Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/dependency-injection/ExpressionLanguage.php

@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection;
+
+use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage;
+use Symfony\Component\ExpressionLanguage\ParserCache\ParserCacheInterface;
+
+/**
+ * Adds some function to the default ExpressionLanguage.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @see ExpressionLanguageProvider
+ */
+class ExpressionLanguage extends BaseExpressionLanguage
+{
+    public function __construct(ParserCacheInterface $cache = null, array $providers = array())
+    {
+        // prepend the default provider to let users override it easily
+        array_unshift($providers, new ExpressionLanguageProvider());
+
+        parent::__construct($cache, $providers);
+    }
+}