http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51365
--- Comment #11 from Marc Glisse <marc.glisse at normalesup dot org> 2011-12-11 13:51:20 UTC --- (In reply to comment #10) > I haven't really thought about it either, but one advantage of depending on > is_empty is that it prevents using the EBO for polymorphic classes, where > derivation could have undesirable effects. Ah, right, the set of types that can safely be derived from is rather restricted: non-builtin, non-final, non-virtual (and possibly more constraints). And to benefit from additional packing: non-C++03-POD. Probably not worth the trouble...
