1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <tuple>
11
12 // template <class... Types> class tuple;
13
14 // template <class... UTypes> tuple(const tuple<UTypes...>& u);
15
16 // UNSUPPORTED: c++98, c++03
17
18 #include <tuple>
19 #include <utility>
20 #include <string>
21 #include <cassert>
22
23 struct B
24 {
25 int id_;
26
BB27 explicit B(int i) : id_(i) {}
28 };
29
30 struct D
31 : B
32 {
DD33 explicit D(int i) : B(i) {}
34 };
35
36 #if _LIBCPP_STD_VER > 11
37
38 struct A
39 {
40 int id_;
41
AA42 constexpr A(int i) : id_(i) {}
operator ==(const A & x,const A & y)43 friend constexpr bool operator==(const A& x, const A& y) {return x.id_ == y.id_;}
44 };
45
46 struct C
47 {
48 int id_;
49
CC50 constexpr explicit C(int i) : id_(i) {}
operator ==(const C & x,const C & y)51 friend constexpr bool operator==(const C& x, const C& y) {return x.id_ == y.id_;}
52 };
53
54 #endif
55
main()56 int main()
57 {
58 {
59 typedef std::tuple<double> T0;
60 typedef std::tuple<int> T1;
61 T0 t0(2.5);
62 T1 t1 = t0;
63 assert(std::get<0>(t1) == 2);
64 }
65 #if _LIBCPP_STD_VER > 11
66 {
67 typedef std::tuple<double> T0;
68 typedef std::tuple<A> T1;
69 constexpr T0 t0(2.5);
70 constexpr T1 t1 = t0;
71 static_assert(std::get<0>(t1) == 2, "");
72 }
73 {
74 typedef std::tuple<int> T0;
75 typedef std::tuple<C> T1;
76 constexpr T0 t0(2);
77 constexpr T1 t1{t0};
78 static_assert(std::get<0>(t1) == C(2), "");
79 }
80 #endif
81 {
82 typedef std::tuple<double, char> T0;
83 typedef std::tuple<int, int> T1;
84 T0 t0(2.5, 'a');
85 T1 t1 = t0;
86 assert(std::get<0>(t1) == 2);
87 assert(std::get<1>(t1) == int('a'));
88 }
89 {
90 typedef std::tuple<double, char, D> T0;
91 typedef std::tuple<int, int, B> T1;
92 T0 t0(2.5, 'a', D(3));
93 T1 t1 = t0;
94 assert(std::get<0>(t1) == 2);
95 assert(std::get<1>(t1) == int('a'));
96 assert(std::get<2>(t1).id_ == 3);
97 }
98 {
99 D d(3);
100 typedef std::tuple<double, char, D&> T0;
101 typedef std::tuple<int, int, B&> T1;
102 T0 t0(2.5, 'a', d);
103 T1 t1 = t0;
104 d.id_ = 2;
105 assert(std::get<0>(t1) == 2);
106 assert(std::get<1>(t1) == int('a'));
107 assert(std::get<2>(t1).id_ == 2);
108 }
109 {
110 typedef std::tuple<double, char, int> T0;
111 typedef std::tuple<int, int, B> T1;
112 T0 t0(2.5, 'a', 3);
113 T1 t1(t0);
114 assert(std::get<0>(t1) == 2);
115 assert(std::get<1>(t1) == int('a'));
116 assert(std::get<2>(t1).id_ == 3);
117 }
118 }
119