pub unsafe extern "C" fn faiss_IndexIVF_merge_from(
    index: *mut FaissIndexIVF,
    other: *mut FaissIndexIVF,
    add_id: idx_t
) -> c_int
Expand description

moves the entries from another dataset to self. On output, other is empty. add_id is added to all moved ids (for sequential ids, this would be this->ntotal