From: Sam Ruby <rubys@...>
Date: 2008-01-29T06:29:47+09:00
Subject: Re: Is "Regexp#ascii_only?" needed?

Sam Ruby wrote:
> Note the warning message in the following:
> 
> $ irb
> irb(main):001:0> RUBY_DESCRIPTION
> => "ruby 1.9.0 (2008-01-29 revision 15303) [i686-linux]"
> irb(main):002:0> "\u00A0" =~ /\s/
> (irb):2: warning: regexp match /.../n against to UTF-8 string
> => 0
> irb(main):003:0>

As of revision 15304, this no longer is an issue as the warning is no 
longer issued.  Thanks!

> It also appears that Regexp.new behaves differently:
> 
> $ irb
> irb(main):001:0> RUBY_DESCRIPTION
> => "ruby 1.9.0 (2008-01-29 revision 15303) [i686-linux]"
> irb(main):002:0> /\s/mu.encoding
> => #<Encoding:UTF-8>
> irb(main):003:0> Regexp.new('\s',Regexp::MULTILINE,'u').encoding
> => #<Encoding:US-ASCII>

These encodings remain different.

- Sam Ruby