function pointer to a class member

Question

I am trying to do some like this:

class A {
    void *(*func)(void *);

    A(void *(*function)(void *)){
        func = function;
    }
}

class B {
    voi         


        

Answer 1

You could create B like this:

struct B {
    static void *real_func(void *);
    A ptr;
    B()
    :ptr(&real_func)
    {
        ...
    }
};

A static member function acts like a regular function, so you can create a function pointer for it.

If you don't need a regular function pointer, then you can use std::function:

#include 

struct A {
    std::function func;

    A(std::function function)
    : func(function)
    {
    }
};

struct B {
    void *real_func(void *);
    A ptr;
    B()
    : ptr(std::bind(&B::real_func,this,std::placeholders::_1))
    {
    }
};