Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/boost/libs/hana/example/back.cpp b/src/boost/libs/hana/example/back.cpp
new file mode 100644
index 00000000..4ca689c1
--- /dev/null
+++ b/src/boost/libs/hana/example/back.cpp
@@ -0,0 +1,13 @@
+// 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() { }