]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | // Copyright Louis Dionne 2013-2016 |
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/bool.hpp> | |
6 | #include <boost/hana/detail/wrong.hpp> | |
7 | #include <boost/hana/fwd/hash.hpp> | |
8 | #include <boost/hana/set.hpp> | |
9 | #include <boost/hana/type.hpp> | |
10 | ||
11 | #include <utility> | |
12 | namespace hana = boost::hana; | |
13 | ||
14 | ||
15 | // This test makes sure that we do not instantiate rogue constructors when | |
16 | // doing copies and moves | |
17 | ||
18 | template <int i> | |
19 | struct Trap { | |
20 | Trap() = default; | |
21 | Trap(Trap const&) = default; | |
22 | Trap(Trap&) = default; | |
23 | Trap(Trap&&) = default; | |
24 | ||
25 | template <typename X> | |
26 | Trap(X&&) { | |
27 | static_assert(hana::detail::wrong<X>{}, | |
28 | "this constructor must not be instantiated"); | |
29 | } | |
30 | }; | |
31 | ||
32 | template <int i, int j> | |
33 | constexpr auto operator==(Trap<i> const&, Trap<j> const&) | |
34 | { return hana::bool_c<i == j>; } | |
35 | ||
36 | template <int i, int j> | |
37 | constexpr auto operator!=(Trap<i> const&, Trap<j> const&) | |
38 | { return hana::bool_c<i != j>; } | |
39 | ||
40 | namespace boost { namespace hana { | |
41 | template <int i> | |
42 | struct hash_impl<Trap<i>> { | |
43 | static constexpr auto apply(Trap<i> const&) | |
44 | { return hana::type_c<Trap<i>>; }; | |
45 | }; | |
46 | }} | |
47 | ||
48 | int main() { | |
49 | { | |
50 | auto expr = hana::make_set(Trap<0>{}); | |
51 | auto implicit_copy = expr; | |
52 | decltype(expr) explicit_copy(expr); | |
53 | ||
54 | (void)implicit_copy; | |
55 | (void)explicit_copy; | |
56 | } | |
57 | { | |
58 | auto expr = hana::make_set(Trap<0>{}); | |
59 | auto implicit_move = std::move(expr); | |
60 | decltype(expr) explicit_move(std::move(implicit_move)); | |
61 | ||
62 | (void)implicit_move; | |
63 | (void)explicit_move; | |
64 | } | |
65 | } |