[Bug libstdc++/98723] On Windows with CP936 encoding, regex compiles very slow.

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98723

--- Comment #7 from cqwrteur <unlvsur at live dot com> ---
well the right solution is to write the regex by yourself. C++ regex might be
deprecated in the future.