Method next

consumer/src/iterators.rs:33–43

(&mut self)

    type Item = NodeId;

    fn next(&mut self) -> Option<Self::Item> {
        match self {
            Self::Normal {
                parent_id,
                children,
            } => children
                .next()
                .map(|child| parent_id.with_same_tree(*child)),
            Self::Graft(id) => id.take(),
        }
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        let len = self.len();