Excellent catch. This std::move should not have been in this code snippet. It is a copy-paste mistake, carried over from the previous code snippet of the post,

Excellent catch. This std::move should not have been in this code snippet. It is a copy-paste mistake, carried over from the previous code snippet of the post, and should have been omitted. (The `std::move` does nothing in this snippet, since `sp::get_arrow_structure` takes and lvalue reference). In the previous example with `sp::extract_arrow_structures`, which takes an rvalue reference, std::move is required and the sparrow primitive array cannot be operated upon after.