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ZeedFramework/library/Twig/Node/Expression/Test/Constant.php

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+<?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.
+ */
+
+/**
+ * Checks if a variable is the exact same value as a constant.
+ *
+ * <pre>
+ *  {% if post.status is constant('Post::PUBLISHED') %}
+ *    the status attribute is exactly the same as Post::PUBLISHED
+ *  {% endif %}
+ * </pre>
+ *
+ * @package twig
+ * @author  Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Constant extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' === constant(')
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw('))')
+        ;
+    }
+}