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Date: Sat, 18 Apr 2020 11:07:20 +0000
From: "liheng (P)" <liheng40@...wei.com>
To: Florian Weimer <fw@...eb.enyo.de>
CC: Rich Felker <dalias@...c.org>, "musl@...ts.openwall.com"
<musl@...ts.openwall.com>, "Xiangrui (Euler)" <rui.xiang@...wei.com>, Lizefan
<lizefan@...wei.com>
Subject: RE: regex Back reference matching result not same as glibc
and tre.
static const char pat[] = "\\(.?\\).?\\1";
string: "aba";
I tested this pattern by my test case just now.
musl:
# ./test
regexec failed
test regex failed
glibc:
# ./test
Invalid back reference
test regex failed
tre:
# ./test
Invalid back reference
test regex failed
-----Original Message-----
From: Florian Weimer [mailto:fw@...eb.enyo.de]
Sent: Saturday, April 18, 2020 6:29 PM
To: liheng (P) <liheng40@...wei.com>
Cc: Rich Felker <dalias@...c.org>; musl@...ts.openwall.com; Xiangrui (Euler) <rui.xiang@...wei.com>; Lizefan <lizefan@...wei.com>
Subject: Re: [musl] regex Back reference matching result not same as glibc and tre.
* liheng:
> static const char pat[] = "(.?).?\\1";
> This commit reminds me that if i want to use back reference i should
> not to tag REG_EXTENDED, but this test case matching still failed.
Did you change the expression to this for the basic regular expression test?
static const char pat[] = "\\(.?\\).?\\1";
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