--- /dev/null
+// { dg-do compile }
+// { dg-options "-Wall" { target *-*-* } }
+// -*- C++ -*-
+
+// Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 3, or (at
+// your option) any later version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+
+// Benjamin Kosnik <bkoz@redhat.com>
+
+#include <ios>
+
+// PR libstdc++/17922
+// -Wall
+typedef std::ios_base::openmode bitmask_type;
+
+void
+case_labels(bitmask_type b)
+{
+ switch (b)
+ {
+ case std::ios_base::app:
+ break;
+ case std::ios_base::ate:
+ break;
+ case std::ios_base::binary:
+ break;
+ case std::ios_base::in:
+ break;
+ case std::ios_base::out:
+ break;
+ case std::ios_base::trunc:
+ break;
+ case std::_S_ios_openmode_end:
+ break;
+ }
+}