Описание тега member-function-pointers

In C++ a member function pointer is a special pointer type that refers to a specific member function of a class.

A member function pointer mfp can be declared as:

Ret (Class::* mfp )( Arg0, Arg1 );

This declares mfp as a pointer to a member function of the class Class, and as a member function which returns Ret and takes two arguments of types Arg0 and Arg1.

The address of a member function is taken using the & operator, qualifying the function name with the class name, e.g. mfp = &Class::func;

A member function pointer may not be represented as a simple address in memory and for some implementations sizeof(&X::f) != sizeof(void*). As a result, pointers to members cannot be converted to void* like other pointers.

The C++ FAQ has a section on member function pointers.