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 // template <class T, size_t N> void swap(array<T,N>& x, array<T,N>& y);
13 
14 #include <array>
15 #include <cassert>
16 
17 // std::array is explicitly allowed to be initialized with A a = { init-list };.
18 // Disable the missing braces warning for this reason.
19 #include "disable_missing_braces_warning.h"
20 
21 int main()
22 {
23     {
24         typedef double T;
25         typedef std::array<T, 3> C;
26         C c1 = {1, 2, 3.5};
27         C c2 = {4, 5, 6.5};
28         swap(c1, c2);
29         assert(c1.size() == 3);
30         assert(c1[0] == 4);
31         assert(c1[1] == 5);
32         assert(c1[2] == 6.5);
33         assert(c2.size() == 3);
34         assert(c2[0] == 1);
35         assert(c2[1] == 2);
36         assert(c2[2] == 3.5);
37     }
38     {
39         typedef double T;
40         typedef std::array<T, 0> C;
41         C c1 = {};
42         C c2 = {};
43         swap(c1, c2);
44         assert(c1.size() == 0);
45         assert(c2.size() == 0);
46     }
47 }
48