lib.rs

impl XGBTree {
    fn get_leaf_index(&self, feats: &FVec) -> usize {
        let mut nid: usize = 0;
        let mut node = &self.nodes[nid];
        while !node.is_leaf() {
            let split_index = node.split_index();
            if feats.is_misssing(split_index) {
                nid = node.cdefault();
            } else {
                let split_cond = node.split_cond();
                if feats.fvalue(split_index) < split_cond {
                    nid = node.cleft();
                } else {
                    nid = node.cright();
                }
            }
            node = &self.nodes[nid];
        }
        return nid;
    }
}