Array of Pointers to Functions in Structs...

The title sums up my problem. I'm getting all sorts of errors, some saying that '=' doesn't work and undeclared identifiers, etc... I googled it and tried it some other ways but nothing seems to be working... here's what I've tried:

Code:

---

struct TEST
{
        void FunctionA();
        void FunctionB();

        void (*Point[2])(void); // Array Function Pointer
};

int main()
{
        TEST test;

        test.Point[0] = &TEST::FunctionA; // This doesn't work
        test.Point[1] = test.FunctionB; // Same with this
}

---

Thanks.

You can't assign a non static method to a function pointer. You have to use member pointers.

Change this:

Code:

---

void (*Point[2])(void);

---

to:

Code:

---

void (TEST::*Point[2])(void);

---

Then use the &TEST::FunctionA syntax. That said, why do you want to do this? There may be better ways, after all.

Ah, I see... thanks alot.

Argh, I got another problem. This time I'm trying to access the function. Why doesn't this work?

Code:

---

test.*Point[1]();

---

I get an error saying "'Point' : undeclared identifier".

Thanks for the quick replys, too.

Use the same syntax you used to assign it.

The () at the end makes it into a function call.

If you mean by doing this:

Code:

---

test.Point[1]();

---

It doesn't work. I get this error for the line:

Term does not evaluate to a function taking 0 arguments

Thanks in advance.

What is your current code?

Okay, this is my (simplified) code that generates the error:

Code:

---

#include <iostream>

using namespace std;

struct TEST
{
        void (TEST::*point[2])();
        void funca(){cout << "A" ;};
        void funcb(){cout << "B" ;};
} test;

int main()
{
        test.point[0] = &TEST::funca;
        test.point[1] = &TEST::funcb;

        test.point[0](); // ***ERROR HERE***
        test.point[1](); // ***ERROR HERE***
        cin.get();

    return 0;
}

---

Code:

---

error C2064: term does not evaluate to a function taking 0 arguments

---

Thanks for the help!

In this case, gcc's error message may give you a push:

Code:

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error: must use ‘.*’ or ‘->*’ to call pointer-to-member function in ‘test.TEST::point[0] (...)’

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Edit: It may also help to note that test.point[0] is the pointer-to-member-function -- so you'll actually have to call it as:

Code:

---

(test.*(test.point[0]))();

---

In other words, now that you have that pointer, you'll have to still use it on the right-hand side of a .* operator.

Ah, yes, that got it working. Thankyou very much!