// 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 #include #include #include namespace hana = boost::hana; using hana::test::ct_eq; struct undefined { }; int main() { BOOST_HANA_CONSTANT_CHECK(hana::equal( hana::nothing.value_or(ct_eq<3>{}), ct_eq<3>{} )); BOOST_HANA_CONSTANT_CHECK(hana::equal( hana::just(ct_eq<4>{}).value_or(undefined{}), ct_eq<4>{} )); }