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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/optional.hpp>
- #include <type_traits>
- namespace hana = boost::hana;
- struct Foo { };
- int main() {
- auto just = hana::just(Foo{});
- static_assert(std::is_same<decltype(just), hana::optional<Foo>>{}, "");
- auto nothing = hana::nothing;
- static_assert(std::is_same<decltype(nothing), hana::optional<>>{}, "");
- }
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