vendor/twig/twig/src/Parser.php line 603
<?php/** This file is part of Twig.** (c) Fabien Potencier* (c) Armin Ronacher** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Twig;use Twig\Error\SyntaxError;use Twig\ExpressionParser\ExpressionParserInterface;use Twig\ExpressionParser\ExpressionParsers;use Twig\ExpressionParser\ExpressionParserType;use Twig\ExpressionParser\InfixExpressionParserInterface;use Twig\ExpressionParser\Prefix\LiteralExpressionParser;use Twig\ExpressionParser\PrefixExpressionParserInterface;use Twig\Node\BlockNode;use Twig\Node\BlockReferenceNode;use Twig\Node\BodyNode;use Twig\Node\EmptyNode;use Twig\Node\Expression\AbstractExpression;use Twig\Node\Expression\Variable\AssignTemplateVariable;use Twig\Node\Expression\Variable\TemplateVariable;use Twig\Node\MacroNode;use Twig\Node\ModuleNode;use Twig\Node\Node;use Twig\Node\NodeCaptureInterface;use Twig\Node\NodeOutputInterface;use Twig\Node\Nodes;use Twig\Node\PrintNode;use Twig\Node\TextNode;use Twig\TokenParser\TokenParserInterface;use Twig\Util\ReflectionCallable;/*** @author Fabien Potencier <fabien@symfony.com>*/class Parser{private $stack = [];private ?\WeakMap $expressionRefs = null;private $stream;private $parent;private $visitors;private $expressionParser;private $blocks;private $blockStack;private $macros;private $importedSymbols;private $traits;private $embeddedTemplates = [];private $varNameSalt = 0;private $ignoreUnknownTwigCallables = false;private ExpressionParsers $parsers;public function __construct(private Environment $env,) {$this->parsers = $env->getExpressionParsers();}public function getEnvironment(): Environment{return $this->env;}public function getVarName(): string{trigger_deprecation('twig/twig', '3.15', 'The "%s()" method is deprecated.', __METHOD__);return \sprintf('__internal_parse_%d', $this->varNameSalt++);}public function parse(TokenStream $stream, $test = null, bool $dropNeedle = false): ModuleNode{$vars = get_object_vars($this);unset($vars['stack'], $vars['env'], $vars['handlers'], $vars['visitors'], $vars['expressionParser'], $vars['reservedMacroNames'], $vars['varNameSalt']);$this->stack[] = $vars;// node visitorsif (null === $this->visitors) {$this->visitors = $this->env->getNodeVisitors();}$this->stream = $stream;$this->parent = null;$this->blocks = [];$this->macros = [];$this->traits = [];$this->blockStack = [];$this->importedSymbols = [[]];$this->embeddedTemplates = [];$this->expressionRefs = new \WeakMap();try {$body = $this->subparse($test, $dropNeedle);if (null !== $this->parent && null === $body = $this->filterBodyNodes($body)) {$body = new EmptyNode();}} catch (SyntaxError $e) {if (!$e->getSourceContext()) {$e->setSourceContext($this->stream->getSourceContext());}if (!$e->getTemplateLine()) {$e->setTemplateLine($this->getCurrentToken()->getLine());}throw $e;} finally {$this->expressionRefs = null;}$node = new ModuleNode(new BodyNode([$body]),$this->parent,$this->blocks ? new Nodes($this->blocks) : new EmptyNode(),$this->macros ? new Nodes($this->macros) : new EmptyNode(),$this->traits ? new Nodes($this->traits) : new EmptyNode(),$this->embeddedTemplates ? new Nodes($this->embeddedTemplates) : new EmptyNode(),$stream->getSourceContext(),);$traverser = new NodeTraverser($this->env, $this->visitors);/*** @var ModuleNode $node*/$node = $traverser->traverse($node);// restore previous stack so previous parse() call can resume workingforeach (array_pop($this->stack) as $key => $val) {$this->$key = $val;}return $node;}public function shouldIgnoreUnknownTwigCallables(): bool{return $this->ignoreUnknownTwigCallables;}public function subparseIgnoreUnknownTwigCallables($test, bool $dropNeedle = false): void{$previous = $this->ignoreUnknownTwigCallables;$this->ignoreUnknownTwigCallables = true;try {$this->subparse($test, $dropNeedle);} finally {$this->ignoreUnknownTwigCallables = $previous;}}public function subparse($test, bool $dropNeedle = false): Node{$lineno = $this->getCurrentToken()->getLine();$rv = [];while (!$this->stream->isEOF()) {switch (true) {case $this->stream->getCurrent()->test(Token::TEXT_TYPE):$token = $this->stream->next();$rv[] = new TextNode($token->getValue(), $token->getLine());break;case $this->stream->getCurrent()->test(Token::VAR_START_TYPE):$token = $this->stream->next();$expr = $this->parseExpression();$this->stream->expect(Token::VAR_END_TYPE);$rv[] = new PrintNode($expr, $token->getLine());break;case $this->stream->getCurrent()->test(Token::BLOCK_START_TYPE):$this->stream->next();$token = $this->getCurrentToken();if (!$token->test(Token::NAME_TYPE)) {throw new SyntaxError('A block must start with a tag name.', $token->getLine(), $this->stream->getSourceContext());}if (null !== $test && $test($token)) {if ($dropNeedle) {$this->stream->next();}if (1 === \count($rv)) {return $rv[0];}return new Nodes($rv, $lineno);}if (!$subparser = $this->env->getTokenParser($token->getValue())) {if (null !== $test) {$e = new SyntaxError(\sprintf('Unexpected "%s" tag', $token->getValue()), $token->getLine(), $this->stream->getSourceContext());$callable = (new ReflectionCallable(new TwigTest('decision', $test)))->getCallable();if (\is_array($callable) && $callable[0] instanceof TokenParserInterface) {$e->appendMessage(\sprintf(' (expecting closing tag for the "%s" tag defined near line %s).', $callable[0]->getTag(), $lineno));}} else {$e = new SyntaxError(\sprintf('Unknown "%s" tag.', $token->getValue()), $token->getLine(), $this->stream->getSourceContext());$e->addSuggestions($token->getValue(), array_keys($this->env->getTokenParsers()));}throw $e;}$this->stream->next();$subparser->setParser($this);$node = $subparser->parse($token);if (!$node) {trigger_deprecation('twig/twig', '3.12', 'Returning "null" from "%s" is deprecated and forbidden by "TokenParserInterface".', $subparser::class);} else {$node->setNodeTag($subparser->getTag());$rv[] = $node;}break;default:throw new SyntaxError('The lexer or the parser ended up in an unsupported state.', $this->getCurrentToken()->getLine(), $this->stream->getSourceContext());}}if (1 === \count($rv)) {return $rv[0];}return new Nodes($rv, $lineno);}public function getBlockStack(): array{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return $this->blockStack;}/*** @return string|null*/public function peekBlockStack(){return $this->blockStack[\count($this->blockStack) - 1] ?? null;}public function popBlockStack(): void{array_pop($this->blockStack);}public function pushBlockStack($name): void{$this->blockStack[] = $name;}public function hasBlock(string $name): bool{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return isset($this->blocks[$name]);}public function getBlock(string $name): Node{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return $this->blocks[$name];}public function setBlock(string $name, BlockNode $value): void{if (isset($this->blocks[$name])) {throw new SyntaxError(\sprintf("The block '%s' has already been defined line %d.", $name, $this->blocks[$name]->getTemplateLine()), $this->getCurrentToken()->getLine(), $this->blocks[$name]->getSourceContext());}$this->blocks[$name] = new BodyNode([$value], [], $value->getTemplateLine());}public function hasMacro(string $name): bool{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return isset($this->macros[$name]);}public function setMacro(string $name, MacroNode $node): void{$this->macros[$name] = $node;}public function addTrait($trait): void{$this->traits[] = $trait;}public function hasTraits(): bool{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return \count($this->traits) > 0;}/*** @return void*/public function embedTemplate(ModuleNode $template){$template->setIndex(mt_rand());$this->embeddedTemplates[] = $template;}public function addImportedSymbol(string $type, string $alias, ?string $name = null, AbstractExpression|AssignTemplateVariable|null $internalRef = null): void{if ($internalRef && !$internalRef instanceof AssignTemplateVariable) {trigger_deprecation('twig/twig', '3.15', 'Not passing a "%s" instance as an internal reference is deprecated ("%s" given).', __METHOD__, AssignTemplateVariable::class, $internalRef::class);$internalRef = new AssignTemplateVariable(new TemplateVariable($internalRef->getAttribute('name'), $internalRef->getTemplateLine()), $internalRef->getAttribute('global'));}$this->importedSymbols[0][$type][$alias] = ['name' => $name, 'node' => $internalRef];}/*** @return array{name: string, node: AssignTemplateVariable|null}|null*/public function getImportedSymbol(string $type, string $alias){// if the symbol does not exist in the current scope (0), try in the main/global scope (last index)return $this->importedSymbols[0][$type][$alias] ?? ($this->importedSymbols[\count($this->importedSymbols) - 1][$type][$alias] ?? null);}public function isMainScope(): bool{return 1 === \count($this->importedSymbols);}public function pushLocalScope(): void{array_unshift($this->importedSymbols, []);}public function popLocalScope(): void{array_shift($this->importedSymbols);}/*** @deprecated since Twig 3.21*/public function getExpressionParser(): ExpressionParser{trigger_deprecation('twig/twig', '3.21', 'Method "%s()" is deprecated, use "parseExpression()" instead.', __METHOD__);if (null === $this->expressionParser) {$this->expressionParser = new ExpressionParser($this, $this->env);}return $this->expressionParser;}public function parseExpression(int $precedence = 0): AbstractExpression{$token = $this->getCurrentToken();if ($token->test(Token::OPERATOR_TYPE) && $ep = $this->parsers->getByName(PrefixExpressionParserInterface::class, $token->getValue())) {$this->getStream()->next();$expr = $ep->parse($this, $token);$this->checkPrecedenceDeprecations($ep, $expr);} else {$expr = $this->parsers->getByClass(LiteralExpressionParser::class)->parse($this, $token);}$token = $this->getCurrentToken();while ($token->test(Token::OPERATOR_TYPE) && ($ep = $this->parsers->getByName(InfixExpressionParserInterface::class, $token->getValue())) && $ep->getPrecedence() >= $precedence) {$this->getStream()->next();$expr = $ep->parse($this, $expr, $token);$this->checkPrecedenceDeprecations($ep, $expr);$token = $this->getCurrentToken();}return $expr;}public function getParent(): ?Node{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return $this->parent;}/*** @return bool*/public function hasInheritance(){return $this->parent || 0 < \count($this->traits);}public function setParent(?Node $parent): void{if (null === $parent) {trigger_deprecation('twig/twig', '3.12', 'Passing "null" to "%s()" is deprecated.', __METHOD__);}if (null !== $this->parent) {throw new SyntaxError('Multiple extends tags are forbidden.', $parent->getTemplateLine(), $parent->getSourceContext());}$this->parent = $parent;}public function getStream(): TokenStream{return $this->stream;}public function getCurrentToken(): Token{return $this->stream->getCurrent();}public function getFunction(string $name, int $line): TwigFunction{try {$function = $this->env->getFunction($name);} catch (SyntaxError $e) {if (!$this->shouldIgnoreUnknownTwigCallables()) {throw $e;}$function = null;}if (!$function) {if ($this->shouldIgnoreUnknownTwigCallables()) {return new TwigFunction($name, fn () => '');}$e = new SyntaxError(\sprintf('Unknown "%s" function.', $name), $line, $this->stream->getSourceContext());$e->addSuggestions($name, array_keys($this->env->getFunctions()));throw $e;}if ($function->isDeprecated()) {$src = $this->stream->getSourceContext();$function->triggerDeprecation($src->getPath() ?: $src->getName(), $line);}return $function;}public function getFilter(string $name, int $line): TwigFilter{try {$filter = $this->env->getFilter($name);} catch (SyntaxError $e) {if (!$this->shouldIgnoreUnknownTwigCallables()) {throw $e;}$filter = null;}if (!$filter) {if ($this->shouldIgnoreUnknownTwigCallables()) {return new TwigFilter($name, fn () => '');}$e = new SyntaxError(\sprintf('Unknown "%s" filter.', $name), $line, $this->stream->getSourceContext());$e->addSuggestions($name, array_keys($this->env->getFilters()));throw $e;}if ($filter->isDeprecated()) {$src = $this->stream->getSourceContext();$filter->triggerDeprecation($src->getPath() ?: $src->getName(), $line);}return $filter;}public function getTest(int $line): TwigTest{$name = $this->stream->expect(Token::NAME_TYPE)->getValue();if ($this->stream->test(Token::NAME_TYPE)) {// try 2-words tests$name = $name.' '.$this->getCurrentToken()->getValue();if ($test = $this->env->getTest($name)) {$this->stream->next();}} else {$test = $this->env->getTest($name);}if (!$test) {if ($this->shouldIgnoreUnknownTwigCallables()) {return new TwigTest($name, fn () => '');}$e = new SyntaxError(\sprintf('Unknown "%s" test.', $name), $line, $this->stream->getSourceContext());$e->addSuggestions($name, array_keys($this->env->getTests()));throw $e;}if ($test->isDeprecated()) {$src = $this->stream->getSourceContext();$test->triggerDeprecation($src->getPath() ?: $src->getName(), $this->stream->getCurrent()->getLine());}return $test;}private function filterBodyNodes(Node $node, bool $nested = false): ?Node{// check that the body does not contain non-empty output nodesif (($node instanceof TextNode && !ctype_space($node->getAttribute('data')))|| (!$node instanceof TextNode && !$node instanceof BlockReferenceNode && $node instanceof NodeOutputInterface)) {if (str_contains((string) $node, \chr(0xEF).\chr(0xBB).\chr(0xBF))) {$t = substr($node->getAttribute('data'), 3);if ('' === $t || ctype_space($t)) {// bypass empty nodes starting with a BOMreturn null;}}throw new SyntaxError('A template that extends another one cannot include content outside Twig blocks. Did you forget to put the content inside a {% block %} tag?', $node->getTemplateLine(), $this->stream->getSourceContext());}// bypass nodes that "capture" the outputif ($node instanceof NodeCaptureInterface) {// a "block" tag in such a node will serve as a block definition AND be displayed in place as wellreturn $node;}// "block" tags that are not captured (see above) are only used for defining// the content of the block. In such a case, nesting it does not work as// expected as the definition is not part of the default template code flow.if ($nested && $node instanceof BlockReferenceNode) {throw new SyntaxError('A block definition cannot be nested under non-capturing nodes.', $node->getTemplateLine(), $this->stream->getSourceContext());}if ($node instanceof NodeOutputInterface) {return null;}// here, $nested means "being at the root level of a child template"// we need to discard the wrapping "Node" for the "body" node// Node::class !== \get_class($node) should be removed in Twig 4.0$nested = $nested || (Node::class !== $node::class && !$node instanceof Nodes);foreach ($node as $k => $n) {if (null !== $n && null === $this->filterBodyNodes($n, $nested)) {$node->removeNode($k);}}return $node;}private function checkPrecedenceDeprecations(ExpressionParserInterface $expressionParser, AbstractExpression $expr){$this->expressionRefs[$expr] = $expressionParser;$precedenceChanges = $this->parsers->getPrecedenceChanges();// Check that the all nodes that are between the 2 precedences have explicit parenthesesif (!isset($precedenceChanges[$expressionParser])) {return;}if ($expr->hasExplicitParentheses()) {return;}if ($expressionParser instanceof PrefixExpressionParserInterface) {/** @var AbstractExpression $node */$node = $expr->getNode('node');foreach ($precedenceChanges as $ep => $changes) {if (!\in_array($expressionParser, $changes, true)) {continue;}if (isset($this->expressionRefs[$node]) && $ep === $this->expressionRefs[$node]) {$change = $expressionParser->getPrecedenceChange();trigger_deprecation($change->getPackage(), $change->getVersion(), \sprintf('As the "%s" %s operator will change its precedence in the next major version, add explicit parentheses to avoid behavior change in "%s" at line %d.', $expressionParser->getName(), ExpressionParserType::getType($expressionParser)->value, $this->getStream()->getSourceContext()->getName(), $node->getTemplateLine()));}}}foreach ($precedenceChanges[$expressionParser] as $ep) {foreach ($expr as $node) {/** @var AbstractExpression $node */if (isset($this->expressionRefs[$node]) && $ep === $this->expressionRefs[$node] && !$node->hasExplicitParentheses()) {$change = $ep->getPrecedenceChange();trigger_deprecation($change->getPackage(), $change->getVersion(), \sprintf('As the "%s" %s operator will change its precedence in the next major version, add explicit parentheses to avoid behavior change in "%s" at line %d.', $ep->getName(), ExpressionParserType::getType($ep)->value, $this->getStream()->getSourceContext()->getName(), $node->getTemplateLine()));}}}}}