Method Empty

cpp/src/arrow/acero/asof_join_node.cc:545–550

  row_index_t GetLatestRow() const { return latest_ref_row_; }

  bool Empty() const {
    // cannot be empty if ref row is >0 -- can avoid slow queue lock
    // below
    if (latest_ref_row_ > 0) return false;
    return queue_.Empty();
  }

  // true when the queue is empty and, when memo may have future entries (the case of a
  // positive tolerance), when the memo is empty.