ForLoop.php

<?php

/*
 * This file is part of Twig.
 *
 * (c) 2011 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Internal node used by the for node.
 *
 * @package    twig
 * @author     Fabien Potencier <fabien@symfony.com>
 */
class Twig_Node_ForLoop extends Twig_Node {
  public function __construct($lineno, $tag = null) {
    parent::__construct(array(), array(
      'with_loop' => false,
      'ifexpr' => false,
      'else' => false,
    ), $lineno, $tag);
  }

  /**
   * Compiles the node to PHP.
   *
   * @param Twig_Compiler A Twig_Compiler instance
   */
  public function compile(Twig_Compiler $compiler) {
    if ($this
      ->getAttribute('else')) {
      $compiler
        ->write("\$context['_iterated'] = true;\n");
    }
    if ($this
      ->getAttribute('with_loop')) {
      $compiler
        ->write("++\$context['loop']['index0'];\n")
        ->write("++\$context['loop']['index'];\n")
        ->write("\$context['loop']['first'] = false;\n");
      if (!$this
        ->getAttribute('ifexpr')) {
        $compiler
          ->write("if (isset(\$context['loop']['length'])) {\n")
          ->indent()
          ->write("--\$context['loop']['revindex0'];\n")
          ->write("--\$context['loop']['revindex'];\n")
          ->write("\$context['loop']['last'] = 0 === \$context['loop']['revindex0'];\n")
          ->outdent()
          ->write("}\n");
      }
    }
  }

}