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
158
159
160
161
162
163
164
165
166
167
168
169
|
//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2014-2014.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/move for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#include <boost/move/detail/config_begin.hpp>
#include <boost/move/adl_move_swap.hpp>
#include <boost/move/core.hpp>
#include <boost/core/lightweight_test.hpp>
class swap_stats
{
public:
static void reset_stats()
{
member_swap_calls = 0;
friend_swap_calls = 0;
move_cnstor_calls = 0;
move_assign_calls = 0;
copy_cnstor_calls = 0;
copy_assign_calls = 0;
}
static unsigned int member_swap_calls;
static unsigned int friend_swap_calls;
static unsigned int move_cnstor_calls;
static unsigned int move_assign_calls;
static unsigned int copy_cnstor_calls;
static unsigned int copy_assign_calls;
};
unsigned int swap_stats::member_swap_calls = 0;
unsigned int swap_stats::friend_swap_calls = 0;
unsigned int swap_stats::move_cnstor_calls = 0;
unsigned int swap_stats::move_assign_calls = 0;
unsigned int swap_stats::copy_cnstor_calls = 0;
unsigned int swap_stats::copy_assign_calls = 0;
class movable : public swap_stats
{
BOOST_MOVABLE_BUT_NOT_COPYABLE(movable)
public:
movable() {}
movable(BOOST_RV_REF(movable)) { ++move_cnstor_calls; }
movable & operator=(BOOST_RV_REF(movable)){ ++move_assign_calls; return *this; }
friend void swap(movable &, movable &) { ++friend_swap_calls; }
};
class movable_swap_member : public swap_stats
{
BOOST_MOVABLE_BUT_NOT_COPYABLE(movable_swap_member)
public:
movable_swap_member() {}
movable_swap_member(BOOST_RV_REF(movable_swap_member)) { ++move_cnstor_calls; }
movable_swap_member & operator=(BOOST_RV_REF(movable_swap_member)){ ++move_assign_calls; return *this; }
void swap(movable_swap_member &) { ++member_swap_calls; }
friend void swap(movable_swap_member &, movable_swap_member &) { ++friend_swap_calls; }
};
class copyable : public swap_stats
{
public:
copyable() {}
copyable(const copyable &) { ++copy_cnstor_calls; }
copyable & operator=(const copyable&) { ++copy_assign_calls; return *this; }
void swap(copyable &) { ++member_swap_calls; }
friend void swap(copyable &, copyable &) { ++friend_swap_calls; }
};
class no_swap : public swap_stats
{
private: unsigned m_state;
public:
explicit no_swap(unsigned i): m_state(i){}
no_swap(const no_swap &x) { m_state = x.m_state; ++copy_cnstor_calls; }
no_swap & operator=(const no_swap& x) { m_state = x.m_state; ++copy_assign_calls; return *this; }
void swap(no_swap &) { ++member_swap_calls; }
friend bool operator==(const no_swap &x, const no_swap &y) { return x.m_state == y.m_state; }
friend bool operator!=(const no_swap &x, const no_swap &y) { return !(x==y); }
};
int main()
{
{ //movable
movable x, y;
swap_stats::reset_stats();
::boost::adl_move_swap(x, y);
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
//In non rvalue reference compilers,
//movable classes with no swap() member uses
//boost::move() to implement swap.
BOOST_TEST(swap_stats::friend_swap_calls == 0);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::move_cnstor_calls == 1);
BOOST_TEST(swap_stats::move_assign_calls == 2);
BOOST_TEST(swap_stats::copy_cnstor_calls == 0);
BOOST_TEST(swap_stats::copy_assign_calls == 0);
#else
//In compilers with rvalue references, this should call friend swap via ADL
BOOST_TEST(swap_stats::friend_swap_calls == 1);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::move_cnstor_calls == 0);
BOOST_TEST(swap_stats::move_assign_calls == 0);
BOOST_TEST(swap_stats::copy_cnstor_calls == 0);
BOOST_TEST(swap_stats::copy_assign_calls == 0);
#endif
}
{ //movable_swap_member
movable_swap_member x, y;
swap_stats::reset_stats();
::boost::adl_move_swap(x, y);
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
//In non rvalue reference compilers,
//movable classes with no swap() member uses
//boost::move() to implement swap.
BOOST_TEST(swap_stats::friend_swap_calls == 0);
BOOST_TEST(swap_stats::member_swap_calls == 1);
BOOST_TEST(swap_stats::move_cnstor_calls == 0);
BOOST_TEST(swap_stats::move_assign_calls == 0);
BOOST_TEST(swap_stats::copy_cnstor_calls == 0);
BOOST_TEST(swap_stats::copy_assign_calls == 0);
#else
//In compilers with rvalue references, this should call friend swap via ADL
BOOST_TEST(swap_stats::friend_swap_calls == 1);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::move_cnstor_calls == 0);
BOOST_TEST(swap_stats::move_assign_calls == 0);
BOOST_TEST(swap_stats::copy_cnstor_calls == 0);
BOOST_TEST(swap_stats::copy_assign_calls == 0);
#endif
}
{ //copyable
copyable x, y;
swap_stats::reset_stats();
::boost::adl_move_swap(x, y);
//This should call friend swap via ADL
BOOST_TEST(swap_stats::friend_swap_calls == 1);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::move_cnstor_calls == 0);
BOOST_TEST(swap_stats::move_assign_calls == 0);
BOOST_TEST(swap_stats::copy_cnstor_calls == 0);
BOOST_TEST(swap_stats::copy_assign_calls == 0);
}
{ //no_swap
no_swap x(1), y(2), x_back(x), y_back(y);
swap_stats::reset_stats();
::boost::adl_move_swap(x, y);
//This should call std::swap which uses copies
BOOST_TEST(swap_stats::friend_swap_calls == 0);
BOOST_TEST(swap_stats::member_swap_calls == 0);
BOOST_TEST(swap_stats::move_cnstor_calls == 0);
BOOST_TEST(swap_stats::move_assign_calls == 0);
BOOST_TEST(swap_stats::copy_cnstor_calls == 1);
BOOST_TEST(swap_stats::copy_assign_calls == 2);
BOOST_TEST(x == y_back);
BOOST_TEST(y == x_back);
BOOST_TEST(x != y);
}
return ::boost::report_errors();
}
#include <boost/move/detail/config_end.hpp>
|
