The following code example is taken from the book
C++ Templates - The Complete Guide
by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
© Copyright David Vandevoorde and Nicolai M. Josuttis 2002
template <int N>
class X {
public:
typedef int I;
void f(int) {
}
};
template<int N>
void fppm(void (X<N>::*p)(typename X<N>::I));
int main()
{
fppm(&X<33>::f); // fine: N deduced to be 33
}