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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/tuple.hpp> | |
7 | ||
8 | #include <type_traits> | |
9 | #include <utility> | |
10 | namespace hana = boost::hana; | |
11 | ||
12 | ||
13 | struct MoveOnly { | |
14 | int data_; | |
15 | MoveOnly(MoveOnly const&) = delete; | |
16 | MoveOnly& operator=(MoveOnly const&) = delete; | |
17 | MoveOnly(int data = 1) : data_(data) { } | |
18 | MoveOnly(MoveOnly&& x) : data_(x.data_) { x.data_ = 0; } | |
19 | ||
20 | MoveOnly& operator=(MoveOnly&& x) | |
21 | { data_ = x.data_; x.data_ = 0; return *this; } | |
22 | ||
23 | int get() const {return data_;} | |
24 | bool operator==(const MoveOnly& x) const { return data_ == x.data_; } | |
25 | bool operator< (const MoveOnly& x) const { return data_ < x.data_; } | |
26 | }; | |
27 | ||
28 | int main() { | |
29 | { | |
30 | using T = hana::tuple<>; | |
31 | T t0; | |
32 | T t = std::move(t0); (void)t; | |
33 | } | |
34 | { | |
35 | using T = hana::tuple<MoveOnly>; | |
36 | T t0(MoveOnly(0)); | |
37 | T t = std::move(t0); (void)t; | |
38 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0); | |
39 | } | |
40 | { | |
41 | using T = hana::tuple<MoveOnly, MoveOnly>; | |
42 | T t0(MoveOnly(0), MoveOnly(1)); | |
43 | T t = std::move(t0); (void)t; | |
44 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0); | |
45 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 1); | |
46 | } | |
47 | { | |
48 | using T = hana::tuple<MoveOnly, MoveOnly, MoveOnly>; | |
49 | T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2)); | |
50 | T t = std::move(t0); (void)t; | |
51 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0); | |
52 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 1); | |
53 | BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 2); | |
54 | } | |
55 | { | |
56 | // Check for SFINAE-friendliness | |
57 | static_assert(!std::is_constructible< | |
58 | hana::tuple<MoveOnly>, MoveOnly const& | |
59 | >{}, ""); | |
60 | ||
61 | static_assert(!std::is_constructible< | |
62 | hana::tuple<MoveOnly>, MoveOnly& | |
63 | >{}, ""); | |
64 | ||
65 | static_assert(std::is_constructible< | |
66 | hana::tuple<MoveOnly>, MoveOnly | |
67 | >{}, ""); | |
68 | ||
69 | static_assert(std::is_constructible< | |
70 | hana::tuple<MoveOnly>, MoveOnly&& | |
71 | >{}, ""); | |
72 | } | |
73 | } |