1234567891011121314151617 |
- // 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/not.hpp>
- #include <boost/hana/optional.hpp>
- namespace hana = boost::hana;
- struct undefined { };
- int main() {
- BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(hana::nothing));
- BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(undefined{}))));
- BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_nothing(hana::just(hana::nothing))));
- }
|