RhodeCode

    class Red : public Node {

      friend class BidirBpGraphExtender;

    public:

      Red() {}

      Red(const Node& node) : Node(node) {

      }

      Red& operator=(const Node& node) {

        Node::operator=(node);

        return *this;

      }

      Red(Invalid) : Node(INVALID) {}

      Red& operator=(Invalid) {

        Node::operator=(INVALID);

    class Blue : public Node {

      friend class BidirBpGraphExtender;

    public:

      Blue() {}

      Blue(const Node& node) : Node(node) {

      }

      Blue& operator=(const Node& node) {

        Node::operator=(node);

        return *this;

      }

      Blue(Invalid) : Node(INVALID) {}

      Blue& operator=(Invalid) {

        Node::operator=(INVALID);