From 9117fc1ce003388fb645ed984678770333faaebf Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Tue, 1 Nov 2011 11:49:04 +0100
Subject: [PATCH] added Twig_Function_Node to allow more complex functions to have their own Node class

---
 CHANGELOG                     |    1 +
 lib/Twig/ExpressionParser.php |    9 ++++++++-
 lib/Twig/Function/Node.php    |   37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 1 deletions(-)
 create mode 100644 lib/Twig/Function/Node.php

diff --git a/CHANGELOG b/CHANGELOG
index 40b99c7..3dfa190 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,6 @@
 * 1.4.0
 
+ * added Twig_Function_Node to allow more complex functions to have their own Node class
  * added Twig_Filter_Node to allow more complex filters to have their own Node class
  * added Twig_Test_Node to allow more complex tests to have their own Node class
  * added a better error message when a template is empty but contain a BOM
diff --git a/lib/Twig/ExpressionParser.php b/lib/Twig/ExpressionParser.php
index c1e384e..af96e98 100644
--- a/lib/Twig/ExpressionParser.php
+++ b/lib/Twig/ExpressionParser.php
@@ -259,7 +259,14 @@ class Twig_ExpressionParser
                     return new Twig_Node_Expression_GetAttr($alias['node'], new Twig_Node_Expression_Constant($alias['name'], $line), $args, Twig_TemplateInterface::METHOD_CALL, $line);
                 }
 
-                return new Twig_Node_Expression_Function($name, $args, $line);
+                $functionMap = $this->parser->getEnvironment()->getFunctions();
+                if (isset($functionMap[$name]) && $functionMap[$name] instanceof Twig_Filter_Node) {
+                    $class = $functionMap[$name]->getClass();
+                } else {
+                    $class = 'Twig_Node_Expression_Function';
+                }
+
+                return new $class($name, $args, $line);
         }
     }
 
diff --git a/lib/Twig/Function/Node.php b/lib/Twig/Function/Node.php
new file mode 100644
index 0000000..a687a84
--- /dev/null
+++ b/lib/Twig/Function/Node.php
@@ -0,0 +1,37 @@
+<?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.
+ */
+
+/**
+ * Represents a template function as a node.
+ *
+ * @package    twig
+ * @author     Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Function_Node extends Twig_Filter
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
-- 
1.7.2.5