1 files changed, 16 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/optional/functor.cpp b/src/boost/libs/hana/example/optional/functor.cpp
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+++ b/src/boost/libs/hana/example/optional/functor.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/assert.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/functional/placeholder.hpp>
+#include <boost/hana/optional.hpp>
+#include <boost/hana/transform.hpp>
+namespace hana = boost::hana;
+
+
+BOOST_HANA_CONSTANT_CHECK(hana::transform(hana::nothing, hana::_ + 1) == hana::nothing);
+static_assert(hana::transform(hana::just(1), hana::_ + 1) == hana::just(2), "");
+
+int main() { }