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+#ifndef list_ostream_output_hh
+#define list_ostream_output_hh
+// list_ostream_output.hh
+// robert - programme du robot 2005. {{{
+//
+// Copyright (C) 2005 Nicolas Schodet
+//
+// Robot APB Team/Efrei 2005.
+// Web: http://assos.efrei.fr/robot/
+// Email: robot AT efrei DOT fr
+//
+// This program 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 2 of the License, or
+// (at your option) any later version.
+//
+// This program 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 program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+
+#include <iostream>
+#include <list>
+#include <vector>
+#include <algorithm>
+#include <iterator>
+
+/// Output any list.
+template<typename T>
+std::ostream &
+output_list (std::ostream &os, const T &list)
+{
+ os << '(';
+ std::copy (list.begin (), list.end (),
+ std::ostream_iterator<typename T::value_type> (os, " "));
+ os << ')';
+ return os;
+}
+
+/// Output a list.
+template<typename T>
+std::ostream &
+operator<< (std::ostream &os, const std::list<T> &list)
+{
+ return output_list (os, list);
+}
+
+/// Output a vector.
+template<typename T>
+std::ostream &
+operator<< (std::ostream &os, const std::vector<T> &list)
+{
+ return output_list (os, list);
+}
+
+#endif // list_ostream_output_hh