--- /dev/null
+// { dg-do compile }
+
+// Copyright (C) 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/>.
+
+#include <bitset>
+
+namespace std {
+ template <size_t N> class bitset;
+
+ // 23.3.5.3 bitset operations:
+ template <size_t N>
+ bitset<N> operator&(const bitset<N>&, const bitset<N>&);
+
+ template <size_t N>
+ bitset<N> operator|(const bitset<N>&, const bitset<N>&);
+
+ template <size_t N>
+ bitset<N> operator^(const bitset<N>&, const bitset<N>&);
+
+ template <class charT, class traits, size_t N>
+ basic_istream<charT, traits>&
+ operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
+
+ template <class charT, class traits, size_t N>
+ basic_ostream<charT, traits>&
+ operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);
+}