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diff --git a/src/boost/libs/container_hash/examples/template.cpp b/src/boost/libs/container_hash/examples/template.cpp
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+
+// Copyright 2012 Daniel James.
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include "template.hpp"
+#include <cassert>
+#include <boost/unordered_set.hpp>
+
+int main()
+{
+ typedef my_pair<int, float> pair;
+ boost::unordered_set<pair> pair_set;
+ pair_set.emplace(10, 0.5f);
+
+ assert(pair_set.find(pair(10, 0.5f)) != pair_set.end());
+ assert(pair_set.find(pair(10, 0.6f)) == pair_set.end());
+}