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   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\Extension;
  13  
  14  use Twig\NodeVisitor\NodeVisitorInterface;
  15  use Twig\TokenParser\TokenParserInterface;
  16  use Twig\TwigFilter;
  17  use Twig\TwigFunction;
  18  use Twig\TwigTest;
  19  
  20  /**
  21   * Interface implemented by extension classes.
  22   *
  23   * @author Fabien Potencier <fabien@symfony.com>
  24   */
  25  interface ExtensionInterface
  26  {
  27      /**
  28       * Returns the token parser instances to add to the existing list.
  29       *
  30       * @return TokenParserInterface[]
  31       */
  32      public function getTokenParsers();
  33  
  34      /**
  35       * Returns the node visitor instances to add to the existing list.
  36       *
  37       * @return NodeVisitorInterface[]
  38       */
  39      public function getNodeVisitors();
  40  
  41      /**
  42       * Returns a list of filters to add to the existing list.
  43       *
  44       * @return TwigFilter[]
  45       */
  46      public function getFilters();
  47  
  48      /**
  49       * Returns a list of tests to add to the existing list.
  50       *
  51       * @return TwigTest[]
  52       */
  53      public function getTests();
  54  
  55      /**
  56       * Returns a list of functions to add to the existing list.
  57       *
  58       * @return TwigFunction[]
  59       */
  60      public function getFunctions();
  61  
  62      /**
  63       * Returns a list of operators to add to the existing list.
  64       *
  65       * @return array<array> First array of unary operators, second array of binary operators
  66       */
  67      public function getOperators();
  68  }
  69  
  70  class_alias('Twig\Extension\ExtensionInterface', 'Twig_ExtensionInterface');
  71  
  72  // Ensure that the aliased name is loaded to keep BC for classes implementing the typehint with the old aliased name.
  73  class_exists('Twig\Environment');