From: Yukihiro Matsumoto <matz@...>
Date: 2008-07-10T08:25:18+09:00
Subject: Re: String#upcase/downcase with UTF-8 strings in Ruby 1.9

Hi,

In message "Re: String#upcase/downcase with UTF-8 strings in Ruby 1.9"
    on Thu, 10 Jul 2008 07:09:29 +0900, "Stefan Schmidt" <Stefan.Schmidt@gmx.net> writes:

|in Ruby 1.9 I get the following behaviour:
|
|>> "aoueäöüé".upcase
|=> "AOUEäöüé"
|>> "AOUEÄÖÜÉ".downcase
|=> "aoueÄÖÜÉ"
|
|I can't find however find a bug in the bug tracking system.
|Doesn't this qualify as a bug?

The document for String#upcase says:

  call-seq:
     str.upcase   => new_str
  
  Returns a copy of <i>str</i> with all lowercase letters replaced with their
  uppercase counterparts. The operation is locale insensitive---only
  characters ``a'' to ``z'' are affected.
  Note: case replacement is effective only in ASCII region.
     
     "hEllO".upcase   #=> "HELLO"

See "Note:".  Tim Bray have persuaded me to do so, since case
conversion outside of ASCII region is highly dependent on country,
language, culture and script.

							matz.