Question

I have the following situation:

typedef void (*F_POINTER)(ClassName*);

class ClassName {
    public:
        F_POINTER f;
}

This happens because an instance of ClassName needs to pass a pointer itself to the client. However, If I write things in this order, I get complains about ClassName not declared, whatnot. However, if I switch them around, I get complains about F_POINTER not being declared when I declare the instance in the class.

So maybe I’m missing something simple here, but how would I accomplish this?

Answer 1

Forward declaration:

class ClassName;

typedef (*F_POINTER)(ClassName*);

class ClassName {
    public:
        F_POINTER f;
}

Or shorter:

typedef (*F_POINTER)(class ClassName*); // implicit declaration;