Method new

src/strings/tst.rs:248–255

(c: usize)

impl<T> Node<T> {
    fn new(c: usize) -> NonNull<Self> {
        let v = Box::new(Self {
            c,
            subtries: [None; 3],
            val: None,
        });
        Box::leak(v).into()
    }

    // test subtrie whether completely empty
    fn is_empty(&self) -> bool {