c++ data alignment /member order & inheritance

Question

How do data members get aligned / ordered if inheritance / multiple inheritance is used? Is this compiler specific?

Is there a way to specify in a derived class how

Answer 1

It's not just compiler specific - it's likely to be affected by compiler options. I'm not aware of any compilers that give you fine grained control over how members and bases are packed and ordered with multiple inheritance.

If you're doing something that relies on order and packing, try storing a POD struct inside your class and using that.