Upgrade Twig library

inc/lib/Twig/Extension/StringLoader.php

@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_StringLoader extends Twig_Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return array(
+            new Twig_SimpleFunction('template_from_string', 'twig_template_from_string', array('needs_environment' => true)),
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getName()
+    {
+        return 'string_loader';
+    }
+}
+
+/**
+ * Loads a template from a string.
+ *
+ * <pre>
+ * {{ include(template_from_string("Hello {{ name }}")) }}
+ * </pre>
+ *
+ * @param Twig_Environment $env      A Twig_Environment instance
+ * @param string           $template A template as a string
+ *
+ * @return Twig_Template A Twig_Template instance
+ */
+function twig_template_from_string(Twig_Environment $env, $template)
+{
+    static $loader;
+
+    if (null === $loader) {
+        $loader = new Twig_Loader_String();
+    }
+
+    $current = $env->getLoader();
+    $env->setLoader($loader);
+    try {
+        $template = $env->loadTemplate($template);
+    } catch (Exception $e) {
+        $env->setLoader($current);
+
+        throw $e;
+    }
+    $env->setLoader($current);
+
+    return $template;
+}