1 files changed, 24 insertions, 0 deletions

diff --git a/inc/Twig/Extensions/Grammar/Boolean.php b/inc/Twig/Extensions/Grammar/Boolean.php
new file mode 100644
index 00000000..c0048090
--- /dev/null
+++ b/inc/Twig/Extensions/Grammar/Boolean.php
@@ -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());
+    }
+}