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diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/basic_map.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/basic_map.cc
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+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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
+// .
+
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file basic_map_example.cpp
+ * A basic example showing how to use maps.
+ */
+
+/**
+ * This example shows how to use "maps". It defines a
+ * function performing a sequence of operations on
+ * a generic container. It then calls this function with some containers.
+ */
+
+#include
+#include
+#include
+
+using namespace std;
+using namespace __gnu_pbds;
+
+// The following function performs a sequence of operations on an
+// associative container object mapping integers to characters.
+template
+void
+some_op_sequence(Cntnr& r_c)
+{
+ assert(r_c.empty());
+ assert(r_c.size() == 0);
+
+ r_c.insert(make_pair(1, 'a'));
+
+ r_c[2] = 'b';
+
+ assert(!r_c.empty());
+ assert(r_c.size() == 2);
+
+ cout << "Key 1 is mapped to " << r_c[1] << endl;
+ cout << "Key 2 is mapped to " << r_c[2] << endl;
+
+ cout << endl << "All value types in the container:" << endl;
+
+ typedef typename Cntnr::const_iterator const_iterator;
+ for (const_iterator it = r_c.begin(); it != r_c.end(); ++it)
+ cout << it->first << " -> " << it->second << endl;
+ cout << endl;
+
+ r_c.clear();
+
+ assert(r_c.empty());
+ assert(r_c.size() == 0);
+}
+
+int main()
+{
+ {
+ // Perform operations on a collision-chaining hash map.
+ cc_hash_table c;
+ some_op_sequence(c);
+ }
+
+ {
+ // Perform operations on a general-probing hash map.
+ gp_hash_table c;
+ some_op_sequence(c);
+ }
+
+ {
+ // Perform operations on a red-black tree map.
+ tree c;
+ some_op_sequence(c);
+ }
+
+ {
+ // Perform operations on a splay tree map.
+ tree, splay_tree_tag> c;
+ some_op_sequence(c);
+ }
+
+ {
+ // Perform operations on an ov tree map.
+ tree, ov_tree_tag> c;
+ some_op_sequence(c);
+ }
+
+ {
+ // Perform operations on a list-update map.
+ list_update c;
+ some_op_sequence(c);
+ }
+}