Effective C + +-----clause 35: Consider alternatives other than the virtual function

The alternative scheme of virtual function includes NVI technique and strategy design mode. The NVI technique itself is a special form of template method design mode.

One drawback of moving functions from member functions to class external functions is that non-member functions cannot access the Non-public members of class.

The Tr1::function object behaves like a generic function pointer. Such an object can accept all the callable objects (callable entities) that are compatible with the given target signature (target signature).

Effective C + +-----clause 35: Consider alternatives other than the virtual function