Thread: Inheritance Problem

What the hell is going on here??

Is it language bug or my brain exploded already?

I tried to compile this on many compiler but they gave me the same error code.

Code:

class Node {
protected:
  Node *next;
  Node *previous; // error: `Node*Node::previous' is protected
public:
  virtual Node *getNext(void) const { return next; }
  virtual void setNext(Node *next) { this->next = next; }
  virtual Node *getPrevious(void) const { return previous; }
  virtual void setPrevious(Node *previous) { this->previous = previous; }
};

class LinkedNode : public Node // See? LinkedNode inherits the Node!!
                               // It supposed be able to access protected members of Node!!
{
public:
  virtual void setNext(Node *next) {
    // within this context
    if(next) { next->previous = this; }
    Node::setNext(next);
  }
  virtual void setPrevious(Node *previous) {
    if(previous) { previous->next = this; }
    Node::setPrevious(previous);
  }
};