GNU bug report logs - #5970
regex won't do lazy matching

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Message #34 received at 5970 <at> debbugs.gnu.org (full text, mbox):

From: Linda Walsh <coreutils <at> tlinx.org>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: a g <mewalig <at> gmail.com>, 5970 <at> debbugs.gnu.org
Subject: Re: bug#5970: regex won't do lazy matching
Date: Sun, 02 May 2010 23:21:17 -0700

Andreas Schwab wrote:
> a g <mewalig <at> gmail.com> writes:
> 
>>   regex_test "a[^x]*?a" "a1a2a"
> 
> <http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_04_06>:
> 
>  9.4.6 EREs Matching Multiple Characters
>    [...]
>    The behavior of multiple adjacent duplication symbols ('+', '*', '?',
>    and intervals) produces undefined results.
> 
> Andreas.
---

Sorry, late to conversation, but reading email.

There was a time in QA that "undefined results" and bug was synonymous.

That a spec would say that is lame.

Personally, I think if it isn't compatible with the Perl Regex, it's
a bug, but that's purely informed personal bias.  :-)

-l

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