expect example

final class SandboxTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $stream = $this->parser->getStream();
        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
        $body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);

        // in a sandbox tag, only include tags are allowed         if (!$body instanceof IncludeNode) {
            foreach ($body as $node) {
                if ($node instanceof TextNode && ctype_space($node->getAttribute('data'))) {
                    continue;
                }

                if (!$node instanceof IncludeNode) {
                    

        $module = $this->parser->parse($stream, [$this, 'decideBlockEnd'], true);

        // override the parent with the correct one         if ($fakeParentToken === $parentToken) {
            $module->setNode('parent', $parent);
        }

        $this->parser->embedTemplate($module);

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

        return new EmbedNode($module->getTemplateName(), $module->getAttribute('index'), $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
    }

    public function decideBlockEnd(Token $token): bool
    {
        return $token->test('endembed');
    }

    public function getTag(): string
    {
        

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);
                    $else = $this->parser->subparse([$this, 'decideIfEnd']);
                    break;

                

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();
            }

            $targets[$name] = $alias;

            

    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $name = $this->parser->getVarName();

        $ref = new TempNameExpression($name, $lineno);
        $ref->setAttribute('always_defined', true);

        $filter = $this->parser->getExpressionParser()->parseFilterExpressionRaw($ref, $this->getTag());

        $this->parser->getStream()->expect(Token::BLOCK_END_TYPE);
        $body = $this->parser->subparse([$this, 'decideApplyEnd'], true);
        $this->parser->getStream()->expect(Token::BLOCK_END_TYPE);

        return new Node([
            new SetNode(true, $ref, $body, $lineno, $this->getTag()),
            new PrintNode($filter, $lineno, $this->getTag()),
        ]);
    }

    public function decideApplyEnd(Token $token): bool
    {
        

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';
    }
}

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());
    }

    public function decideWithEnd(Token $token): bool
    {
        return $token->test('endwith');
    }

if ($this->parser->getStream()->nextIf(Token::NAME_TYPE, 'only')) {
                $only = true;
            }
        } else {
            $resources = new ArrayExpression([], $stream->getCurrent()->getLine());
            do {
                $resources->addElement($this->parser->getExpressionParser()->parseExpression());
            } while (!$stream->test(Token::BLOCK_END_TYPE));
        }

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

        return new FormThemeNode($form, $resources, $lineno, $this->getTag(), $only);
    }

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

final class DumpTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $values = null;
        if (!$this->parser->getStream()->test(Token::BLOCK_END_TYPE)) {
            $values = $this->parser->getExpressionParser()->parseMultitargetExpression();
        }
        $this->parser->getStream()->expect(Token::BLOCK_END_TYPE);

        return new DumpNode($this->parser->getVarName(), $values, $token->getLine(), $this->getTag());
    }

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

final class BlockTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $stream = $this->parser->getStream();
        $name = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();
        if ($this->parser->hasBlock($name)) {
            throw new SyntaxError(sprintf("The block '%s' has already been defined line %d.", $name, $this->parser->getBlock($name)->getTemplateLine()), $stream->getCurrent()->getLine(), $stream->getSourceContext());
        }
        $this->parser->setBlock($name, $block = new BlockNode($name, new Node([]), $lineno));
        $this->parser->pushLocalScope();
        $this->parser->pushBlockStack($name);

        if ($stream->nextIf(/* Token::BLOCK_END_TYPE */ 3)) {
            $body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
            if ($token = $stream->nextIf(/* Token::NAME_TYPE */ 5)) {
                $value = $token->getValue();

                

/** * Evaluates an expression, discarding the returned value. * * @internal */
final class DoTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $expr = $this->parser->getExpressionParser()->parseExpression();

        $this->parser->getStream()->expect(/* Token::BLOCK_END_TYPE */ 3);

        return new DoNode($expr, $token->getLine(), $this->getTag());
    }

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

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

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

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

        $ignoreMissing = false;
        if ($stream->nextIf(/* Token::NAME_TYPE */ 5, 'ignore')) {
            $stream->expect(/* Token::NAME_TYPE */ 5, 'missing');

            $ignoreMissing = true;
        }

        $variables = null;
        if ($stream->nextIf(/* Token::NAME_TYPE */ 5, 'with')) {
            $variables = $this->parser->getExpressionParser()->parseExpression();
        }

        $only = false;
        if ($stream->nextIf(/* Token::NAME_TYPE */ 5, 'only')) {
            

$this->stopwatchIsAvailable = $stopwatchIsAvailable;
    }

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

        // {% stopwatch 'bar' %}         $name = $this->parser->getExpressionParser()->parseExpression();

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

        // {% endstopwatch %}         $body = $this->parser->subparse($this->decideStopwatchEnd(...), true);
        $stream->expect(Token::BLOCK_END_TYPE);

        if ($this->stopwatchIsAvailable) {
            return new StopwatchNode($name, $body, new AssignNameExpression($this->parser->getVarName(), $token->getLine()), $lineno, $this->getTag());
        }

        return $body;
    }

    

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);

        

final class MacroTokenParser extends AbstractTokenParser
{
    public function parse(Token $token): Node
    {
        $lineno = $token->getLine();
        $stream = $this->parser->getStream();
        $name = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();

        $arguments = $this->parser->getExpressionParser()->parseArguments(true, true);

        $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
        $this->parser->pushLocalScope();
        $body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
        if ($token = $stream->nextIf(/* Token::NAME_TYPE */ 5)) {
            $value = $token->getValue();

            if ($value != $name) {
                throw new SyntaxError(sprintf('Expected endmacro for macro "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext());
            }