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diff --git a/libstdc++-v3/testsuite/ext/pb_ds/example/hash_load_set_change.cc b/libstdc++-v3/testsuite/ext/pb_ds/example/hash_load_set_change.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 hash_load_set_change_example.cpp
+ * An example of setting and changing the load factor of a hash-based
+ * container object.
+ */
+
+/**
+ * This example shows how to set and change the load-factor of
+ * a hash-based container object through its resize-policy object.
+ */
+
+#include
+#include
+#include
+#include
+
+using namespace std;
+using namespace __gnu_pbds;
+
+// A simple hash functor.
+// hash could serve instead of this functor, but it is not yet
+// standard everywhere.
+struct int_hash : public unary_function
+{
+ inline size_t
+ operator()(int i) const
+ { return i; }
+};
+
+int main()
+{
+ // A trigger policy type.
+ typedef hash_load_check_resize_trigger< true> trigger_t;
+
+ // A resize policy type.
+ typedef
+ hash_standard_resize_policy<
+ hash_exponential_size_policy<>,
+ // Trigger type.
+ trigger_t,
+ /* Allow external access to size.
+ * This is not necessary for setting the load factor,
+ * but it allows to call get_actual_size.
+ */
+ true>
+ resize_t;
+
+ // A collision-chaining hash table mapping ints to chars.
+ typedef
+ cc_hash_table<
+ int,
+ char,
+ int_hash,
+ equal_to,
+ // Combining function.
+ direct_mask_range_hashing<>,
+ // Resize policy.
+ resize_t>
+ map_t;
+
+ // A trigger policy object with load between 0.3 and 0.8.
+ trigger_t trigger(static_cast(0.3), static_cast(0.8));
+
+ // A resize policy object with the above trigger.
+ resize_t resize(hash_exponential_size_policy<>(),
+ trigger);
+
+ map_t r_c(int_hash(),
+ equal_to(),
+ direct_mask_range_hashing<>(),
+ resize);
+
+ r_c[1] = 'a';
+
+ // Check the loads and sizes.
+ assert(r_c.get_loads().first == static_cast(0.3));
+ assert(r_c.get_loads().second == static_cast(0.8));
+ assert(r_c.get_actual_size() == 8);
+ assert(r_c.size() == 1);
+
+ // Note that there is a discrepancy between the loads of the policy
+ // object and the actual size of the container object. This is
+ // because the container's construction performs an implicit
+ // external resize.
+ r_c[2] = 'b';
+ r_c[3] = 'c';
+ r_c[4] = 'd';
+
+ assert(r_c.get_actual_size() == 8);
+
+ // Change the loads. This causes (potentially) a resize.
+ r_c.set_loads(make_pair(static_cast(0.01),
+ static_cast(0.05)));
+
+ // The actual size should really change in this case.
+ assert(r_c.get_actual_size() > 8);
+
+ return 0;
+}
+