--- /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 <set>
+
+namespace std {
+ template <class Key, class Compare, class Allocator>
+ class set;
+
+ template <class Key, class Compare, class Allocator>
+ bool operator==(const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator< (const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator!=(const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator> (const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator>=(const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator<=(const set<Key,Compare,Allocator>& x,
+ const set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ void swap(set<Key,Compare,Allocator>& x,
+ set<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ class multiset;
+
+ template <class Key, class Compare, class Allocator>
+ bool operator==(const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator< (const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator!=(const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator> (const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator>=(const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ bool operator<=(const multiset<Key,Compare,Allocator>& x,
+ const multiset<Key,Compare,Allocator>& y);
+
+ template <class Key, class Compare, class Allocator>
+ void swap(multiset<Key,Compare,Allocator>& x,
+ multiset<Key,Compare,Allocator>& y);
+}