Override a virtual function with a template?

Visual Studio Express 2008 won't accept this program:

    #include <iostream>
    using namespace std;

    struct Base
    {
      virtual void test(int) = 0;
    };

    struct Derived : Base
    {
      template<typename T> void test(T)
      {
        cout << "ok\n";
      }
    };

    int main()
    {
      Derived d;
      d.test(0);
      return 0;
    }

....because 'void Base::test(int)' : is abstract. It may be right,
though. Templates are instantiated when used, I suppose the question
is: what does 'use' mean exactly.

Can someone point me to the part of the standard that is relevant to
my example?

Thanks,
Jean-Louis

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