Function height

src/tree/binary/tree.rs:49–55

(node: Option<NonNull<Node<K, V>>>)

}

fn height<K, V>(node: Option<NonNull<Node<K, V>>>) -> usize {
    node.map_or(0, |node| unsafe {
        let lh = height(node.as_ref().left);
        let rh = height(node.as_ref().right);
        1 + std::cmp::max(lh, rh)
    })
}