GNU bug report logs - #16927
[PATCH] grep: avoid to add same character to a bracket expression

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
Subject: bug#16927: closed (Re: bug#16927: [PATCH] grep: avoid to add same
 character to a bracket expression)
Date: Mon, 03 Mar 2014 15:32:02 +0000

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Your bug report

#16927: [PATCH] grep: avoid to add same character to a bracket expression

which was filed against the grep package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16927 <at> debbugs.gnu.org.

-- 
16927: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16927
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Norihiro Tanaka <noritnk <at> kcn.ne.jp>, 16927-done <at> debbugs.gnu.org
Subject: Re: bug#16927: [PATCH] grep: avoid to add same character to a bracket
 expression
Date: Mon, 03 Mar 2014 07:31:19 -0800

Thanks, I installed that.

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From: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
To: submit <at> debbugs.gnu.org
Subject: [PATCH] grep: avoid to add same character to a bracket expression
Date: Mon, 03 Mar 2014 22:13:00 +0900

[Message part 4 (text/plain, inline)]

Package: grep
Tags: patch

The patch avoids to add same character to a bracket expression in
trivial_case_ignore.  That may be able to generate smaller tokens in
multibyte locales.

For example, FULLWIDTH LATIN CAPITAL LETTER A (ef bd 81) will transform
as below, because multibyte characters in CSET is extended to OR
expressions in DFA.

Before the patch:

[AAa] (where each charactecter is fullwidth)
EF BD CAT 81 CAT EF BD CAT 81 CAT OR EF BC CAT A1 CAT OR

After the patch:

[Aa] (where each charactecter is fullwidth)
EF BD CAT 81 CAT EF BC CAT A1 CAT OR

[patch.txt (application/octet-stream, attachment)]

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