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 // <map>
10 
11 // map& operator=(map&& c)
12 //     noexcept(
13 //          allocator_type::propagate_on_container_move_assignment::value &&
14 //          is_nothrow_move_assignable<allocator_type>::value &&
15 //          is_nothrow_move_assignable<key_compare>::value);
16 
17 // This tests a conforming extension
18 
19 // UNSUPPORTED: c++98, c++03
20 
21 #include <map>
22 #include <cassert>
23 
24 #include "test_macros.h"
25 #include "MoveOnly.h"
26 #include "test_allocator.h"
27 
28 template <class T>
29 struct some_comp
30 {
31     typedef T value_type;
32     some_comp& operator=(const some_comp&);
33     bool operator()(const T&, const T&) const { return false; }
34 };
35 
36 int main(int, char**)
37 {
38     typedef std::pair<const MoveOnly, MoveOnly> V;
39     {
40         typedef std::map<MoveOnly, MoveOnly> C;
41         static_assert(std::is_nothrow_move_assignable<C>::value, "");
42     }
43     {
44         typedef std::map<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<V>> C;
45         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
46     }
47 #if defined(_LIBCPP_VERSION)
48     {
49         typedef std::map<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<V>> C;
50         static_assert(std::is_nothrow_move_assignable<C>::value, "");
51     }
52 #endif // _LIBCPP_VERSION
53     {
54         typedef std::map<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
55         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
56     }
57 
58   return 0;
59 }
60