17374dab3e
The regex_constants::multiline constant is defined for non-strict C++11 and C++14 modes, on the basis that the feature is a DR (even though it was really a new feature addition to C++17 and probably shouldn't have gone through the issues list). This makes the basic_regex::multiline constant defined consistently with the regex_constants::multiline one. For strict C++11 and C++14 mode we don't define them, because multiline is not a reserved name in those standards. libstdc++-v3/ChangeLog: * include/bits/regex.h (basic_regex::multiline): Define for non-strict C++11 and C++14 modes. * include/bits/regex_constants.h (regex_constants::multiline): Add _GLIBCXX_RESOLVE_LIB_DEFECTS comment.
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