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 
14 struct object {
15     ct_eq<3> member;
16 };
17 
main()18 int main() {
19     auto lvalue = hana::just(object{});
20     ct_eq<3>& ref = lvalue->member;
21     BOOST_HANA_CONSTANT_CHECK(hana::equal(
22         ref,
23         ct_eq<3>{}
24     ));
25 
26     auto const const_lvalue = hana::just(object{});
27     ct_eq<3> const& const_ref = const_lvalue->member;
28     BOOST_HANA_CONSTANT_CHECK(hana::equal(
29         const_ref,
30         ct_eq<3>{}
31     ));
32 
33     BOOST_HANA_CONSTANT_CHECK(hana::equal(
34         hana::just(object{})->member,
35         ct_eq<3>{}
36     ));
37 }
38