Re: 'CObject::operator =' : cannot access private member declared in class 'CObject'

Hello!
I'm trying to implement a simple representation of a graph. Here is =

code:
 
//--------vertex.h------------
#pragma once
 
class CVertex : public CObject
{
public:
CVertex();
virtual ~CVertex();
protected:
int m_xPos;
int m_yPos;
CPtrList m_neigbors;
public:
virtual int const GetXPos(void);
virtual int const GetYPos(void);
virtual void SetXPos(int newXPos);
virtual void SetYPos(int newYPos);
virtual void AddNeighbor(CVertex* vertex);
virtual CPtrList* const GetNeighbors();
};
 
 
//--------graph.h------------
#pragma once
#include "vertex.h"
 
class CGraph : public CObject
{
public:
CGraph();
virtual ~CGraph();
protected:
CList<CVertex, CVertex&> vertices;
};
 
Now I get the following compiler error:
error C2248: 'CObject::operator =' : cannot access private member
declared in class 'CObject'
...
This diagnostic occurred in the compiler generated function 'CVertex
&CVertex::operator =(const CVertex &)'
 
What is going wrong here it must have something todo with the CList
object, but why is there some sort of operator overloading needed? The =

default (comparing two pointer adresses) should do the job for that
CList. What am I missing here?