Node* syten::BinaryTree::Node< T >::r = nullptr |
Ptr to parent node, if existing.
Referenced by syten::BinaryTree::Tree< T >::first_nonfork(), syten::BinaryTree::Tree< T >::last_fork(), syten::BinaryTree::Node< T >::load(), syten::BinaryTree::Node< T >::top(), and syten::BinaryTree::Node< T >::~Node().