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
35template <class T>
36struct some_comp
37{
38 typedef T value_type;
39
40 some_comp() {}
41 some_comp(const some_comp&) {}
42 bool operator()(const T&, const T&) const { return false; }
43};
44
45template <class T>
46struct some_comp2
47{
48 typedef T value_type;
49
50 some_comp2() {}
51 some_comp2(const some_comp2&) {}
52 bool operator()(const T&, const T&) const { return false; }
53};
54
55#if TEST_STD_VER >= 14
56template <typename T>
57void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
58#endif
59
60template <class T>
61struct some_hash
62{
63 typedef T value_type;
64 some_hash() {}
65 some_hash(const some_hash&);
66 std::size_t operator()(T const&) const;
67};
68
69template <class T>
70struct some_hash2
71{
72 typedef T value_type;
73 some_hash2() {}
74 some_hash2(const some_hash2&);
75 std::size_t operator()(T const&) const;
76};
77
78#if TEST_STD_VER >= 14
79template <typename T>
80void swap(some_hash2<T>&, some_hash2<T>&) noexcept {}
81#endif
82
83template <class T>
84struct some_alloc
85{
86 typedef T value_type;
87
88 some_alloc() {}
89 some_alloc(const some_alloc&);
90 void deallocate(void*, unsigned) {}
91
92 typedef std::true_type propagate_on_container_swap;
93};
94
95template <class T>
96struct some_alloc2
97{
98 typedef T value_type;
99
100 some_alloc2() {}
101 some_alloc2(const some_alloc2&);
102 void deallocate(void*, unsigned) {}
103
104 typedef std::false_type propagate_on_container_swap;
105 typedef std::true_type is_always_equal;
106};
107
108template <class T>
109struct some_alloc3
110{
111 typedef T value_type;
112
113 some_alloc3() {}
114 some_alloc3(const some_alloc3&);
115 void deallocate(void*, unsigned) {}
116
117 typedef std::false_type propagate_on_container_swap;
118 typedef std::false_type is_always_equal;
119};
120
121int 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(a&: std::declval<C&>(), b&: 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

source code of libcxx/test/std/containers/unord/unord.multimap/unord.multimap.swap/swap_noexcept.pass.cpp