parseExpression example

class IncludeTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $expr = $this->parser->getExpressionParser()->parseExpression();

        list($variables, $only, $ignoreMissing) = $this->parseArguments();

        return new IncludeNode($expr, $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
    }

    protected function parseArguments()
    {
        $stream = $this->parser->getStream();

        $ignoreMissing = false;
        

protected $parser;

    public function __construct(private readonly TemplateFinder $finder)
    {
    }

    /** * @return Node */
    public function parse(Token $token)
    {
        $expr = $this->parser->getExpressionParser()->parseExpression();

        [$variables, $only, $ignoreMissing] = $this->parseArguments();

        // resolves parent template         if ($expr->hasAttribute('value')) {
            // set pointer to next value (contains the template file name)             $parent = $this->finder->find($expr->getAttribute('value'), $ignoreMissing);

            $expr->setAttribute('value', $parent);

            return new IncludeNode($expr, $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
        }

$stream = $this->parser->getStream();

        if ($this->parser->peekBlockStack()) {
            throw new SyntaxError('Cannot use "extend" in a block.', $token->getLine(), $stream->getSourceContext());
        } elseif (!$this->parser->isMainScope()) {
            throw new SyntaxError('Cannot use "extend" in a macro.', $token->getLine(), $stream->getSourceContext());
        }

        if (null !== $this->parser->getParent()) {
            throw new SyntaxError('Multiple extends tags are forbidden.', $token->getLine(), $stream->getSourceContext());
        }
        $this->parser->setParent($this->parser->getExpressionParser()->parseExpression());

        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);

        return new Node();
    }

    public function getTag(): string
    {
        return 'extends';
    }
}

final class IfTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $expr = $this->parser->getExpressionParser()->parseExpression();
        $stream = $this->parser->getStream();
        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
        $body = $this->parser->subparse([$this, 'decideIfFork']);
        $tests = [$expr, $body];
        $else = null;

        $end = false;
        while (!$end) {
            switch ($stream->next()->getValue()) {
                case 'else':
                    $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
                    

final class FormThemeTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $stream = $this->parser->getStream();

        $form = $this->parser->getExpressionParser()->parseExpression();
        $only = false;

        if ($this->parser->getStream()->test(Token::NAME_TYPE, 'with')) {
            $this->parser->getStream()->next();
            $resources = $this->parser->getExpressionParser()->parseExpression();

            if ($this->parser->getStream()->nextIf(Token::NAME_TYPE, 'only')) {
                $only = true;
            }
        } else {
            $resources = new ArrayExpression([], $stream->getCurrent()->getLine());
            

/** * Imports macros. * * {% from 'forms.html' import forms %} * * @internal */
final class FromTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $macro = $this->parser->getExpressionParser()->parseExpression();
        $stream = $this->parser->getStream();
        $stream->expect(/* Token::NAME_TYPE */ 5, 'import');

        $targets = [];
        do {
            $name = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();

            $alias = $name;
            if ($stream->nextIf('as')) {
                $alias = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();
            }

            

while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
            $op = $this->binaryOperators[$token->getValue()];
            $this->parser->getStream()->next();

            if ('is not' === $token->getValue()) {
                $expr = $this->parseNotTestExpression($expr);
            } elseif ('is' === $token->getValue()) {
                $expr = $this->parseTestExpression($expr);
            } elseif (isset($op['callable'])) {
                $expr = $op['callable']($this->parser, $expr);
            } else {
                $expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence'], true);
                $class = $op['class'];
                $expr = new $class($expr, $expr1, $token->getLine());
            }

            $token = $this->parser->getCurrentToken();
        }

        if (0 === $precedence) {
            return $this->parseConditionalExpression($expr);
        }

        

    private function getOptions(TokenStream $stream): array
    {
        if ($stream->test(Token::STRING_TYPE)) {
            return [
                'scopes' => [TemplateScopeDetector::DEFAULT_SCOPE],
                'template' => $stream->next()->getValue(),
            ];
        }

        $expression = $this->parser->getExpressionParser()->parseExpression();
        $options = $this->convertExpressionToArray($expression);

        if (!isset($options['template']) || !\is_string($options['template'])) {
            throw AdapterException::missingExtendsTemplate($stream->getSourceContext()->getName());
        }

        if (!isset($options['scopes'])) {
            $options['scopes'] = [TemplateScopeDetector::DEFAULT_SCOPE];
        }

        if (\is_string($options['scopes'])) {
            

  public function parse(Token $token) {
    $lineno = $token->getLine();
    $stream = $this->parser->getStream();
    $body = NULL;
    $options = NULL;
    $count = NULL;
    $plural = NULL;

    if (!$stream->test(Token::BLOCK_END_TYPE) && $stream->test(Token::STRING_TYPE)) {
      $body = $this->parser->getExpressionParser()->parseExpression();
    }
    if (!$stream->test(Token::BLOCK_END_TYPE) && $stream->test(Token::NAME_TYPE, 'with')) {
      $stream->next();
      $options = $this->parser->getExpressionParser()->parseExpression();
    }
    if (!$body) {
      $stream->expect(Token::BLOCK_END_TYPE);
      $body = $this->parser->subparse([$this, 'decideForFork']);
      if ('plural' === $stream->next()->getValue()) {
        $count = $this->parser->getExpressionParser()->parseExpression();
        $stream->expect(Token::BLOCK_END_TYPE);
        

final class WithTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $stream = $this->parser->getStream();

        $variables = null;
        $only = false;
        if (!$stream->test(/* Token::BLOCK_END_TYPE */ 3)) {
            $variables = $this->parser->getExpressionParser()->parseExpression();
            $only = (bool) $stream->nextIf(/* Token::NAME_TYPE */ 5, 'only');
        }

        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);

        $body = $this->parser->subparse([$this, 'decideWithEnd'], true);

        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);

        return new WithNode($body, $variables, $only, $token->getLine(), $this->getTag());
    }

    

use Twig\TokenParser\AbstractTokenParser;

#[Package('core')] final class ReturnNodeTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): ReturnNode
    {
        $stream = $this->parser->getStream();
        $nodes = [];

        if (!$stream->test(Token::BLOCK_END_TYPE)) {
            $nodes['expr'] = $this->parser->getExpressionParser()->parseExpression();
        }

        $stream->expect(Token::BLOCK_END_TYPE);

        return new ReturnNode($nodes, [], $token->getLine(), $this->getTag());
    }

    public function getTag(): string
    {
        return 'return';
    }
}

$lineno = $this->getCurrentToken()->getLine();
        $rv = [];
        while (!$this->stream->isEOF()) {
            switch ($this->getCurrentToken()->getType()) {
                case /* Token::TEXT_TYPE */ 0:
                    $token = $this->stream->next();
                    $rv[] = new TextNode($token->getValue(), $token->getLine());
                    break;

                case /* Token::VAR_START_TYPE */ 2:
                    $token = $this->stream->next();
                    $expr = $this->expressionParser->parseExpression();
                    $this->stream->expect(/* Token::VAR_END_TYPE */ 4);
                    $rv[] = new PrintNode($expr, $token->getLine());
                    break;

                case /* Token::BLOCK_START_TYPE */ 1:
                    $this->stream->next();
                    $token = $this->getCurrentToken();

                    if (/* Token::NAME_TYPE */ 5 !== $token->getType()) {
                        throw new SyntaxError('A block must start with a tag name.', $token->getLine(), $this->stream->getSourceContext());
                    }

                    

$lineno = $token->getLine();
        $stream = $this->parser->getStream();

        $count = null;
        $vars = new ArrayExpression([], $lineno);
        $domain = null;
        $locale = null;
        if (!$stream->test(Token::BLOCK_END_TYPE)) {
            if ($stream->test('count')) {
                // {% trans count 5 %}                 $stream->next();
                $count = $this->parser->getExpressionParser()->parseExpression();
            }

            if ($stream->test('with')) {
                // {% trans with vars %}                 $stream->next();
                $vars = $this->parser->getExpressionParser()->parseExpression();
            }

            if ($stream->test('from')) {
                // {% trans from "messages" %}                 $stream->next();
                

final class ForTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $stream = $this->parser->getStream();
        $targets = $this->parser->getExpressionParser()->parseAssignmentExpression();
        $stream->expect(/* Token::OPERATOR_TYPE */ 8, 'in');
        $seq = $this->parser->getExpressionParser()->parseExpression();

        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
        $body = $this->parser->subparse([$this, 'decideForFork']);
        if ('else' == $stream->next()->getValue()) {
            $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
            $else = $this->parser->subparse([$this, 'decideForEnd'], true);
        } else {
            $else = null;
        }
        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);

        

$this->doParse($stream, $names);
    }

    /** * @throws SyntaxError */
    private function doParse(TokenStream $stream, ?array $names = []): Node\Node
    {
        $this->stream = $stream;
        $this->names = $names;

        $node = $this->parseExpression();
        if (!$stream->isEOF()) {
            throw new SyntaxError(sprintf('Unexpected token "%s" of value "%s".', $stream->current->type, $stream->current->value), $stream->current->cursor, $stream->getExpression());
        }

        unset($this->stream, $this->names);

        return $node;
    }

    /** * @return Node\Node */