Alternative schemes for implementing vptr?

Question

This question is not about the C++ language itself(ie not about the Standard) but about how to call a compiler to implement alternative schemes for virtual function.

Answer 1

You're suggestion is interesting, but it won't work if the executable is made of several modules, passing objects among them. Given they are compiled separately (say DLLs), if one module creates an object and passes it to another, and the other invokes a virtual method - how would it know which table the classid refers to? You won't be able to add another moduleid because the two modules might not know about each other when they are compiled. So unless you use pointers, I think it's a dead end...