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From: Chris Dennis <cgdennis@btinternet.com>
To: guile-user@gnu.org
Subject: Guile regular expressions are too greedy
Date: Wed, 22 Jul 2009 11:05:27 +0100	[thread overview]
Message-ID: <4A66E467.2060709@btinternet.com> (raw)

Hello Guile People

Is there a way to make Guile regular expressions less greedy?  I 
understand that POSIX doesn't define non-greedy modifiers.

Specifically, I'm trying to parse font names such as

     Arial 12
     Arial Bold Italic 14
     Nimbus Sans L Bold Italic Condensed 11

so that I can construct CSS styles from them.

I've tried the following, but the first (.*) gobbles up everything 
before the size because the other elements are optional:

(define s (string-match "(.*)( +(bold|semi-bold|regular|light))?( 
+(italic|oblique))?( +(condensed))? +([0-9]+)" "nimbus sans l bold 
italic condensed 11"))


Are there other ways of doing this?

cheers

Chris
-- 
Chris Dennis                                  cgdennis@btinternet.com
Fordingbridge, Hampshire, UK




             reply	other threads:[~2009-07-22 10:05 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-22 10:05 Chris Dennis [this message]
2009-07-22 12:21 ` Guile regular expressions are too greedy Ludovic Courtès
2009-07-22 13:12   ` Chris Dennis
2009-07-22 13:32     ` Ludovic Courtès
2009-07-22 13:41 ` Peter Brett
2009-07-22 15:47   ` Guile regular expressions are too greedy [Solved] Chris Dennis

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