forked from boostorg/core
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathfunctor_test.cpp
More file actions
202 lines (165 loc) · 5.72 KB
/
functor_test.cpp
File metadata and controls
202 lines (165 loc) · 5.72 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
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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
* Copyright Andrey Semashev 2024.
* 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)
*/
/*!
* \file functor_test.cpp
* \author Andrey Semashev
* \date 2024-01-23
*
* This file contains tests for \c boost::core::functor.
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX17_AUTO_NONTYPE_TEMPLATE_PARAMS)
#include <boost/core/functor.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#if (defined(__cpp_lib_is_invocable) && (__cpp_lib_is_invocable >= 201703l)) || \
(defined(BOOST_MSSTL_VERSION) && (BOOST_MSSTL_VERSION >= 140) && (BOOST_CXX_VERSION >= 201703l))
namespace test {
using std::is_invocable;
} // namespace test
#else
namespace test {
// A simplified implementation that does not support member function pointers
template< typename Func, typename... Args >
struct is_invocable_impl
{
template< typename F = Func, typename = decltype(std::declval< F >()(std::declval< Args >()...)) >
static std::true_type _check_invocable(int);
static std::false_type _check_invocable(...);
typedef decltype(is_invocable_impl::_check_invocable(0)) type;
};
template< typename Func, typename... Args >
struct is_invocable : public is_invocable_impl< Func, Args... >::type { };
} // namespace test
#endif
int g_n = 0;
void void_func()
{
++g_n;
}
int int_func()
{
return ++g_n;
}
int& int_ref_func()
{
++g_n;
return g_n;
}
void void_add1(int x)
{
g_n += x;
}
int add2(int x, int y)
{
return x + y;
}
namespace test_ns {
int add3(int x, int y, int z)
{
return x + y + z;
}
} // namespace test_ns
int int_func_noexcept() noexcept
{
return ++g_n;
}
int main()
{
{
boost::core::functor< void_func > fun;
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_func >& >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_func > const& >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< void_func > const&, int >));
BOOST_TEST_EQ(noexcept(fun()), false);
fun();
BOOST_TEST_EQ(g_n, 1);
fun();
BOOST_TEST_EQ(g_n, 2);
}
g_n = 0;
{
boost::core::functor< int_func > fun;
int res = fun();
BOOST_TEST_EQ(res, 1);
BOOST_TEST_EQ(g_n, 1);
res = fun();
BOOST_TEST_EQ(res, 2);
BOOST_TEST_EQ(g_n, 2);
}
g_n = 0;
{
boost::core::functor< int_ref_func > fun;
int& res1 = fun();
BOOST_TEST_EQ(&res1, &g_n);
BOOST_TEST_EQ(res1, 1);
int& res2 = fun();
BOOST_TEST_EQ(&res2, &g_n);
BOOST_TEST_EQ(res2, 2);
}
g_n = 0;
{
boost::core::functor< void_add1 > fun;
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< void_add1 >& >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< void_add1 > const& >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_add1 >&, int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_add1 > const&, int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_add1 >&, short int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< void_add1 > const&, short int >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< void_add1 > const&, int, int >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< void_add1 > const&, const char* >));
fun(10);
BOOST_TEST_EQ(g_n, 10);
fun(20);
BOOST_TEST_EQ(g_n, 30);
}
{
boost::core::functor< add2 > fun;
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 >& >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 > const& >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 >&, int >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 > const&, int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< add2 >&, int, int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< add2 > const&, int, int >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< add2 >&, short int, signed char >));
BOOST_TEST_TRAIT_TRUE((test::is_invocable< boost::core::functor< add2 > const&, short int, signed char >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 > const&, const char* >));
BOOST_TEST_TRAIT_FALSE((test::is_invocable< boost::core::functor< add2 > const&, const char*, float >));
int res = fun(10, 20);
BOOST_TEST_EQ(res, 30);
res = fun(30, 40);
BOOST_TEST_EQ(res, 70);
}
{
boost::core::functor< test_ns::add3 > fun;
int res = fun(10, 20, 30);
BOOST_TEST_EQ(res, 60);
res = fun(40, 50, 60);
BOOST_TEST_EQ(res, 150);
}
g_n = 0;
{
boost::core::functor< int_func_noexcept > fun;
BOOST_TEST_EQ(noexcept(fun()), true);
int res = fun();
BOOST_TEST_EQ(res, 1);
BOOST_TEST_EQ(g_n, 1);
res = fun();
BOOST_TEST_EQ(res, 2);
BOOST_TEST_EQ(g_n, 2);
}
return boost::report_errors();
}
#else // !defined(BOOST_NO_CXX17_AUTO_NONTYPE_TEMPLATE_PARAMS)
#include <boost/config/pragma_message.hpp>
BOOST_PRAGMA_MESSAGE("Test skipped because C++17 auto non-type template parameters are not supported")
int main()
{
return 0;
}
#endif // !defined(BOOST_NO_CXX17_AUTO_NONTYPE_TEMPLATE_PARAMS)