On Monday, 27 June 2016 at 16:03:44 UTC, luminousone wrote: > C++ post pended vtable pointers, Are not implementation > dependent. I don't know what «post pended vtable pointers» means. Which section of the C++ spec are you referring to? http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4296.pdf