1 files changed, 28 insertions, 0 deletions
diff --git a/lib/exTpl/Node.php b/lib/exTpl/Node.php
new file mode 100644
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--- /dev/null
+++ b/lib/exTpl/Node.php
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+<?php
+/*
+ * Node.php - template parser node interface and classes
+ *
+ * Copyright (c) 2013  Elmar Ludwig
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+namespace exTpl;
+
+
+/**
+ * Basic interface for nodes in the template parse tree. The only
+ * required method is "render" to render a node and its children.
+ */
+interface Node
+{
+    /**
+     * Returns a string representation of this node.
+     *
+     * @param Context $context symbol table
+     */
+    public function render(Context $context): ?string;
+}