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 // <unordered_set>
10
11 // unordered_set& operator=(unordered_set&& 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++03
20
21 #include <unordered_set>
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&);
operator ()some_comp33 bool operator()(const T&, const T&) const { return false; }
34 };
35
36 template <class T>
37 struct some_hash
38 {
39 typedef T value_type;
40 some_hash();
41 some_hash(const some_hash&);
42 some_hash& operator=(const some_hash&);
43 std::size_t operator()(T const&) const;
44 };
45
main(int,char **)46 int main(int, char**)
47 {
48 {
49 typedef std::unordered_set<MoveOnly> C;
50 static_assert(std::is_nothrow_move_assignable<C>::value, "");
51 }
52 {
53 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
54 std::equal_to<MoveOnly>, test_allocator<MoveOnly>> C;
55 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
56 }
57 #if defined(_LIBCPP_VERSION)
58 {
59 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
60 std::equal_to<MoveOnly>, other_allocator<MoveOnly>> C;
61 static_assert(std::is_nothrow_move_assignable<C>::value, "");
62 }
63 #endif // _LIBCPP_VERSION
64 {
65 typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>> C;
66 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
67 }
68 {
69 typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
70 some_comp<MoveOnly>> C;
71 static_assert(!std::is_nothrow_move_assignable<C>::value, "");
72 }
73
74 return 0;
75 }
76