1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <map>
// void swap(multimap& c)
// noexcept(!allocator_type::propagate_on_container_swap::value ||
// __is_nothrow_swappable<allocator_type>::value);
//
// In C++17, the standard says that swap shall have:
// noexcept(allocator_traits<Allocator>::is_always_equal::value &&
// noexcept(swap(declval<Compare&>(), declval<Compare&>())));
// This tests a conforming extension
#include <map>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "MoveOnly.h"
#include "test_allocator.h"
template <class T>
struct some_comp
{
typedef T value_type;
some_comp() {}
some_comp(const some_comp&) {}
bool operator()(const T&, const T&) const { return false; }
};
template <class T>
struct some_comp2
{
typedef T value_type;
some_comp2() {}
some_comp2(const some_comp2&) {}
bool operator()(const T&, const T&) const { return false; }
};
#if TEST_STD_VER >= 14
template <typename T>
void swap(some_comp2<T>&, some_comp2<T>&) noexcept {}
#endif
template <class T>
struct some_alloc
{
typedef T value_type;
some_alloc() {}
some_alloc(const some_alloc&);
void deallocate(void*, unsigned) {}
typedef std::true_type propagate_on_container_swap;
};
template <class T>
struct some_alloc2
{
typedef T value_type;
some_alloc2() {}
some_alloc2(const some_alloc2&);
void deallocate(void*, unsigned) {}
typedef std::false_type propagate_on_container_swap;
typedef std::true_type is_always_equal;
};
template <class T>
struct some_alloc3
{
typedef T value_type;
some_alloc3() {}
some_alloc3(const some_alloc3&);
void deallocate(void*, unsigned) {}
typedef std::false_type propagate_on_container_swap;
typedef std::false_type is_always_equal;
};
int main(int, char**)
{
typedef std::pair<const MoveOnly, MoveOnly> V;
{
typedef std::multimap<MoveOnly, MoveOnly> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if defined(_LIBCPP_VERSION)
{
typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, test_allocator<V>> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{
typedef std::multimap<MoveOnly, MoveOnly, std::less<MoveOnly>, other_allocator<V>> C;
static_assert(noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#endif // _LIBCPP_VERSION
{
typedef std::multimap<MoveOnly, MoveOnly, some_comp<MoveOnly>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if TEST_STD_VER >= 14
{ // POCS allocator, throwable swap for comp
typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc <V>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // always equal allocator, throwable swap for comp
typedef std::multimap<MoveOnly, MoveOnly, some_comp <MoveOnly>, some_alloc2<V>> C;
static_assert(!noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // POCS allocator, nothrow swap for comp
typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc <V>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
{ // always equal allocator, nothrow swap for comp
typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc2<V>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#if defined(_LIBCPP_VERSION)
{ // NOT always equal allocator, nothrow swap for comp
typedef std::multimap<MoveOnly, MoveOnly, some_comp2<MoveOnly>, some_alloc3<V>> C;
static_assert( noexcept(swap(std::declval<C&>(), std::declval<C&>())), "");
}
#endif // _LIBCPP_VERSION
#endif
return 0;
}
|
