FOF30\Less\Parser\Parser::tagExpression PHP Метод

    protected function tagExpression(&$value)
    {
        $s = $this->seek();
        if ($this->literal("(") && $this->expression($exp) && $this->literal(")")) {
            $value = array('exp', $exp);
            return true;
        }
        $this->seek($s);
        return false;
    }