Flow\Parser::parseAttributeExpression PHP Метод

    protected function parseAttributeExpression($node)
    {
        $token = $this->stream->getCurrentToken();
        if ($this->stream->consume(Token::OPERATOR, '.')) {
            $attr = new Expression\ConstantExpression($this->parseName()->getValue(), $token->getLine());
        } else {
            $this->stream->expect(Token::OPERATOR, '[');
            $attr = $this->parseExpression();
            $this->stream->expect(Token::OPERATOR, ']');
        }
        $args = false;
        if ($this->stream->consume(Token::OPERATOR, '(')) {
            $args = array();
            while (!$this->stream->test(Token::OPERATOR, ')')) {
                if (count($args)) {
                    $this->stream->expect(Token::OPERATOR, ',');
                }
                $args[] = $this->parseExpression();
            }
            $this->stream->expect(Token::OPERATOR, ')');
        }
        return new Expression\AttributeExpression($node, $attr, $args, $token->getLine());
    }