239.help-gnu-emacs@gnu.org>
2009-12-08 3:22 ` Barry Margolin
2009-12-08 10:50 ` Andreas Röhler
2009-12-08 11:31 ` Peter Dyballa
2009-12-08 13:55 ` Andreas Röhler [this message]
[not found] ` <mailman.12518.1260269458.2239.help-gnu-emacs@gnu.org>
2009-12-08 20:48 ` Barry Margolin
2009-12-08 21:23 ` Pascal J. Bourguignon
2009-12-09 16:16 ` Stefan Monnier
2009-12-08 23:48 ` Matthew Dempsky
2009-12-09 8:05 ` Andreas Röhler
2009-12-09 12:56 ` Juanma Barranquero
2009-12-09 17:33 ` Andreas Röhler
2009-12-09 18:07 ` Matthew Dempsky
2009-12-09 18:13 ` tomas
2009-12-09 18:59 ` Andreas Röhler
2009-12-09 21:15 ` Matthew Dempsky
[not found] ` <mailman.12615.1260385212.2239.help-gnu-emacs@gnu.org>
2009-12-10 0:22 ` Barry Margolin
2009-12-09 18:11 ` tomas
2009-12-10 3:05 ` Kevin Rodgers
[not found] ` <mailman.12630.1260414617.2239.help-gnu-emacs@gnu.org>
2009-12-10 5:34 ` Stefan Monnier
2009-12-10 10:01 ` tomas
2009-12-10 11:00 ` Andreas Politz
2009-12-11 4:37 ` Kevin Rodgers
[not found] ` <mailman.12651.1260442881.2239.help-gnu-emacs@gnu.org>
2009-12-14 13:59 ` David Kastrup
[not found] ` <mailman.12606.1260380004.2239.help-gnu-emacs@gnu.org>
2009-12-09 19:08 ` Frank Fredstone
2009-12-10 19:25 ` Andreas Röhler
2009-12-10 23:41 ` Juanma Barranquero
[not found] ` <mailman.12689.1260473128.2239.help-gnu-emacs@gnu.org>
2009-12-10 20:40 ` Frank Fredstone
2009-12-09 21:33 ` Stefan Monnier
2009-12-10 6:38 ` Andreas Röhler
2009-12-14 13:51 ` David Kastrup
2009-12-07 14:55 Andreas Roehler
2009-12-07 15:31 ` Pierre Lorenzon
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