1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// type_traits
10
11// member_function_pointer
12
13#include <type_traits>
14#include "test_macros.h"
15
16// NOTE: On Windows the function `test_is_member_function<void()>` and
17// `test_is_member_function<void() noexcept> has the same mangled despite being
18// a distinct instantiation. This causes Clang to emit an error. However
19// structs do not have this problem.
20template <class T>
21struct test_member_function_pointer_imp {
22 static_assert(!std::is_void<T>::value, "");
23#if TEST_STD_VER > 11
24 static_assert(!std::is_null_pointer<T>::value, "");
25#endif
26 static_assert(!std::is_integral<T>::value, "");
27 static_assert(!std::is_floating_point<T>::value, "");
28 static_assert(!std::is_array<T>::value, "");
29 static_assert(!std::is_pointer<T>::value, "");
30 static_assert(!std::is_lvalue_reference<T>::value, "");
31 static_assert(!std::is_rvalue_reference<T>::value, "");
32 static_assert(!std::is_member_object_pointer<T>::value, "");
33 static_assert( std::is_member_function_pointer<T>::value, "");
34 static_assert(!std::is_enum<T>::value, "");
35 static_assert(!std::is_union<T>::value, "");
36 static_assert(!std::is_class<T>::value, "");
37 static_assert(!std::is_function<T>::value, "");
38};
39
40template <class T>
41struct test_member_function_pointer :
42 test_member_function_pointer_imp<T>,
43 test_member_function_pointer_imp<const T>,
44 test_member_function_pointer_imp<volatile T>,
45 test_member_function_pointer_imp<const volatile T>
46{
47};
48
49class Class
50{
51};
52
53struct incomplete_type;
54
55int main(int, char**)
56{
57 test_member_function_pointer<void (Class::*)()>();
58 test_member_function_pointer<void (Class::*)(int)>();
59 test_member_function_pointer<void (Class::*)(int, char)>();
60
61 test_member_function_pointer<void (Class::*)() const>();
62 test_member_function_pointer<void (Class::*)(int) const>();
63 test_member_function_pointer<void (Class::*)(int, char) const>();
64
65 test_member_function_pointer<void (Class::*)() volatile>();
66 test_member_function_pointer<void (Class::*)(int) volatile>();
67 test_member_function_pointer<void (Class::*)(int, char) volatile>();
68
69 test_member_function_pointer<void (Class::*)(...)>();
70 test_member_function_pointer<void (Class::*)(int, ...)>();
71 test_member_function_pointer<void (Class::*)(int, char, ...)>();
72
73 test_member_function_pointer<void (Class::*)(...) const>();
74 test_member_function_pointer<void (Class::*)(int, ...) const>();
75 test_member_function_pointer<void (Class::*)(int, char, ...) const>();
76
77 test_member_function_pointer<void (Class::*)(...) volatile>();
78 test_member_function_pointer<void (Class::*)(int, ...) volatile>();
79 test_member_function_pointer<void (Class::*)(int, char, ...) volatile>();
80
81
82// reference qualifiers on functions are a C++11 extension
83#if TEST_STD_VER >= 11
84 // Noexcept qualifiers
85 test_member_function_pointer<void (Class::*)() noexcept>();
86 test_member_function_pointer<void (Class::*)(int) noexcept>();
87 test_member_function_pointer<void (Class::*)(int, char) noexcept>();
88
89 test_member_function_pointer<void (Class::*)() const noexcept>();
90 test_member_function_pointer<void (Class::*)(int) const noexcept>();
91 test_member_function_pointer<void (Class::*)(int, char) const noexcept>();
92
93 test_member_function_pointer<void (Class::*)() volatile noexcept>();
94 test_member_function_pointer<void (Class::*)(int) volatile noexcept>();
95 test_member_function_pointer<void (Class::*)(int, char) volatile noexcept>();
96
97 test_member_function_pointer<void (Class::*)(...) noexcept>();
98 test_member_function_pointer<void (Class::*)(int, ...) noexcept>();
99 test_member_function_pointer<void (Class::*)(int, char, ...) noexcept>();
100
101 test_member_function_pointer<void (Class::*)(...) const noexcept>();
102 test_member_function_pointer<void (Class::*)(int, ...) const noexcept>();
103 test_member_function_pointer<void (Class::*)(int, char, ...) const noexcept>();
104
105 test_member_function_pointer<void (Class::*)(...) volatile noexcept>();
106 test_member_function_pointer<void (Class::*)(int, ...) volatile noexcept>();
107 test_member_function_pointer<void (Class::*)(int, char, ...) volatile noexcept>();
108
109 // lvalue qualifiers
110 test_member_function_pointer<void (Class::*)() &>();
111 test_member_function_pointer<void (Class::*)(int) &>();
112 test_member_function_pointer<void (Class::*)(int, char) &>();
113 test_member_function_pointer<void (Class::*)(...) &>();
114 test_member_function_pointer<void (Class::*)(int,...) &>();
115 test_member_function_pointer<void (Class::*)(int, char,...) &>();
116
117 test_member_function_pointer<void (Class::*)() const &>();
118 test_member_function_pointer<void (Class::*)(int) const &>();
119 test_member_function_pointer<void (Class::*)(int, char) const &>();
120 test_member_function_pointer<void (Class::*)(...) const &>();
121 test_member_function_pointer<void (Class::*)(int,...) const &>();
122 test_member_function_pointer<void (Class::*)(int, char,...) const &>();
123
124 test_member_function_pointer<void (Class::*)() volatile &>();
125 test_member_function_pointer<void (Class::*)(int) volatile &>();
126 test_member_function_pointer<void (Class::*)(int, char) volatile &>();
127 test_member_function_pointer<void (Class::*)(...) volatile &>();
128 test_member_function_pointer<void (Class::*)(int,...) volatile &>();
129 test_member_function_pointer<void (Class::*)(int, char,...) volatile &>();
130
131 test_member_function_pointer<void (Class::*)() const volatile &>();
132 test_member_function_pointer<void (Class::*)(int) const volatile &>();
133 test_member_function_pointer<void (Class::*)(int, char) const volatile &>();
134 test_member_function_pointer<void (Class::*)(...) const volatile &>();
135 test_member_function_pointer<void (Class::*)(int,...) const volatile &>();
136 test_member_function_pointer<void (Class::*)(int, char,...) const volatile &>();
137
138 // Lvalue qualifiers with noexcept
139 test_member_function_pointer<void (Class::*)() & noexcept>();
140 test_member_function_pointer<void (Class::*)(int) & noexcept>();
141 test_member_function_pointer<void (Class::*)(int, char) & noexcept>();
142 test_member_function_pointer<void (Class::*)(...) & noexcept>();
143 test_member_function_pointer<void (Class::*)(int,...) & noexcept>();
144 test_member_function_pointer<void (Class::*)(int, char,...) & noexcept>();
145
146 test_member_function_pointer<void (Class::*)() const & noexcept>();
147 test_member_function_pointer<void (Class::*)(int) const & noexcept>();
148 test_member_function_pointer<void (Class::*)(int, char) const & noexcept>();
149 test_member_function_pointer<void (Class::*)(...) const & noexcept>();
150 test_member_function_pointer<void (Class::*)(int,...) const & noexcept>();
151 test_member_function_pointer<void (Class::*)(int, char,...) const & noexcept>();
152
153 test_member_function_pointer<void (Class::*)() volatile & noexcept>();
154 test_member_function_pointer<void (Class::*)(int) volatile & noexcept>();
155 test_member_function_pointer<void (Class::*)(int, char) volatile & noexcept>();
156 test_member_function_pointer<void (Class::*)(...) volatile & noexcept>();
157 test_member_function_pointer<void (Class::*)(int,...) volatile & noexcept>();
158 test_member_function_pointer<void (Class::*)(int, char,...) volatile & noexcept>();
159
160 test_member_function_pointer<void (Class::*)() const volatile & noexcept>();
161 test_member_function_pointer<void (Class::*)(int) const volatile & noexcept>();
162 test_member_function_pointer<void (Class::*)(int, char) const volatile & noexcept>();
163 test_member_function_pointer<void (Class::*)(...) const volatile & noexcept>();
164 test_member_function_pointer<void (Class::*)(int,...) const volatile & noexcept>();
165 test_member_function_pointer<void (Class::*)(int, char,...) const volatile & noexcept>();
166
167 // RValue qualifiers
168 test_member_function_pointer<void (Class::*)() &&>();
169 test_member_function_pointer<void (Class::*)(int) &&>();
170 test_member_function_pointer<void (Class::*)(int, char) &&>();
171 test_member_function_pointer<void (Class::*)(...) &&>();
172 test_member_function_pointer<void (Class::*)(int,...) &&>();
173 test_member_function_pointer<void (Class::*)(int, char,...) &&>();
174
175 test_member_function_pointer<void (Class::*)() const &&>();
176 test_member_function_pointer<void (Class::*)(int) const &&>();
177 test_member_function_pointer<void (Class::*)(int, char) const &&>();
178 test_member_function_pointer<void (Class::*)(...) const &&>();
179 test_member_function_pointer<void (Class::*)(int,...) const &&>();
180 test_member_function_pointer<void (Class::*)(int, char,...) const &&>();
181
182 test_member_function_pointer<void (Class::*)() volatile &&>();
183 test_member_function_pointer<void (Class::*)(int) volatile &&>();
184 test_member_function_pointer<void (Class::*)(int, char) volatile &&>();
185 test_member_function_pointer<void (Class::*)(...) volatile &&>();
186 test_member_function_pointer<void (Class::*)(int,...) volatile &&>();
187 test_member_function_pointer<void (Class::*)(int, char,...) volatile &&>();
188
189 test_member_function_pointer<void (Class::*)() const volatile &&>();
190 test_member_function_pointer<void (Class::*)(int) const volatile &&>();
191 test_member_function_pointer<void (Class::*)(int, char) const volatile &&>();
192 test_member_function_pointer<void (Class::*)(...) const volatile &&>();
193 test_member_function_pointer<void (Class::*)(int,...) const volatile &&>();
194 test_member_function_pointer<void (Class::*)(int, char,...) const volatile &&>();
195
196 // RValue qualifiers with noexcept
197 test_member_function_pointer<void (Class::*)() && noexcept>();
198 test_member_function_pointer<void (Class::*)(int) && noexcept>();
199 test_member_function_pointer<void (Class::*)(int, char) && noexcept>();
200 test_member_function_pointer<void (Class::*)(...) && noexcept>();
201 test_member_function_pointer<void (Class::*)(int,...) && noexcept>();
202 test_member_function_pointer<void (Class::*)(int, char,...) && noexcept>();
203
204 test_member_function_pointer<void (Class::*)() const && noexcept>();
205 test_member_function_pointer<void (Class::*)(int) const && noexcept>();
206 test_member_function_pointer<void (Class::*)(int, char) const && noexcept>();
207 test_member_function_pointer<void (Class::*)(...) const && noexcept>();
208 test_member_function_pointer<void (Class::*)(int,...) const && noexcept>();
209 test_member_function_pointer<void (Class::*)(int, char,...) const && noexcept>();
210
211 test_member_function_pointer<void (Class::*)() volatile && noexcept>();
212 test_member_function_pointer<void (Class::*)(int) volatile && noexcept>();
213 test_member_function_pointer<void (Class::*)(int, char) volatile && noexcept>();
214 test_member_function_pointer<void (Class::*)(...) volatile && noexcept>();
215 test_member_function_pointer<void (Class::*)(int,...) volatile && noexcept>();
216 test_member_function_pointer<void (Class::*)(int, char,...) volatile && noexcept>();
217
218 test_member_function_pointer<void (Class::*)() const volatile && noexcept>();
219 test_member_function_pointer<void (Class::*)(int) const volatile && noexcept>();
220 test_member_function_pointer<void (Class::*)(int, char) const volatile && noexcept>();
221 test_member_function_pointer<void (Class::*)(...) const volatile && noexcept>();
222 test_member_function_pointer<void (Class::*)(int,...) const volatile && noexcept>();
223 test_member_function_pointer<void (Class::*)(int, char,...) const volatile && noexcept>();
224#endif
225
226// LWG#2582
227 static_assert(!std::is_member_function_pointer<incomplete_type>::value, "");
228
229 return 0;
230}
231

source code of libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/member_function_pointer.pass.cpp