1 files changed, 29 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/27_io/types/4.cc b/libstdc++-v3/testsuite/27_io/types/4.cc
new file mode 100644
index 00000000000..ee1a77736ce
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/types/4.cc
@@ -0,0 +1,29 @@
+// Copyright (C) 2017 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  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/>.
+
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++1z } }
+
+// In C++17 these names are not reserved by the library.
+#define io_state 1
+#define open_mode 2
+#define seek_dir 3
+#define stossc 4
+#include <streambuf>
+
+template class std::basic_streambuf<char>;
+template class std::basic_streambuf<wchar_t>;