vendor/twig/twig/src/Parser.php line 58
<?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\Node\BlockNode;use Twig\Node\BlockReferenceNode;use Twig\Node\BodyNode;use Twig\Node\Expression\AbstractExpression;use Twig\Node\MacroNode;use Twig\Node\ModuleNode;use Twig\Node\Node;use Twig\Node\NodeCaptureInterface;use Twig\Node\NodeOutputInterface;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 $stream;private $parent;private $visitors;private $expressionParser;private $blocks;private $blockStack;private $macros;private $importedSymbols;private $traits;private $embeddedTemplates = [];private $varNameSalt = 0;public function __construct(private Environment $env,) {}public function getVarName(): string{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();}if (null === $this->expressionParser) {$this->expressionParser = new ExpressionParser($this, $this->env);}$this->stream = $stream;$this->parent = null;$this->blocks = [];$this->macros = [];$this->traits = [];$this->blockStack = [];$this->importedSymbols = [[]];$this->embeddedTemplates = [];try {$body = $this->subparse($test, $dropNeedle);if (null !== $this->parent && null === $body = $this->filterBodyNodes($body)) {$body = new Node();}} catch (SyntaxError $e) {if (!$e->getSourceContext()) {$e->setSourceContext($this->stream->getSourceContext());}if (!$e->getTemplateLine()) {$e->setTemplateLine($this->getCurrentToken()->getLine());}throw $e;}$node = new ModuleNode(new BodyNode([$body]), $this->parent, new Node($this->blocks), new Node($this->macros), new Node($this->traits), $this->embeddedTemplates, $stream->getSourceContext());$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 $node;}public function subparse($test, bool $dropNeedle = false): Node{$lineno = $this->getCurrentToken()->getLine();$rv = [];while (!$this->stream->isEOF()) {switch ($this->getCurrentToken()->getType()) {case Token::TEXT_TYPE:$token = $this->stream->next();$rv[] = new TextNode($token->getValue(), $token->getLine());break;case Token::VAR_START_TYPE:$token = $this->stream->next();$expr = $this->expressionParser->parseExpression();$this->stream->expect(Token::VAR_END_TYPE);$rv[] = new PrintNode($expr, $token->getLine());break;case Token::BLOCK_START_TYPE:$this->stream->next();$token = $this->getCurrentToken();if (Token::NAME_TYPE !== $token->getType()) {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 $rv[0];}return new Node($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 $rv[0];}return new Node($rv, [], $lineno);}public function getBlockStack(): array{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return $this->blockStack;}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;}public function embedTemplate(ModuleNode $template){$template->setIndex(mt_rand());$this->embeddedTemplates[] = $template;}public function addImportedSymbol(string $type, string $alias, ?string $name = null, ?AbstractExpression $node = null): void{$this->importedSymbols[0][$type][$alias] = ['name' => $name, 'node' => $node];}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);}public function getExpressionParser(): ExpressionParser{return $this->expressionParser;}public function getParent(): ?Node{trigger_deprecation('twig/twig', '3.12', 'Method "%s()" is deprecated.', __METHOD__);return $this->parent;}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();}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, $nested means "being at the root level of a child template"// we need to discard the wrapping "Node" for the "body" node$nested = $nested || Node::class !== \get_class($node);foreach ($node as $k => $n) {if (null !== $n && null === $this->filterBodyNodes($n, $nested)) {$node->removeNode($k);}}return $node;}}