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 // <set>
11 
12 // void swap(multiset& c)
13 //     noexcept(!allocator_type::propagate_on_container_swap::value ||
14 //              __is_nothrow_swappable<allocator_type>::value);
15 
16 // This tests a conforming extension
17 
18 #include <set>
19 #include <cassert>
20 
21 #include "../../../MoveOnly.h"
22 #include "../../../test_allocator.h"
23 
24 template <class T>
25 struct some_comp
26 {
27     typedef T value_type;
28 
29     some_comp() {}
30     some_comp(const some_comp&) {}
31     void deallocate(void*, unsigned) {}
32 
33     typedef std::true_type propagate_on_container_swap;
34 };
35 
36 int main()
37 {
38 #if __has_feature(cxx_noexcept)
39     {
40         typedef std::multiset<MoveOnly> C;
41         C c1, c2;
42         static_assert(noexcept(swap(c1, c2)), "");
43     }
44     {
45         typedef std::multiset<MoveOnly, std::less<MoveOnly>, test_allocator<MoveOnly>> C;
46         C c1, c2;
47         static_assert(noexcept(swap(c1, c2)), "");
48     }
49     {
50         typedef std::multiset<MoveOnly, std::less<MoveOnly>, other_allocator<MoveOnly>> C;
51         C c1, c2;
52         static_assert(noexcept(swap(c1, c2)), "");
53     }
54     {
55         typedef std::multiset<MoveOnly, some_comp<MoveOnly>> C;
56         C c1, c2;
57         static_assert(!noexcept(swap(c1, c2)), "");
58     }
59 #endif
60 }
61