[Bug libstdc++/58886] regex with (?s) (valid in Java and boost) yields regex_error

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58886

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Do we have any idea about Visual C++ and clang++? If this kind of extension is
really popular we may want to include it under gnu++11 only, like we did
another time.