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/optional.hpp>
8 
9 #include <laws/base.hpp>
10 namespace hana = boost::hana;
11 
12 
13 struct undefined { };
14 
main()15 int main() {
16     hana::test::_injection<0> f{};
17     hana::test::ct_eq<2> x{};
18 
19     BOOST_HANA_CONSTANT_CHECK(hana::equal(
20         hana::maybe(x, undefined{}, hana::nothing),
21         x
22     ));
23 
24     BOOST_HANA_CONSTANT_CHECK(hana::equal(
25         hana::maybe(undefined{}, f, hana::just(x)),
26         f(x)
27     ));
28 }
29