diff vendor/sebastian/object-enumerator/src/Enumerator.php @ 14:1fec387a4317

Update Drupal core to 8.5.2 via Composer

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sebastian/object-enumerator/src/Enumerator.php	Mon Apr 23 09:46:53 2018 +0100
@@ -0,0 +1,85 @@
+<?php
+/*
+ * This file is part of Object Enumerator.
+ *
+ * (c) Sebastian Bergmann <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\ObjectEnumerator;
+
+use SebastianBergmann\ObjectReflector\ObjectReflector;
+use SebastianBergmann\RecursionContext\Context;
+
+/**
+ * Traverses array structures and object graphs
+ * to enumerate all referenced objects.
+ */
+class Enumerator
+{
+    /**
+     * Returns an array of all objects referenced either
+     * directly or indirectly by a variable.
+     *
+     * @param array|object $variable
+     *
+     * @return object[]
+     */
+    public function enumerate($variable)
+    {
+        if (!is_array($variable) && !is_object($variable)) {
+            throw new InvalidArgumentException;
+        }
+
+        if (isset(func_get_args()[1])) {
+            if (!func_get_args()[1] instanceof Context) {
+                throw new InvalidArgumentException;
+            }
+
+            $processed = func_get_args()[1];
+        } else {
+            $processed = new Context;
+        }
+
+        $objects = [];
+
+        if ($processed->contains($variable)) {
+            return $objects;
+        }
+
+        $array = $variable;
+        $processed->add($variable);
+
+        if (is_array($variable)) {
+            foreach ($array as $element) {
+                if (!is_array($element) && !is_object($element)) {
+                    continue;
+                }
+
+                $objects = array_merge(
+                    $objects,
+                    $this->enumerate($element, $processed)
+                );
+            }
+        } else {
+            $objects[] = $variable;
+
+            $reflector = new ObjectReflector;
+
+            foreach ($reflector->getAttributes($variable) as $value) {
+                if (!is_array($value) && !is_object($value)) {
+                    continue;
+                }
+
+                $objects = array_merge(
+                    $objects,
+                    $this->enumerate($value, $processed)
+                );
+            }
+        }
+
+        return $objects;
+    }
+}