Re: circular function pointers declaration?

Timothee Groleau wrote:


OPTION A
----------------------------------------------
Simply:

     typedef unsigned long (*myFuncPtr) (void*);

Just be careful to cast your pointers to void*.

OPTION B
----------------------------------------------
Abstract base class approach:

    class my_itf
    {
    public:
        virtual unsigned long
            operator()(my_itf& pnext) = 0;
    };

    template <unsigned long N>
        class my_itf_end: public my_itf
        {
        public:
            unsigned long operator()(my_itf&)
            {
                return N;
            }
        };

which can be used like:

    class A: public my_itf
    {
    public:
        unsigned long operator()(my_itf& next)
        {
            return next(my_itf_end<5>());
        }
    };

    int main()
    {
        A a;
        my_itf& f = a;

        f(f);
    }

Pick your poison :)

Regards,
Ben