TemplateParser::extractEscapingModifier() - Code Metrics - Inspection of "[TASK] Refactor to remove duplicated escaping modi..." - TYPO3/Fluid - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Push — master ( e7fdda...fc5ac3 )

by Marc
created 2017-07-28 22:47 UTC
TemplateParser::extractEscapingModifier() A

↳ Parent: TemplateParser
Complexity

Conditions	4
Paths	4
Size

Total Lines	17
Code Lines	11
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	4
eloc	11
nc	4
nop	1
dl	0
loc	17
rs	9.2
c	0
b	0
f	0
<?php
namespace TYPO3Fluid\Fluid\Core\Parser;

/*
 * This file belongs to the package "TYPO3 Fluid".
 * See LICENSE.txt that was shipped with this package.
 */

use TYPO3Fluid\Fluid\Core\Compiler\StopCompilingException;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\ExpressionNodeInterface;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ArrayNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\NodeInterface;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\NumericNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ObjectAccessorNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\RootNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\TextNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ViewHelperNode;
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;

/**
 * Template parser building up an object syntax tree
 */
class TemplateParser
{

    /**
     * The following two constants are used for tracking whether we are currently
     * parsing ViewHelper arguments or not. This is used to parse arrays only as
     * ViewHelper argument.
     */
    const CONTEXT_INSIDE_VIEWHELPER_ARGUMENTS = 1;
    const CONTEXT_OUTSIDE_VIEWHELPER_ARGUMENTS = 2;

    /**
     * Whether or not the escaping interceptors are active
     *
     * @var boolean
     */
    protected $escapingEnabled = true;

    /**
     * @var Configuration
     */
    protected $configuration;

    /**
     * @var array
     */
    protected $settings;

    /**
     * @var RenderingContextInterface
     */
    protected $renderingContext;

    /**
     * @var integer
     */
    protected $pointerLineNumber = 1;

    /**
     * @var integer
     */
    protected $pointerLineCharacter = 1;

    /**
     * @var string
     */
    protected $pointerTemplateCode = null;

    /**
     * @var ParsedTemplateInterface[]
     */
    protected $parsedTemplates = [];

    /**
     * @param RenderingContextInterface $renderingContext
     * @return void
     */
    public function setRenderingContext(RenderingContextInterface $renderingContext)
    {
        $this->renderingContext = $renderingContext;
        $this->configuration = $renderingContext->buildParserConfiguration();
    }

    /**
     * Returns an array of current line number, character in line and reference template code;
     * for extraction when catching parser-related Exceptions during parsing.
     *
     * @return array
     */
    public function getCurrentParsingPointers()
    {
        return [$this->pointerLineNumber, $this->pointerLineCharacter, $this->pointerTemplateCode];
    }

    /**
     * @return boolean
     */
    public function isEscapingEnabled()
    {
        return $this->escapingEnabled;
    }

    /**
     * @param boolean $escapingEnabled
     * @return void
     */
    public function setEscapingEnabled($escapingEnabled)
    {
        $this->escapingEnabled = (boolean) $escapingEnabled;
    }

    /**
     * Parses a given template string and returns a parsed template object.
     *
     * The resulting ParsedTemplate can then be rendered by calling evaluate() on it.
     *
     * Normally, you should use a subclass of AbstractTemplateView instead of calling the
     * TemplateParser directly.
     *
     * @param string $templateString The template to parse as a string
     * @param string|null $templateIdentifier If the template has an identifying string it can be passed here to improve error reporting.
     * @return ParsingState Parsed template
     * @throws Exception
     */
    public function parse($templateString, $templateIdentifier = null)
    {
        if (!is_string($templateString)) {
            throw new Exception('Parse requires a template string as argument, ' . gettype($templateString) . ' given.', 1224237899);
        }
        try {
            $this->reset();

            $templateString = $this->preProcessTemplateSource($templateString);

            $splitTemplate = $this->splitTemplateAtDynamicTags($templateString);
            $parsingState = $this->buildObjectTree($splitTemplate, self::CONTEXT_OUTSIDE_VIEWHELPER_ARGUMENTS);
        } catch (Exception $error) {
            throw $this->createParsingRelatedExceptionWithContext($error, $templateIdentifier);
        }
        $this->parsedTemplates[$templateIdentifier] = $parsingState;
        return $parsingState;
    }

    /**
     * @param \Exception $error
     * @param string $templateIdentifier
     * @throws \Exception
     */
    public function createParsingRelatedExceptionWithContext(\Exception $error, $templateIdentifier)
    {
        list ($line, $character, $templateCode) = $this->getCurrentParsingPointers();
        $exceptionClass = get_class($error);
        return new $exceptionClass(
            sprintf(
                'Fluid parse error in template %s, line %d at character %d. Error: %s (error code %d). Template source chunk: %s',
                $templateIdentifier,
                $line,
                $character,
                $error->getMessage(),
                $error->getCode(),
                $templateCode
            ),
            $error->getCode(),
            $error
        );
    }

    /**
     * @param string $templateIdentifier
     * @param \Closure $templateSourceClosure Closure which returns the template source if needed
     * @return ParsedTemplateInterface
     */
    public function getOrParseAndStoreTemplate($templateIdentifier, $templateSourceClosure)
    {
        $compiler = $this->renderingContext->getTemplateCompiler();
        if (isset($this->parsedTemplates[$templateIdentifier])) {
            $parsedTemplate = $this->parsedTemplates[$templateIdentifier];
        } elseif ($compiler->has($templateIdentifier)) {
            $parsedTemplate = $compiler->get($templateIdentifier);
        } else {
            $parsedTemplate = $this->parse(
                $templateSourceClosure($this, $this->renderingContext->getTemplatePaths()),
                $templateIdentifier
            );
            $parsedTemplate->setIdentifier($templateIdentifier);
            $this->parsedTemplates[$templateIdentifier] = $parsedTemplate;
            if ($parsedTemplate->isCompilable()) {
                try {
                    $compiler->store($templateIdentifier, $parsedTemplate);
                } catch (StopCompilingException $stop) {
                    $parsedTemplate->setCompilable(false);
                    return $parsedTemplate;
                }
            }
        }
        return $parsedTemplate;
    }

    /**
     * Pre-process the template source, making all registered TemplateProcessors
     * do what they need to do with the template source before it is parsed.
     *
     * @param string $templateSource
     * @return string
     */
    protected function preProcessTemplateSource($templateSource)
    {
        foreach ($this->renderingContext->getTemplateProcessors() as $templateProcessor) {
            $templateSource = $templateProcessor->preProcessSource($templateSource);
        }
        return $templateSource;
    }

    /**
     * Resets the parser to its default values.
     *
     * @return void
     */
    protected function reset()
    {
        $this->escapingEnabled = true;
        $this->pointerLineNumber = 1;
        $this->pointerLineCharacter = 1;
    }

    /**
     * Splits the template string on all dynamic tags found.
     *
     * @param string $templateString Template string to split.
     * @return array Splitted template
     */
    protected function splitTemplateAtDynamicTags($templateString)
    {
        return preg_split(Patterns::$SPLIT_PATTERN_TEMPLATE_DYNAMICTAGS, $templateString, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
    }

    /**
     * Build object tree from the split template
     *
     * @param array $splitTemplate The split template, so that every tag with a namespace declaration is already a seperate array element.
     * @param integer $context one of the CONTEXT_* constants, defining whether we are inside or outside of ViewHelper arguments currently.
     * @return ParsingState
     * @throws Exception
     */
    protected function buildObjectTree(array $splitTemplate, $context)
    {
        $state = $this->getParsingState();
        $previousBlock = '';

        foreach ($splitTemplate as $templateElement) {
            if ($context === self::CONTEXT_OUTSIDE_VIEWHELPER_ARGUMENTS) {
                // Store a neat reference to the outermost chunk of Fluid template code.
                // Don't store the reference if parsing ViewHelper arguments object tree;
                // we want the reference code to contain *all* of the ViewHelper call.
                $this->pointerTemplateCode = $templateElement;
            }
            $this->pointerLineNumber += substr_count($templateElement, PHP_EOL);
            $this->pointerLineCharacter = strlen(substr($previousBlock, strrpos($previousBlock, PHP_EOL))) + 1;
            $previousBlock = $templateElement;
            $matchedVariables = [];

            if (preg_match(Patterns::$SCAN_PATTERN_TEMPLATE_VIEWHELPERTAG, $templateElement, $matchedVariables) > 0) {
                if ($this->openingViewHelperTagHandler(
                    $state,
                    $matchedVariables['NamespaceIdentifier'],
                    $matchedVariables['MethodIdentifier'],
                    $matchedVariables['Attributes'],
                    ($matchedVariables['Selfclosing'] === '' ? false : true),
                    $templateElement
                )) {
                    continue;
                }
            } elseif (preg_match(Patterns::$SCAN_PATTERN_TEMPLATE_CLOSINGVIEWHELPERTAG, $templateElement, $matchedVariables) > 0) {
                if ($this->closingViewHelperTagHandler(
                    $state,
                    $matchedVariables['NamespaceIdentifier'],
                    $matchedVariables['MethodIdentifier']
                )) {
                    continue;
                }
            }
            $this->textAndShorthandSyntaxHandler($state, $templateElement, $context);
        }

        if ($state->countNodeStack() !== 1) {
            throw new Exception('Not all tags were closed!', 1238169398);
        }
        return $state;
    }
    /**
     * Handles an opening or self-closing view helper tag.
     *
     * @param ParsingState $state Current parsing state
     * @param string $namespaceIdentifier Namespace identifier - being looked up in $this->namespaces
     * @param string $methodIdentifier Method identifier
     * @param string $arguments Arguments string, not yet parsed
     * @param boolean $selfclosing true, if the tag is a self-closing tag.
     * @param string $templateElement The template code containing the ViewHelper call
     * @return NodeInterface|null
     */
    protected function openingViewHelperTagHandler(ParsingState $state, $namespaceIdentifier, $methodIdentifier, $arguments, $selfclosing, $templateElement)
    {
        $viewHelperNode = $this->initializeViewHelperAndAddItToStack(
            $state,
            $namespaceIdentifier,
            $methodIdentifier,
            $this->parseArguments($arguments)
        );

        if ($viewHelperNode) {
            $viewHelperNode->setPointerTemplateCode($templateElement);
            if ($selfclosing === true) {
                $state->popNodeFromStack();
                $this->callInterceptor($viewHelperNode, InterceptorInterface::INTERCEPT_CLOSING_VIEWHELPER, $state);
                // This needs to be called here because closingViewHelperTagHandler() is not triggered for self-closing tags
                $state->getNodeFromStack()->addChildNode($viewHelperNode);
            }
        }

        return $viewHelperNode;
    }

    /**
     * Initialize the given ViewHelper and adds it to the current node and to
     * the stack.
     *
     * @param ParsingState $state Current parsing state
     * @param string $namespaceIdentifier Namespace identifier - being looked up in $this->namespaces
     * @param string $methodIdentifier Method identifier
     * @param array $argumentsObjectTree Arguments object tree
     * @return null|NodeInterface An instance of ViewHelperNode if identity was valid - NULL if the namespace/identity was not registered
     * @throws Exception
     */
    protected function initializeViewHelperAndAddItToStack(ParsingState $state, $namespaceIdentifier, $methodIdentifier, $argumentsObjectTree)
    {
        $viewHelperResolver = $this->renderingContext->getViewHelperResolver();
        if (!$viewHelperResolver->isNamespaceValid($namespaceIdentifier)) {
            return null;
        }
        $currentViewHelperNode = new ViewHelperNode(
            $this->renderingContext,
            $namespaceIdentifier,
            $methodIdentifier,
            $argumentsObjectTree,
            $state
        );

        $this->callInterceptor($currentViewHelperNode, InterceptorInterface::INTERCEPT_OPENING_VIEWHELPER, $state);
        $viewHelper = $currentViewHelperNode->getUninitializedViewHelper();
        $viewHelper::postParseEvent($currentViewHelperNode, $argumentsObjectTree, $state->getVariableContainer());
        $state->pushNodeToStack($currentViewHelperNode);

        return $currentViewHelperNode;
    }

    /**
     * Handles a closing view helper tag
     *
     * @param ParsingState $state The current parsing state
     * @param string $namespaceIdentifier Namespace identifier for the closing tag.
     * @param string $methodIdentifier Method identifier.
     * @return boolean whether the viewHelper was found and added to the stack or not
     * @throws Exception
     */
    protected function closingViewHelperTagHandler(ParsingState $state, $namespaceIdentifier, $methodIdentifier)
    {
        $viewHelperResolver = $this->renderingContext->getViewHelperResolver();
        if (!$viewHelperResolver->isNamespaceValid($namespaceIdentifier)) {
            return false;
        }
        $lastStackElement = $state->popNodeFromStack();
        if (!($lastStackElement instanceof ViewHelperNode)) {
            throw new Exception('You closed a templating tag which you never opened!', 1224485838);
        }
        $actualViewHelperClassName = $viewHelperResolver->resolveViewHelperClassName($namespaceIdentifier, $methodIdentifier);
        $expectedViewHelperClassName = $lastStackElement->getViewHelperClassName();
        if ($actualViewHelperClassName !== $expectedViewHelperClassName) {
            throw new Exception(
                'Templating tags not properly nested. Expected: ' . $expectedViewHelperClassName . '; Actual: ' .
                $actualViewHelperClassName,
                1224485398
            );
        }
        $this->callInterceptor($lastStackElement, InterceptorInterface::INTERCEPT_CLOSING_VIEWHELPER, $state);
        $state->getNodeFromStack()->addChildNode($lastStackElement);

        return true;
    }

    /**
     * Handles the appearance of an object accessor (like {posts.author.email}).
     * Creates a new instance of \TYPO3Fluid\Fluid\ObjectAccessorNode.
     *
     * Handles ViewHelpers as well which are in the shorthand syntax.
     *
     * @param ParsingState $state The current parsing state
     * @param string $objectAccessorString String which identifies which objects to fetch
     * @param string $delimiter
     * @param string $viewHelperString
     * @param string $additionalViewHelpersString
     * @return void
     */
    protected function objectAccessorHandler(ParsingState $state, $objectAccessorString, $delimiter, $viewHelperString, $additionalViewHelpersString)
    {
        $viewHelperString .= $additionalViewHelpersString;
        $numberOfViewHelpers = 0;

        // The following post-processing handles a case when there is only a ViewHelper, and no Object Accessor.
        // Resolves bug #5107.
        if (strlen($delimiter) === 0 && strlen($viewHelperString) > 0) {
            $viewHelperString = $objectAccessorString . $viewHelperString;
            $objectAccessorString = '';
        }

        // ViewHelpers
        $matches = [];
        if (strlen($viewHelperString) > 0 && preg_match_all(Patterns::$SPLIT_PATTERN_SHORTHANDSYNTAX_VIEWHELPER, $viewHelperString, $matches, PREG_SET_ORDER) > 0) {
            // The last ViewHelper has to be added first for correct chaining.
            foreach (array_reverse($matches) as $singleMatch) {
                if (strlen($singleMatch['ViewHelperArguments']) > 0) {
                    $arguments = $this->recursiveArrayHandler($singleMatch['ViewHelperArguments']);
                } else {
                    $arguments = [];
                }
                $viewHelperNode = $this->initializeViewHelperAndAddItToStack($state, $singleMatch['NamespaceIdentifier'], $singleMatch['MethodIdentifier'], $arguments);
class A
{
    function getObject()
    {
        return null;
    }

}

$a = new A();
$object = $a->getObject();
                if ($viewHelperNode) {
                    $numberOfViewHelpers++;
                }
            }
        }

        // Object Accessor
        if (strlen($objectAccessorString) > 0) {
            $node = new ObjectAccessorNode($objectAccessorString);
            $this->callInterceptor($node, InterceptorInterface::INTERCEPT_OBJECTACCESSOR, $state);
            $state->getNodeFromStack()->addChildNode($node);
        }

        // Close ViewHelper Tags if needed.
        for ($i = 0; $i < $numberOfViewHelpers; $i++) {
            $node = $state->popNodeFromStack();
            $this->callInterceptor($node, InterceptorInterface::INTERCEPT_CLOSING_VIEWHELPER, $state);
            $state->getNodeFromStack()->addChildNode($node);
        }
    }

    /**
     * Call all interceptors registered for a given interception point.
     *
     * @param NodeInterface $node The syntax tree node which can be modified by the interceptors.
     * @param integer $interceptionPoint the interception point. One of the \TYPO3Fluid\Fluid\Core\Parser\InterceptorInterface::INTERCEPT_* constants.
     * @param ParsingState $state the parsing state
     * @return void
     */
    protected function callInterceptor(NodeInterface & $node, $interceptionPoint, ParsingState $state)
    {
        if ($this->configuration === null) {
            return;
        }
        if ($this->escapingEnabled) {
            /** @var $interceptor InterceptorInterface */
            foreach ($this->configuration->getEscapingInterceptors($interceptionPoint) as $interceptor) {
                $node = $interceptor->process($node, $interceptionPoint, $state);
            }
        }

        /** @var $interceptor InterceptorInterface */
        foreach ($this->configuration->getInterceptors($interceptionPoint) as $interceptor) {
            $node = $interceptor->process($node, $interceptionPoint, $state);
        }
    }

    /**
     * Parse arguments of a given tag, and build up the Arguments Object Tree
     * for each argument.
     * Returns an associative array, where the key is the name of the argument,
     * and the value is a single Argument Object Tree.
     *
     * @param string $argumentsString All arguments as string
     * @return array An associative array of objects, where the key is the argument name.
     */
    protected function parseArguments($argumentsString)
    {
        $argumentsObjectTree = [];
        $matches = [];
        if (preg_match_all(Patterns::$SPLIT_PATTERN_TAGARGUMENTS, $argumentsString, $matches, PREG_SET_ORDER) > 0) {
            $escapingEnabledBackup = $this->escapingEnabled;
            $this->escapingEnabled = false;
            foreach ($matches as $singleMatch) {
                $argument = $singleMatch['Argument'];
                $value = $this->unquoteString($singleMatch['ValueQuoted']);
                $argumentsObjectTree[$argument] = $this->buildArgumentObjectTree($value);
            }
            $this->escapingEnabled = $escapingEnabledBackup;
        }
        return $argumentsObjectTree;
    }

    /**
     * Build up an argument object tree for the string in $argumentString.
     * This builds up the tree for a single argument value.
     *
     * This method also does some performance optimizations, so in case
     * no { or < is found, then we just return a TextNode.
     *
     * @param string $argumentString
     * @return SyntaxTree\NodeInterface the corresponding argument object tree.
     */
    protected function buildArgumentObjectTree($argumentString)
    {
        if (strpos($argumentString, '{') === false && strpos($argumentString, '<') === false) {
            if (is_numeric($argumentString)) {
                return new NumericNode($argumentString);
            }
            return new TextNode($argumentString);
        }
        $splitArgument = $this->splitTemplateAtDynamicTags($argumentString);
        $rootNode = $this->buildObjectTree($splitArgument, self::CONTEXT_INSIDE_VIEWHELPER_ARGUMENTS)->getRootNode();
        return $rootNode;
    }

    /**
     * Removes escapings from a given argument string and trims the outermost
     * quotes.
     *
     * This method is meant as a helper for regular expression results.
     *
     * @param string $quotedValue Value to unquote
     * @return string Unquoted value
     */
    public function unquoteString($quotedValue)
    {
        $value = $quotedValue;
        if ($quotedValue{0} === '"') {
            $value = str_replace('\\"', '"', preg_replace('/(^"|"$)/', '', $quotedValue));
        } elseif ($quotedValue{0} === '\'') {
            $value = str_replace("\\'", "'", preg_replace('/(^\'|\'$)/', '', $quotedValue));
        }
        return str_replace('\\\\', '\\', $value);
    }

    /**
     * Handler for everything which is not a ViewHelperNode.
     *
     * This includes Text, array syntax, and object accessor syntax.
     *
     * @param ParsingState $state Current parsing state
     * @param string $text Text to process
     * @param integer $context one of the CONTEXT_* constants, defining whether we are inside or outside of ViewHelper arguments currently.
     * @return void
     */
    protected function textAndShorthandSyntaxHandler(ParsingState $state, $text, $context)
    {
        $sections = preg_split(Patterns::$SPLIT_PATTERN_SHORTHANDSYNTAX, $text, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
        foreach ($sections as $section) {
            $matchedVariables = [];
            $expressionNode = null;
            if (preg_match(Patterns::$SCAN_PATTERN_SHORTHANDSYNTAX_OBJECTACCESSORS, $section, $matchedVariables) > 0) {
                $this->objectAccessorHandler(
                    $state,
                    $matchedVariables['Object'],
                    $matchedVariables['Delimiter'],
                    (isset($matchedVariables['ViewHelper']) ? $matchedVariables['ViewHelper'] : ''),
                    (isset($matchedVariables['AdditionalViewHelpers']) ? $matchedVariables['AdditionalViewHelpers'] : '')
                );
            } elseif ($context === self::CONTEXT_INSIDE_VIEWHELPER_ARGUMENTS
                && preg_match(Patterns::$SCAN_PATTERN_SHORTHANDSYNTAX_ARRAYS, $section, $matchedVariables) > 0
            ) {
                // We only match arrays if we are INSIDE viewhelper arguments
                $this->arrayHandler($state, $this->recursiveArrayHandler($matchedVariables['Array']));
            } else {
                // We ask custom ExpressionNode instances from ViewHelperResolver
                // if any match our expression:
                foreach ($this->renderingContext->getExpressionNodeTypes() as $expressionNodeTypeClassName) {
                    $detectionExpression = $expressionNodeTypeClassName::$detectionExpression;
                    $matchedVariables = [];
                    preg_match_all($detectionExpression, $section, $matchedVariables, PREG_SET_ORDER);
                    if (is_array($matchedVariables) === true) {
                        foreach ($matchedVariables as $matchedVariableSet) {
                            $expressionStartPosition = strpos($section, $matchedVariableSet[0]);
                            /** @var ExpressionNodeInterface $expressionNode */
                            $expressionNode = new $expressionNodeTypeClassName($matchedVariableSet[0], $matchedVariableSet, $state);
                            if ($expressionStartPosition > 0) {
                                $state->getNodeFromStack()->addChildNode(new TextNode(substr($section, 0, $expressionStartPosition)));
                            }
                            $state->getNodeFromStack()->addChildNode($expressionNode);
                            $expressionEndPosition = $expressionStartPosition + strlen($matchedVariableSet[0]);
                            if ($expressionEndPosition < strlen($section)) {
                                $this->textAndShorthandSyntaxHandler($state, substr($section, $expressionEndPosition), $context);
                                break;
                            }
                        }
                    }
                }

                if ($expressionNode) {
                    // Trigger initial parse-time evaluation to allow the node to manipulate the rendering context.
                    $expressionNode->evaluate($this->renderingContext);
                } else {
                    // As fallback we simply render the expression back as template content.
                    $this->textHandler($state, $section);
                }
            }
        }
    }

    /**
     * Handler for array syntax. This creates the array object recursively and
     * adds it to the current node.
     *
     * @param ParsingState $state The current parsing state
     * @param NodeInterface[] $arrayText The array as string.
     * @return void
     */
    protected function arrayHandler(ParsingState $state, $arrayText)
    {
        $arrayNode = new ArrayNode($arrayText);
        $state->getNodeFromStack()->addChildNode($arrayNode);
    }

    /**
     * Recursive function which takes the string representation of an array and
     * builds an object tree from it.
     *
     * Deals with the following value types:
     * - Numbers (Integers and Floats)
     * - Strings
     * - Variables
     * - sub-arrays
     *
     * @param string $arrayText Array text
     * @return NodeInterface[] the array node built up
     * @throws Exception
     */
    protected function recursiveArrayHandler($arrayText)
    {
        $matches = [];
        $arrayToBuild = [];
        if (preg_match_all(Patterns::$SPLIT_PATTERN_SHORTHANDSYNTAX_ARRAY_PARTS, $arrayText, $matches, PREG_SET_ORDER)) {
            foreach ($matches as $singleMatch) {
                $arrayKey = $this->unquoteString($singleMatch['Key']);
                if (!empty($singleMatch['VariableIdentifier'])) {
                    $arrayToBuild[$arrayKey] = new ObjectAccessorNode($singleMatch['VariableIdentifier']);
                } elseif (array_key_exists('Number', $singleMatch) && (!empty($singleMatch['Number']) || $singleMatch['Number'] === '0')) {
                    $arrayToBuild[$arrayKey] = (float)$singleMatch['Number'];
                } elseif ((array_key_exists('QuotedString', $singleMatch) && !empty($singleMatch['QuotedString']))) {
                    $argumentString = $this->unquoteString($singleMatch['QuotedString']);
                    $arrayToBuild[$arrayKey] = $this->buildArgumentObjectTree($argumentString);
                } elseif (array_key_exists('Subarray', $singleMatch) && !empty($singleMatch['Subarray'])) {
                    $arrayToBuild[$arrayKey] = new ArrayNode($this->recursiveArrayHandler($singleMatch['Subarray']));
                }
            }
        }
        return $arrayToBuild;
    }

    /**
     * Text node handler
     *
     * @param ParsingState $state
     * @param string $text
     * @return void
     */
    protected function textHandler(ParsingState $state, $text)
    {
        $node = new TextNode($text);
        $this->callInterceptor($node, InterceptorInterface::INTERCEPT_TEXT, $state);
        $state->getNodeFromStack()->addChildNode($node);
    }

    /**
     * @return ParsingState
     */
    protected function getParsingState()
    {
        $rootNode = new RootNode();
        $variableProvider = $this->renderingContext->getVariableProvider();
        $state = new ParsingState();
        $state->setRootNode($rootNode);
        $state->pushNodeToStack($rootNode);
        $state->setVariableProvider($variableProvider->getScopeCopy($variableProvider->getAll()));
        return $state;
    }
}

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TemplateParser::extractEscapingModifier() A

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