Item 40: Use multiple inheritance judiciously(Effective C++)

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

• Virtual inheritance imposes costs in size, speed, and complexity of initialization and assignment. It's most practical when virtual base classes have no data.

• Multiple inheritance does have legitimate uses. One scenario involves combining public inheritance from an Interface class with private inheritance from a class that helps with implementation.