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 // <map>
12
13 // void swap(multimap& c)
14 // noexcept(!allocator_type::propagate_on_container_swap::value ||
15 // __is_nothrow_swappable<allocator_type>::value);
16 //
17 // In C++17, the standard says that swap shall have:
18 // noexcept(allocator_traits<Allocator>::is_always_equal::value &&
19 // noexcept(swap(declval<Compare&>(), declval<Compare&>())));
20
21 // This tests a conforming extension
22
23 #include <map>
24 #include <utility>
25 #include <cassert>
26
27 #include "test_macros.h"
28 #include "MoveOnly.h"
29 #include "test_allocator.h"
30
31 template <class T>
32 struct some_comp
33 {
34 typedef T value_type;
35
some_compsome_comp36 some_comp() {}
some_compsome_comp37 some_comp(const some_comp&) {}
operator ()some_comp38 bool operator()(const T&, const T&) const { return false; }
39 };
40
41 template <class T>
42 struct some_comp2
43 {
44 typedef T value_type;
45
some_comp2some_comp246 some_comp2() {}
some_comp2some_comp247 some_comp2(const some_comp2&) {}
operator ()some_comp248 bool operator()(const T&, const T&) const { return false; }
49 };
50
51 #if TEST_STD_VER >= 14
52 template <typename T>
swap(some_comp2<T> &,some_comp2<T> &)53 void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
54 #endif
55
56 template <class T>
57 struct some_alloc
58 {
59 typedef T value_type;
60
some_allocsome_alloc61 some_alloc() {}
62 some_alloc(const some_alloc&);
deallocatesome_alloc63 void deallocate(void*, unsigned) {}
64
65 typedef std::true_type propagate_on_container_swap;
66 };
67
68 template <class T>
69 struct some_alloc2
70 {
71 typedef T value_type;
72
some_alloc2some_alloc273 some_alloc2() {}
74 some_alloc2(const some_alloc2&);
deallocatesome_alloc275 void deallocate(void*, unsigned) {}
76
77 typedef std::false_type propagate_on_container_swap;
78 typedef std::true_type is_always_equal;
79 };
80
81 template <class T>
82 struct some_alloc3
83 {
84 typedef T value_type;
85
some_alloc3some_alloc386 some_alloc3() {}
87 some_alloc3(const some_alloc3&);
deallocatesome_alloc388 void deallocate(void*, unsigned) {}
89
90 typedef std::false_type propagate_on_container_swap;
91 typedef std::false_type is_always_equal;
92 };
93
main(int,char **)94 int main(int, char**)
95 {
96 typedef std::pair<const MoveOnly, MoveOnly> V;
97 {
98 typedef std::multimap<MoveOnly, MoveOnly> C;
99 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
100 }
101 #if defined(_LIBCPP_VERSION)
102 {
103 typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<V>> C;
104 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
105 }
106 {
107 typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<V>> C;
108 static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
109 }
110 #endif // _LIBCPP_VERSION
111 {
112 typedef std::multimap<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
113 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
114 }
115
116 #if TEST_STD_VER >= 14
117 { // POCS allocator, throwable swap for comp
118 typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc <V>> C;
119 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
120 }
121 { // always equal allocator, throwable swap for comp
122 typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc2<V>> C;
123 static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
124 }
125 { // POCS allocator, nothrow swap for comp
126 typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc <V>> C;
127 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
128 }
129 { // always equal allocator, nothrow swap for comp
130 typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc2<V>> C;
131 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
132 }
133 #if defined(_LIBCPP_VERSION)
134 { // NOT always equal allocator, nothrow swap for comp
135 typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc3<V>> C;
136 static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
137 }
138 #endif // _LIBCPP_VERSION
139 #endif
140
141 return 0;
142 }
143