Guys, have you ever thought about this question?

I was wondering if it's possible to have a virtual template function. That is have a class, that has as one of its member functions a templated function that is also pure virtual.

ie.

Class A {

template <class T>
virtual int foo ( T & param ) = 0;
}

// class B is dervied from class A
Class B : public class A {

template <class T>
int foo (T & param) {
// implement foo...

}

}

Hints provided by another guru:

Graham

February 23rd, 2003, 07:37 AM

Think about it for a while: how could you make a templated virtual function? What's its signature? How many vtable entries do you reserve? How would you distinguish between an override/hide and an overload?

But, though c++ dose not allow virtual template function, you can also implement this function using boost::any, search for boos::any J.

Best regards,

Xie,  Tao