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()14int 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