From: nobu.nokada@...
Date: 2002-05-08T08:47:55+09:00
Subject: Re: RegExp zero-width negative lookahead

Hi,

At Wed, 8 May 2002 00:58:07 +0900,
Ian Macdonald wrote:
> > "xxoxxxo xx" =~ /(?<!x)ox+o(?!x)/      #=> nil (with Oniguruma)
> 
> I'm used to that in Perl, but I've tried this in Ruby before and found
> that it's not supported in either 1.6.7 or the latest 1.7.2 snapshot.
> 
> Is this available in an external library?

You need to check out oniguruma from CVS, apply the patch and
recompile ruby.

-- 
Nobu Nakada