C++ How to pass member function pointer to another class?

Question

Here is what I want to realize:

class Delegate
{
public:
    void SetFunction(void(*fun)());
private:
    void(*mEventFunction)();
}

Then i

Answer 1

In order to call a member function, you need both pointer to member function and the object. However, given that member function type actually includes the class containting the function (in your example, it would be void (Test:: *mEventFunction)(); and would work with Test members only, the better solution is to use std::function. This is how it would look like:

class Delegate {
public:
    void SetFunction(std::function fn) { mEventFunction = fn);
private:
    std::function fn;
}

Test::Test() {
    Delegate testClass; // No need for dynamic allocation
    testClass->SetFunction(std::bind(&Test::OnEventStarted, this));
}