// 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/optional.hpp>
namespace hana = boost::hana;


constexpr auto x = hana::nothing;
BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(x));

int main() { }