http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55576
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-12-03 16:00:35 UTC --- I don't think this is a G++ bug, there are three problems with this code: 1) You need to #include <new> to use placement new 2) factory::apply is non-const but the parameter 'f' is const 3) f.template apply<T> finds the current instantiation, ::apply<T>, rather than the member function you are trying to call, use f.FactoryT::template apply<T> instead
