Passing unnamed classes through functions

Question

How do I pass this instance as a parameter into a function?

class
{
    public:
    void foo();
} bar;

Do I have to name the class?
It

Answer 1

Hmmm, nameless class.

You could pass a pointer to it as void *.

Since you cannot refer to it by name, you cannot call its constructor, copy constructor, or destructor except for the one instance, so you cannot copy it.

EDIT: you could still pass it to a template function which could copy it.

REEDIT: edit was wrong.