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diff --git a/src/boost/libs/hana/example/back.cpp b/src/boost/libs/hana/example/back.cpp
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+++ b/src/boost/libs/hana/example/back.cpp
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+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/back.hpp>
+#include <boost/hana/tuple.hpp>
+namespace hana = boost::hana;
+
+
+static_assert(hana::back(hana::make_tuple(1, '2', 3.3)) == 3.3, "");
+static_assert(hana::back(hana::make_tuple(1, '2', 3.3, nullptr)) == nullptr, "");
+
+int main() { }