[ceph.git] / ceph / src / boost / libs / hana / test / optional / representation.cpp

// 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<>>{}, "");
}
Commit	Line	Data
b32b8144	1	// Copyright Louis Dionne 2013-2017
7c673cae FG	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)
	4
	5	#include <boost/hana/optional.hpp>
	6
	7	#include <type_traits>
	8	namespace hana = boost::hana;
	9
	10
	11	struct Foo { };
	12
	13	int main() {
	14	auto just = hana::just(Foo{});
	15	static_assert(std::is_same<decltype(just), hana::optional<Foo>>{}, "");
	16
	17	auto nothing = hana::nothing;
	18	static_assert(std::is_same<decltype(nothing), hana::optional<>>{}, "");
	19	}