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 using hana::test::ct_eq;
12 
13 
main()14 int main() {
15     auto lvalue = hana::just(ct_eq<3>{});
16     ct_eq<3>& ref = lvalue.value();
17     BOOST_HANA_CONSTANT_CHECK(hana::equal(
18         ref,
19         ct_eq<3>{}
20     ));
21 
22     auto const const_lvalue = hana::just(ct_eq<3>{});
23     ct_eq<3> const& const_ref = const_lvalue.value();
24     BOOST_HANA_CONSTANT_CHECK(hana::equal(
25         const_ref,
26         ct_eq<3>{}
27     ));
28 
29     BOOST_HANA_CONSTANT_CHECK(hana::equal(
30         hana::just(ct_eq<3>{}).value(),
31         ct_eq<3>{}
32     ));
33 }
34