Question about an example from rule 9-3-1

[cxlin]

Hi MISRA,

I have a question about the following example from rule 9-3-1:

Code:

class C {
public:
  C ( int &b_ ) : b( b_ ) { }

  int *getB () const
  {
    return &b;  // Non-compliant
  }
private:
  int &b;
}

Here `getB` actually returns a pointer to the object that `b` referenced, not the member `b` itself. And that object doesn't seem to satisfy the definition of "class data" by 1) it's not non-staitc member data, and 2) it's not a resource acquired in the constructor or released in the destructor. So I'm not sure why this is a Non-compliant case. Could you help to clarify a bit? Thanks!