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 // UNSUPPORTED: c++03
10
11 // <unordered_map>
12
13 // void swap(unordered_multimap& c)
14 // noexcept(
15 // (!allocator_type::propagate_on_container_swap::value ||
16 // __is_nothrow_swappable<allocator_type>::value) &&
17 // __is_nothrow_swappable<hasher>::value &&
18 // __is_nothrow_swappable<key_equal>::value);
19 //
20 // In C++17, the standard says that swap shall have:
21 // noexcept(allocator_traits<allocator_type>::is_always_equal::value &&
22 // __is_nothrow_swappable<hasher>::value &&
23 // __is_nothrow_swappable<key_equal>::value);
24
25 // This tests a conforming extension
26
27 #include <unordered_map>
28 #include <utility>
29 #include <cassert>
30
31 #include "test_macros.h"
32 #include "MoveOnly.h"
33 #include "test_allocator.h"
34
35 template <class T>
36 struct some_comp
37 {
38 typedef T value_type;
39
some_compsome_comp40 some_comp() {}
some_compsome_comp41 some_comp(const some_comp&) {}
operator ()some_comp42 bool operator()(const T&, const T&) const { return false; }
43 };
44
45 template <class T>
46 struct some_comp2
47 {
48 typedef T value_type;
49
some_comp2some_comp250 some_comp2() {}
some_comp2some_comp251 some_comp2(const some_comp2&) {}
operator ()some_comp252 bool operator()(const T&, const T&) const { return false; }
53 };
54
55 #if TEST_STD_VER >= 14
56 template <typename T>
swap(some_comp2<T> &,some_comp2<T> &)57 void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
58 #endif
59
60 template <class T>
61 struct some_hash
62 {
63 typedef T value_type;
some_hashsome_hash64 some_hash() {}
65 some_hash(const some_hash&);
66 std::size_t operator()(T const&) const;
67 };
68
69 template <class T>
70 struct some_hash2
71 {
72 typedef T value_type;
some_hash2some_hash273 some_hash2() {}
74 some_hash2(const some_hash2&);
75 std::size_t operator()(T const&) const;
76 };
77
78 #if TEST_STD_VER >= 14
79 template <typename T>
swap(some_hash2<T> &,some_hash2<T> &)80 void swap(some_hash2<T>&, some_hash2<T>&) noexcept {}
81 #endif
82
83 template <class T>
84 struct some_alloc
85 {
86 typedef T value_type;
87
some_allocsome_alloc88 some_alloc() {}
89 some_alloc(const some_alloc&);
deallocatesome_alloc90 void deallocate(void*, unsigned) {}
91
92 typedef std::true_type propagate_on_container_swap;
93 };
94
95 template <class T>
96 struct some_alloc2
97 {
98 typedef T value_type;
99
some_alloc2some_alloc2100 some_alloc2() {}
101 some_alloc2(const some_alloc2&);
deallocatesome_alloc2102 void deallocate(void*, unsigned) {}
103
104 typedef std::false_type propagate_on_container_swap;
105 typedef std::true_type is_always_equal;
106 };
107
108 template <class T>
109 struct some_alloc3
110 {
111 typedef T value_type;
112
some_alloc3some_alloc3113 some_alloc3() {}
114 some_alloc3(const some_alloc3&);
deallocatesome_alloc3115 void deallocate(void*, unsigned) {}
116
117 typedef std::false_type propagate_on_container_swap;
118 typedef std::false_type is_always_equal;
119 };
120
main(int,char **)121 int main(int, char**)
122 {
123 typedef std::pair<const MoveOnly, MoveOnly> V;
124 {
125 typedef std::unordered_multimap<MoveOnly, MoveOnly> C;
126 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
127 }
128 #if defined(_LIBCPP_VERSION)
129 {
130 typedef std::unordered_multimap<MoveOnly, MoveOnly, std::hash<MoveOnly>,
131 std::equal_to<MoveOnly>, test_allocator<V>> C;
132 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
133 }
134 {
135 typedef std::unordered_multimap<MoveOnly, MoveOnly, std::hash<MoveOnly>,
136 std::equal_to<MoveOnly>, other_allocator<V>> C;
137 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
138 }
139 #endif // _LIBCPP_VERSION
140 {
141 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash<MoveOnly>> C;
142 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
143 }
144 {
145 typedef std::unordered_multimap<MoveOnly, MoveOnly, std::hash<MoveOnly>,
146 some_comp<MoveOnly>> C;
147 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
148 }
149
150 #if TEST_STD_VER >= 14
151 { // POCS allocator, throwable swap for hash, throwable swap for comp
152 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash<MoveOnly>, some_comp <MoveOnly>, some_alloc <V>> C;
153 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
154 }
155 { // always equal allocator, throwable swap for hash, throwable swap for comp
156 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash<MoveOnly>, some_comp <MoveOnly>, some_alloc2<V>> C;
157 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
158 }
159 { // POCS allocator, throwable swap for hash, nothrow swap for comp
160 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash<MoveOnly>, some_comp2<MoveOnly>, some_alloc <V>> C;
161 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
162 }
163 { // always equal allocator, throwable swap for hash, nothrow swap for comp
164 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash<MoveOnly>, some_comp2<MoveOnly>, some_alloc2<V>> C;
165 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
166 }
167 { // POCS allocator, nothrow swap for hash, throwable swap for comp
168 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash2<MoveOnly>, some_comp <MoveOnly>, some_alloc <V>> C;
169 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
170 }
171 { // always equal allocator, nothrow swap for hash, throwable swap for comp
172 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash2<MoveOnly>, some_comp <MoveOnly>, some_alloc2<V>> C;
173 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
174 }
175 { // POCS allocator, nothrow swap for hash, nothrow swap for comp
176 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc <V>> C;
177 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
178 }
179 { // always equal allocator, nothrow swap for hash, nothrow swap for comp
180 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc2<V>> C;
181 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
182 }
183 #if defined(_LIBCPP_VERSION)
184 { // NOT always equal allocator, nothrow swap for hash, nothrow swap for comp
185 typedef std::unordered_multimap<MoveOnly, MoveOnly, some_hash2<MoveOnly>, some_comp2<MoveOnly>, some_alloc3<V>> C;
186 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
187 }
188 #endif // _LIBCPP_VERSION
189 #endif
190
191 return 0;
192 }
193