1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <tuple>
10
11 // template <class... Types> class tuple;
12
13 // template <class... UTypes> tuple(tuple<UTypes...>&& u);
14
15 // UNSUPPORTED: c++03
16
17 #include <tuple>
18 #include <string>
19 #include <memory>
20 #include <cassert>
21
22 #include "test_macros.h"
23
24 struct Explicit {
25 int value;
ExplicitExplicit26 explicit Explicit(int x) : value(x) {}
27 };
28
29 struct Implicit {
30 int value;
ImplicitImplicit31 Implicit(int x) : value(x) {}
32 };
33
34 struct B
35 {
36 int id_;
37
BB38 explicit B(int i) : id_(i) {}
39
~BB40 virtual ~B() {}
41 };
42
43 struct D
44 : B
45 {
DD46 explicit D(int i) : B(i) {}
47 };
48
49 struct BonkersBananas {
50 template <class T>
51 operator T() &&;
52 template <class T, class = void>
53 explicit operator T() && = delete;
54 };
55
test_bonkers_bananas_conversion()56 void test_bonkers_bananas_conversion() {
57 using ReturnType = std::tuple<int, int>;
58 static_assert(std::is_convertible<BonkersBananas, ReturnType>(), "");
59 static_assert(!std::is_constructible<ReturnType, BonkersBananas>(), "");
60
61 }
62
main(int,char **)63 int main(int, char**)
64 {
65 {
66 typedef std::tuple<long> T0;
67 typedef std::tuple<long long> T1;
68 T0 t0(2);
69 T1 t1 = std::move(t0);
70 assert(std::get<0>(t1) == 2);
71 }
72 {
73 typedef std::tuple<long, char> T0;
74 typedef std::tuple<long long, int> T1;
75 T0 t0(2, 'a');
76 T1 t1 = std::move(t0);
77 assert(std::get<0>(t1) == 2);
78 assert(std::get<1>(t1) == int('a'));
79 }
80 {
81 typedef std::tuple<long, char, D> T0;
82 typedef std::tuple<long long, int, B> T1;
83 T0 t0(2, 'a', D(3));
84 T1 t1 = std::move(t0);
85 assert(std::get<0>(t1) == 2);
86 assert(std::get<1>(t1) == int('a'));
87 assert(std::get<2>(t1).id_ == 3);
88 }
89 {
90 D d(3);
91 typedef std::tuple<long, char, D&> T0;
92 typedef std::tuple<long long, int, B&> T1;
93 T0 t0(2, 'a', d);
94 T1 t1 = std::move(t0);
95 d.id_ = 2;
96 assert(std::get<0>(t1) == 2);
97 assert(std::get<1>(t1) == int('a'));
98 assert(std::get<2>(t1).id_ == 2);
99 }
100 {
101 typedef std::tuple<long, char, std::unique_ptr<D>> T0;
102 typedef std::tuple<long long, int, std::unique_ptr<B>> T1;
103 T0 t0(2, 'a', std::unique_ptr<D>(new D(3)));
104 T1 t1 = std::move(t0);
105 assert(std::get<0>(t1) == 2);
106 assert(std::get<1>(t1) == int('a'));
107 assert(std::get<2>(t1)->id_ == 3);
108 }
109 {
110 std::tuple<int> t1(42);
111 std::tuple<Explicit> t2(std::move(t1));
112 assert(std::get<0>(t2).value == 42);
113 }
114 {
115 std::tuple<int> t1(42);
116 std::tuple<Implicit> t2 = std::move(t1);
117 assert(std::get<0>(t2).value == 42);
118 }
119
120 return 0;
121 }
122