$sfnln_fn = string\match($param_name, '/[(][^)]*[)]/');
ifThenElse($fn == '()',
    $val_fn_ln = string\replace($param_name, ' ()', '');
,
    $sfnln_ln = string\match($param_name, '/[^)]*[)][ ]*/');
    ifThenElse($sfnln_ln != '',
        $sfnln_ln = string\substring($param_name, string\length($sfnln_ln));
        $sfnln_fn = string\substring($sfnln_fn, 1, string\length($sfnln_fn) - 2);
        $val_fn_ln = string\concatenate($sfnln_fn, ' ', $sfnln_ln);
    ,
        $val_fn_ln = $param_name;
    )
);