[Bug libstdc++/52719] C++11 std::regex is broken compiling simple regular expressions

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52719

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-03-26 09:47:12 UTC ---
(In reply to comment #4)
> std::regex is quite unusable in its current form.

And documented as such in
http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2011

The whole of Clause 28 is partially supported or not supported at all.