From: Jeff King <peff@peff.net>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] Interpret :/<pattern> as a regular expression
Date: Wed, 13 Jun 2007 16:00:11 -0400 [thread overview]
Message-ID: <20070613200011.GA17360@coredump.intra.peff.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0706131953370.4059@racer.site>
On Wed, Jun 13, 2007 at 07:54:59PM +0100, Johannes Schindelin wrote:
> :-) Since you seem comfortable with regular expressions, maybe you can
> help me: I am looking for a pattern which matches _any_ character, and one
> which matches only non-newlines, both with and without REG_NEWLINE. Hmm?
Without REG_NEWLINE, any character is just '.', but I think you are
stuck with '[^
]' for non-newlines, since POSIX makes no provisions for quoting the
newline (I just skimmed through POSIX chapter 9, and I didn't see
anything useful).
With REG_NEWLINE, non-newlines is of course '.'. Matching both is tricky
without using extended regular expressions (where you could just do '.|
'). In fact, I have been playing with it for a few minutes and I can't
seem to find a good way, since you really want to represent '.' _inside_
a bracketed alternation sequence. But I don't think there's a character
class for "everything".
I think this would be much easier with pcre, but ISTR some opposition to
that a few months back.
So that's probably not very helpful to you, but at least you have
confirmation from one other person that the answer isn't totally
obvious. :)
-Peff
next prev parent reply other threads:[~2007-06-13 20:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-13 0:50 [PATCH] Interpret :/<pattern> as a regular expression Johannes Schindelin
2007-06-13 1:21 ` Junio C Hamano
2007-06-13 13:13 ` Johannes Schindelin
2007-06-13 4:52 ` Junio C Hamano
2007-06-13 11:10 ` Johannes Schindelin
2007-06-13 11:17 ` (unknown) Johannes Schindelin
2007-06-13 12:11 ` [PATCH] Interpret :/<pattern> as a regular expression Johannes Schindelin
2007-06-13 18:41 ` Jeff King
2007-06-13 18:54 ` Johannes Schindelin
2007-06-13 20:00 ` Jeff King [this message]
2007-06-13 22:20 ` Johannes Schindelin
2007-06-14 7:48 ` Sam Vilain
2007-06-14 8:09 ` Johannes Schindelin
2007-06-14 9:07 ` Sam Vilain
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