class RemoveCheckToStringNodeVisitor

Same name and namespace in other branches
  1. 11.x core/lib/Drupal/Core/Template/RemoveCheckToStringNodeVisitor.php \Drupal\Core\Template\RemoveCheckToStringNodeVisitor

Defines a TwigNodeVisitor that replaces CheckToStringNodes.

Twig 3.14.1 resulted in a performance regression in Drupal due to checking if __toString is an allowed method on objects. __toString is allowed on all objects when Drupal's default SandboxPolicy is active. Therefore, Twig's SandboxExtension checks are unnecessary.

Hierarchy

Expanded class hierarchy of RemoveCheckToStringNodeVisitor

File

core/lib/Drupal/Core/Template/RemoveCheckToStringNodeVisitor.php, line 20

Namespace

Drupal\Core\Template
View on git.drupalcode.org
View source 
final class RemoveCheckToStringNodeVisitor implements NodeVisitorInterface {
  
  /**
   * {@inheritdoc}
   */
  public function enterNode(Node $node, Environment $env) : Node {
    if ($node instanceof CheckToStringNode) {
      // Replace CheckToStringNode with the faster equivalent, __toString is an
      // allowed method so any checking of __toString on a per-object basis is
      // performance overhead.
      $new = new TwigSimpleCheckToStringNode($node->getNode('expr'));
      // @todo https://www.drupal.org/project/drupal/issues/3488584 Update for
      //   Twig 4 as the spread attribute has been removed there.
      if ($node->hasAttribute('spread')) {
        $new->setAttribute('spread', $node->getAttribute('spread'));
      }
      return $new;
    }
    return $node;
  }
  
  /**
   * {@inheritdoc}
   */
  public function leaveNode(Node $node, Environment $env) : ?Node {
    return $node;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getPriority() {
    // Runs after sandbox visitor.
    return 1;
  }

}

Members

Title Modifiers Object type Summary
RemoveCheckToStringNodeVisitor::enterNode public function
RemoveCheckToStringNodeVisitor::getPriority public function
RemoveCheckToStringNodeVisitor::leaveNode public function

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