[comp.lang.c++] Friends of a derived class

awehrmann@watcgl.waterloo.edu (August Wehrmann) (01/21/90)

To quote Lippman (p314): "A protected class member is public to the member
functions and friends of a derived class;"

With this I formed the following classes:



class	DLLElement {			//Base class

protected:

	DLLElement	*previous;
	DLLElement	*next;

public:

	DLLElement();

};



class	Element	: public DLLElement	//Derived class from DLLElement
{

friend	class	List;

	int	data;

public:

	Element(int=0);

};



class	List				//Friend of Element
{
};

The problem is that I have a member function of List (a friend of Element)
that wishes to use (not modify) the protected variable "next" in the
base class DLLElement.

From the above quote I assumed that this was possible but the compiler 
screams at me saying that next is protected and that my member function
within the class List cannot access it.

Is there a way to acheive what I'm trying to do here? What am I doing wrong?

Thanks

-- 
===============================================================================
 August Wehrmann, awehrmann@watcgl{.waterloo.edu, UWaterloo.ca} 
 Computer Graphics Lab, Department of Computer Science, University of Waterloo
===============================================================================