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.
From-SVN: r226336
f9ce3c1639