What does “Class* &cls” mean in C++'s function definition?

Question

I know Class *cls is a pointer, and Class &cls takes the address, but what is

void fucction1( Class *&cls)

If I have Class c

Answer 1

Class c;
Class* c_ptr = &c;
function1(c_ptr);

Would work. But note that rvalue-references is only possible with C++0x which most compilers haven't fully implemented them. Thus the following wouldn't work:

Class c;
function1(&c);