xref: /llvm-project/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.assign/move.pass.cpp (revision 949389c395edffc54f3551cbb595065a6f4e6a78)
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 // tuple& operator=(tuple&& u);
15 
16 #include <tuple>
17 #include <utility>
18 #include <cassert>
19 
20 #include "MoveOnly.h"
21 
22 int main()
23 {
24     {
25         typedef std::tuple<> T;
26         T t0;
27         T t;
28         t = std::move(t0);
29     }
30     {
31         typedef std::tuple<MoveOnly> T;
32         T t0(MoveOnly(0));
33         T t;
34         t = std::move(t0);
35         assert(std::get<0>(t) == 0);
36     }
37     {
38         typedef std::tuple<MoveOnly, MoveOnly> T;
39         T t0(MoveOnly(0), MoveOnly(1));
40         T t;
41         t = std::move(t0);
42         assert(std::get<0>(t) == 0);
43         assert(std::get<1>(t) == 1);
44     }
45     {
46         typedef std::tuple<MoveOnly, MoveOnly, MoveOnly> T;
47         T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2));
48         T t;
49         t = std::move(t0);
50         assert(std::get<0>(t) == 0);
51         assert(std::get<1>(t) == 1);
52         assert(std::get<2>(t) == 2);
53     }
54 }
55