switched to namespace first, PSR-0 as a fallback

src/Node/ForLoopNode.php

@@ -1,11 +1,56 @@
 <?php
 
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Twig\Node;
 
-class_exists('Twig_Node_ForLoop');
+use Twig\Compiler;
 
-if (\false) {
-    class ForLoopNode extends \Twig_Node_ForLoop
+/**
+ * Internal node used by the for node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ForLoopNode extends Node
+{
+    public function __construct($lineno, $tag = null)
     {
+        parent::__construct([], ['with_loop' => false, 'ifexpr' => false, 'else' => false], $lineno, $tag);
+    }
+
+    public function compile(Compiler $compiler)
+    {
+        if ($this->getAttribute('else')) {
+            $compiler->write("\$context['_iterated'] = true;\n");
+        }
+
+        if ($this->getAttribute('with_loop')) {
+            $compiler
+                ->write("++\$context['loop']['index0'];\n")
+                ->write("++\$context['loop']['index'];\n")
+                ->write("\$context['loop']['first'] = false;\n")
+            ;
+
+            if (!$this->getAttribute('ifexpr')) {
+                $compiler
+                    ->write("if (isset(\$context['loop']['length'])) {\n")
+                    ->indent()
+                    ->write("--\$context['loop']['revindex0'];\n")
+                    ->write("--\$context['loop']['revindex'];\n")
+                    ->write("\$context['loop']['last'] = 0 === \$context['loop']['revindex0'];\n")
+                    ->outdent()
+                    ->write("}\n")
+                ;
+            }
+        }
     }
 }
+
+class_alias('Twig\Node\ForLoopNode', 'Twig_Node_ForLoop');