--- /dev/null
+// { dg-do compile }
+// 2001-02-11 gdr
+// Origin: Craig Rodrigues <rodrigc@mediaone.net>
+
+// Copyright (C) 2001, 2003, 2007, 2009 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/>.
+
+// 21.1.2: char_traits typedefs
+
+#include <string>
+
+int main()
+{
+ // Check for required typedefs.
+ typedef std::char_traits<wchar_t> test_type;
+ typedef test_type::char_type char_type;
+ typedef test_type::int_type int_type;
+ typedef test_type::off_type off_type;
+ typedef test_type::pos_type pos_type;
+ typedef test_type::state_type state_type;
+
+ // 21.1.3: char_traits<wchar_t>::int_type == wint_t
+ test_type::int_type* p = 0;
+ wint_t* q __attribute__((unused)) = p;
+
+ return 0;
+}