let to_tuple {
                       file_name = file_name;
                       start =
                         {
                           line = start_line;
                           bol = start_bol;
                           off = start_off
                         };
                       stop =
                         { line = stop_line; bol = stop_bol; off = stop_off };
                       ghost = ghost
                     } =
          (file_name, start_line, start_bol, start_off, stop_line, stop_bol,
           stop_off, ghost)