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)
4 
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/equal.hpp>
7 #include <boost/hana/not.hpp>
8 #include <boost/hana/not_equal.hpp> // for operator !=
9 #include <boost/hana/optional.hpp>
10 
11 #include <laws/base.hpp>
12 namespace hana = boost::hana;
13 
14 
main()15 int main() {
16     hana::test::ct_eq<3> x{};
17     hana::test::ct_eq<4> y{};
18 
19     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::nothing, hana::nothing));
20     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::nothing, hana::just(x))));
21     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::just(x), hana::nothing)));
22     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::just(x), hana::just(x)));
23     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::just(x), hana::just(y))));
24 
25     BOOST_HANA_CONSTANT_CHECK(hana::nothing == hana::nothing);
26     BOOST_HANA_CONSTANT_CHECK(hana::just(x) == hana::just(x));
27     BOOST_HANA_CONSTANT_CHECK(hana::just(x) != hana::just(y));
28     BOOST_HANA_CONSTANT_CHECK(hana::just(x) != hana::nothing);
29     BOOST_HANA_CONSTANT_CHECK(hana::nothing != hana::just(x));
30 }
31