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1 // Copyright Louis Dionne 2013-2017
2 // Distributed under the Boost Software License, Version 1.0.
3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/not.hpp>
7 #include <boost/hana/optional.hpp>
8 namespace hana
= boost::hana
;
14 BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(hana::nothing
));
15 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(undefined
{}))));
16 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(hana::nothing
))));