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)
5 #include <boost/hana/at.hpp>
6 #include <boost/hana/back.hpp>
7 #include <boost/hana/front.hpp>
8 #include <boost/hana/tuple.hpp>
11 namespace hana = boost::hana;
14 // This test checks for move-only friendliness and reference semantics.
18 MoveOnly(MoveOnly&&) = default;
19 MoveOnly& operator=(MoveOnly&&) = default;
21 MoveOnly(MoveOnly const&) = delete;
22 MoveOnly& operator=(MoveOnly const&) = delete;
27 auto xs = hana::make_tuple(MoveOnly{});
28 auto by_val = [](auto) { };
30 by_val(std::move(xs));
31 by_val(hana::front(std::move(xs)));
32 by_val(hana::at_c<0>(std::move(xs)));
33 by_val(hana::back(std::move(xs)));
37 auto const& xs = hana::make_tuple(MoveOnly{});
38 auto by_const_ref = [](auto const&) { };
41 by_const_ref(hana::front(xs));
42 by_const_ref(hana::at_c<0>(xs));
43 by_const_ref(hana::back(xs));
47 auto xs = hana::make_tuple(MoveOnly{});
48 auto by_ref = [](auto&) { };
51 by_ref(hana::front(xs));
52 by_ref(hana::at_c<0>(xs));
53 by_ref(hana::back(xs));