[Bug libstdc++/51365] cannot use final empty class in std::tuple

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51365

--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-15 
10:06:19 UTC ---
front end changes done, I'll work on the library parts this weekend