Mapping a class and a member function

Question

Hi, Can someone suggest me a way to map a template classes with a set of member functions from another class? Whenever i call one of the function inside a template class, it should call the associated member function of the other class.

Updating with a use-case

template<int walktype>
class Walker
{
   Node* node;

    bool walk()
    {
        switch(walktype)
        case 1:
            node->firstwalk();
        case 2:
            node->secondwalk();
        ......

    }
};

Please consider the above one as a pseudo-code. I want the switch-case decision to be taken at the compile time.

Thanks, Gokul.

Answer 1

It seems you want it to be selected in compile time so you can especialize you class template like this:

// corresponding to if (walktype != 1) ... condition
template<int>
class Walker
{
    Node* node;

    bool walk()
    {
        node->secondwalk();
    }
};

// corresponding to if (walktype == 1) ... condition
template<>
class Walker<1>
{
    Node* node;
    bool walk()
    {
        node->firstwalk();
    }
};

Answer 2

I found a way to do it using boost::mpl::map. I need to create a type out of the function and use that type as a template parameter for the class and associate this class with the original class using boost::mpl::map.

Thanks, Gokul.