Function box_map_elements_reuses_allocation

datafusion/common/src/tree_node.rs:2455–2461

()

    #[test]
    fn box_map_elements_reuses_allocation() {
        let boxed = Box::new(TestTreeNode::new_leaf(42i32));
        let before: *const TestTreeNode<i32> = &*boxed;
        let out = boxed.map_elements(|n| Ok(Transformed::no(n))).unwrap();
        let after: *const TestTreeNode<i32> = &*out.data;
        assert_eq!(after, before);
    }

    #[test]
    fn arc_map_elements_reuses_allocation_when_unique() {