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

vendor/symfony/dependency-injection/Compiler/RepeatedPass.php

@@ -0,0 +1,88 @@
+<?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\Compiler;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * A pass that might be run repeatedly.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class RepeatedPass implements CompilerPassInterface
+{
+    /**
+     * @var bool
+     */
+    private $repeat = false;
+
+    /**
+     * @var RepeatablePassInterface[]
+     */
+    private $passes;
+
+    /**
+     * Constructor.
+     *
+     * @param RepeatablePassInterface[] $passes An array of RepeatablePassInterface objects
+     *
+     * @throws InvalidArgumentException when the passes don't implement RepeatablePassInterface
+     */
+    public function __construct(array $passes)
+    {
+        foreach ($passes as $pass) {
+            if (!$pass instanceof RepeatablePassInterface) {
+                throw new InvalidArgumentException('$passes must be an array of RepeatablePassInterface.');
+            }
+
+            $pass->setRepeatedPass($this);
+        }
+
+        $this->passes = $passes;
+    }
+
+    /**
+     * Process the repeatable passes that run more than once.
+     *
+     * @param ContainerBuilder $container
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $this->repeat = false;
+        foreach ($this->passes as $pass) {
+            $pass->process($container);
+        }
+
+        if ($this->repeat) {
+            $this->process($container);
+        }
+    }
+
+    /**
+     * Sets if the pass should repeat.
+     */
+    public function setRepeat()
+    {
+        $this->repeat = true;
+    }
+
+    /**
+     * Returns the passes.
+     *
+     * @return RepeatablePassInterface[] An array of RepeatablePassInterface objects
+     */
+    public function getPasses()
+    {
+        return $this->passes;
+    }
+}