if (!parse_variables (lexer, dataset_dict (ds), &v, &nv, PV_NONE))
goto done;
- if (!lex_match (lexer, '('))
- {
- lex_error (lexer, _("expecting `('"));
- goto done;
- }
+ if (!lex_force_match (lexer, '('))
+ goto done;
for (i = 0; i < nv; i++)
var_clear_missing_values (v[i]);