1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <map>
11
12 // void swap(multimap& c)
13 // noexcept(!allocator_type::propagate_on_container_swap::value ||
14 // __is_nothrow_swappable<allocator_type>::value);
15 //
16 // In C++17, the standard says that swap shall have:
17 // noexcept(allocator_traits<Allocator>::is_always_equal::value &&
18 // noexcept(swap(declval<Compare&>(), declval<Compare&>())));
19
20 // This tests a conforming extension
21
22 #include <map>
23 #include <cassert>
24
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_compsome_comp33 some_comp() {}
some_compsome_comp34 some_comp(const some_comp&) {}
deallocatesome_comp35 void deallocate(void*, unsigned) {}
36
37 typedef std::true_type propagate_on_container_swap;
38 };
39
40 template <class T>
41 struct some_comp2
42 {
43 typedef T value_type;
44
some_comp2some_comp245 some_comp2() {}
some_comp2some_comp246 some_comp2(const some_comp2&) {}
deallocatesome_comp247 void deallocate(void*, unsigned) {}
48 typedef std::true_type propagate_on_container_swap;
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()94 int main()
95 {
96 #if __has_feature(cxx_noexcept)
97 {
98 typedef std::multimap<MoveOnly, MoveOnly> C;
99 C c1, c2;
100 static_assert(noexcept(swap(c1, c2)), "");
101 }
102 {
103 typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<MoveOnly>> C;
104 C c1, c2;
105 static_assert(noexcept(swap(c1, c2)), "");
106 }
107 {
108 typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<MoveOnly>> C;
109 C c1, c2;
110 static_assert(noexcept(swap(c1, c2)), "");
111 }
112 {
113 typedef std::multimap<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
114 C c1, c2;
115 static_assert(!noexcept(swap(c1, c2)), "");
116 }
117
118 #if TEST_STD_VER >= 14
119 { // POCS allocator, throwable swap for comp
120 typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc <MoveOnly>> C;
121 C c1, c2;
122 static_assert(!noexcept(swap(c1, c2)), "");
123 }
124 { // always equal allocator, throwable swap for comp
125 typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc2<MoveOnly>> C;
126 C c1, c2;
127 static_assert(!noexcept(swap(c1, c2)), "");
128 }
129 { // POCS allocator, nothrow swap for comp
130 typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc <MoveOnly>> C;
131 C c1, c2;
132 static_assert( noexcept(swap(c1, c2)), "");
133 }
134 { // always equal allocator, nothrow swap for comp
135 typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc2<MoveOnly>> C;
136 C c1, c2;
137 static_assert( noexcept(swap(c1, c2)), "");
138 }
139
140 { // NOT always equal allocator, nothrow swap for comp
141 typedef std::map<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc3<MoveOnly>> C;
142 C c1, c2;
143 static_assert( noexcept(swap(c1, c2)), "");
144 }
145 #endif
146
147 #endif
148 }
149