diff -r 000000000000 -r 7f95f8617b0b vendor/twig-extensions/lib/Twig/Extensions/Grammar/Boolean.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/twig-extensions/lib/Twig/Extensions/Grammar/Boolean.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extensions_Grammar_Boolean extends Twig_Extensions_Grammar
+{
+    public function __toString()
+    {
+        return sprintf('<%s:boolean>', $this->name);
+    }
+
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::NAME_TYPE, array('true', 'false'));
+
+        return new Twig_Node_Expression_Constant('true' === $token->getValue() ? true : false, $token->getLine());
+    }
+}