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 // <utility>
11 
12 // template<class T>
13 //   requires MoveAssignable<T> && MoveConstructible<T>
14 //   void
15 //   swap(T& a, T& b);
16 
17 #include <utility>
18 #include <cassert>
19 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
20 #include <memory>
21 #endif
22 
23 void
24 test()
25 {
26     int i = 1;
27     int j = 2;
28     std::swap(i, j);
29     assert(i == 2);
30     assert(j == 1);
31 }
32 
33 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
34 
35 void
36 test1()
37 {
38     std::unique_ptr<int> i(new int(1));
39     std::unique_ptr<int> j(new int(2));
40     std::swap(i, j);
41     assert(*i == 2);
42     assert(*j == 1);
43 }
44 
45 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
46 
47 int main()
48 {
49     test();
50 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
51     test1();
52 #endif
53 }
54