AVL_XCHILD
was_child = AVL_XCHILD(node);
*cookie = (void *)((uintptr_t)parent | AVL_XCHILD(node));
was_child = AVL_XCHILD(node);
int which_child = AVL_XCHILD(node);
which_child = AVL_XCHILD(node);
parent->avl_child[AVL_XCHILD(node)] = node;
parent->avl_child[AVL_XCHILD(delete)] = delete;
which_child = AVL_XCHILD(delete);
which_child = AVL_XCHILD(node);