[bug #19637] w and [[:alnum:]] not equivalent in multibyte locale

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?19637>

                 Summary: \w and [[:alnum:]] not equivalent in multibyte
locale
                 Project: grep
            Submitted by: None
            Submitted on: Freitag 20.04.2007 um 08:26 UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

In grep's manpage I found:

  The symbol \w is a synonym for [[:alnum:]]

This is true in a single-byte locale
(terminal = xterm -en iso-8859-1):

 echo -e "a\nä\n" | LC_ALL=de_DE ./grep -E '\w'
 a
 ä
 echo -e "a\nä\n_" | LC_ALL=de_DE ./grep -E '[[:alnum:]]'
 a
 ä

But not in an utf-8 locale
(terminal xterm -u8):

 echo -e "a\nä" | LC_ALL=de_DE.utf8 ./grep -P '\w'
 a
 echo -e "a\nä\n_" | LC_ALL=de_DE.utf8 ./grep -E '[[:alnum:]]'
 a
 ä

System: 

  openSUSE 10.2

  grep from CVS

[volga:src] uname -a
Linux volga 2.6.18.8-0.1-default #1 SMP Fri Mar 2 13:51:59 UTC 2007 i686 i686
i386 GNU/Linux
[volga:src] locale -V
locale (GNU libc) 2.5
...
[volga:src] ./grep -V
GNU grep 2.5.1-cvs
...


Thanks, Sebastian

(wastl[]cis.uni-muenchen.de)

 





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