http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43241
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-14 15:13:57 UTC --- It's a known issue that std::regex is incomplete, as documented in the libstdc++ manual. If it makes you feel better file a bug, but it isn't going to make any difference to anything. We know it's incomplete, we haven't forgotten, we aren't waiting until someone notices before working on it. As Paolo says, contributions would be far more helpful than a bug report.
