On Monday 10 October 2005 16:12, Jonathan Wakely wrote: > 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.
Yes, sorry for not being specific on that. It was concerning GCC, more specifically 3.3 and/or 4.0. (If there's anything specific to GCC not mentioned in the below referenced draft report, I will of course with interest read it). > 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. Exactly, that's what's needed. Thanks, Frans
