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b32b8144 | 1 | // Copyright Louis Dionne 2013-2017 |
7c673cae FG |
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/bool.hpp> | |
7 | #include <boost/hana/equal.hpp> | |
8 | #include <boost/hana/fwd/hash.hpp> | |
9 | #include <boost/hana/map.hpp> | |
10 | #include <boost/hana/pair.hpp> | |
11 | #include <boost/hana/type.hpp> | |
12 | ||
13 | #include <support/constexpr_move_only.hpp> | |
14 | #include <support/tracked_move_only.hpp> | |
15 | ||
16 | #include <string> | |
b32b8144 | 17 | #include <type_traits> |
7c673cae FG |
18 | #include <utility> |
19 | namespace hana = boost::hana; | |
20 | ||
21 | ||
22 | constexpr bool in_constexpr_context() { | |
23 | auto t0 = hana::make_map( | |
24 | hana::make_pair(ConstexprMoveOnly<2>{}, ConstexprMoveOnly<20>{}), | |
25 | hana::make_pair(ConstexprMoveOnly<3>{}, ConstexprMoveOnly<30>{})); | |
26 | auto t_implicit = std::move(t0); | |
27 | auto t_explicit(std::move(t_implicit)); | |
28 | ||
29 | (void)t_implicit; | |
30 | (void)t_explicit; | |
31 | return true; | |
32 | } | |
33 | ||
34 | static_assert(in_constexpr_context(), ""); | |
35 | ||
36 | ||
b32b8144 FG |
37 | struct NoMove { |
38 | NoMove() = default; | |
39 | NoMove(NoMove const&) = delete; | |
40 | NoMove(NoMove&&) = delete; | |
41 | friend auto operator==(NoMove const&, NoMove const&) { return hana::true_c; } | |
42 | friend auto operator!=(NoMove const&, NoMove const&) { return hana::false_c; } | |
43 | }; | |
44 | ||
45 | // Note: It is also useful to check with a non-empty class, because that | |
46 | // triggers different instantiations due to EBO. | |
47 | struct NoMove_nonempty { | |
48 | NoMove_nonempty() = default; | |
49 | NoMove_nonempty(NoMove_nonempty const&) = delete; | |
50 | NoMove_nonempty(NoMove_nonempty&&) = delete; | |
51 | int i; | |
52 | friend auto operator==(NoMove_nonempty const&, NoMove_nonempty const&) { return hana::true_c; } | |
53 | friend auto operator!=(NoMove_nonempty const&, NoMove_nonempty const&) { return hana::false_c; } | |
54 | }; | |
55 | ||
56 | namespace boost { namespace hana { | |
57 | template <> | |
58 | struct hash_impl<NoMove> { | |
59 | static constexpr auto apply(NoMove const&) | |
60 | { return hana::type_c<NoMove>; }; | |
61 | }; | |
62 | ||
63 | template <> | |
64 | struct hash_impl<NoMove_nonempty> { | |
65 | static constexpr auto apply(NoMove_nonempty const&) | |
66 | { return hana::type_c<NoMove_nonempty>; }; | |
67 | }; | |
68 | }} | |
69 | ||
7c673cae FG |
70 | int main() { |
71 | { | |
72 | auto t0 = hana::make_map(); | |
73 | auto t_implicit = std::move(t0); | |
74 | auto t_explicit(std::move(t_implicit)); | |
75 | ||
76 | (void)t_explicit; | |
77 | (void)t_implicit; | |
78 | } | |
79 | { | |
80 | auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{})); | |
81 | auto t_implicit = std::move(t0); | |
82 | auto t_explicit(std::move(t_implicit)); | |
83 | ||
84 | (void)t_implicit; | |
85 | (void)t_explicit; | |
86 | } | |
87 | { | |
88 | auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{}), | |
89 | hana::make_pair(TrackedMoveOnly<2>{}, TrackedMoveOnly<20>{})); | |
90 | auto t_implicit = std::move(t0); | |
91 | auto t_explicit(std::move(t_implicit)); | |
92 | ||
93 | (void)t_implicit; | |
94 | (void)t_explicit; | |
95 | } | |
96 | { | |
97 | auto t0 = hana::make_map(hana::make_pair(TrackedMoveOnly<1>{}, TrackedMoveOnly<10>{}), | |
98 | hana::make_pair(TrackedMoveOnly<2>{}, TrackedMoveOnly<20>{}), | |
99 | hana::make_pair(TrackedMoveOnly<3>{}, TrackedMoveOnly<30>{})); | |
100 | auto t_implicit = std::move(t0); | |
101 | auto t_explicit(std::move(t_implicit)); | |
102 | ||
103 | (void)t_implicit; | |
104 | (void)t_explicit; | |
105 | } | |
106 | { | |
107 | auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"})); | |
108 | auto moved = std::move(t0); | |
109 | BOOST_HANA_RUNTIME_CHECK( | |
110 | moved == hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"})) | |
111 | ); | |
112 | } | |
b32b8144 FG |
113 | |
114 | { | |
115 | using Map1 = hana::map<hana::pair<NoMove, NoMove>>; | |
116 | Map1 map1; | |
117 | static_assert(!std::is_move_constructible<Map1>::value, ""); | |
118 | ||
119 | using Map2 = hana::map<hana::pair<NoMove_nonempty, NoMove_nonempty>>; | |
120 | Map2 map2; | |
121 | static_assert(!std::is_move_constructible<Map2>::value, ""); | |
122 | } | |
7c673cae | 123 | } |