1 // { dg-additional-options "-Wno-deprecated" { target c++2a } }
2 // { dg-do compile { target c++17 } }
4 // Copyright (C) 2014-2022 Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
21 #include <type_traits>
25 // These tests are rather simple, the front-end tests already test
26 // variable templates, and the library tests for the underlying
27 // traits are more elaborate. These are just simple sanity tests.
29 static_assert(is_void_v
<void> && is_void
<void>::value
, "");
30 static_assert(!is_void_v
<int> && !is_void
<int>::value
, "");
32 static_assert(is_null_pointer_v
<nullptr_t
>
33 && is_null_pointer
<nullptr_t
>::value
, "");
34 static_assert(!is_null_pointer_v
<void*>
35 && !is_null_pointer
<void*>::value
, "");
37 static_assert(is_integral_v
<int> && is_integral
<int>::value
, "");
38 static_assert(!is_integral_v
<int*> && !is_integral
<int*>::value
, "");
40 static_assert(is_floating_point_v
<float>
41 && is_floating_point
<float>::value
, "");
42 static_assert(!is_floating_point_v
<int>
43 && !is_floating_point
<int>::value
, "");
45 static_assert(is_array_v
<char[42]> && is_array
<char[42]>::value
, "");
46 static_assert(!is_array_v
<char*> && !is_array
<char*>::value
, "");
48 static_assert(is_pointer_v
<int*> && is_pointer
<int*>::value
, "");
49 static_assert(!is_pointer_v
<int> && !is_pointer
<int>::value
, "");
51 static_assert(is_lvalue_reference_v
<int&>
52 && is_lvalue_reference
<int&>::value
, "");
53 static_assert(!is_lvalue_reference_v
<int>
54 && !is_lvalue_reference
<int>::value
, "");
56 static_assert(is_rvalue_reference_v
<int&&>
57 && is_rvalue_reference
<int&&>::value
, "");
58 static_assert(!is_rvalue_reference_v
<int>
59 && !is_rvalue_reference
<int>::value
, "");
61 struct EmptyFinal final
{};
63 static_assert(is_member_object_pointer_v
<int (EmptyFinal::*)>
64 && is_member_object_pointer
<int (EmptyFinal::*)>::value
, "");
65 static_assert(!is_member_object_pointer_v
<void*>
66 && !is_member_object_pointer
<void*>::value
, "");
68 static_assert(is_member_function_pointer_v
<int (EmptyFinal::*)()>
69 && is_member_function_pointer
<int (EmptyFinal::*)()>::value
, "");
70 static_assert(!is_member_function_pointer_v
<void*>
71 && !is_member_function_pointer
<void*>::value
, "");
75 static_assert(is_enum_v
<Enum
> && is_enum
<Enum
>::value
, "");
76 static_assert(!is_enum_v
<int> && !is_enum
<int>::value
, "");
80 static_assert(is_union_v
<Union
> && is_union
<Union
>::value
, "");
81 static_assert(!is_union_v
<int> && !is_union
<int>::value
, "");
83 static_assert(is_class_v
<EmptyFinal
> && is_class
<EmptyFinal
>::value
, "");
84 static_assert(!is_class_v
<int> && !is_class
<int>::value
, "");
86 static_assert(is_function_v
<void()> && is_function
<void()>::value
, "");
87 static_assert(!is_function_v
<void(*)()> && !is_function
<void(*)()>::value
, "");
89 static_assert(is_reference_v
<int&> && is_reference
<int&>::value
, "");
90 static_assert(!is_reference_v
<int> && !is_reference
<int>::value
, "");
92 static_assert(is_arithmetic_v
<int> && is_arithmetic
<int>::value
, "");
93 static_assert(!is_arithmetic_v
<void*> && !is_arithmetic
<void*>::value
, "");
95 static_assert(is_fundamental_v
<int> && is_fundamental
<int>::value
, "");
96 static_assert(!is_fundamental_v
<EmptyFinal
>
97 && !is_fundamental
<EmptyFinal
>::value
, "");
99 static_assert(is_object_v
<int> && is_object
<int>::value
, "");
100 static_assert(!is_object_v
<int&> && !is_object
<int&>::value
, "");
102 static_assert(is_scalar_v
<int> && is_scalar
<int>::value
, "");
103 static_assert(!is_scalar_v
<int&> && !is_scalar
<int&>::value
, "");
105 static_assert(is_compound_v
<EmptyFinal
>
106 && is_compound
<EmptyFinal
>::value
, "");
107 static_assert(!is_compound_v
<int> && !is_compound
<int>::value
, "");
109 static_assert(is_member_pointer_v
<int (EmptyFinal::*)>
110 && is_member_pointer
<int (EmptyFinal::*)>::value
, "");
111 static_assert(!is_member_pointer_v
<void*>
112 && !is_member_pointer
<void*>::value
, "");
114 static_assert(is_const_v
<const int> && is_const
<const int>::value
, "");
115 static_assert(!is_const_v
<int> && !is_const
<int>::value
, "");
117 static_assert(is_volatile_v
<volatile int>
118 && is_volatile
<volatile int>::value
, "");
119 static_assert(!is_volatile_v
<int> && !is_volatile
<int>::value
, "");
128 NType
& operator=(const NType
&);
132 static_assert(is_trivial_v
<int> && is_trivial
<int>::value
, "");
133 static_assert(!is_trivial_v
<NType
> && !is_trivial
<NType
>::value
, "");
135 static_assert(is_trivially_copyable_v
<int>
136 && is_trivially_copyable
<int>::value
, "");
137 static_assert(!is_trivially_copyable_v
<NType
>
138 && !is_trivially_copyable
<NType
>::value
, "");
140 static_assert(is_standard_layout_v
<int>
141 && is_standard_layout
<int>::value
, "");
142 static_assert(!is_standard_layout_v
<NType
>
143 && !is_standard_layout
<NType
>::value
, "");
145 // Deprecated in C++20
146 static_assert(is_pod_v
<int>
147 && is_pod
<int>::value
, "");
148 static_assert(!is_pod_v
<NType
>
149 && !is_pod
<NType
>::value
, "");
151 #pragma GCC diagnostic push
152 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
153 static_assert(is_literal_type_v
<int>
154 && is_literal_type
<int>::value
, "");
155 static_assert(!is_literal_type_v
<NType
>
156 && !is_literal_type
<NType
>::value
, "");
157 #pragma GCC diagnostic pop
159 static_assert(is_empty_v
<EmptyFinal
>
160 && is_empty
<EmptyFinal
>::value
, "");
161 static_assert(!is_empty_v
<NType
>
162 && !is_empty
<NType
>::value
, "");
164 struct Abstract
{protected: virtual ~Abstract() = 0;};
165 struct Poly
: Abstract
{virtual ~Poly();};
167 static_assert(is_polymorphic_v
<Poly
>
168 && is_polymorphic
<Poly
>::value
, "");
169 static_assert(!is_polymorphic_v
<EmptyFinal
>
170 && !is_polymorphic
<EmptyFinal
>::value
, "");
174 static_assert(is_abstract_v
<Abstract
>
175 && is_abstract
<Abstract
>::value
, "");
176 static_assert(!is_abstract_v
<EmptyFinal
>
177 && !is_abstract
<EmptyFinal
>::value
, "");
179 static_assert(is_final_v
<EmptyFinal
>
180 && is_final
<EmptyFinal
>::value
, "");
181 static_assert(!is_final_v
<Abstract
>
182 && !is_final
<Abstract
>::value
, "");
184 static_assert(is_signed_v
<int> && is_signed
<int>::value
, "");
185 static_assert(!is_signed_v
<unsigned int>
186 && !is_signed
<unsigned int>::value
, "");
188 static_assert(is_constructible_v
<int, int>
189 && is_constructible
<int, int>::value
, "");
190 static_assert(!is_constructible_v
<int, void*>
191 && !is_constructible
<int, void*>::value
, "");
193 static_assert(is_default_constructible_v
<int>
194 && is_default_constructible
<int>::value
, "");
195 static_assert(!is_default_constructible_v
<NType
>
196 && !is_default_constructible
<NType
>::value
, "");
198 static_assert(is_copy_constructible_v
<int>
199 && is_copy_constructible
<int>::value
, "");
200 static_assert(!is_copy_constructible_v
<NType
>
201 && !is_copy_constructible
<NType
>::value
, "");
203 static_assert(is_move_constructible_v
<int>
204 && is_copy_constructible
<int>::value
, "");
205 static_assert(!is_move_constructible_v
<NType
>
206 && !is_copy_constructible
<NType
>::value
, "");
208 static_assert(is_assignable_v
<int&, int>
209 && is_assignable
<int&, int>::value
, "");
210 static_assert(!is_assignable_v
<int, int>
211 && !is_assignable
<int, int>::value
, "");
213 static_assert(is_copy_assignable_v
<int>
214 && is_copy_assignable
<int>::value
, "");
215 static_assert(!is_copy_assignable_v
<NType
>
216 && !is_copy_assignable
<NType
>::value
, "");
218 static_assert(is_move_assignable_v
<int>
219 && is_move_assignable
<int>::value
, "");
220 static_assert(!is_move_assignable_v
<NType
>
221 && !is_move_assignable
<NType
>::value
, "");
223 static_assert(is_destructible_v
<int>
224 && is_destructible
<int>::value
, "");
225 static_assert(!is_destructible_v
<Abstract
>
226 && !is_destructible
<Abstract
>::value
, "");
228 static_assert(is_trivially_constructible_v
<int, int>
229 && is_trivially_constructible
<int, int>::value
, "");
230 static_assert(!is_trivially_constructible_v
<NType
, NType
>
231 && !is_trivially_constructible
<NType
, NType
>::value
, "");
233 static_assert(is_trivially_default_constructible_v
<int>
234 && is_trivially_default_constructible
<int>::value
, "");
235 static_assert(!is_trivially_default_constructible_v
<NType
>
236 && !is_trivially_default_constructible
<NType
>::value
, "");
238 static_assert(is_trivially_copy_constructible_v
<int>
239 && is_trivially_copy_constructible
<int>::value
, "");
240 static_assert(!is_trivially_copy_constructible_v
<NType
>
241 && !is_trivially_copy_constructible
<NType
>::value
, "");
243 static_assert(is_trivially_move_constructible_v
<int>
244 && is_trivially_move_constructible
<int>::value
, "");
245 static_assert(!is_trivially_move_constructible_v
<NType
>
246 && !is_trivially_move_constructible
<NType
>::value
, "");
248 static_assert(is_trivially_assignable_v
<int&, int>
249 && is_trivially_assignable
<int&, int>::value
, "");
250 static_assert(!is_trivially_assignable_v
<NType
, NType
>
251 && !is_trivially_assignable
<NType
, NType
>::value
, "");
253 static_assert(is_trivially_copy_assignable_v
<int>
254 && is_trivially_copy_assignable
<int>::value
, "");
255 static_assert(!is_trivially_copy_assignable_v
<NType
>
256 && !is_trivially_copy_assignable
<NType
>::value
, "");
258 static_assert(is_trivially_move_assignable_v
<int>
259 && is_trivially_move_assignable
<int>::value
, "");
260 static_assert(!is_trivially_move_assignable_v
<NType
>
261 && !is_trivially_move_assignable
<NType
>::value
, "");
263 static_assert(is_trivially_destructible_v
<int>
264 && is_trivially_destructible
<int>::value
, "");
265 static_assert(!is_trivially_destructible_v
<Abstract
>
266 && !is_trivially_destructible
<Abstract
>::value
, "");
268 static_assert(is_nothrow_constructible_v
<int, int>
269 && is_nothrow_constructible
<int, int>::value
, "");
270 static_assert(!is_nothrow_constructible_v
<NType
, NType
>
271 && !is_nothrow_constructible
<NType
, NType
>::value
, "");
273 static_assert(is_nothrow_default_constructible_v
<int>
274 && is_nothrow_default_constructible
<int>::value
, "");
275 static_assert(!is_nothrow_default_constructible_v
<NType
>
276 && !is_nothrow_default_constructible
<NType
>::value
, "");
278 static_assert(is_nothrow_copy_constructible_v
<int>
279 && is_nothrow_copy_constructible
<int>::value
, "");
280 static_assert(!is_nothrow_copy_constructible_v
<NType
>
281 && !is_nothrow_copy_constructible
<NType
>::value
, "");
283 static_assert(is_nothrow_move_constructible_v
<int>
284 && is_nothrow_move_constructible
<int>::value
, "");
285 static_assert(!is_nothrow_move_constructible_v
<NType
>
286 && !is_nothrow_move_constructible
<NType
>::value
, "");
288 static_assert(is_nothrow_assignable_v
<int&, int>
289 && is_nothrow_assignable
<int&, int>::value
, "");
290 static_assert(!is_nothrow_assignable_v
<NType
, NType
>
291 && !is_nothrow_assignable
<NType
, NType
>::value
, "");
293 static_assert(is_nothrow_copy_assignable_v
<int>
294 && is_nothrow_copy_assignable
<int>::value
, "");
295 static_assert(!is_nothrow_copy_assignable_v
<NType
>
296 && !is_nothrow_copy_assignable
<NType
>::value
, "");
298 static_assert(is_nothrow_move_assignable_v
<int>
299 && is_nothrow_move_assignable
<int>::value
, "");
300 static_assert(!is_nothrow_move_assignable_v
<NType
>
301 && !is_nothrow_move_assignable
<NType
>::value
, "");
303 static_assert(has_virtual_destructor_v
<Abstract
>
304 && has_virtual_destructor
<Abstract
>::value
, "");
305 static_assert(!has_virtual_destructor_v
<NType
>
306 && !has_virtual_destructor
<NType
>::value
, "");
308 static_assert(alignment_of_v
<int> == alignof(int)
309 && alignment_of
<int>::value
== alignof(int) , "");
311 static_assert(rank_v
<int[1][1]> == rank
<int[1][1]>::value
, "");
313 static_assert(extent_v
<int[1][2], 1> == 2
314 && extent
<int[1][2], 1>::value
== 2, "");
316 static_assert(is_same_v
<int, int> && is_same
<int, int>::value
, "");
317 static_assert(!is_same_v
<int, char> && !is_same
<int, char>::value
, "");
319 static_assert(is_base_of_v
<Abstract
, Poly
>
320 && is_base_of
<Abstract
, Poly
>::value
, "");
321 static_assert(!is_base_of_v
<Abstract
, NType
>
322 && !is_base_of
<Abstract
, NType
>::value
, "");
324 static_assert(is_convertible_v
<int&, const int&>
325 && is_convertible
<int&, const int&>::value
, "");
326 static_assert(!is_convertible_v
<const int&, int&>
327 && !is_convertible
<const int&, int&>::value
, "");
329 static_assert(negation_v
<false_type
>, "");
330 static_assert(!negation_v
<true_type
>, "");
331 static_assert(conjunction_v
<>, "");
332 static_assert(!disjunction_v
<>, "");
333 static_assert(conjunction_v
<true_type
>, "");
334 static_assert(!conjunction_v
<false_type
>, "");
335 static_assert(disjunction_v
<true_type
>, "");
336 static_assert(!disjunction_v
<false_type
>, "");
337 static_assert(conjunction_v
<true_type
, true_type
>, "");
338 static_assert(!conjunction_v
<true_type
, false_type
>, "");
339 static_assert(disjunction_v
<false_type
, true_type
>, "");
340 static_assert(!disjunction_v
<false_type
, false_type
>, "");
341 static_assert(conjunction_v
<true_type
, true_type
,
343 static_assert(!conjunction_v
<true_type
, true_type
,
345 static_assert(disjunction_v
<false_type
, false_type
,
347 static_assert(!disjunction_v
<false_type
, false_type
,