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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
end of thread, other threads:[~2013-10-01 15:26 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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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