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 // <array>
11 
12 // void swap(array& a);
13 // namespace std { void swap(array<T, N> &x, array<T, N> &y);
14 
15 #include <cassert>
16 #include <array>
17 
18 // std::array is explicitly allowed to be initialized with A a = { init-list };.
19 // Disable the missing braces warning for this reason.
20 #include "disable_missing_braces_warning.h"
21 
22 int main()
23 {
24     {
25         typedef double T;
26         typedef std::array<T, 3> C;
27         C c1 = {1, 2, 3.5};
28         C c2 = {4, 5, 6.5};
29         c1.swap(c2);
30         assert(c1.size() == 3);
31         assert(c1[0] == 4);
32         assert(c1[1] == 5);
33         assert(c1[2] == 6.5);
34         assert(c2.size() == 3);
35         assert(c2[0] == 1);
36         assert(c2[1] == 2);
37         assert(c2[2] == 3.5);
38     }
39     {
40         typedef double T;
41         typedef std::array<T, 3> C;
42         C c1 = {1, 2, 3.5};
43         C c2 = {4, 5, 6.5};
44         std::swap(c1, c2);
45         assert(c1.size() == 3);
46         assert(c1[0] == 4);
47         assert(c1[1] == 5);
48         assert(c1[2] == 6.5);
49         assert(c2.size() == 3);
50         assert(c2[0] == 1);
51         assert(c2[1] == 2);
52         assert(c2[2] == 3.5);
53     }
54 
55     {
56         typedef double T;
57         typedef std::array<T, 0> C;
58         C c1 = {};
59         C c2 = {};
60         c1.swap(c2);
61         assert(c1.size() == 0);
62         assert(c2.size() == 0);
63     }
64     {
65         typedef double T;
66         typedef std::array<T, 0> C;
67         C c1 = {};
68         C c2 = {};
69         std::swap(c1, c2);
70         assert(c1.size() == 0);
71         assert(c2.size() == 0);
72     }
73 
74 }
75