added support for an array of templates to the "extends" tag

CHANGELOG

@@ -1,7 +1,7 @@
 * 1.2.0
 
  * added a way to ignore a missing template when using the "include" tag ({% include "foo" ignore missing %})
- * added support for an array of templates to the "include" tag ({% include ['foo', 'bar'] %})
+ * added support for an array of templates to the "include" and "extends" tags ({% include ['foo', 'bar'] %})
  * added support for bitwise operators in expressions
  * added the "attribute" function to allow getting dynamic attributes on variables
  * added Twig_Loader_Chain

doc/templates.rst

@@ -401,6 +401,16 @@ the parent template::
 
     $twig->display('template.twig', array('layout' => $layout));
 
+.. versionadded:: 1.2
+    The possibility to pass an array of templates has been added in Twig 1.2.
+
+You can also provide a list of templates that are checked for existence. The
+first template that exists will be used as a parent::
+
+.. code-block:: jinja
+
+    {% extends ['layout.html', 'base_layout.html'] %}
+
 Conditional Inheritance
 ~~~~~~~~~~~~~~~~~~~~~~~
 

lib/Twig/Node/Module.php

@@ -71,7 +71,15 @@ class Twig_Node_Module extends Twig_Node
         if (null === $this->getNode('parent')) {
             $compiler->raw("false");
         } else {
-            $compiler->subcompile($this->getNode('parent'));
+            if ($this->getNode('parent') instanceof Twig_Node_Expression_Constant) {
+                $compiler->subcompile($this->getNode('parent'));
+            } else {
+                $compiler
+                    ->raw("\$this->env->resolveTemplate(")
+                    ->subcompile($this->getNode('parent'))
+                    ->raw(")")
+                ;
+            }
         }
 
         $compiler

test/Twig/Tests/Fixtures/tags/inheritance/extends_as_array.test

@@ -0,0 +1,12 @@
+--TEST--
+"extends" tag
+--TEMPLATE--
+{% extends ["foo.twig", "bar.twig"] %}
+--TEMPLATE(bar.twig)--
+{% block content %}
+foo
+{% endblock %}
+--DATA--
+return array()
+--EXPECT--
+foo

test/Twig/Tests/Node/ModuleTest.php

@@ -149,7 +149,7 @@ class __TwigTemplate_be925a7b06dda0dfdbd18a1509f7eb34 extends Twig_Template
 {
     protected function doGetParent(array \$context)
     {
-        return ((true) ? ("foo") : ("foo"));
+        return \$this->env->resolveTemplate(((true) ? ("foo") : ("foo")));
     }
 
     protected function doDisplay(array \$context, array \$blocks = array())