assign_rets
assign_rets(data_number, $1);
assign_rets(data_number, $2);
assign_rets(data_string, $1);
assign_rets(data_byte, (void *) $1);
assign_rets(data_err, NULL);
assign_rets(data_ok, NULL);
assign_rets(data_null, NULL);
assign_rets(data_nonnull, NULL);
assign_rets(data_var, $1);
assign_rets(data_ref, $1);