General rules of passing/returning reference of array (not pointer) to/from a function?

Question

We can pass reference of an array to a function like:

void f(int (&a)[5]);

int x[5];
f(x);     //okay
int y[6];
f(y);     //error - type of y is not `in         


        

Answer 1

Supplemental to the fine answer by sth, here is how to declare a class with a constant method returning an array reference:

class MyClass
{
public:
    const int (&getIntArray() const)[10];
};