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/vendor/twig/twig/src/NodeVisitor/ -> AbstractNodeVisitor.php (source)

   1  <?php
   2  
   3  /*
   4   * This file is part of Twig.
   5   *
   6   * (c) Fabien Potencier
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Twig\NodeVisitor;
  13  
  14  use Twig\Environment;
  15  use Twig\Node\Node;
  16  
  17  /**
  18   * Used to make node visitors compatible with Twig 1.x and 2.x.
  19   *
  20   * To be removed in Twig 3.1.
  21   *
  22   * @author Fabien Potencier <fabien@symfony.com>
  23   */
  24  abstract class AbstractNodeVisitor implements NodeVisitorInterface
  25  {
  26      final public function enterNode(Node $node, Environment $env)
  27      {
  28          return $this->doEnterNode($node, $env);
  29      }
  30  
  31      final public function leaveNode(Node $node, Environment $env)
  32      {
  33          return $this->doLeaveNode($node, $env);
  34      }
  35  
  36      /**
  37       * Called before child nodes are visited.
  38       *
  39       * @return Node The modified node
  40       */
  41      abstract protected function doEnterNode(Node $node, Environment $env);
  42  
  43      /**
  44       * Called after child nodes are visited.
  45       *
  46       * @return Node|null The modified node or null if the node must be removed
  47       */
  48      abstract protected function doLeaveNode(Node $node, Environment $env);
  49  }
  50  
  51  class_alias('Twig\NodeVisitor\AbstractNodeVisitor', 'Twig_BaseNodeVisitor');


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