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

vendor/symfony/routing/Matcher/Dumper/DumperCollection.php

@@ -0,0 +1,159 @@
+<?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\Routing\Matcher\Dumper;
+
+/**
+ * Collection of routes.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ */
+class DumperCollection implements \IteratorAggregate
+{
+    /**
+     * @var DumperCollection|null
+     */
+    private $parent;
+
+    /**
+     * @var (DumperCollection|DumperRoute)[]
+     */
+    private $children = array();
+
+    /**
+     * @var array
+     */
+    private $attributes = array();
+
+    /**
+     * Returns the children routes and collections.
+     *
+     * @return (DumperCollection|DumperRoute)[] Array of DumperCollection|DumperRoute
+     */
+    public function all()
+    {
+        return $this->children;
+    }
+
+    /**
+     * Adds a route or collection.
+     *
+     * @param DumperRoute|DumperCollection The route or collection
+     */
+    public function add($child)
+    {
+        if ($child instanceof self) {
+            $child->setParent($this);
+        }
+        $this->children[] = $child;
+    }
+
+    /**
+     * Sets children.
+     *
+     * @param array $children The children
+     */
+    public function setAll(array $children)
+    {
+        foreach ($children as $child) {
+            if ($child instanceof self) {
+                $child->setParent($this);
+            }
+        }
+        $this->children = $children;
+    }
+
+    /**
+     * Returns an iterator over the children.
+     *
+     * @return \Iterator The iterator
+     */
+    public function getIterator()
+    {
+        return new \ArrayIterator($this->children);
+    }
+
+    /**
+     * Returns the root of the collection.
+     *
+     * @return DumperCollection The root collection
+     */
+    public function getRoot()
+    {
+        return (null !== $this->parent) ? $this->parent->getRoot() : $this;
+    }
+
+    /**
+     * Returns the parent collection.
+     *
+     * @return DumperCollection|null The parent collection or null if the collection has no parent
+     */
+    protected function getParent()
+    {
+        return $this->parent;
+    }
+
+    /**
+     * Sets the parent collection.
+     *
+     * @param DumperCollection $parent The parent collection
+     */
+    protected function setParent(DumperCollection $parent)
+    {
+        $this->parent = $parent;
+    }
+
+    /**
+     * Returns true if the attribute is defined.
+     *
+     * @param string $name The attribute name
+     *
+     * @return bool true if the attribute is defined, false otherwise
+     */
+    public function hasAttribute($name)
+    {
+        return array_key_exists($name, $this->attributes);
+    }
+
+    /**
+     * Returns an attribute by name.
+     *
+     * @param string $name    The attribute name
+     * @param mixed  $default Default value is the attribute doesn't exist
+     *
+     * @return mixed The attribute value
+     */
+    public function getAttribute($name, $default = null)
+    {
+        return $this->hasAttribute($name) ? $this->attributes[$name] : $default;
+    }
+
+    /**
+     * Sets an attribute by name.
+     *
+     * @param string $name  The attribute name
+     * @param mixed  $value The attribute value
+     */
+    public function setAttribute($name, $value)
+    {
+        $this->attributes[$name] = $value;
+    }
+
+    /**
+     * Sets multiple attributes.
+     *
+     * @param array $attributes The attributes
+     */
+    public function setAttributes($attributes)
+    {
+        $this->attributes = $attributes;
+    }
+}