Effective C + +-----clause 40: Use multiple inheritance wisely and prudently

Multiple inheritance is more complex than single inheritance. It can lead to new ambiguity and the need for virtual inheritance.

Virtual inheritance increases the cost of size, speed, initialization (and assignment) complexity, and so on. If virtual base classes does not carry any data, it will be the most useful case.

Multiple inheritance does have a legitimate purpose. One of the episodes involves the two-phase combination of "public inheriting a interface class" and "private inheriting a class of assistance implementations."

Effective C + +-----clause 40: Use multiple inheritance wisely and prudently