diff -r 6d109e3804ac -r 9a001a04b634 Twig-1.3.0/lib/Twig/Node/Expression/Unary.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Twig-1.3.0/lib/Twig/Node/Expression/Unary.php	Tue Oct 25 23:56:28 2011 +0200
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Unary extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $node, $lineno)
+    {
+        parent::__construct(array('node' => $node), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('(');
+        $this->operator($compiler);
+        $compiler
+            ->subcompile($this->getNode('node'))
+            ->raw(')')
+        ;
+    }
+
+    abstract public function operator(Twig_Compiler $compiler);
+}