From: Eric Hodel <drbrain@...7.net>
Date: 2009-04-06T14:42:24+09:00
Subject: Re: Ruby 1.9.1 - invalid multibyte escape: /[\xC0-\xDF]/ (RegexpError)


On Apr 4, 2009, at 12:40, Iņaki Baz Castillo wrote:

> Hi, using TreeTop parser I had a grammar defined working in Ruby1.8  
> but it
> fails in 1.9.1:
>
>  ~# ruby1.8 -e "Regexp.new('[\xC0-\xDF]')"
>  OK
>
>  ~# ruby1.9 -e "Regexp.new('[\xC0-\xDF]')"
>  -e:1:in `initialize': invalid multibyte escape: /[\xC0-\xDF]/  
> (RegexpError)
>
> I've found the following text about differences between 1.8 and 1.9:
>
> "It is more rigorous that 1.8 when it comes to detecting invalid  
> code. For
> example, 1.8 accepts /[^\x00-\xa0]/u, while 1.9 complains of invalid  
> multibyte
> escape"
>
> Ok, so how should I write the above Regexp to work on 1.9.1?

Regexp.new '[\xC0-\xDF]', nil, 'n'