Pointer to member

I was looking at some sample code the other day and saw something I didn't really understand. After looking over the code I found some comments that said pointer to member function.
When would you use a pointer to a class function?

I wouldn't. It's pretty much not needed with polymorphism. I have used static member functions across dll boundaries but they're really the same thing as global anyway.

data stored in lists is a classic use of pointers to member functions.

there are quite a few uses for pointers to functions. i use them in the games that i make for quick decision making

rather than

Code:

---

enum States { STATE1, STATE2, STATE3, ... };

switch(gameState)
{
    case STATE1:
        {
            func1();
            break;
        }
    case STATE2:
        {
            func2();
            break;
        }
    case STATE3:
        {
            func3();
            break;
        }
        .
        .
        .
        .
}

---

you can do this:

Code:

---

enum States { STATE1, STATE2, STATE3, ... };
typedef int (MyClass::*FuncType)(void);

static FuncType funcs[NUM_STATES] =
    {
        &MainWindow::func1,
        &MainWindow::func2,
        &MainWindow::func3,
        .
        .
        .
        .
    };

(this->*funcs[gameState])();

---

much quicker, quite funky, and very handy! :D

U.