Frans Englich wrote: > In a large project I'm participating in, a design dilemma have arrived. > Adding > virtual inheritance would solve it beautifully on the source code level, but > a potential drawback is the speed penalty it brings. Measurement is always > the way of approaching performance questions, but since that sometimes can be > tricky, I thought of starting with getting a theoretical understanding of > virtual inheritance.
If you don't mean "virtual inheritance as implemented by GCC" then this is probably the wrong place for such a question. For an understanding of how it's implemented try "Inside the C++ Object Model" by Stan Lippmann, and this draft report (especially section 5.3.6) http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1666.pdf That's by a well-respected member of the standard committee, so you can take it pretty seriously. I'd certainly give it more credence than unsubstantiated claims thrown up by googling. Regards, jon
