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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <unordered_map>
// class unordered_multimap
// template <class H2, class P2>
// void merge(unordered_map<key_type, value_type, H2, P2, allocator_type>& source);
// template <class H2, class P2>
// void merge(unordered_map<key_type, value_type, H2, P2, allocator_type>&& source);
// template <class H2, class P2>
// void merge(unordered_multimap<key_type, value_type, H2, P2, allocator_type>& source);
// template <class H2, class P2>
// void merge(unordered_multimap<key_type, value_type, H2, P2, allocator_type>&& source);
#include <unordered_map>
#include <cassert>
#include "test_macros.h"
#include "Counter.h"
template <class Map>
bool map_equal(const Map& map, Map other)
{
return map == other;
}
#ifndef TEST_HAS_NO_EXCEPTIONS
template <class T>
struct throw_hasher
{
bool& should_throw_;
throw_hasher(bool& should_throw) : should_throw_(should_throw) {}
size_t operator()(const T& p) const
{
if (should_throw_)
throw 0;
return std::hash<T>()(p);
}
};
#endif
int main()
{
{
std::unordered_multimap<int, int> src{{1, 0}, {3, 0}, {5, 0}};
std::unordered_multimap<int, int> dst{{2, 0}, {4, 0}, {5, 0}};
dst.merge(src);
assert(map_equal(src, {}));
assert(map_equal(dst, {{1, 0}, {2, 0}, {3, 0}, {4, 0}, {5, 0}, {5, 0}}));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
bool do_throw = false;
typedef std::unordered_multimap<Counter<int>, int, throw_hasher<Counter<int>>> map_type;
map_type src({{1, 0}, {3, 0}, {5, 0}}, 0, throw_hasher<Counter<int>>(do_throw));
map_type dst({{2, 0}, {4, 0}, {5, 0}}, 0, throw_hasher<Counter<int>>(do_throw));
assert(Counter_base::gConstructed == 6);
do_throw = true;
try
{
dst.merge(src);
}
catch (int)
{
do_throw = false;
}
assert(!do_throw);
assert(map_equal(src, map_type({{1, 0}, {3, 0}, {5, 0}}, 0, throw_hasher<Counter<int>>(do_throw))));
assert(map_equal(dst, map_type({{2, 0}, {4, 0}, {5, 0}}, 0, throw_hasher<Counter<int>>(do_throw))));
}
#endif
assert(Counter_base::gConstructed == 0);
struct equal
{
equal() = default;
bool operator()(const Counter<int>& lhs, const Counter<int>& rhs) const
{
return lhs == rhs;
}
};
struct hasher
{
hasher() = default;
size_t operator()(const Counter<int>& p) const
{
return std::hash<Counter<int>>()(p);
}
};
{
typedef std::unordered_multimap<Counter<int>, int, std::hash<Counter<int>>, std::equal_to<Counter<int>>> first_map_type;
typedef std::unordered_multimap<Counter<int>, int, hasher, equal> second_map_type;
typedef std::unordered_map<Counter<int>, int, hasher, equal> third_map_type;
{
first_map_type first{{1, 0}, {2, 0}, {3, 0}};
second_map_type second{{2, 0}, {3, 0}, {4, 0}};
third_map_type third{{1, 0}, {3, 0}};
assert(Counter_base::gConstructed == 8);
first.merge(second);
first.merge(third);
assert(map_equal(first, {{1, 0}, {2, 0}, {3, 0}, {4, 0}, {2, 0}, {3, 0}, {1, 0}, {3, 0}}));
assert(map_equal(second, {}));
assert(map_equal(third, {}));
assert(Counter_base::gConstructed == 8);
}
assert(Counter_base::gConstructed == 0);
{
first_map_type first{{1, 0}, {2, 0}, {3, 0}};
second_map_type second{{2, 0}, {3, 0}, {4, 0}};
third_map_type third{{1, 0}, {3, 0}};
assert(Counter_base::gConstructed == 8);
first.merge(std::move(second));
first.merge(std::move(third));
assert(map_equal(first, {{1, 0}, {2, 0}, {3, 0}, {4, 0}, {2, 0}, {3, 0}, {1, 0}, {3, 0}}));
assert(map_equal(second, {}));
assert(map_equal(third, {}));
assert(Counter_base::gConstructed == 8);
}
assert(Counter_base::gConstructed == 0);
}
{
std::unordered_multimap<int, int> first;
{
std::unordered_multimap<int, int> second;
first.merge(second);
first.merge(std::move(second));
}
{
std::unordered_map<int, int> second;
first.merge(second);
first.merge(std::move(second));
}
}
}
|
