http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54859
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |rejects-valid CC| |redi at gcc dot gnu.org --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-08 15:08:15 UTC --- template<unsigned N> using Num = int; template<typename... Types> using Count = Num<sizeof...(Types)>; Count<int, char, void> i; This claims sizeof is not a constant: e.C:5:37: error: integral expression 'sizeof (Types ...)' is not constant