buggrep - Bugs: bug #32337, [:alnum:] dependance on locale is...

 
 

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bug #32337: [:alnum:] dependance on locale is not well documented

Submitter:  None
Submitted:  Thu 03 Feb 2011 12:07:11 PM UTC
   
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  Confirmed
Privacy:  Public Assigned to:  None
Open/Closed:  Closed

Wed 29 Jun 2011 06:30:45 AM UTC, comment #2: 

Fixed in commit 406ab56cdd977fbd05216392ac655dd7204a307a



Thank you for the bug report. This bug has been fixed in the
development sources, which can be downloaded using git from
git://git.sv.gnu.org/grep.git

Paolo Bonzini <bonzini>
Thu 03 Feb 2011 01:03:14 PM UTC, comment #1: 

The man page here is misleading. [:alnum:] does not mean a-zA-Z0-9, it means "the set of characters with the letter and/or number property in the current locale".

Grep's behavior is correct here, but the man page could do with improvement. Suggested rewording:

For example, [[:alnum:]] means the character class of numbers and letters in the current locale (in the C locale and ASCII character set encoding, this is the same as [0-9A-Za-z]).

Reuben Thomas <rrt>
Thu 03 Feb 2011 12:07:11 PM UTC, original submission:  

In the grep man page it is written: "For  example, [[:alnum:]]
means [0-9A-Za-z], except the latter form depends upon the C
locale and the ASCII character encoding, whereas the former is
independent of locale and character set."

However, in my UTF-8 environment (LANG=de_DE.UTF-8) I get

$ echo -e "Haus\nHäuser\n" | LANG=de_DE.UTF-8 ./grep -E '^[[:alnum:]]+$'
Haus
Häuser

$ echo -e "Haus\nHäuser\n" | LANG=C ./grep -E '^[[:alnum:]]+$'
Haus

From the man-page I expected both cases to match only against the first line.

grep-version: 2.7 (also confirmed on 2.5.3 and 2.5.4)
debian lenny

Anonymous

 

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Depends on the following items: None found

Items that depend on this one: None found

 

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  • -email is unavailable- added by bonzini (Posted a comment)
  • -email is unavailable- added by slavazanko (Related to https://savannah.gnu.org/bugs/?24452)
  • -email is unavailable- added by rrt (Posted a comment)
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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2011-06-29 bonzini StatusNone Confirmed
        Open/ClosedOpen Closed
        Summary[:alnum:] depends on locale [:alnum:] dependance on locale is not well documented
    2011-06-28 slavazanko Carbon-Copy- Added slavazanko

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