ConcatBinary example

 elseif ($stream->nextIf(/* Token::INTERPOLATION_START_TYPE */ 10)) {
                $nodes[] = $this->parseExpression();
                $stream->expect(/* Token::INTERPOLATION_END_TYPE */ 11);
                $nextCanBeString = true;
            } else {
                break;
            }
        }

        $expr = array_shift($nodes);
        foreach ($nodes as $node) {
            $expr = new ConcatBinary($expr, $node, $node->getTemplateLine());
        }

        return $expr;
    }

    public function parseArrayExpression()
    {
        $stream = $this->parser->getStream();
        $stream->expect(/* Token::PUNCTUATION_TYPE */ 9, '[', 'An array element was expected');

        $node = new ArrayExpression([], $stream->getCurrent()->getLine());