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 // <algorithm>
10 
11 // template<Iterator Iter1, Iterator Iter2>
12 //   requires HasSwap<Iter1::reference, Iter2::reference>
13 //   void
14 //   iter_swap(Iter1 a, Iter2 b);
15 
16 #include <algorithm>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 #if TEST_STD_VER > 17
test_swap_constexpr()22 constexpr bool test_swap_constexpr()
23 {
24     int i = 1;
25     int j = 2;
26     std::iter_swap(&i, &j);
27     return i == 2 && j == 1;
28 }
29 #endif // TEST_STD_VER > 17
30 
main(int,char **)31 int main(int, char**)
32 {
33     int i = 1;
34     int j = 2;
35     std::iter_swap(&i, &j);
36     assert(i == 2);
37     assert(j == 1);
38 
39 #if TEST_STD_VER > 17
40     static_assert(test_swap_constexpr());
41 #endif // TEST_STD_VER > 17
42 
43   return 0;
44 }
45