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7adcbafe | 1 | // Copyright (C) 2016-2022 Free Software Foundation, Inc. |
7dcc645c JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
6458742a | 18 | // { dg-do compile { target c++17 } } |
7dcc645c JW |
19 | |
20 | #include <type_traits> | |
21 | ||
22 | #ifndef IS_INVOCABLE_DEFINED | |
23 | template<typename... T> | |
24 | constexpr bool is_invocable() | |
25 | { | |
26 | constexpr bool result = std::is_invocable_v<T...>; | |
27 | static_assert(std::is_invocable<T...>::value == result); | |
28 | return result; | |
29 | } | |
30 | ||
31 | template<typename R, typename... T> | |
32 | constexpr bool is_invocable_r() | |
33 | { | |
34 | constexpr bool result = std::is_invocable_r_v<R, T...>; | |
35 | static_assert(std::is_invocable_r<R, T...>::value == result); | |
36 | return result; | |
37 | } | |
38 | #endif | |
39 | ||
40 | void test01() | |
41 | { | |
42 | using func_type_v0 = void(*)(); | |
43 | ||
44 | static_assert( is_invocable< func_type_v0 >(), ""); | |
45 | static_assert( is_invocable_r<void, func_type_v0 >(), ""); | |
46 | static_assert( ! is_invocable_r<void*, func_type_v0 >(), ""); | |
47 | static_assert( ! is_invocable_r<int, func_type_v0 >(), ""); | |
48 | ||
49 | static_assert( ! is_invocable< func_type_v0, int >(), ""); | |
50 | static_assert( ! is_invocable_r< void, func_type_v0, int >(), ""); | |
51 | static_assert( ! is_invocable_r< void*, func_type_v0, int >(), ""); | |
52 | static_assert( ! is_invocable_r< int, func_type_v0, int >(), ""); | |
53 | ||
54 | using func_type_i0 = int(*)(); | |
55 | ||
56 | static_assert( is_invocable< func_type_i0 >(), ""); | |
57 | static_assert( is_invocable_r<void, func_type_i0 >(), ""); | |
58 | static_assert( is_invocable_r<int, func_type_i0 >(), ""); | |
59 | static_assert( ! is_invocable_r<int&, func_type_i0 >(), ""); | |
60 | static_assert( is_invocable_r<long, func_type_i0 >(), ""); | |
61 | ||
62 | static_assert( ! is_invocable< func_type_i0, int >(), ""); | |
63 | static_assert( ! is_invocable_r< void, func_type_i0, int >(), ""); | |
64 | static_assert( ! is_invocable_r< int, func_type_i0, int >(), ""); | |
65 | static_assert( ! is_invocable_r< int&, func_type_i0, int >(), ""); | |
66 | static_assert( ! is_invocable_r< long, func_type_i0, int >(), ""); | |
67 | ||
68 | using func_type_l0 = int&(*)(); | |
69 | ||
70 | static_assert( is_invocable< func_type_l0 >(), ""); | |
71 | static_assert( is_invocable_r< void, func_type_l0 >(), ""); | |
72 | static_assert( is_invocable_r< int, func_type_l0 >(), ""); | |
73 | static_assert( is_invocable_r< int&, func_type_l0 >(), ""); | |
74 | static_assert( ! is_invocable_r< int&&, func_type_l0 >(), ""); | |
75 | static_assert( is_invocable_r< long, func_type_l0 >(), ""); | |
76 | static_assert( ! is_invocable_r< long&, func_type_l0 >(), ""); | |
77 | ||
78 | static_assert( ! is_invocable< func_type_l0(int) >(), ""); | |
79 | static_assert( ! is_invocable_r< void, func_type_l0, int >(), ""); | |
80 | static_assert( ! is_invocable_r< int, func_type_l0, int >(), ""); | |
81 | static_assert( ! is_invocable_r< int&, func_type_l0, int >(), ""); | |
82 | static_assert( ! is_invocable_r< long, func_type_l0, int >(), ""); | |
83 | ||
84 | using func_type_ii = int(*)(int); | |
85 | ||
86 | static_assert( ! is_invocable< func_type_ii >(), ""); | |
87 | static_assert( ! is_invocable_r< int, func_type_ii >(), ""); | |
88 | static_assert( ! is_invocable_r< int&, func_type_ii >(), ""); | |
89 | static_assert( ! is_invocable_r< long, func_type_ii >(), ""); | |
90 | ||
91 | static_assert( is_invocable< func_type_ii, int >(), ""); | |
92 | static_assert( is_invocable_r< int, func_type_ii, int >(), ""); | |
93 | static_assert( ! is_invocable_r< int&, func_type_ii, int >(), ""); | |
94 | static_assert( is_invocable_r< long, func_type_ii, int >(), ""); | |
95 | ||
96 | using func_type_il = int(*)(int&); | |
97 | ||
98 | static_assert( ! is_invocable< func_type_il >(), ""); | |
99 | ||
100 | static_assert( ! is_invocable< func_type_il, int >(), ""); | |
101 | static_assert( ! is_invocable_r< int, func_type_il, int >(), ""); | |
102 | static_assert( ! is_invocable_r< int&, func_type_il, int >(), ""); | |
103 | static_assert( ! is_invocable_r< long, func_type_il, int >(), ""); | |
104 | ||
105 | static_assert( is_invocable< func_type_il, int& >(), ""); | |
106 | static_assert( is_invocable_r< int, func_type_il, int& >(), ""); | |
107 | static_assert( ! is_invocable_r< int&, func_type_il, int& >(), ""); | |
108 | static_assert( is_invocable_r< long, func_type_il, int& >(), ""); | |
109 | ||
110 | using func_type_ir = int(*)(int&&); | |
111 | ||
112 | static_assert( ! is_invocable< func_type_ir >(), ""); | |
113 | ||
114 | static_assert( is_invocable< func_type_ir, int >(), ""); | |
115 | static_assert( is_invocable_r< int, func_type_ir, int >(), ""); | |
116 | static_assert( ! is_invocable_r< int&, func_type_ir, int >(), ""); | |
117 | static_assert( is_invocable_r< long, func_type_ir, int >(), ""); | |
118 | ||
119 | static_assert( ! is_invocable< func_type_ir, int& >(), ""); | |
120 | static_assert( ! is_invocable_r< int, func_type_ir, int& >(), ""); | |
121 | static_assert( ! is_invocable_r< int&, func_type_ir, int& >(), ""); | |
122 | static_assert( ! is_invocable_r< long, func_type_ir, int& >(), ""); | |
123 | ||
124 | struct X { }; | |
125 | ||
126 | using mem_type_i = int X::*; | |
127 | ||
128 | static_assert( ! is_invocable< mem_type_i >(), ""); | |
129 | ||
130 | static_assert( ! is_invocable< mem_type_i, int >(), ""); | |
131 | static_assert( ! is_invocable_r< int, mem_type_i, int >(), ""); | |
132 | static_assert( ! is_invocable_r< int&, mem_type_i, int >(), ""); | |
133 | static_assert( ! is_invocable_r< long, mem_type_i, int >(), ""); | |
134 | ||
135 | static_assert( ! is_invocable< mem_type_i, int& >(), ""); | |
136 | static_assert( ! is_invocable_r< int, mem_type_i, int& >(), ""); | |
137 | static_assert( ! is_invocable_r< int&, mem_type_i, int& >(), ""); | |
138 | static_assert( ! is_invocable_r< long, mem_type_i, int& >(), ""); | |
139 | ||
140 | static_assert( is_invocable< mem_type_i, X& >(), ""); | |
141 | static_assert( is_invocable_r< int, mem_type_i, X& >(), ""); | |
142 | static_assert( is_invocable_r< int&, mem_type_i, X& >(), ""); | |
143 | static_assert( is_invocable_r< long, mem_type_i, X& >(), ""); | |
144 | ||
145 | using memfun_type_i = int (X::*)(); | |
146 | ||
147 | static_assert( ! is_invocable< memfun_type_i >(), ""); | |
148 | ||
149 | static_assert( ! is_invocable< memfun_type_i, int >(), ""); | |
150 | ||
151 | static_assert( ! is_invocable< memfun_type_i, int& >(), ""); | |
152 | ||
153 | static_assert( is_invocable< memfun_type_i, X& >(), ""); | |
154 | static_assert( is_invocable_r< int, memfun_type_i, X& >(), ""); | |
155 | static_assert( ! is_invocable_r< int&, memfun_type_i, X& >(), ""); | |
156 | static_assert( is_invocable_r< long, memfun_type_i, X& >(), ""); | |
157 | static_assert( is_invocable< memfun_type_i, X* >(), ""); | |
158 | ||
159 | static_assert( ! is_invocable< memfun_type_i, const X& >(), ""); | |
160 | static_assert( ! is_invocable_r< int, memfun_type_i, const X& >(), ""); | |
161 | static_assert( ! is_invocable< memfun_type_i, X&, int >(), ""); | |
162 | ||
163 | using memfun_type_iic = int& (X::*)(int&) const; | |
164 | ||
165 | static_assert( ! is_invocable< memfun_type_iic >(), ""); | |
166 | static_assert( ! is_invocable< memfun_type_iic, int >(), ""); | |
167 | static_assert( ! is_invocable< memfun_type_iic, int& >(), ""); | |
168 | static_assert( ! is_invocable< memfun_type_iic, X&, int >(), ""); | |
169 | static_assert( ! is_invocable< memfun_type_iic, const X&, int >(), ""); | |
170 | static_assert( ! is_invocable< memfun_type_iic, const X&, int&, int >(), ""); | |
171 | ||
172 | static_assert( is_invocable< memfun_type_iic, const X&, int& >(), ""); | |
173 | static_assert( is_invocable_r< int, memfun_type_iic, const X&, int& >(), ""); | |
174 | static_assert( is_invocable_r< int&, memfun_type_iic, const X&, int& >(), ""); | |
175 | static_assert( is_invocable_r< long, memfun_type_iic, const X&, int& >(), ""); | |
176 | static_assert( ! is_invocable_r< long&, memfun_type_iic, const X&, int& >(),""); | |
177 | static_assert( is_invocable< memfun_type_iic, const X*, int& >(), ""); | |
178 | ||
179 | struct F { | |
180 | int& operator()(); | |
181 | long& operator()() const; | |
182 | short& operator()(int) &&; | |
183 | char& operator()(int) const&; | |
184 | private: | |
185 | void operator()(int, int); | |
186 | }; | |
187 | using CF = const F; | |
188 | ||
189 | static_assert( is_invocable_r< int&, F >(), ""); | |
190 | static_assert( is_invocable_r< int&, F& >(), ""); | |
191 | static_assert( is_invocable_r< long&, CF >(), ""); | |
192 | static_assert( is_invocable_r< long&, CF& >(), ""); | |
193 | static_assert( is_invocable_r< short&, F, int >(), ""); | |
194 | static_assert( is_invocable_r< char&, F&, int >(), ""); | |
195 | static_assert( is_invocable_r< char&, CF, int >(), ""); | |
196 | static_assert( is_invocable_r< char&, CF&, int >(), ""); | |
197 | ||
198 | static_assert( ! is_invocable< F, int, int >(), ""); | |
199 | } |