protected function func($name, &$func)
    {
        $s = $this->count;

        if ($this->matchChar('(')) {
            if ($name === 'alpha' && $this->argumentList($args)) {
                $func = [Type::T_FUNCTION, $name, [Type::T_STRING, '', $args]];

                return true;
            }

            if ($name !== 'expression' && ! preg_match('/^(-[a-z]+-)?calc$/', $name)) {
                $ss = $this->count;

                if ($this->argValues($args) && $this->matchChar(')')) {
                    $func = [Type::T_FUNCTION_CALL, $name, $args];

                    return true;
                }

                $this->seek($ss);
            }

            if (($this->openString(')', $str, '(') || true) &&
                $this->matchChar(')')
            ) {
                $args = [];

                if (! empty($str)) {
                    $args[] = [null, [Type::T_STRING, '', [$str]]];
                }

                $func = [Type::T_FUNCTION_CALL, $name, $args];

                return true;
            }
        }

        $this->seek($s);

        return false;
    }