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

[redi at gcc dot gnu.org]

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

             Bug #: 51365
           Summary: cannot use final empty class in std::tuple
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: redi@gcc.gnu.org


#include <tuple>
struct F final { };
std::tuple<F> t;

This should work. I don't know how to make it work without a compiler-assisted
is_final trait.