Thread: copy constructor doesn't invoke

In RBNode:

Code:

virtual RBNode & operator=(const RBNode & rhs);

RBNode & RBNode::operator=(const RBNode & rhs)
{
	this->left = rhs.left;
	this->right = rhs.right;
	this->parent = rhs.parent;
	this->color = rhs.color;
	
	return *this;
}

I put a breakpoint there and it doesn't stop. It doesn't get there @_@
any ideas?

and yes I am sure there is an assignment in my code, for example, here:

Code:

RBNode* RedBlackTree::Delete(RBNode* z)
{
	RBNode *y, *x;

	if (z->left == this->nil || z->right == this->nil)
		y = z;
	else
		y = TreeSuccessor(z);
	if (y->left != this->nil)
		x = y->left;
	else
		x = y->right;
	x->parent = y->parent;
	if (y->parent == this->nil)
	{
		this->root = x;
	}
	else if (y == y->parent->left)
	{
		y->parent->left = x;
	}
	else
		y->parent->right = x;
	if (y != z)
	{
		y->CopyTo(z);
	}
	if (y->color == BLACK)
		this->DeleteFixup(x);
	return y;
}

Even though the pointers reffer to derived classes (such as BookNode) it still has to invoke the RBNode:perator = since the refferences declared as RBNode... (right?)