[Bug libstdc++/67015] "^[a-z0-9][a-z0-9-]*$", std::regex::extended is miscompiled

[timshen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67015

--- Comment #5 from Tim Shen <timshen at gcc dot gnu.org> ---
Author: timshen
Date: Wed Jul 29 04:30:25 2015
New Revision: 226337

URL: https://gcc.gnu.org/viewcvs?rev=226337&root=gcc&view=rev
Log:
        Backport from mainline
        2015-07-29  Tim Shen  <timshen@google.com>

        PR libstdc++/67015
        * include/bits/regex_compiler.h (_Compiler<>::_M_expression_term,
        _BracketMatcher<>::_M_add_collating_element): Change signature
        to make checking the and of bracket expression easier.
        * include/bits/regex_compiler.tcc (_Compiler<>::_M_expression_term):
        Treat '-' as a valid literal if it's at the end of bracket expression.
        * testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc:
        New testcases.

Modified:
    branches/gcc-5-branch/libstdc++-v3/ChangeLog
    branches/gcc-5-branch/libstdc++-v3/include/bits/regex_compiler.h
    branches/gcc-5-branch/libstdc++-v3/include/bits/regex_compiler.tcc
   
branches/gcc-5-branch/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc