swap.pass.cpp
3.75 KB
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
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <functional>
// class function<R(ArgTypes...)>
// template <MoveConstructible R, MoveConstructible ... ArgTypes>
// void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&) noexcept;
// This test runs in C++03, but we have deprecated using std::function in C++03.
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
#include <functional>
#include <cstdlib>
#include <cassert>
#include "test_macros.h"
#include "count_new.h"
class A
{
int data_[10];
public:
static int count;
explicit A(int j)
{
++count;
data_[0] = j;
}
A(const A& a)
{
++count;
for (int i = 0; i < 10; ++i)
data_[i] = a.data_[i];
}
~A() {--count;}
int operator()(int i) const
{
for (int j = 0; j < 10; ++j)
i += data_[j];
return i;
}
int id() const {return data_[0];}
};
int A::count = 0;
int g(int) {return 0;}
int h(int) {return 1;}
int main(int, char**)
{
globalMemCounter.reset();
assert(globalMemCounter.checkOutstandingNewEq(0));
{
std::function<int(int)> f1 = A(1);
std::function<int(int)> f2 = A(2);
#if TEST_STD_VER >= 11
static_assert(noexcept(swap(f1, f2)), "" );
#endif
assert(A::count == 2);
assert(globalMemCounter.checkOutstandingNewEq(2));
assert(f1.target<A>()->id() == 1);
assert(f2.target<A>()->id() == 2);
swap(f1, f2);
assert(A::count == 2);
assert(globalMemCounter.checkOutstandingNewEq(2));
assert(f1.target<A>()->id() == 2);
assert(f2.target<A>()->id() == 1);
}
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
{
std::function<int(int)> f1 = A(1);
std::function<int(int)> f2 = g;
#if TEST_STD_VER >= 11
static_assert(noexcept(swap(f1, f2)), "" );
#endif
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(f1.target<A>()->id() == 1);
assert(*f2.target<int(*)(int)>() == g);
swap(f1, f2);
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(*f1.target<int(*)(int)>() == g);
assert(f2.target<A>()->id() == 1);
}
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
{
std::function<int(int)> f1 = g;
std::function<int(int)> f2 = A(1);
#if TEST_STD_VER >= 11
static_assert(noexcept(swap(f1, f2)), "" );
#endif
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(*f1.target<int(*)(int)>() == g);
assert(f2.target<A>()->id() == 1);
swap(f1, f2);
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(f1.target<A>()->id() == 1);
assert(*f2.target<int(*)(int)>() == g);
}
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
{
std::function<int(int)> f1 = g;
std::function<int(int)> f2 = h;
#if TEST_STD_VER >= 11
static_assert(noexcept(swap(f1, f2)), "" );
#endif
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
assert(*f1.target<int(*)(int)>() == g);
assert(*f2.target<int(*)(int)>() == h);
swap(f1, f2);
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
assert(*f1.target<int(*)(int)>() == h);
assert(*f2.target<int(*)(int)>() == g);
}
assert(A::count == 0);
assert(globalMemCounter.checkOutstandingNewEq(0));
return 0;
}