Where is the “virtual” keyword necessary in a complex multiple inheritance hierarchy?

Question

I understand the basics of C++ virtual inheritance. However, I\'m confused about where exactly I need to use the virtual keyword with a complex class hierarchy. F

Answer 1

If you want to have only one "physical" instance of each type for each instance of each type (only one A, only one B etc.) You'll just have to use virtual inheritance each time you use inheritance.

If you want separate instances of one of the types, use normal inheritance.