1 files changed, 31 insertions, 0 deletions
diff --git a/xpcom/ds/nsArrayEnumerator.h b/xpcom/ds/nsArrayEnumerator.h
new file mode 100644
index 0000000000..a406a9ea66
--- /dev/null
+++ b/xpcom/ds/nsArrayEnumerator.h
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsArrayEnumerator_h__
+#define nsArrayEnumerator_h__
+
+// enumerator implementation for nsIArray
+
+#include "nsISupports.h"
+
+class nsISimpleEnumerator;
+class nsIArray;
+class nsCOMArray_base;
+
+// Create an enumerator for an existing nsIArray implementation
+// The enumerator holds an owning reference to the array.
+nsresult NS_NewArrayEnumerator(nsISimpleEnumerator** aResult, nsIArray* aArray,
+                               const nsID& aEntryIID = NS_GET_IID(nsISupports));
+
+// create an enumerator for an existing nsCOMArray<T> implementation
+// The enumerator will hold an owning reference to each ELEMENT in
+// the array. This means that the nsCOMArray<T> can safely go away
+// without its objects going away.
+nsresult NS_NewArrayEnumerator(nsISimpleEnumerator** aResult,
+                               const nsCOMArray_base& aArray,
+                               const nsID& aEntryIID = NS_GET_IID(nsISupports));
+
+#endif