switched to namespace first, PSR-0 as a fallback

src/Node/SpacelessNode.php

@@ -1,11 +1,41 @@
 <?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_Spaceless');
+use Twig\Compiler;
 
-if (\false) {
-    class SpacelessNode extends \Twig_Node_Spaceless
+/**
+ * Represents a spaceless node.
+ *
+ * It removes spaces between HTML tags.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class SpacelessNode extends Node implements NodeOutputInterface
+{
+    public function __construct(Node $body, $lineno, $tag = 'spaceless')
     {
+        parent::__construct(['body' => $body], [], $lineno, $tag);
+    }
+
+    public function compile(Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("ob_start();\n")
+            ->subcompile($this->getNode('body'))
+            ->write("echo trim(preg_replace('/>\s+</', '><', ob_get_clean()));\n")
+        ;
     }
 }
+
+class_alias('Twig\Node\SpacelessNode', 'Twig_Node_Spaceless');