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From: kai.grossjohann@gmx.net (Kai Großjohann)
Subject: Re: regexp and strings you don't want
Date: Fri, 29 Aug 2003 21:58:10 +0200	[thread overview]
Message-ID: <84isogutgt.fsf@slowfox.is.informatik.uni-duisburg.de> (raw)
In-Reply-To: usmnk1eol.fsf@ID-87814.user.dfncis.de

Oliver Scholz <alkibiades@gmx.de> writes:

> I've played a bit with this (patch below). But I thing I am a bit
> puzzled. With my patch, `(rx (not top))' translates to:
>
> "\\(?:[^t]*\\|t[^o]*\\|to[^p]*\\)"
>
> Is this actually correct?

Well, err, it depends.

I guess one meaningful meaning of the hypothetical x\\(!:top\\)y would
be to look whether the characters following x are t-o-p.  If so, then
fail.  If not, then do like xy would have done.

That's what Perl does, I believe.
-- 
Two cafe au lait please, but without milk.

  reply	other threads:[~2003-08-29 19:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-25 19:45 regexp and strings you don't want Chaz
2003-08-25 20:17 ` Barry Margolin
2003-08-26 18:13   ` Chaz
2003-08-27 15:13     ` Kevin Rodgers
2003-08-29 15:50     ` Stefan Monnier
2003-08-26 22:19 ` Eric Pement
2003-08-27 20:26 ` Kai Großjohann
2003-08-29 16:14   ` Oliver Scholz
2003-08-29 18:50     ` Oliver Scholz
2003-08-29 19:58       ` Kai Großjohann [this message]
2003-08-29 20:38         ` Oliver Scholz
2003-08-30 14:50         ` Ilya Zakharevich

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