From: Aaron Patterson <aaron@...>
Date: 2009-09-04T09:49:25+09:00
Subject: Re: Oniguruma: Different result in ruby 1.9.1 and 1.8.7

On Sep 3, 2009, at 5:33 PM, Miguel Teixeira wrote:

> Hi,
>
> I have the following regular expression created in ruby 1.9.1:
>
> /(?:(?:\$(?'name1'[\w\s\']+)(?:(?'name2'(?:created|developed)[\w\s]+) 
> (?name3'(?:in|at)[\w\s]+)))|(?:\$(?'name1'[\w\s\']+)(?'name2'(:? 
> created|developed)[\w\s]+))|(?:\$(?'name1'[\w\s\']+)(?'name3'(?:in| 
> at)[\w\s]+)))(?:\.(?'name4'[\w\s]+))?/.match(str)
>
> To use Oniguruma i have installed the following gem:
> http://github.com/geoffgarside/oniguruma/tree/master
>
> (also tried with this solution:
> http://www.goodbyehelicopter.com/2008/02/20/install-oniguruma-on-os- 
> x/)
>
> After the installation of Oniguruma i have created the following  
> regular
> expression in ruby 1.8.7:
> Oniguruma::ORegexp.new('(?:(?:\$(?\'name1\'[\w\s\']+)(?:(? 
> \'name2\'(?:created|developed)[\w\s]+)(?\'name3\'(?:in|at)[\w\s]+)))| 
> (?:\$(?\'name1\'[\w\s\']+)(?\'name2\'(:?created|developed)[\w\s]+))| 
> (?:\$(?\'name1\'[\w\s\']+)(?\'name3\'(?:in|at)[\w\s]+)))(?:\.(? 
> \'name4\'[\w\s]+))?').match(str)
>
> My problem is that the result in ruby 1.8.7 is different from the  
> result
> in 1.9.1.
> Anyone has an idea about what's going on?
>
> I also tried to substitute ?\'name1\' with ?<name1>

That expression is rather long.  Have you tried reducing the regular  
expression to the smallest possible case that will make it break?

---
Aaron Patterson
http://tenderlovemaking.com