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* [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex
@ 2013-09-30 3:06 galens at capaccess dot org
2013-09-30 3:14 ` [Bug libstdc++/58576] " galens at capaccess dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: galens at capaccess dot org @ 2013-09-30 3:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
Bug ID: 58576
Summary: std::regex_match() reports mismatched braces on a
valid regex
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: galens at capaccess dot org
Created attachment 30929
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30929&action=edit
Archive containing the g++ -v -save-temps compile log, the generated .ii file
and the original .cpp with the minimum-to-reproduce test case.
I attempted to use a regex to validate qualified hostnames.
However, when I used the regex from this thread (
http://stackoverflow.com/questions/1418423/the-hostname-regex ), with or
without replacing the [0-9A-Za-z] with [:alnum:] (and properly escaping the
backslashes), I get a regex_error exception thrown on std::regex_match() call,
with a regex_constants::error_brack as the reported code().
Using: An unmodified copy of gcc 4.8.1 20130603 from the Fedora 19 primary
repository (rpm ver: 4.8.1-1.fc19 )
(I use 4-spaces-per-tab in my source code, which isn't relevant for the code,
but might make hand-tracing of Parens, Braces, and Brackets I did in comments
more understandable.)
(And, yes, I know replacing [0-9A-Za-z] with [:alnum:] isn't a legitimate
change WRT domain name validity, unless I force a 'C' locale. It was just
easier to read when hunting down this issue.)
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/58576] std::regex_match() reports mismatched braces on a valid regex
2013-09-30 3:06 [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex galens at capaccess dot org
@ 2013-09-30 3:14 ` galens at capaccess dot org
2013-09-30 7:40 ` schwab@linux-m68k.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: galens at capaccess dot org @ 2013-09-30 3:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
Galen G Brownsmith <galens at capaccess dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #30929|0 |1
is obsolete| |
--- Comment #1 from Galen G Brownsmith <galens at capaccess dot org> ---
Created attachment 30930
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30930&action=edit
re-uploading my tar.gz -- fixed an independent but potentially distracting
typo.
There was a case where part of the regex read "(?(?:" rather than "(?:(?:".
Fixed that, behvior remains.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/58576] std::regex_match() reports mismatched braces on a valid regex
2013-09-30 3:06 [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex galens at capaccess dot org
2013-09-30 3:14 ` [Bug libstdc++/58576] " galens at capaccess dot org
@ 2013-09-30 7:40 ` schwab@linux-m68k.org
2013-09-30 9:46 ` redi at gcc dot gnu.org
2013-10-01 15:26 ` timshen at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: schwab@linux-m68k.org @ 2013-09-30 7:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
[:alnum:] only matches the six characters ":almnu". If you want to match any
letter or digit you have to write [[:alnum:]].
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/58576] std::regex_match() reports mismatched braces on a valid regex
2013-09-30 3:06 [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex galens at capaccess dot org
2013-09-30 3:14 ` [Bug libstdc++/58576] " galens at capaccess dot org
2013-09-30 7:40 ` schwab@linux-m68k.org
@ 2013-09-30 9:46 ` redi at gcc dot gnu.org
2013-10-01 15:26 ` timshen at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: redi at gcc dot gnu.org @ 2013-09-30 9:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
<regex> doesn't work in GCC 4.8
Your test works with the GCC trunk, where the work to implement regex is being
done.
*** This bug has been marked as a duplicate of bug 53631 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/58576] std::regex_match() reports mismatched braces on a valid regex
2013-09-30 3:06 [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex galens at capaccess dot org
` (2 preceding siblings ...)
2013-09-30 9:46 ` redi at gcc dot gnu.org
@ 2013-10-01 15:26 ` timshen at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: timshen at gcc dot gnu.org @ 2013-10-01 15:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58576
--- Comment #4 from Tim Shen <timshen at gcc dot gnu.org> ---
Author: timshen
Date: Tue Oct 1 15:26:50 2013
New Revision: 203067
URL: http://gcc.gnu.org/viewcvs?rev=203067&root=gcc&view=rev
Log:
2013-10-01 Tim Shen <timshen91@gmail.com>
PR libstdc++/58576
* include/bits/regex_automaton.tcc (_NFA<>::_M_eliminate_dummy)
(_StateSeq<>::_M_clone): Add _S_opcode_subexpr_lookahead branch.
* testsuite/28_regex/algorithms/regex_match/ecma/char/58576.cc: New.
Added:
trunk/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/ecma/char/58576.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/regex_automaton.tcc
^ permalink raw reply [flat|nested] 5+ messages in thread
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2013-09-30 3:06 [Bug libstdc++/58576] New: std::regex_match() reports mismatched braces on a valid regex galens at capaccess dot org
2013-09-30 3:14 ` [Bug libstdc++/58576] " galens at capaccess dot org
2013-09-30 7:40 ` schwab@linux-m68k.org
2013-09-30 9:46 ` redi at gcc dot gnu.org
2013-10-01 15:26 ` timshen at gcc dot gnu.org
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