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c0ffa2ba | 1 | // C++11 <type_traits> -*- C++ -*- |
af13a7a6 | 2 | |
a5544970 | 3 | // Copyright (C) 2007-2019 Free Software Foundation, Inc. |
af13a7a6 BK |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
af13a7a6 BK |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
af13a7a6 BK |
24 | |
25 | /** @file include/type_traits | |
26 | * This is a Standard C++ Library header. | |
27 | */ | |
28 | ||
4514bed6 BK |
29 | #ifndef _GLIBCXX_TYPE_TRAITS |
30 | #define _GLIBCXX_TYPE_TRAITS 1 | |
af13a7a6 BK |
31 | |
32 | #pragma GCC system_header | |
33 | ||
734f5023 | 34 | #if __cplusplus < 201103L |
ab65a4c7 | 35 | # include <bits/c++0x_warning.h> |
57317d2a | 36 | #else |
af13a7a6 | 37 | |
8fc81078 | 38 | #include <bits/c++config.h> |
e133ace8 | 39 | |
21e2806a JW |
40 | namespace std _GLIBCXX_VISIBILITY(default) |
41 | { | |
42 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
43 | ||
8e32aa11 | 44 | /** |
c0ffa2ba | 45 | * @defgroup metaprogramming Metaprogramming |
13901e4b JW |
46 | * @ingroup utilities |
47 | * | |
48 | * Template utilities for compile-time introspection and modification, | |
49 | * including type classification traits, type property inspection traits | |
50 | * and type transformation traits. | |
51 | * | |
5b9daa7e BK |
52 | * @{ |
53 | */ | |
ac65b7d2 DK |
54 | |
55 | /// integral_constant | |
56 | template<typename _Tp, _Tp __v> | |
57 | struct integral_constant | |
58 | { | |
59 | static constexpr _Tp value = __v; | |
60 | typedef _Tp value_type; | |
61 | typedef integral_constant<_Tp, __v> type; | |
352111c5 | 62 | constexpr operator value_type() const noexcept { return value; } |
db113eda | 63 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
64 | |
65 | #define __cpp_lib_integral_constant_callable 201304 | |
66 | ||
352111c5 | 67 | constexpr value_type operator()() const noexcept { return value; } |
db113eda | 68 | #endif |
ac65b7d2 | 69 | }; |
33ac58d5 | 70 | |
c0ffa2ba BK |
71 | template<typename _Tp, _Tp __v> |
72 | constexpr _Tp integral_constant<_Tp, __v>::value; | |
73 | ||
13901e4b | 74 | /// The type used as a compile-time boolean with true value. |
ac65b7d2 DK |
75 | typedef integral_constant<bool, true> true_type; |
76 | ||
13901e4b | 77 | /// The type used as a compile-time boolean with false value. |
ac65b7d2 DK |
78 | typedef integral_constant<bool, false> false_type; |
79 | ||
f6b640be JW |
80 | template<bool __v> |
81 | using __bool_constant = integral_constant<bool, __v>; | |
82 | ||
46ba1281 | 83 | #if __cplusplus > 201402L |
f9badf71 | 84 | # define __cpp_lib_bool_constant 201505 |
46ba1281 JW |
85 | template<bool __v> |
86 | using bool_constant = integral_constant<bool, __v>; | |
87 | #endif | |
88 | ||
123c516a | 89 | // Meta programming helper types. |
53dc5044 | 90 | |
123c516a PC |
91 | template<bool, typename, typename> |
92 | struct conditional; | |
53dc5044 | 93 | |
608a080c | 94 | template <typename _Type> |
0d67cd38 JW |
95 | struct __type_identity |
96 | { using type = _Type; }; | |
97 | ||
98 | template<typename _Tp> | |
99 | using __type_identity_t = typename __type_identity<_Tp>::type; | |
608a080c | 100 | |
dd7b175e | 101 | template<typename...> |
123c516a PC |
102 | struct __or_; |
103 | ||
ac65b7d2 DK |
104 | template<> |
105 | struct __or_<> | |
106 | : public false_type | |
107 | { }; | |
108 | ||
dd7b175e PC |
109 | template<typename _B1> |
110 | struct __or_<_B1> | |
111 | : public _B1 | |
112 | { }; | |
113 | ||
123c516a PC |
114 | template<typename _B1, typename _B2> |
115 | struct __or_<_B1, _B2> | |
116 | : public conditional<_B1::value, _B1, _B2>::type | |
117 | { }; | |
118 | ||
119 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
120 | struct __or_<_B1, _B2, _B3, _Bn...> | |
121 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
122 | { }; | |
53dc5044 | 123 | |
dd7b175e | 124 | template<typename...> |
123c516a | 125 | struct __and_; |
53dc5044 | 126 | |
ac65b7d2 DK |
127 | template<> |
128 | struct __and_<> | |
129 | : public true_type | |
130 | { }; | |
131 | ||
dd7b175e PC |
132 | template<typename _B1> |
133 | struct __and_<_B1> | |
134 | : public _B1 | |
135 | { }; | |
136 | ||
123c516a PC |
137 | template<typename _B1, typename _B2> |
138 | struct __and_<_B1, _B2> | |
139 | : public conditional<_B1::value, _B2, _B1>::type | |
140 | { }; | |
141 | ||
142 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
143 | struct __and_<_B1, _B2, _B3, _Bn...> | |
144 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
145 | { }; | |
146 | ||
147 | template<typename _Pp> | |
148 | struct __not_ | |
4b9840f2 | 149 | : public __bool_constant<!bool(_Pp::value)> |
123c516a PC |
150 | { }; |
151 | ||
4b9840f2 | 152 | #if __cplusplus >= 201703L |
c3a6648b | 153 | |
b655b8fc JW |
154 | template<typename... _Bn> |
155 | inline constexpr bool __or_v = __or_<_Bn...>::value; | |
156 | template<typename... _Bn> | |
157 | inline constexpr bool __and_v = __and_<_Bn...>::value; | |
158 | ||
068c8ac1 | 159 | #define __cpp_lib_logical_traits 201510 |
c3a6648b VV |
160 | |
161 | template<typename... _Bn> | |
162 | struct conjunction | |
163 | : __and_<_Bn...> | |
164 | { }; | |
165 | ||
166 | template<typename... _Bn> | |
167 | struct disjunction | |
168 | : __or_<_Bn...> | |
169 | { }; | |
170 | ||
171 | template<typename _Pp> | |
172 | struct negation | |
173 | : __not_<_Pp> | |
174 | { }; | |
137422c8 VV |
175 | |
176 | template<typename... _Bn> | |
4b9840f2 | 177 | inline constexpr bool conjunction_v = conjunction<_Bn...>::value; |
42183d03 | 178 | |
137422c8 | 179 | template<typename... _Bn> |
4b9840f2 | 180 | inline constexpr bool disjunction_v = disjunction<_Bn...>::value; |
42183d03 | 181 | |
137422c8 | 182 | template<typename _Pp> |
4b9840f2 | 183 | inline constexpr bool negation_v = negation<_Pp>::value; |
137422c8 | 184 | |
4b9840f2 | 185 | #endif // C++17 |
c3a6648b | 186 | |
608a080c AP |
187 | // Forward declarations |
188 | template<typename> | |
189 | struct is_reference; | |
190 | template<typename> | |
191 | struct is_function; | |
192 | template<typename> | |
193 | struct is_void; | |
194 | template<typename> | |
195 | struct __is_array_unknown_bounds; | |
196 | ||
197 | // Helper functions that return false_type for incomplete classes, | |
198 | // incomplete unions and arrays of known bound from those. | |
199 | ||
200 | template <typename _T, size_t = sizeof(_T)> | |
201 | constexpr true_type __is_complete_or_unbounded(__type_identity<_T>) | |
202 | { return {}; } | |
203 | ||
204 | template <typename _TypeIdentity, | |
205 | typename _NestedType = typename _TypeIdentity::type> | |
206 | constexpr typename __or_< | |
207 | is_reference<_NestedType>, | |
208 | is_function<_NestedType>, | |
209 | is_void<_NestedType>, | |
210 | __is_array_unknown_bounds<_NestedType> | |
211 | >::type __is_complete_or_unbounded(_TypeIdentity) | |
212 | { return {}; } | |
213 | ||
b3618b71 DK |
214 | // For several sfinae-friendly trait implementations we transport both the |
215 | // result information (as the member type) and the failure information (no | |
216 | // member type). This is very similar to std::enable_if, but we cannot use | |
217 | // them, because we need to derive from them as an implementation detail. | |
218 | ||
219 | template<typename _Tp> | |
220 | struct __success_type | |
221 | { typedef _Tp type; }; | |
222 | ||
223 | struct __failure_type | |
224 | { }; | |
225 | ||
53dc5044 PC |
226 | template<typename> |
227 | struct remove_cv; | |
228 | ||
72459cfd JW |
229 | template<typename> |
230 | struct is_const; | |
231 | ||
232 | // Primary type categories. | |
233 | ||
53dc5044 PC |
234 | template<typename> |
235 | struct __is_void_helper | |
236 | : public false_type { }; | |
53dc5044 | 237 | |
123c516a PC |
238 | template<> |
239 | struct __is_void_helper<void> | |
240 | : public true_type { }; | |
53dc5044 PC |
241 | |
242 | /// is_void | |
243 | template<typename _Tp> | |
244 | struct is_void | |
82b12c4b | 245 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
246 | { }; |
247 | ||
248 | template<typename> | |
249 | struct __is_integral_helper | |
250 | : public false_type { }; | |
123c516a PC |
251 | |
252 | template<> | |
253 | struct __is_integral_helper<bool> | |
254 | : public true_type { }; | |
33ac58d5 | 255 | |
123c516a PC |
256 | template<> |
257 | struct __is_integral_helper<char> | |
258 | : public true_type { }; | |
259 | ||
260 | template<> | |
261 | struct __is_integral_helper<signed char> | |
262 | : public true_type { }; | |
263 | ||
264 | template<> | |
265 | struct __is_integral_helper<unsigned char> | |
266 | : public true_type { }; | |
267 | ||
53dc5044 | 268 | #ifdef _GLIBCXX_USE_WCHAR_T |
123c516a PC |
269 | template<> |
270 | struct __is_integral_helper<wchar_t> | |
271 | : public true_type { }; | |
53dc5044 | 272 | #endif |
123c516a | 273 | |
c124af93 TH |
274 | #ifdef _GLIBCXX_USE_CHAR8_T |
275 | template<> | |
276 | struct __is_integral_helper<char8_t> | |
277 | : public true_type { }; | |
278 | #endif | |
279 | ||
123c516a PC |
280 | template<> |
281 | struct __is_integral_helper<char16_t> | |
282 | : public true_type { }; | |
283 | ||
284 | template<> | |
285 | struct __is_integral_helper<char32_t> | |
286 | : public true_type { }; | |
287 | ||
288 | template<> | |
289 | struct __is_integral_helper<short> | |
290 | : public true_type { }; | |
291 | ||
292 | template<> | |
293 | struct __is_integral_helper<unsigned short> | |
294 | : public true_type { }; | |
295 | ||
296 | template<> | |
297 | struct __is_integral_helper<int> | |
298 | : public true_type { }; | |
299 | ||
300 | template<> | |
301 | struct __is_integral_helper<unsigned int> | |
302 | : public true_type { }; | |
303 | ||
304 | template<> | |
305 | struct __is_integral_helper<long> | |
306 | : public true_type { }; | |
307 | ||
308 | template<> | |
309 | struct __is_integral_helper<unsigned long> | |
310 | : public true_type { }; | |
311 | ||
312 | template<> | |
313 | struct __is_integral_helper<long long> | |
314 | : public true_type { }; | |
315 | ||
316 | template<> | |
317 | struct __is_integral_helper<unsigned long long> | |
318 | : public true_type { }; | |
53dc5044 | 319 | |
78a7c317 DD |
320 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
321 | // uses one of these types for size_t. | |
322 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
6d585f01 | 323 | template<> |
78a7c317 | 324 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
6d585f01 PC |
325 | : public true_type { }; |
326 | ||
327 | template<> | |
78a7c317 DD |
328 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
329 | : public true_type { }; | |
330 | #endif | |
331 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
332 | template<> | |
333 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
334 | : public true_type { }; | |
335 | ||
336 | template<> | |
337 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
338 | : public true_type { }; | |
339 | #endif | |
340 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
341 | template<> | |
342 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
343 | : public true_type { }; | |
344 | ||
345 | template<> | |
346 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
347 | : public true_type { }; | |
348 | #endif | |
349 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
350 | template<> | |
351 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
352 | : public true_type { }; | |
353 | ||
354 | template<> | |
355 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
6d585f01 PC |
356 | : public true_type { }; |
357 | #endif | |
358 | ||
53dc5044 PC |
359 | /// is_integral |
360 | template<typename _Tp> | |
361 | struct is_integral | |
82b12c4b | 362 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
363 | { }; |
364 | ||
365 | template<typename> | |
366 | struct __is_floating_point_helper | |
367 | : public false_type { }; | |
123c516a PC |
368 | |
369 | template<> | |
370 | struct __is_floating_point_helper<float> | |
371 | : public true_type { }; | |
372 | ||
373 | template<> | |
374 | struct __is_floating_point_helper<double> | |
375 | : public true_type { }; | |
376 | ||
377 | template<> | |
378 | struct __is_floating_point_helper<long double> | |
379 | : public true_type { }; | |
53dc5044 | 380 | |
6d585f01 PC |
381 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
382 | template<> | |
383 | struct __is_floating_point_helper<__float128> | |
384 | : public true_type { }; | |
385 | #endif | |
386 | ||
53dc5044 PC |
387 | /// is_floating_point |
388 | template<typename _Tp> | |
389 | struct is_floating_point | |
82b12c4b | 390 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
391 | { }; |
392 | ||
393 | /// is_array | |
394 | template<typename> | |
395 | struct is_array | |
396 | : public false_type { }; | |
397 | ||
398 | template<typename _Tp, std::size_t _Size> | |
399 | struct is_array<_Tp[_Size]> | |
400 | : public true_type { }; | |
401 | ||
402 | template<typename _Tp> | |
403 | struct is_array<_Tp[]> | |
404 | : public true_type { }; | |
405 | ||
406 | template<typename> | |
407 | struct __is_pointer_helper | |
408 | : public false_type { }; | |
123c516a PC |
409 | |
410 | template<typename _Tp> | |
411 | struct __is_pointer_helper<_Tp*> | |
412 | : public true_type { }; | |
53dc5044 PC |
413 | |
414 | /// is_pointer | |
415 | template<typename _Tp> | |
416 | struct is_pointer | |
82b12c4b | 417 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
418 | { }; |
419 | ||
123c516a PC |
420 | /// is_lvalue_reference |
421 | template<typename> | |
422 | struct is_lvalue_reference | |
423 | : public false_type { }; | |
424 | ||
53dc5044 | 425 | template<typename _Tp> |
123c516a PC |
426 | struct is_lvalue_reference<_Tp&> |
427 | : public true_type { }; | |
428 | ||
429 | /// is_rvalue_reference | |
430 | template<typename> | |
431 | struct is_rvalue_reference | |
432 | : public false_type { }; | |
53dc5044 | 433 | |
53dc5044 | 434 | template<typename _Tp> |
123c516a PC |
435 | struct is_rvalue_reference<_Tp&&> |
436 | : public true_type { }; | |
437 | ||
53dc5044 PC |
438 | template<typename> |
439 | struct __is_member_object_pointer_helper | |
440 | : public false_type { }; | |
123c516a PC |
441 | |
442 | template<typename _Tp, typename _Cp> | |
443 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
c01f9216 | 444 | : public __not_<is_function<_Tp>>::type { }; |
53dc5044 PC |
445 | |
446 | /// is_member_object_pointer | |
447 | template<typename _Tp> | |
448 | struct is_member_object_pointer | |
82b12c4b FD |
449 | : public __is_member_object_pointer_helper< |
450 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
451 | { }; |
452 | ||
453 | template<typename> | |
454 | struct __is_member_function_pointer_helper | |
455 | : public false_type { }; | |
123c516a PC |
456 | |
457 | template<typename _Tp, typename _Cp> | |
458 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
c01f9216 | 459 | : public is_function<_Tp>::type { }; |
53dc5044 PC |
460 | |
461 | /// is_member_function_pointer | |
462 | template<typename _Tp> | |
463 | struct is_member_function_pointer | |
82b12c4b FD |
464 | : public __is_member_function_pointer_helper< |
465 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
466 | { }; |
467 | ||
468 | /// is_enum | |
469 | template<typename _Tp> | |
470 | struct is_enum | |
471 | : public integral_constant<bool, __is_enum(_Tp)> | |
472 | { }; | |
473 | ||
474 | /// is_union | |
475 | template<typename _Tp> | |
476 | struct is_union | |
477 | : public integral_constant<bool, __is_union(_Tp)> | |
478 | { }; | |
479 | ||
480 | /// is_class | |
481 | template<typename _Tp> | |
482 | struct is_class | |
483 | : public integral_constant<bool, __is_class(_Tp)> | |
484 | { }; | |
485 | ||
486 | /// is_function | |
72459cfd | 487 | template<typename _Tp> |
53dc5044 | 488 | struct is_function |
72459cfd | 489 | : public __bool_constant<!is_const<const _Tp>::value> { }; |
89898034 | 490 | |
72459cfd JW |
491 | template<typename _Tp> |
492 | struct is_function<_Tp&> | |
493 | : public false_type { }; | |
89898034 | 494 | |
72459cfd JW |
495 | template<typename _Tp> |
496 | struct is_function<_Tp&&> | |
497 | : public false_type { }; | |
89898034 | 498 | |
a15f7cb8 ESR |
499 | #define __cpp_lib_is_null_pointer 201309 |
500 | ||
1e673415 | 501 | template<typename> |
aa940ab5 | 502 | struct __is_null_pointer_helper |
1e673415 | 503 | : public false_type { }; |
123c516a PC |
504 | |
505 | template<> | |
aa940ab5 | 506 | struct __is_null_pointer_helper<std::nullptr_t> |
123c516a | 507 | : public true_type { }; |
1e673415 | 508 | |
aa940ab5 PC |
509 | /// is_null_pointer (LWG 2247). |
510 | template<typename _Tp> | |
511 | struct is_null_pointer | |
512 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
513 | { }; | |
514 | ||
07fd852f | 515 | /// __is_nullptr_t (deprecated extension). |
1e673415 PC |
516 | template<typename _Tp> |
517 | struct __is_nullptr_t | |
aa940ab5 | 518 | : public is_null_pointer<_Tp> |
07fd852f | 519 | { } _GLIBCXX_DEPRECATED; |
1e673415 | 520 | |
c0ffa2ba | 521 | // Composite type categories. |
123c516a PC |
522 | |
523 | /// is_reference | |
524 | template<typename _Tp> | |
525 | struct is_reference | |
526 | : public __or_<is_lvalue_reference<_Tp>, | |
527 | is_rvalue_reference<_Tp>>::type | |
528 | { }; | |
529 | ||
53dc5044 PC |
530 | /// is_arithmetic |
531 | template<typename _Tp> | |
532 | struct is_arithmetic | |
123c516a | 533 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
53dc5044 PC |
534 | { }; |
535 | ||
536 | /// is_fundamental | |
537 | template<typename _Tp> | |
538 | struct is_fundamental | |
aa940ab5 PC |
539 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
540 | is_null_pointer<_Tp>>::type | |
53dc5044 PC |
541 | { }; |
542 | ||
543 | /// is_object | |
544 | template<typename _Tp> | |
545 | struct is_object | |
123c516a PC |
546 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
547 | is_void<_Tp>>>::type | |
53dc5044 PC |
548 | { }; |
549 | ||
123c516a | 550 | template<typename> |
53dc5044 PC |
551 | struct is_member_pointer; |
552 | ||
553 | /// is_scalar | |
554 | template<typename _Tp> | |
555 | struct is_scalar | |
123c516a | 556 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
aa940ab5 | 557 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
53dc5044 PC |
558 | { }; |
559 | ||
560 | /// is_compound | |
561 | template<typename _Tp> | |
562 | struct is_compound | |
c01f9216 | 563 | : public __not_<is_fundamental<_Tp>>::type { }; |
53dc5044 | 564 | |
53dc5044 PC |
565 | template<typename _Tp> |
566 | struct __is_member_pointer_helper | |
567 | : public false_type { }; | |
123c516a PC |
568 | |
569 | template<typename _Tp, typename _Cp> | |
570 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
571 | : public true_type { }; | |
53dc5044 | 572 | |
13901e4b | 573 | /// is_member_pointer |
53dc5044 | 574 | template<typename _Tp> |
123c516a | 575 | struct is_member_pointer |
82b12c4b | 576 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
577 | { }; |
578 | ||
47f79054 JW |
579 | template<typename, typename> |
580 | struct is_same; | |
581 | ||
582 | template<typename _Tp, typename... _Types> | |
583 | using __is_one_of = __or_<is_same<_Tp, _Types>...>; | |
584 | ||
585 | // Check if a type is one of the signed integer types. | |
586 | template<typename _Tp> | |
587 | using __is_signed_integer = __is_one_of<typename remove_cv<_Tp>::type, | |
588 | signed char, signed short, signed int, signed long, | |
589 | signed long long | |
590 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
591 | , signed __GLIBCXX_TYPE_INT_N_0 | |
592 | #endif | |
593 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
594 | , signed __GLIBCXX_TYPE_INT_N_1 | |
595 | #endif | |
596 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
597 | , signed __GLIBCXX_TYPE_INT_N_2 | |
598 | #endif | |
599 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
600 | , signed __GLIBCXX_TYPE_INT_N_3 | |
601 | #endif | |
602 | >; | |
603 | ||
604 | // Check if a type is one of the unsigned integer types. | |
605 | template<typename _Tp> | |
606 | using __is_unsigned_integer = __is_one_of<typename remove_cv<_Tp>::type, | |
607 | unsigned char, unsigned short, unsigned int, unsigned long, | |
608 | unsigned long long | |
609 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
610 | , unsigned __GLIBCXX_TYPE_INT_N_0 | |
611 | #endif | |
612 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
613 | , unsigned __GLIBCXX_TYPE_INT_N_1 | |
614 | #endif | |
615 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
616 | , unsigned __GLIBCXX_TYPE_INT_N_2 | |
617 | #endif | |
618 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
619 | , unsigned __GLIBCXX_TYPE_INT_N_3 | |
620 | #endif | |
621 | >; | |
622 | ||
623 | ||
72459cfd JW |
624 | // __void_t (std::void_t for C++11) |
625 | template<typename...> using __void_t = void; | |
626 | ||
89898034 DK |
627 | // Utility to detect referenceable types ([defns.referenceable]). |
628 | ||
72459cfd | 629 | template<typename _Tp, typename = void> |
89898034 | 630 | struct __is_referenceable |
72459cfd | 631 | : public false_type |
89898034 DK |
632 | { }; |
633 | ||
72459cfd JW |
634 | template<typename _Tp> |
635 | struct __is_referenceable<_Tp, __void_t<_Tp&>> | |
89898034 DK |
636 | : public true_type |
637 | { }; | |
638 | ||
c0ffa2ba | 639 | // Type properties. |
123c516a | 640 | |
53dc5044 PC |
641 | /// is_const |
642 | template<typename> | |
643 | struct is_const | |
644 | : public false_type { }; | |
645 | ||
646 | template<typename _Tp> | |
647 | struct is_const<_Tp const> | |
648 | : public true_type { }; | |
33ac58d5 | 649 | |
53dc5044 PC |
650 | /// is_volatile |
651 | template<typename> | |
652 | struct is_volatile | |
653 | : public false_type { }; | |
654 | ||
655 | template<typename _Tp> | |
656 | struct is_volatile<_Tp volatile> | |
657 | : public true_type { }; | |
658 | ||
123c516a PC |
659 | /// is_trivial |
660 | template<typename _Tp> | |
661 | struct is_trivial | |
662 | : public integral_constant<bool, __is_trivial(_Tp)> | |
608a080c AP |
663 | { |
664 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
665 | "template argument must be a complete class or an unbounded array"); | |
666 | }; | |
123c516a | 667 | |
f5e523b7 VV |
668 | // is_trivially_copyable |
669 | template<typename _Tp> | |
670 | struct is_trivially_copyable | |
671 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
608a080c AP |
672 | { |
673 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
674 | "template argument must be a complete class or an unbounded array"); | |
675 | }; | |
123c516a PC |
676 | |
677 | /// is_standard_layout | |
678 | template<typename _Tp> | |
679 | struct is_standard_layout | |
680 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
608a080c AP |
681 | { |
682 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
683 | "template argument must be a complete class or an unbounded array"); | |
684 | }; | |
123c516a PC |
685 | |
686 | /// is_pod | |
687 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
688 | template<typename _Tp> | |
689 | struct is_pod | |
690 | : public integral_constant<bool, __is_pod(_Tp)> | |
608a080c AP |
691 | { |
692 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
693 | "template argument must be a complete class or an unbounded array"); | |
694 | }; | |
123c516a PC |
695 | |
696 | /// is_literal_type | |
697 | template<typename _Tp> | |
698 | struct is_literal_type | |
699 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
608a080c AP |
700 | { |
701 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
702 | "template argument must be a complete class or an unbounded array"); | |
703 | }; | |
123c516a | 704 | |
53dc5044 PC |
705 | /// is_empty |
706 | template<typename _Tp> | |
707 | struct is_empty | |
708 | : public integral_constant<bool, __is_empty(_Tp)> | |
209ee624 | 709 | { }; |
53dc5044 PC |
710 | |
711 | /// is_polymorphic | |
712 | template<typename _Tp> | |
713 | struct is_polymorphic | |
714 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
209ee624 | 715 | { }; |
53dc5044 | 716 | |
4db7fcb9 ESR |
717 | #if __cplusplus >= 201402L |
718 | #define __cpp_lib_is_final 201402L | |
719 | /// is_final | |
720 | template<typename _Tp> | |
721 | struct is_final | |
722 | : public integral_constant<bool, __is_final(_Tp)> | |
209ee624 | 723 | { }; |
4db7fcb9 ESR |
724 | #endif |
725 | ||
53dc5044 PC |
726 | /// is_abstract |
727 | template<typename _Tp> | |
728 | struct is_abstract | |
729 | : public integral_constant<bool, __is_abstract(_Tp)> | |
209ee624 | 730 | { }; |
53dc5044 | 731 | |
123c516a | 732 | template<typename _Tp, |
6a4b1a00 | 733 | bool = is_arithmetic<_Tp>::value> |
123c516a PC |
734 | struct __is_signed_helper |
735 | : public false_type { }; | |
736 | ||
53dc5044 | 737 | template<typename _Tp> |
6a4b1a00 PC |
738 | struct __is_signed_helper<_Tp, true> |
739 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
53dc5044 PC |
740 | { }; |
741 | ||
123c516a | 742 | /// is_signed |
53dc5044 | 743 | template<typename _Tp> |
123c516a | 744 | struct is_signed |
82b12c4b | 745 | : public __is_signed_helper<_Tp>::type |
123c516a PC |
746 | { }; |
747 | ||
748 | /// is_unsigned | |
749 | template<typename _Tp> | |
750 | struct is_unsigned | |
f7632193 | 751 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> |
123c516a PC |
752 | { }; |
753 | ||
754 | ||
c0ffa2ba | 755 | // Destructible and constructible type properties. |
123c516a | 756 | |
13901e4b JW |
757 | /** |
758 | * @brief Utility to simplify expressions used in unevaluated operands | |
759 | * @ingroup utilities | |
760 | */ | |
ec26ff5a JW |
761 | |
762 | template<typename _Tp, typename _Up = _Tp&&> | |
763 | _Up | |
764 | __declval(int); | |
765 | ||
766 | template<typename _Tp> | |
767 | _Tp | |
768 | __declval(long); | |
769 | ||
53dc5044 | 770 | template<typename _Tp> |
ec26ff5a | 771 | auto declval() noexcept -> decltype(__declval<_Tp>(0)); |
53dc5044 | 772 | |
123c516a PC |
773 | template<typename, unsigned = 0> |
774 | struct extent; | |
775 | ||
776 | template<typename> | |
777 | struct remove_all_extents; | |
778 | ||
779 | template<typename _Tp> | |
780 | struct __is_array_known_bounds | |
781 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
53dc5044 PC |
782 | { }; |
783 | ||
123c516a PC |
784 | template<typename _Tp> |
785 | struct __is_array_unknown_bounds | |
f7632193 | 786 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> |
53dc5044 | 787 | { }; |
33ac58d5 | 788 | |
62fa805f | 789 | // In N3290 is_destructible does not say anything about function |
2c7a09d7 | 790 | // types and abstract types, see LWG 2049. This implementation |
62fa805f DK |
791 | // describes function types as non-destructible and all complete |
792 | // object types as destructible, iff the explicit destructor | |
2c7a09d7 | 793 | // call expression is wellformed. |
62fa805f | 794 | struct __do_is_destructible_impl |
123c516a | 795 | { |
62fa805f | 796 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
123c516a PC |
797 | static true_type __test(int); |
798 | ||
799 | template<typename> | |
800 | static false_type __test(...); | |
801 | }; | |
53dc5044 PC |
802 | |
803 | template<typename _Tp> | |
62fa805f DK |
804 | struct __is_destructible_impl |
805 | : public __do_is_destructible_impl | |
123c516a PC |
806 | { |
807 | typedef decltype(__test<_Tp>(0)) type; | |
808 | }; | |
53dc5044 | 809 | |
62fa805f DK |
810 | template<typename _Tp, |
811 | bool = __or_<is_void<_Tp>, | |
812 | __is_array_unknown_bounds<_Tp>, | |
813 | is_function<_Tp>>::value, | |
814 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
815 | struct __is_destructible_safe; | |
816 | ||
817 | template<typename _Tp> | |
818 | struct __is_destructible_safe<_Tp, false, false> | |
819 | : public __is_destructible_impl<typename | |
820 | remove_all_extents<_Tp>::type>::type | |
821 | { }; | |
822 | ||
823 | template<typename _Tp> | |
824 | struct __is_destructible_safe<_Tp, true, false> | |
825 | : public false_type { }; | |
826 | ||
827 | template<typename _Tp> | |
828 | struct __is_destructible_safe<_Tp, false, true> | |
829 | : public true_type { }; | |
830 | ||
831 | /// is_destructible | |
832 | template<typename _Tp> | |
833 | struct is_destructible | |
82b12c4b | 834 | : public __is_destructible_safe<_Tp>::type |
608a080c AP |
835 | { |
836 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
837 | "template argument must be a complete class or an unbounded array"); | |
838 | }; | |
62fa805f DK |
839 | |
840 | // is_nothrow_destructible requires that is_destructible is | |
841 | // satisfied as well. We realize that by mimicing the | |
842 | // implementation of is_destructible but refer to noexcept(expr) | |
843 | // instead of decltype(expr). | |
844 | struct __do_is_nt_destructible_impl | |
123c516a | 845 | { |
62fa805f | 846 | template<typename _Tp> |
c01f9216 JW |
847 | static __bool_constant<noexcept(declval<_Tp&>().~_Tp())> |
848 | __test(int); | |
123c516a PC |
849 | |
850 | template<typename> | |
851 | static false_type __test(...); | |
852 | }; | |
53dc5044 | 853 | |
53dc5044 | 854 | template<typename _Tp> |
62fa805f DK |
855 | struct __is_nt_destructible_impl |
856 | : public __do_is_nt_destructible_impl | |
123c516a PC |
857 | { |
858 | typedef decltype(__test<_Tp>(0)) type; | |
859 | }; | |
860 | ||
861 | template<typename _Tp, | |
862 | bool = __or_<is_void<_Tp>, | |
62fa805f DK |
863 | __is_array_unknown_bounds<_Tp>, |
864 | is_function<_Tp>>::value, | |
865 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
866 | struct __is_nt_destructible_safe; | |
53dc5044 PC |
867 | |
868 | template<typename _Tp> | |
62fa805f DK |
869 | struct __is_nt_destructible_safe<_Tp, false, false> |
870 | : public __is_nt_destructible_impl<typename | |
871 | remove_all_extents<_Tp>::type>::type | |
123c516a PC |
872 | { }; |
873 | ||
53dc5044 | 874 | template<typename _Tp> |
62fa805f | 875 | struct __is_nt_destructible_safe<_Tp, true, false> |
123c516a | 876 | : public false_type { }; |
53dc5044 PC |
877 | |
878 | template<typename _Tp> | |
62fa805f | 879 | struct __is_nt_destructible_safe<_Tp, false, true> |
123c516a PC |
880 | : public true_type { }; |
881 | ||
62fa805f | 882 | /// is_nothrow_destructible |
53dc5044 | 883 | template<typename _Tp> |
62fa805f | 884 | struct is_nothrow_destructible |
82b12c4b | 885 | : public __is_nt_destructible_safe<_Tp>::type |
608a080c AP |
886 | { |
887 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
888 | "template argument must be a complete class or an unbounded array"); | |
889 | }; | |
890 | ||
891 | template<typename _Tp, typename... _Args> | |
892 | struct __is_constructible_impl | |
893 | : public __bool_constant<__is_constructible(_Tp, _Args...)> | |
123c516a PC |
894 | { }; |
895 | ||
58487c21 JW |
896 | /// is_constructible |
897 | template<typename _Tp, typename... _Args> | |
898 | struct is_constructible | |
608a080c AP |
899 | : public __is_constructible_impl<_Tp, _Args...> |
900 | { | |
901 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
902 | "template argument must be a complete class or an unbounded array"); | |
903 | }; | |
4a27a739 | 904 | |
123c516a | 905 | /// is_default_constructible |
4a27a739 | 906 | template<typename _Tp> |
123c516a | 907 | struct is_default_constructible |
608a080c AP |
908 | : public __is_constructible_impl<_Tp>::type |
909 | { | |
910 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
911 | "template argument must be a complete class or an unbounded array"); | |
912 | }; | |
c32097d8 | 913 | |
89898034 | 914 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd | 915 | struct __is_copy_constructible_impl; |
123c516a | 916 | |
65cee9bd | 917 | template<typename _Tp> |
89898034 | 918 | struct __is_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
919 | : public false_type { }; |
920 | ||
921 | template<typename _Tp> | |
89898034 | 922 | struct __is_copy_constructible_impl<_Tp, true> |
608a080c | 923 | : public __is_constructible_impl<_Tp, const _Tp&> |
65cee9bd PC |
924 | { }; |
925 | ||
926 | /// is_copy_constructible | |
927 | template<typename _Tp> | |
928 | struct is_copy_constructible | |
929 | : public __is_copy_constructible_impl<_Tp> | |
608a080c AP |
930 | { |
931 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
932 | "template argument must be a complete class or an unbounded array"); | |
933 | }; | |
65cee9bd | 934 | |
89898034 | 935 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
936 | struct __is_move_constructible_impl; |
937 | ||
938 | template<typename _Tp> | |
89898034 | 939 | struct __is_move_constructible_impl<_Tp, false> |
65cee9bd PC |
940 | : public false_type { }; |
941 | ||
942 | template<typename _Tp> | |
89898034 | 943 | struct __is_move_constructible_impl<_Tp, true> |
608a080c | 944 | : public __is_constructible_impl<_Tp, _Tp&&> |
65cee9bd PC |
945 | { }; |
946 | ||
947 | /// is_move_constructible | |
948 | template<typename _Tp> | |
949 | struct is_move_constructible | |
950 | : public __is_move_constructible_impl<_Tp> | |
608a080c AP |
951 | { |
952 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
953 | "template argument must be a complete class or an unbounded array"); | |
954 | }; | |
65cee9bd PC |
955 | |
956 | template<typename _Tp> | |
957 | struct __is_nt_default_constructible_atom | |
958 | : public integral_constant<bool, noexcept(_Tp())> | |
959 | { }; | |
960 | ||
961 | template<typename _Tp, bool = is_array<_Tp>::value> | |
962 | struct __is_nt_default_constructible_impl; | |
963 | ||
964 | template<typename _Tp> | |
965 | struct __is_nt_default_constructible_impl<_Tp, true> | |
966 | : public __and_<__is_array_known_bounds<_Tp>, | |
967 | __is_nt_default_constructible_atom<typename | |
f7632193 | 968 | remove_all_extents<_Tp>::type>> |
65cee9bd PC |
969 | { }; |
970 | ||
971 | template<typename _Tp> | |
972 | struct __is_nt_default_constructible_impl<_Tp, false> | |
973 | : public __is_nt_default_constructible_atom<_Tp> | |
974 | { }; | |
975 | ||
608a080c AP |
976 | template<typename _Tp> |
977 | using __is_nothrow_default_constructible_impl | |
978 | = __and_<__is_constructible_impl<_Tp>, | |
979 | __is_nt_default_constructible_impl<_Tp>>; | |
980 | ||
65cee9bd PC |
981 | /// is_nothrow_default_constructible |
982 | template<typename _Tp> | |
983 | struct is_nothrow_default_constructible | |
608a080c AP |
984 | : public __is_nothrow_default_constructible_impl<_Tp>::type |
985 | { | |
986 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
987 | "template argument must be a complete class or an unbounded array"); | |
988 | }; | |
e4f32cb0 PC |
989 | |
990 | template<typename _Tp, typename... _Args> | |
65cee9bd PC |
991 | struct __is_nt_constructible_impl |
992 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
993 | { }; | |
e4f32cb0 PC |
994 | |
995 | template<typename _Tp, typename _Arg> | |
65cee9bd PC |
996 | struct __is_nt_constructible_impl<_Tp, _Arg> |
997 | : public integral_constant<bool, | |
998 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
999 | { }; | |
1000 | ||
1001 | template<typename _Tp> | |
1002 | struct __is_nt_constructible_impl<_Tp> | |
608a080c | 1003 | : public __is_nothrow_default_constructible_impl<_Tp> |
65cee9bd | 1004 | { }; |
e4f32cb0 | 1005 | |
e4f32cb0 | 1006 | template<typename _Tp, typename... _Args> |
608a080c AP |
1007 | struct __is_nothrow_constructible_impl |
1008 | : public __and_<__is_constructible_impl<_Tp, _Args...>, | |
f7632193 | 1009 | __is_nt_constructible_impl<_Tp, _Args...>> |
65cee9bd PC |
1010 | { }; |
1011 | ||
608a080c AP |
1012 | /// is_nothrow_constructible |
1013 | template<typename _Tp, typename... _Args> | |
1014 | struct is_nothrow_constructible | |
1015 | : public __is_nothrow_constructible_impl<_Tp, _Args...>::type | |
1016 | { | |
1017 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1018 | "template argument must be a complete class or an unbounded array"); | |
1019 | }; | |
1020 | ||
89898034 | 1021 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1022 | struct __is_nothrow_copy_constructible_impl; |
1023 | ||
1024 | template<typename _Tp> | |
89898034 | 1025 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1026 | : public false_type { }; |
1027 | ||
1028 | template<typename _Tp> | |
89898034 | 1029 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
608a080c | 1030 | : public __is_nothrow_constructible_impl<_Tp, const _Tp&> |
65cee9bd PC |
1031 | { }; |
1032 | ||
1033 | /// is_nothrow_copy_constructible | |
1034 | template<typename _Tp> | |
1035 | struct is_nothrow_copy_constructible | |
608a080c AP |
1036 | : public __is_nothrow_copy_constructible_impl<_Tp>::type |
1037 | { | |
1038 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1039 | "template argument must be a complete class or an unbounded array"); | |
1040 | }; | |
65cee9bd | 1041 | |
89898034 | 1042 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1043 | struct __is_nothrow_move_constructible_impl; |
1044 | ||
1045 | template<typename _Tp> | |
89898034 | 1046 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1047 | : public false_type { }; |
1048 | ||
1049 | template<typename _Tp> | |
89898034 | 1050 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
608a080c | 1051 | : public __is_nothrow_constructible_impl<_Tp, _Tp&&> |
65cee9bd PC |
1052 | { }; |
1053 | ||
1054 | /// is_nothrow_move_constructible | |
1055 | template<typename _Tp> | |
1056 | struct is_nothrow_move_constructible | |
608a080c AP |
1057 | : public __is_nothrow_move_constructible_impl<_Tp>::type |
1058 | { | |
1059 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1060 | "template argument must be a complete class or an unbounded array"); | |
1061 | }; | |
65cee9bd | 1062 | |
f263981a PC |
1063 | /// is_assignable |
1064 | template<typename _Tp, typename _Up> | |
1065 | struct is_assignable | |
608a080c AP |
1066 | : public __bool_constant<__is_assignable(_Tp, _Up)> |
1067 | { | |
1068 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1069 | "template argument must be a complete class or an unbounded array"); | |
1070 | }; | |
f263981a | 1071 | |
89898034 | 1072 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1073 | struct __is_copy_assignable_impl; |
1074 | ||
1075 | template<typename _Tp> | |
89898034 | 1076 | struct __is_copy_assignable_impl<_Tp, false> |
f263981a PC |
1077 | : public false_type { }; |
1078 | ||
1079 | template<typename _Tp> | |
89898034 | 1080 | struct __is_copy_assignable_impl<_Tp, true> |
608a080c | 1081 | : public __bool_constant<__is_assignable(_Tp&, const _Tp&)> |
f263981a PC |
1082 | { }; |
1083 | ||
1084 | /// is_copy_assignable | |
1085 | template<typename _Tp> | |
1086 | struct is_copy_assignable | |
608a080c AP |
1087 | : public __is_copy_assignable_impl<_Tp>::type |
1088 | { | |
1089 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1090 | "template argument must be a complete class or an unbounded array"); | |
1091 | }; | |
f263981a | 1092 | |
89898034 | 1093 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1094 | struct __is_move_assignable_impl; |
1095 | ||
1096 | template<typename _Tp> | |
89898034 | 1097 | struct __is_move_assignable_impl<_Tp, false> |
f263981a PC |
1098 | : public false_type { }; |
1099 | ||
1100 | template<typename _Tp> | |
89898034 | 1101 | struct __is_move_assignable_impl<_Tp, true> |
608a080c | 1102 | : public __bool_constant<__is_assignable(_Tp&, _Tp&&)> |
f263981a PC |
1103 | { }; |
1104 | ||
1105 | /// is_move_assignable | |
1106 | template<typename _Tp> | |
1107 | struct is_move_assignable | |
608a080c AP |
1108 | : public __is_move_assignable_impl<_Tp>::type |
1109 | { | |
1110 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1111 | "template argument must be a complete class or an unbounded array"); | |
1112 | }; | |
f263981a PC |
1113 | |
1114 | template<typename _Tp, typename _Up> | |
1115 | struct __is_nt_assignable_impl | |
1116 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1117 | { }; | |
1118 | ||
f263981a | 1119 | template<typename _Tp, typename _Up> |
608a080c AP |
1120 | struct __is_nothrow_assignable_impl |
1121 | : public __and_<__bool_constant<__is_assignable(_Tp, _Up)>, | |
f7632193 | 1122 | __is_nt_assignable_impl<_Tp, _Up>> |
f263981a PC |
1123 | { }; |
1124 | ||
608a080c AP |
1125 | /// is_nothrow_assignable |
1126 | template<typename _Tp, typename _Up> | |
1127 | struct is_nothrow_assignable | |
1128 | : public __is_nothrow_assignable_impl<_Tp, _Up> | |
1129 | { | |
1130 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1131 | "template argument must be a complete class or an unbounded array"); | |
1132 | }; | |
1133 | ||
89898034 | 1134 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1135 | struct __is_nt_copy_assignable_impl; |
1136 | ||
1137 | template<typename _Tp> | |
89898034 | 1138 | struct __is_nt_copy_assignable_impl<_Tp, false> |
f263981a PC |
1139 | : public false_type { }; |
1140 | ||
1141 | template<typename _Tp> | |
89898034 | 1142 | struct __is_nt_copy_assignable_impl<_Tp, true> |
608a080c | 1143 | : public __is_nothrow_assignable_impl<_Tp&, const _Tp&> |
f263981a PC |
1144 | { }; |
1145 | ||
1146 | /// is_nothrow_copy_assignable | |
1147 | template<typename _Tp> | |
1148 | struct is_nothrow_copy_assignable | |
1149 | : public __is_nt_copy_assignable_impl<_Tp> | |
608a080c AP |
1150 | { |
1151 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1152 | "template argument must be a complete class or an unbounded array"); | |
1153 | }; | |
f263981a | 1154 | |
89898034 | 1155 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1156 | struct __is_nt_move_assignable_impl; |
1157 | ||
1158 | template<typename _Tp> | |
89898034 | 1159 | struct __is_nt_move_assignable_impl<_Tp, false> |
f263981a PC |
1160 | : public false_type { }; |
1161 | ||
1162 | template<typename _Tp> | |
89898034 | 1163 | struct __is_nt_move_assignable_impl<_Tp, true> |
608a080c | 1164 | : public __is_nothrow_assignable_impl<_Tp&, _Tp&&> |
f263981a PC |
1165 | { }; |
1166 | ||
1167 | /// is_nothrow_move_assignable | |
65cee9bd | 1168 | template<typename _Tp> |
f263981a PC |
1169 | struct is_nothrow_move_assignable |
1170 | : public __is_nt_move_assignable_impl<_Tp> | |
608a080c AP |
1171 | { |
1172 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1173 | "template argument must be a complete class or an unbounded array"); | |
1174 | }; | |
e4f32cb0 | 1175 | |
f5e523b7 VV |
1176 | /// is_trivially_constructible |
1177 | template<typename _Tp, typename... _Args> | |
1178 | struct is_trivially_constructible | |
c01f9216 | 1179 | : public __bool_constant<__is_trivially_constructible(_Tp, _Args...)> |
608a080c AP |
1180 | { |
1181 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1182 | "template argument must be a complete class or an unbounded array"); | |
1183 | }; | |
33ac58d5 | 1184 | |
f5e523b7 VV |
1185 | /// is_trivially_default_constructible |
1186 | template<typename _Tp> | |
1187 | struct is_trivially_default_constructible | |
608a080c AP |
1188 | : public __bool_constant<__is_trivially_constructible(_Tp)> |
1189 | { | |
1190 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1191 | "template argument must be a complete class or an unbounded array"); | |
1192 | }; | |
6a9ecd34 | 1193 | |
f7632193 VV |
1194 | struct __do_is_implicitly_default_constructible_impl |
1195 | { | |
1196 | template <typename _Tp> | |
1197 | static void __helper(const _Tp&); | |
1198 | ||
1199 | template <typename _Tp> | |
1200 | static true_type __test(const _Tp&, | |
1201 | decltype(__helper<const _Tp&>({}))* = 0); | |
1202 | ||
1203 | static false_type __test(...); | |
1204 | }; | |
1205 | ||
1206 | template<typename _Tp> | |
1207 | struct __is_implicitly_default_constructible_impl | |
e9029d55 JW |
1208 | : public __do_is_implicitly_default_constructible_impl |
1209 | { | |
1210 | typedef decltype(__test(declval<_Tp>())) type; | |
1211 | }; | |
f7632193 VV |
1212 | |
1213 | template<typename _Tp> | |
1214 | struct __is_implicitly_default_constructible_safe | |
e9029d55 JW |
1215 | : public __is_implicitly_default_constructible_impl<_Tp>::type |
1216 | { }; | |
f7632193 VV |
1217 | |
1218 | template <typename _Tp> | |
1219 | struct __is_implicitly_default_constructible | |
608a080c | 1220 | : public __and_<__is_constructible_impl<_Tp>, |
e9029d55 JW |
1221 | __is_implicitly_default_constructible_safe<_Tp>> |
1222 | { }; | |
f7632193 | 1223 | |
b42cc3ca VV |
1224 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1225 | struct __is_trivially_copy_constructible_impl; | |
1226 | ||
f5e523b7 | 1227 | template<typename _Tp> |
b42cc3ca VV |
1228 | struct __is_trivially_copy_constructible_impl<_Tp, false> |
1229 | : public false_type { }; | |
1230 | ||
1231 | template<typename _Tp> | |
1232 | struct __is_trivially_copy_constructible_impl<_Tp, true> | |
608a080c | 1233 | : public __and_<__is_copy_constructible_impl<_Tp>, |
f5e523b7 | 1234 | integral_constant<bool, |
f7632193 | 1235 | __is_trivially_constructible(_Tp, const _Tp&)>> |
f5e523b7 | 1236 | { }; |
33ac58d5 | 1237 | |
608a080c | 1238 | /// is_trivially_copy_constructible |
b42cc3ca VV |
1239 | template<typename _Tp> |
1240 | struct is_trivially_copy_constructible | |
1241 | : public __is_trivially_copy_constructible_impl<_Tp> | |
608a080c AP |
1242 | { |
1243 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1244 | "template argument must be a complete class or an unbounded array"); | |
1245 | }; | |
b42cc3ca VV |
1246 | |
1247 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1248 | struct __is_trivially_move_constructible_impl; | |
1249 | ||
f5e523b7 | 1250 | template<typename _Tp> |
b42cc3ca VV |
1251 | struct __is_trivially_move_constructible_impl<_Tp, false> |
1252 | : public false_type { }; | |
1253 | ||
1254 | template<typename _Tp> | |
1255 | struct __is_trivially_move_constructible_impl<_Tp, true> | |
608a080c | 1256 | : public __and_<__is_move_constructible_impl<_Tp>, |
f5e523b7 | 1257 | integral_constant<bool, |
f7632193 | 1258 | __is_trivially_constructible(_Tp, _Tp&&)>> |
f5e523b7 | 1259 | { }; |
6a9ecd34 | 1260 | |
608a080c | 1261 | /// is_trivially_move_constructible |
b42cc3ca VV |
1262 | template<typename _Tp> |
1263 | struct is_trivially_move_constructible | |
1264 | : public __is_trivially_move_constructible_impl<_Tp> | |
608a080c AP |
1265 | { |
1266 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1267 | "template argument must be a complete class or an unbounded array"); | |
1268 | }; | |
b42cc3ca | 1269 | |
f5e523b7 VV |
1270 | /// is_trivially_assignable |
1271 | template<typename _Tp, typename _Up> | |
1272 | struct is_trivially_assignable | |
b42cc3ca | 1273 | : public __bool_constant<__is_trivially_assignable(_Tp, _Up)> |
608a080c AP |
1274 | { |
1275 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1276 | "template argument must be a complete class or an unbounded array"); | |
1277 | }; | |
b42cc3ca VV |
1278 | |
1279 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1280 | struct __is_trivially_copy_assignable_impl; | |
1281 | ||
f5e523b7 | 1282 | template<typename _Tp> |
b42cc3ca VV |
1283 | struct __is_trivially_copy_assignable_impl<_Tp, false> |
1284 | : public false_type { }; | |
1285 | ||
1286 | template<typename _Tp> | |
1287 | struct __is_trivially_copy_assignable_impl<_Tp, true> | |
c01f9216 | 1288 | : public __bool_constant<__is_trivially_assignable(_Tp&, const _Tp&)> |
f5e523b7 | 1289 | { }; |
6a9ecd34 | 1290 | |
608a080c | 1291 | /// is_trivially_copy_assignable |
b42cc3ca VV |
1292 | template<typename _Tp> |
1293 | struct is_trivially_copy_assignable | |
1294 | : public __is_trivially_copy_assignable_impl<_Tp> | |
608a080c AP |
1295 | { |
1296 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1297 | "template argument must be a complete class or an unbounded array"); | |
1298 | }; | |
b42cc3ca VV |
1299 | |
1300 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1301 | struct __is_trivially_move_assignable_impl; | |
1302 | ||
f5e523b7 | 1303 | template<typename _Tp> |
b42cc3ca VV |
1304 | struct __is_trivially_move_assignable_impl<_Tp, false> |
1305 | : public false_type { }; | |
1306 | ||
1307 | template<typename _Tp> | |
1308 | struct __is_trivially_move_assignable_impl<_Tp, true> | |
c01f9216 | 1309 | : public __bool_constant<__is_trivially_assignable(_Tp&, _Tp&&)> |
f5e523b7 | 1310 | { }; |
6a9ecd34 | 1311 | |
608a080c | 1312 | /// is_trivially_move_assignable |
b42cc3ca VV |
1313 | template<typename _Tp> |
1314 | struct is_trivially_move_assignable | |
1315 | : public __is_trivially_move_assignable_impl<_Tp> | |
608a080c AP |
1316 | { |
1317 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1318 | "template argument must be a complete class or an unbounded array"); | |
1319 | }; | |
b42cc3ca | 1320 | |
6a9ecd34 PC |
1321 | /// is_trivially_destructible |
1322 | template<typename _Tp> | |
1323 | struct is_trivially_destructible | |
608a080c | 1324 | : public __and_<__is_destructible_safe<_Tp>, |
c01f9216 | 1325 | __bool_constant<__has_trivial_destructor(_Tp)>> |
608a080c AP |
1326 | { |
1327 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1328 | "template argument must be a complete class or an unbounded array"); | |
1329 | }; | |
6a9ecd34 | 1330 | |
e133ace8 | 1331 | |
123c516a PC |
1332 | /// has_virtual_destructor |
1333 | template<typename _Tp> | |
1334 | struct has_virtual_destructor | |
1335 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
608a080c AP |
1336 | { |
1337 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1338 | "template argument must be a complete class or an unbounded array"); | |
1339 | }; | |
123c516a | 1340 | |
33ac58d5 | 1341 | |
123c516a PC |
1342 | // type property queries. |
1343 | ||
1344 | /// alignment_of | |
1345 | template<typename _Tp> | |
1346 | struct alignment_of | |
608a080c AP |
1347 | : public integral_constant<std::size_t, alignof(_Tp)> |
1348 | { | |
1349 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1350 | "template argument must be a complete class or an unbounded array"); | |
1351 | }; | |
33ac58d5 | 1352 | |
123c516a PC |
1353 | /// rank |
1354 | template<typename> | |
1355 | struct rank | |
1356 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1357 | |
123c516a PC |
1358 | template<typename _Tp, std::size_t _Size> |
1359 | struct rank<_Tp[_Size]> | |
1360 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1361 | ||
1362 | template<typename _Tp> | |
1363 | struct rank<_Tp[]> | |
1364 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1365 | ||
1366 | /// extent | |
1367 | template<typename, unsigned _Uint> | |
1368 | struct extent | |
1369 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1370 | |
123c516a PC |
1371 | template<typename _Tp, unsigned _Uint, std::size_t _Size> |
1372 | struct extent<_Tp[_Size], _Uint> | |
1373 | : public integral_constant<std::size_t, | |
1374 | _Uint == 0 ? _Size : extent<_Tp, | |
1375 | _Uint - 1>::value> | |
1376 | { }; | |
1377 | ||
1378 | template<typename _Tp, unsigned _Uint> | |
1379 | struct extent<_Tp[], _Uint> | |
1380 | : public integral_constant<std::size_t, | |
1381 | _Uint == 0 ? 0 : extent<_Tp, | |
1382 | _Uint - 1>::value> | |
1383 | { }; | |
1384 | ||
1385 | ||
c0ffa2ba | 1386 | // Type relations. |
123c516a PC |
1387 | |
1388 | /// is_same | |
1389 | template<typename, typename> | |
1390 | struct is_same | |
1391 | : public false_type { }; | |
1392 | ||
1393 | template<typename _Tp> | |
1394 | struct is_same<_Tp, _Tp> | |
1395 | : public true_type { }; | |
b0302c68 | 1396 | |
939759fc | 1397 | /// is_base_of |
e133ace8 PC |
1398 | template<typename _Base, typename _Derived> |
1399 | struct is_base_of | |
1400 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1401 | { }; | |
1402 | ||
297f34d7 | 1403 | template<typename _From, typename _To, |
123c516a PC |
1404 | bool = __or_<is_void<_From>, is_function<_To>, |
1405 | is_array<_To>>::value> | |
297f34d7 | 1406 | struct __is_convertible_helper |
8df27fcb JW |
1407 | { |
1408 | typedef typename is_void<_To>::type type; | |
8df27fcb | 1409 | }; |
297f34d7 | 1410 | |
cc28d234 JW |
1411 | #pragma GCC diagnostic push |
1412 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
e133ace8 | 1413 | template<typename _From, typename _To> |
b0302c68 | 1414 | class __is_convertible_helper<_From, _To, false> |
e133ace8 | 1415 | { |
8df27fcb JW |
1416 | template<typename _To1> |
1417 | static void __test_aux(_To1) noexcept; | |
8e7d962a | 1418 | |
82b12c4b FD |
1419 | template<typename _From1, typename _To1, |
1420 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1421 | static true_type | |
8e7d962a PC |
1422 | __test(int); |
1423 | ||
1424 | template<typename, typename> | |
82b12c4b FD |
1425 | static false_type |
1426 | __test(...); | |
297f34d7 | 1427 | |
e133ace8 | 1428 | public: |
82b12c4b | 1429 | typedef decltype(__test<_From, _To>(0)) type; |
e133ace8 | 1430 | }; |
cc28d234 | 1431 | #pragma GCC diagnostic pop |
82b12c4b | 1432 | |
b0302c68 | 1433 | /// is_convertible |
e133ace8 PC |
1434 | template<typename _From, typename _To> |
1435 | struct is_convertible | |
82b12c4b | 1436 | : public __is_convertible_helper<_From, _To>::type |
e133ace8 PC |
1437 | { }; |
1438 | ||
608a080c | 1439 | template<typename _From, typename _To, |
ed99e818 JW |
1440 | bool = __or_<is_void<_From>, is_function<_To>, |
1441 | is_array<_To>>::value> | |
1442 | struct __is_nt_convertible_helper | |
1443 | : is_void<_To> | |
1444 | { }; | |
1445 | ||
cc28d234 JW |
1446 | #pragma GCC diagnostic push |
1447 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
ed99e818 JW |
1448 | template<typename _From, typename _To> |
1449 | class __is_nt_convertible_helper<_From, _To, false> | |
1450 | { | |
1451 | template<typename _To1> | |
1452 | static void __test_aux(_To1) noexcept; | |
1453 | ||
1454 | template<typename _From1, typename _To1> | |
ce9f305e JW |
1455 | static |
1456 | __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))> | |
ed99e818 JW |
1457 | __test(int); |
1458 | ||
1459 | template<typename, typename> | |
1460 | static false_type | |
1461 | __test(...); | |
1462 | ||
1463 | public: | |
1464 | using type = decltype(__test<_From, _To>(0)); | |
1465 | }; | |
cc28d234 | 1466 | #pragma GCC diagnostic pop |
ed99e818 | 1467 | |
ce9f305e JW |
1468 | // is_nothrow_convertible for C++11 |
1469 | template<typename _From, typename _To> | |
1470 | struct __is_nothrow_convertible | |
1471 | : public __is_nt_convertible_helper<_From, _To>::type | |
1472 | { }; | |
1473 | ||
1474 | #if __cplusplus > 201703L | |
8df27fcb JW |
1475 | /// is_nothrow_convertible |
1476 | template<typename _From, typename _To> | |
1477 | struct is_nothrow_convertible | |
ed99e818 | 1478 | : public __is_nt_convertible_helper<_From, _To>::type |
8df27fcb JW |
1479 | { }; |
1480 | ||
1481 | /// is_nothrow_convertible_v | |
1482 | template<typename _From, typename _To> | |
1483 | inline constexpr bool is_nothrow_convertible_v | |
1484 | = is_nothrow_convertible<_From, _To>::value; | |
1485 | #endif // C++2a | |
fd735b6a | 1486 | |
c0ffa2ba | 1487 | // Const-volatile modifications. |
7b50cdef | 1488 | |
123c516a | 1489 | /// remove_const |
7b50cdef | 1490 | template<typename _Tp> |
123c516a PC |
1491 | struct remove_const |
1492 | { typedef _Tp type; }; | |
7b50cdef | 1493 | |
123c516a PC |
1494 | template<typename _Tp> |
1495 | struct remove_const<_Tp const> | |
1496 | { typedef _Tp type; }; | |
33ac58d5 | 1497 | |
123c516a PC |
1498 | /// remove_volatile |
1499 | template<typename _Tp> | |
1500 | struct remove_volatile | |
1501 | { typedef _Tp type; }; | |
7b50cdef | 1502 | |
123c516a PC |
1503 | template<typename _Tp> |
1504 | struct remove_volatile<_Tp volatile> | |
1505 | { typedef _Tp type; }; | |
33ac58d5 | 1506 | |
123c516a PC |
1507 | /// remove_cv |
1508 | template<typename _Tp> | |
1509 | struct remove_cv | |
1510 | { | |
1511 | typedef typename | |
1512 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1513 | }; | |
33ac58d5 | 1514 | |
123c516a PC |
1515 | /// add_const |
1516 | template<typename _Tp> | |
1517 | struct add_const | |
1518 | { typedef _Tp const type; }; | |
33ac58d5 | 1519 | |
123c516a PC |
1520 | /// add_volatile |
1521 | template<typename _Tp> | |
1522 | struct add_volatile | |
1523 | { typedef _Tp volatile type; }; | |
33ac58d5 | 1524 | |
123c516a PC |
1525 | /// add_cv |
1526 | template<typename _Tp> | |
1527 | struct add_cv | |
1528 | { | |
1529 | typedef typename | |
1530 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1531 | }; | |
7b50cdef | 1532 | |
4457e88c | 1533 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
1534 | |
1535 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1536 | ||
4457e88c JW |
1537 | /// Alias template for remove_const |
1538 | template<typename _Tp> | |
1539 | using remove_const_t = typename remove_const<_Tp>::type; | |
1540 | ||
1541 | /// Alias template for remove_volatile | |
1542 | template<typename _Tp> | |
1543 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1544 | ||
1545 | /// Alias template for remove_cv | |
1546 | template<typename _Tp> | |
1547 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1548 | ||
1549 | /// Alias template for add_const | |
1550 | template<typename _Tp> | |
1551 | using add_const_t = typename add_const<_Tp>::type; | |
1552 | ||
1553 | /// Alias template for add_volatile | |
1554 | template<typename _Tp> | |
1555 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1556 | ||
1557 | /// Alias template for add_cv | |
1558 | template<typename _Tp> | |
1559 | using add_cv_t = typename add_cv<_Tp>::type; | |
1560 | #endif | |
7b50cdef | 1561 | |
123c516a | 1562 | // Reference transformations. |
7b50cdef | 1563 | |
123c516a PC |
1564 | /// remove_reference |
1565 | template<typename _Tp> | |
1566 | struct remove_reference | |
1567 | { typedef _Tp type; }; | |
7b50cdef | 1568 | |
123c516a PC |
1569 | template<typename _Tp> |
1570 | struct remove_reference<_Tp&> | |
1571 | { typedef _Tp type; }; | |
7b50cdef | 1572 | |
123c516a PC |
1573 | template<typename _Tp> |
1574 | struct remove_reference<_Tp&&> | |
1575 | { typedef _Tp type; }; | |
1576 | ||
89898034 | 1577 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1578 | struct __add_lvalue_reference_helper |
1579 | { typedef _Tp type; }; | |
7b50cdef | 1580 | |
5e108459 | 1581 | template<typename _Tp> |
89898034 | 1582 | struct __add_lvalue_reference_helper<_Tp, true> |
123c516a | 1583 | { typedef _Tp& type; }; |
5e108459 | 1584 | |
123c516a | 1585 | /// add_lvalue_reference |
5e108459 | 1586 | template<typename _Tp> |
123c516a PC |
1587 | struct add_lvalue_reference |
1588 | : public __add_lvalue_reference_helper<_Tp> | |
1589 | { }; | |
1590 | ||
89898034 | 1591 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1592 | struct __add_rvalue_reference_helper |
1593 | { typedef _Tp type; }; | |
5e108459 PC |
1594 | |
1595 | template<typename _Tp> | |
123c516a PC |
1596 | struct __add_rvalue_reference_helper<_Tp, true> |
1597 | { typedef _Tp&& type; }; | |
5e108459 | 1598 | |
123c516a | 1599 | /// add_rvalue_reference |
5e108459 | 1600 | template<typename _Tp> |
123c516a PC |
1601 | struct add_rvalue_reference |
1602 | : public __add_rvalue_reference_helper<_Tp> | |
1603 | { }; | |
5e108459 | 1604 | |
4457e88c JW |
1605 | #if __cplusplus > 201103L |
1606 | /// Alias template for remove_reference | |
1607 | template<typename _Tp> | |
1608 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1609 | ||
1610 | /// Alias template for add_lvalue_reference | |
1611 | template<typename _Tp> | |
1612 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1613 | ||
1614 | /// Alias template for add_rvalue_reference | |
1615 | template<typename _Tp> | |
1616 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1617 | #endif | |
7b50cdef | 1618 | |
c0ffa2ba | 1619 | // Sign modifications. |
123c516a | 1620 | |
7b50cdef BK |
1621 | // Utility for constructing identically cv-qualified types. |
1622 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1623 | struct __cv_selector; | |
1624 | ||
1625 | template<typename _Unqualified> | |
1626 | struct __cv_selector<_Unqualified, false, false> | |
1627 | { typedef _Unqualified __type; }; | |
1628 | ||
1629 | template<typename _Unqualified> | |
1630 | struct __cv_selector<_Unqualified, false, true> | |
1631 | { typedef volatile _Unqualified __type; }; | |
1632 | ||
1633 | template<typename _Unqualified> | |
1634 | struct __cv_selector<_Unqualified, true, false> | |
1635 | { typedef const _Unqualified __type; }; | |
1636 | ||
1637 | template<typename _Unqualified> | |
1638 | struct __cv_selector<_Unqualified, true, true> | |
1639 | { typedef const volatile _Unqualified __type; }; | |
1640 | ||
1641 | template<typename _Qualified, typename _Unqualified, | |
1642 | bool _IsConst = is_const<_Qualified>::value, | |
1643 | bool _IsVol = is_volatile<_Qualified>::value> | |
b0302c68 | 1644 | class __match_cv_qualifiers |
7b50cdef | 1645 | { |
7b50cdef BK |
1646 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1647 | ||
1648 | public: | |
33ac58d5 | 1649 | typedef typename __match::__type __type; |
7b50cdef BK |
1650 | }; |
1651 | ||
7b50cdef BK |
1652 | // Utility for finding the unsigned versions of signed integral types. |
1653 | template<typename _Tp> | |
e133ace8 PC |
1654 | struct __make_unsigned |
1655 | { typedef _Tp __type; }; | |
7b50cdef BK |
1656 | |
1657 | template<> | |
1658 | struct __make_unsigned<char> | |
1659 | { typedef unsigned char __type; }; | |
1660 | ||
1661 | template<> | |
1662 | struct __make_unsigned<signed char> | |
1663 | { typedef unsigned char __type; }; | |
1664 | ||
7b50cdef BK |
1665 | template<> |
1666 | struct __make_unsigned<short> | |
1667 | { typedef unsigned short __type; }; | |
1668 | ||
1669 | template<> | |
1670 | struct __make_unsigned<int> | |
1671 | { typedef unsigned int __type; }; | |
1672 | ||
1673 | template<> | |
1674 | struct __make_unsigned<long> | |
1675 | { typedef unsigned long __type; }; | |
1676 | ||
1677 | template<> | |
1678 | struct __make_unsigned<long long> | |
1679 | { typedef unsigned long long __type; }; | |
1680 | ||
78a7c317 DD |
1681 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1682 | template<> | |
1683 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1684 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1685 | #endif | |
1686 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1687 | template<> | |
1688 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1689 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1690 | #endif | |
1691 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
6d585f01 | 1692 | template<> |
78a7c317 DD |
1693 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1694 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1695 | #endif | |
1696 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1697 | template<> | |
1698 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1699 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1700 | #endif |
1701 | ||
7b50cdef | 1702 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1703 | template<typename _Tp, |
7b50cdef | 1704 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1705 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1706 | class __make_unsigned_selector; |
1707 | ||
7b50cdef | 1708 | template<typename _Tp> |
b0302c68 | 1709 | class __make_unsigned_selector<_Tp, true, false> |
7b50cdef | 1710 | { |
22f1f4c7 JW |
1711 | using __unsigned_type |
1712 | = typename __make_unsigned<typename remove_cv<_Tp>::type>::__type; | |
7b50cdef BK |
1713 | |
1714 | public: | |
22f1f4c7 JW |
1715 | using __type |
1716 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
7b50cdef BK |
1717 | }; |
1718 | ||
22f1f4c7 JW |
1719 | class __make_unsigned_selector_base |
1720 | { | |
1721 | protected: | |
1722 | template<typename...> struct _List { }; | |
1723 | ||
1724 | template<typename _Tp, typename... _Up> | |
1725 | struct _List<_Tp, _Up...> : _List<_Up...> | |
1726 | { static constexpr size_t __size = sizeof(_Tp); }; | |
1727 | ||
1728 | template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)> | |
1729 | struct __select; | |
1730 | ||
1731 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1732 | struct __select<_Sz, _List<_Uint, _UInts...>, true> | |
1733 | { using __type = _Uint; }; | |
1734 | ||
1735 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1736 | struct __select<_Sz, _List<_Uint, _UInts...>, false> | |
1737 | : __select<_Sz, _List<_UInts...>> | |
1738 | { }; | |
1739 | }; | |
1740 | ||
1741 | // Choose unsigned integer type with the smallest rank and same size as _Tp | |
7b50cdef | 1742 | template<typename _Tp> |
b0302c68 | 1743 | class __make_unsigned_selector<_Tp, false, true> |
22f1f4c7 | 1744 | : __make_unsigned_selector_base |
7b50cdef | 1745 | { |
a0230468 | 1746 | // With -fshort-enums, an enum may be as small as a char. |
22f1f4c7 JW |
1747 | using _UInts = _List<unsigned char, unsigned short, unsigned int, |
1748 | unsigned long, unsigned long long>; | |
1749 | ||
1750 | using __unsigned_type = typename __select<sizeof(_Tp), _UInts>::__type; | |
73d81d3a | 1751 | |
7b50cdef | 1752 | public: |
22f1f4c7 JW |
1753 | using __type |
1754 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
1755 | }; | |
1756 | ||
c124af93 TH |
1757 | // wchar_t, char8_t, char16_t and char32_t are integral types but are |
1758 | // neither signed integer types nor unsigned integer types, so must be | |
22f1f4c7 JW |
1759 | // transformed to the unsigned integer type with the smallest rank. |
1760 | // Use the partial specialization for enumeration types to do that. | |
1761 | #if defined(_GLIBCXX_USE_WCHAR_T) | |
1762 | template<> | |
1763 | struct __make_unsigned<wchar_t> | |
1764 | { | |
1765 | using __type | |
1766 | = typename __make_unsigned_selector<wchar_t, false, true>::__type; | |
1767 | }; | |
1768 | #endif | |
1769 | ||
c124af93 TH |
1770 | #ifdef _GLIBCXX_USE_CHAR8_T |
1771 | template<> | |
1772 | struct __make_unsigned<char8_t> | |
1773 | { | |
1774 | using __type | |
1775 | = typename __make_unsigned_selector<char8_t, false, true>::__type; | |
1776 | }; | |
1777 | #endif | |
1778 | ||
22f1f4c7 JW |
1779 | template<> |
1780 | struct __make_unsigned<char16_t> | |
1781 | { | |
1782 | using __type | |
1783 | = typename __make_unsigned_selector<char16_t, false, true>::__type; | |
1784 | }; | |
1785 | ||
1786 | template<> | |
1787 | struct __make_unsigned<char32_t> | |
1788 | { | |
1789 | using __type | |
1790 | = typename __make_unsigned_selector<char32_t, false, true>::__type; | |
7b50cdef BK |
1791 | }; |
1792 | ||
7b50cdef BK |
1793 | // Given an integral/enum type, return the corresponding unsigned |
1794 | // integer type. | |
5b9daa7e BK |
1795 | // Primary template. |
1796 | /// make_unsigned | |
7b50cdef | 1797 | template<typename _Tp> |
33ac58d5 | 1798 | struct make_unsigned |
7b50cdef BK |
1799 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
1800 | ||
1801 | // Integral, but don't define. | |
1802 | template<> | |
1803 | struct make_unsigned<bool>; | |
1804 | ||
1805 | ||
1806 | // Utility for finding the signed versions of unsigned integral types. | |
1807 | template<typename _Tp> | |
e133ace8 PC |
1808 | struct __make_signed |
1809 | { typedef _Tp __type; }; | |
7b50cdef BK |
1810 | |
1811 | template<> | |
1812 | struct __make_signed<char> | |
1813 | { typedef signed char __type; }; | |
1814 | ||
1815 | template<> | |
1816 | struct __make_signed<unsigned char> | |
1817 | { typedef signed char __type; }; | |
1818 | ||
7b50cdef BK |
1819 | template<> |
1820 | struct __make_signed<unsigned short> | |
1821 | { typedef signed short __type; }; | |
1822 | ||
1823 | template<> | |
1824 | struct __make_signed<unsigned int> | |
1825 | { typedef signed int __type; }; | |
1826 | ||
1827 | template<> | |
1828 | struct __make_signed<unsigned long> | |
1829 | { typedef signed long __type; }; | |
1830 | ||
1831 | template<> | |
1832 | struct __make_signed<unsigned long long> | |
1833 | { typedef signed long long __type; }; | |
1834 | ||
78a7c317 DD |
1835 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1836 | template<> | |
1837 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1838 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1839 | #endif | |
1840 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1841 | template<> | |
1842 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1843 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1844 | #endif | |
1845 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1846 | template<> | |
1847 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1848 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1849 | #endif | |
1850 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
6d585f01 | 1851 | template<> |
78a7c317 DD |
1852 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1853 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1854 | #endif |
1855 | ||
fb8ffd10 | 1856 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1857 | template<typename _Tp, |
7b50cdef | 1858 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1859 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1860 | class __make_signed_selector; |
1861 | ||
7b50cdef | 1862 | template<typename _Tp> |
b0302c68 | 1863 | class __make_signed_selector<_Tp, true, false> |
7b50cdef | 1864 | { |
22f1f4c7 JW |
1865 | using __signed_type |
1866 | = typename __make_signed<typename remove_cv<_Tp>::type>::__type; | |
7b50cdef BK |
1867 | |
1868 | public: | |
22f1f4c7 JW |
1869 | using __type |
1870 | = typename __match_cv_qualifiers<_Tp, __signed_type>::__type; | |
7b50cdef BK |
1871 | }; |
1872 | ||
22f1f4c7 | 1873 | // Choose signed integer type with the smallest rank and same size as _Tp |
7b50cdef | 1874 | template<typename _Tp> |
b0302c68 | 1875 | class __make_signed_selector<_Tp, false, true> |
7b50cdef | 1876 | { |
73d81d3a | 1877 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
7b50cdef BK |
1878 | |
1879 | public: | |
73d81d3a | 1880 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
7b50cdef BK |
1881 | }; |
1882 | ||
22f1f4c7 | 1883 | // wchar_t, char16_t and char32_t are integral types but are neither |
d4b695e4 | 1884 | // signed integer types nor unsigned integer types, so must be |
22f1f4c7 JW |
1885 | // transformed to the signed integer type with the smallest rank. |
1886 | // Use the partial specialization for enumeration types to do that. | |
1887 | #if defined(_GLIBCXX_USE_WCHAR_T) | |
1888 | template<> | |
1889 | struct __make_signed<wchar_t> | |
1890 | { | |
1891 | using __type | |
1892 | = typename __make_signed_selector<wchar_t, false, true>::__type; | |
1893 | }; | |
1894 | #endif | |
1895 | ||
c124af93 TH |
1896 | #if defined(_GLIBCXX_USE_CHAR8_T) |
1897 | template<> | |
1898 | struct __make_signed<char8_t> | |
1899 | { | |
1900 | using __type | |
1901 | = typename __make_signed_selector<char8_t, false, true>::__type; | |
1902 | }; | |
1903 | #endif | |
1904 | ||
22f1f4c7 JW |
1905 | template<> |
1906 | struct __make_signed<char16_t> | |
1907 | { | |
1908 | using __type | |
1909 | = typename __make_signed_selector<char16_t, false, true>::__type; | |
1910 | }; | |
1911 | ||
1912 | template<> | |
1913 | struct __make_signed<char32_t> | |
1914 | { | |
1915 | using __type | |
1916 | = typename __make_signed_selector<char32_t, false, true>::__type; | |
1917 | }; | |
1918 | ||
7b50cdef BK |
1919 | // Given an integral/enum type, return the corresponding signed |
1920 | // integer type. | |
5b9daa7e BK |
1921 | // Primary template. |
1922 | /// make_signed | |
7b50cdef | 1923 | template<typename _Tp> |
33ac58d5 | 1924 | struct make_signed |
7b50cdef BK |
1925 | { typedef typename __make_signed_selector<_Tp>::__type type; }; |
1926 | ||
1927 | // Integral, but don't define. | |
1928 | template<> | |
1929 | struct make_signed<bool>; | |
cfa9a96b | 1930 | |
4457e88c JW |
1931 | #if __cplusplus > 201103L |
1932 | /// Alias template for make_signed | |
1933 | template<typename _Tp> | |
1934 | using make_signed_t = typename make_signed<_Tp>::type; | |
1935 | ||
1936 | /// Alias template for make_unsigned | |
1937 | template<typename _Tp> | |
1938 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1939 | #endif | |
123c516a | 1940 | |
c0ffa2ba | 1941 | // Array modifications. |
123c516a PC |
1942 | |
1943 | /// remove_extent | |
1944 | template<typename _Tp> | |
1945 | struct remove_extent | |
1946 | { typedef _Tp type; }; | |
1947 | ||
1948 | template<typename _Tp, std::size_t _Size> | |
1949 | struct remove_extent<_Tp[_Size]> | |
1950 | { typedef _Tp type; }; | |
1951 | ||
1952 | template<typename _Tp> | |
1953 | struct remove_extent<_Tp[]> | |
1954 | { typedef _Tp type; }; | |
1955 | ||
1956 | /// remove_all_extents | |
1957 | template<typename _Tp> | |
1958 | struct remove_all_extents | |
1959 | { typedef _Tp type; }; | |
1960 | ||
1961 | template<typename _Tp, std::size_t _Size> | |
1962 | struct remove_all_extents<_Tp[_Size]> | |
1963 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1964 | ||
1965 | template<typename _Tp> | |
1966 | struct remove_all_extents<_Tp[]> | |
1967 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1968 | ||
4457e88c JW |
1969 | #if __cplusplus > 201103L |
1970 | /// Alias template for remove_extent | |
1971 | template<typename _Tp> | |
1972 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1973 | ||
1974 | /// Alias template for remove_all_extents | |
1975 | template<typename _Tp> | |
1976 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1977 | #endif | |
123c516a | 1978 | |
c0ffa2ba | 1979 | // Pointer modifications. |
123c516a PC |
1980 | |
1981 | template<typename _Tp, typename> | |
1982 | struct __remove_pointer_helper | |
1983 | { typedef _Tp type; }; | |
1984 | ||
1985 | template<typename _Tp, typename _Up> | |
1986 | struct __remove_pointer_helper<_Tp, _Up*> | |
1987 | { typedef _Up type; }; | |
1988 | ||
1989 | /// remove_pointer | |
1990 | template<typename _Tp> | |
1991 | struct remove_pointer | |
1992 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1993 | { }; | |
1994 | ||
1995 | /// add_pointer | |
89898034 DK |
1996 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1997 | is_void<_Tp>>::value> | |
1998 | struct __add_pointer_helper | |
1999 | { typedef _Tp type; }; | |
2000 | ||
123c516a | 2001 | template<typename _Tp> |
89898034 | 2002 | struct __add_pointer_helper<_Tp, true> |
123c516a PC |
2003 | { typedef typename remove_reference<_Tp>::type* type; }; |
2004 | ||
89898034 | 2005 | template<typename _Tp> |
33ac58d5 | 2006 | struct add_pointer |
89898034 DK |
2007 | : public __add_pointer_helper<_Tp> |
2008 | { }; | |
2009 | ||
4457e88c JW |
2010 | #if __cplusplus > 201103L |
2011 | /// Alias template for remove_pointer | |
2012 | template<typename _Tp> | |
2013 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
2014 | ||
2015 | /// Alias template for add_pointer | |
2016 | template<typename _Tp> | |
2017 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
2018 | #endif | |
123c516a PC |
2019 | |
2020 | template<std::size_t _Len> | |
2021 | struct __aligned_storage_msa | |
33ac58d5 | 2022 | { |
123c516a PC |
2023 | union __type |
2024 | { | |
2025 | unsigned char __data[_Len]; | |
33ac58d5 | 2026 | struct __attribute__((__aligned__)) { } __align; |
123c516a PC |
2027 | }; |
2028 | }; | |
2029 | ||
2030 | /** | |
2031 | * @brief Alignment type. | |
2032 | * | |
2033 | * The value of _Align is a default-alignment which shall be the | |
2034 | * most stringent alignment requirement for any C++ object type | |
2035 | * whose size is no greater than _Len (3.9). The member typedef | |
2036 | * type shall be a POD type suitable for use as uninitialized | |
2037 | * storage for any object whose size is at most _Len and whose | |
2038 | * alignment is a divisor of _Align. | |
2039 | */ | |
2040 | template<std::size_t _Len, std::size_t _Align = | |
2041 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2042 | struct aligned_storage | |
33ac58d5 | 2043 | { |
123c516a PC |
2044 | union type |
2045 | { | |
2046 | unsigned char __data[_Len]; | |
33ac58d5 | 2047 | struct __attribute__((__aligned__((_Align)))) { } __align; |
123c516a PC |
2048 | }; |
2049 | }; | |
2050 | ||
d3718027 RS |
2051 | template <typename... _Types> |
2052 | struct __strictest_alignment | |
2053 | { | |
2054 | static const size_t _S_alignment = 0; | |
2055 | static const size_t _S_size = 0; | |
2056 | }; | |
2057 | ||
2058 | template <typename _Tp, typename... _Types> | |
2059 | struct __strictest_alignment<_Tp, _Types...> | |
2060 | { | |
2061 | static const size_t _S_alignment = | |
2062 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2063 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2064 | static const size_t _S_size = | |
2065 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2066 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2067 | }; | |
2068 | ||
2069 | /** | |
2070 | * @brief Provide aligned storage for types. | |
2071 | * | |
2072 | * [meta.trans.other] | |
2073 | * | |
2074 | * Provides aligned storage for any of the provided types of at | |
2075 | * least size _Len. | |
2076 | * | |
2077 | * @see aligned_storage | |
2078 | */ | |
2079 | template <size_t _Len, typename... _Types> | |
2080 | struct aligned_union | |
2081 | { | |
2082 | private: | |
2083 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2084 | ||
2085 | using __strictest = __strictest_alignment<_Types...>; | |
2086 | static const size_t _S_len = _Len > __strictest::_S_size | |
2087 | ? _Len : __strictest::_S_size; | |
2088 | public: | |
2089 | /// The value of the strictest alignment of _Types. | |
2090 | static const size_t alignment_value = __strictest::_S_alignment; | |
2091 | /// The storage. | |
2092 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2093 | }; | |
2094 | ||
2095 | template <size_t _Len, typename... _Types> | |
2096 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
123c516a PC |
2097 | |
2098 | // Decay trait for arrays and functions, used for perfect forwarding | |
2099 | // in make_pair, make_tuple, etc. | |
33ac58d5 | 2100 | template<typename _Up, |
123c516a | 2101 | bool _IsArray = is_array<_Up>::value, |
33ac58d5 | 2102 | bool _IsFunction = is_function<_Up>::value> |
123c516a PC |
2103 | struct __decay_selector; |
2104 | ||
2105 | // NB: DR 705. | |
33ac58d5 | 2106 | template<typename _Up> |
123c516a PC |
2107 | struct __decay_selector<_Up, false, false> |
2108 | { typedef typename remove_cv<_Up>::type __type; }; | |
2109 | ||
33ac58d5 | 2110 | template<typename _Up> |
123c516a PC |
2111 | struct __decay_selector<_Up, true, false> |
2112 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2113 | ||
33ac58d5 | 2114 | template<typename _Up> |
123c516a PC |
2115 | struct __decay_selector<_Up, false, true> |
2116 | { typedef typename add_pointer<_Up>::type __type; }; | |
2117 | ||
2118 | /// decay | |
33ac58d5 JW |
2119 | template<typename _Tp> |
2120 | class decay | |
2121 | { | |
123c516a PC |
2122 | typedef typename remove_reference<_Tp>::type __remove_type; |
2123 | ||
2124 | public: | |
2125 | typedef typename __decay_selector<__remove_type>::__type type; | |
2126 | }; | |
2127 | ||
2128 | template<typename _Tp> | |
2129 | class reference_wrapper; | |
2130 | ||
2131 | // Helper which adds a reference to a type when given a reference_wrapper | |
2132 | template<typename _Tp> | |
2133 | struct __strip_reference_wrapper | |
2134 | { | |
2135 | typedef _Tp __type; | |
2136 | }; | |
2137 | ||
2138 | template<typename _Tp> | |
2139 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2140 | { | |
2141 | typedef _Tp& __type; | |
2142 | }; | |
2143 | ||
123c516a PC |
2144 | template<typename _Tp> |
2145 | struct __decay_and_strip | |
2146 | { | |
2147 | typedef typename __strip_reference_wrapper< | |
2148 | typename decay<_Tp>::type>::__type __type; | |
2149 | }; | |
2150 | ||
2151 | ||
123c516a | 2152 | // Primary template. |
13901e4b | 2153 | /// Define a member typedef @c type only if a boolean constant is true. |
123c516a | 2154 | template<bool, typename _Tp = void> |
33ac58d5 | 2155 | struct enable_if |
123c516a PC |
2156 | { }; |
2157 | ||
2158 | // Partial specialization for true. | |
2159 | template<typename _Tp> | |
2160 | struct enable_if<true, _Tp> | |
2161 | { typedef _Tp type; }; | |
2162 | ||
23df8534 JW |
2163 | template<typename... _Cond> |
2164 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
123c516a | 2165 | |
123c516a | 2166 | // Primary template. |
13901e4b | 2167 | /// Define a member typedef @c type to one of two argument types. |
123c516a PC |
2168 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2169 | struct conditional | |
2170 | { typedef _Iftrue type; }; | |
2171 | ||
2172 | // Partial specialization for false. | |
2173 | template<typename _Iftrue, typename _Iffalse> | |
2174 | struct conditional<false, _Iftrue, _Iffalse> | |
2175 | { typedef _Iffalse type; }; | |
2176 | ||
5b9daa7e | 2177 | /// common_type |
cfa9a96b CF |
2178 | template<typename... _Tp> |
2179 | struct common_type; | |
2180 | ||
c0ffa2ba | 2181 | // Sfinae-friendly common_type implementation: |
b3618b71 DK |
2182 | |
2183 | struct __do_common_type_impl | |
2184 | { | |
2185 | template<typename _Tp, typename _Up> | |
f61a12b3 JW |
2186 | using __cond_t |
2187 | = decltype(true ? std::declval<_Tp>() : std::declval<_Up>()); | |
2188 | ||
2189 | template<typename _Tp, typename _Up> | |
2190 | static __success_type<typename decay<__cond_t<_Tp, _Up>>::type> | |
2191 | _S_test(int); | |
b3618b71 DK |
2192 | |
2193 | template<typename, typename> | |
f61a12b3 JW |
2194 | static __failure_type |
2195 | _S_test(...); | |
b3618b71 DK |
2196 | }; |
2197 | ||
f61a12b3 JW |
2198 | // If sizeof...(T) is zero, there shall be no member type. |
2199 | template<> | |
2200 | struct common_type<> | |
2201 | { }; | |
b3618b71 | 2202 | |
f61a12b3 JW |
2203 | // If sizeof...(T) is one, the same type, if any, as common_type_t<T0, T0>. |
2204 | template<typename _Tp0> | |
2205 | struct common_type<_Tp0> | |
2206 | : public common_type<_Tp0, _Tp0> | |
2207 | { }; | |
b3618b71 | 2208 | |
f61a12b3 JW |
2209 | // If sizeof...(T) is two, ... |
2210 | template<typename _Tp1, typename _Tp2, | |
2211 | typename _Dp1 = typename decay<_Tp1>::type, | |
2212 | typename _Dp2 = typename decay<_Tp2>::type> | |
2213 | struct __common_type_impl | |
b3618b71 | 2214 | { |
f61a12b3 JW |
2215 | // If is_same_v<T1, D1> is false or is_same_v<T2, D2> is false, |
2216 | // let C denote the same type, if any, as common_type_t<D1, D2>. | |
2217 | using type = common_type<_Dp1, _Dp2>; | |
b3618b71 DK |
2218 | }; |
2219 | ||
f61a12b3 JW |
2220 | template<typename _Tp1, typename _Tp2> |
2221 | struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2> | |
2222 | : private __do_common_type_impl | |
b3618b71 | 2223 | { |
f61a12b3 JW |
2224 | // Otherwise, if decay_t<decltype(false ? declval<D1>() : declval<D2>())> |
2225 | // denotes a valid type, let C denote that type. | |
2226 | using type = decltype(_S_test<_Tp1, _Tp2>(0)); | |
b3618b71 DK |
2227 | }; |
2228 | ||
f61a12b3 JW |
2229 | // If sizeof...(T) is two, ... |
2230 | template<typename _Tp1, typename _Tp2> | |
2231 | struct common_type<_Tp1, _Tp2> | |
2232 | : public __common_type_impl<_Tp1, _Tp2>::type | |
2233 | { }; | |
b3618b71 | 2234 | |
f61a12b3 JW |
2235 | template<typename...> |
2236 | struct __common_type_pack | |
373c726e JW |
2237 | { }; |
2238 | ||
f61a12b3 JW |
2239 | template<typename, typename, typename = void> |
2240 | struct __common_type_fold; | |
2241 | ||
2242 | // If sizeof...(T) is greater than two, ... | |
2243 | template<typename _Tp1, typename _Tp2, typename... _Rp> | |
2244 | struct common_type<_Tp1, _Tp2, _Rp...> | |
2245 | : public __common_type_fold<common_type<_Tp1, _Tp2>, | |
2246 | __common_type_pack<_Rp...>> | |
373c726e | 2247 | { }; |
cfa9a96b | 2248 | |
f61a12b3 JW |
2249 | // Let C denote the same type, if any, as common_type_t<T1, T2>. |
2250 | // If there is such a type C, type shall denote the same type, if any, | |
2251 | // as common_type_t<C, R...>. | |
2252 | template<typename _CTp, typename... _Rp> | |
2253 | struct __common_type_fold<_CTp, __common_type_pack<_Rp...>, | |
2254 | __void_t<typename _CTp::type>> | |
2255 | : public common_type<typename _CTp::type, _Rp...> | |
b3618b71 | 2256 | { }; |
cfa9a96b | 2257 | |
f61a12b3 JW |
2258 | // Otherwise, there shall be no member type. |
2259 | template<typename _CTp, typename _Rp> | |
2260 | struct __common_type_fold<_CTp, _Rp, void> | |
b3618b71 | 2261 | { }; |
7274deff | 2262 | |
3c26b759 JW |
2263 | template<typename _Tp, bool = is_enum<_Tp>::value> |
2264 | struct __underlying_type_impl | |
2265 | { | |
2266 | using type = __underlying_type(_Tp); | |
2267 | }; | |
2268 | ||
2269 | template<typename _Tp> | |
2270 | struct __underlying_type_impl<_Tp, false> | |
2271 | { }; | |
2272 | ||
13901e4b | 2273 | /// The underlying type of an enum. |
a47407f6 PC |
2274 | template<typename _Tp> |
2275 | struct underlying_type | |
3c26b759 JW |
2276 | : public __underlying_type_impl<_Tp> |
2277 | { }; | |
123c516a | 2278 | |
7274deff PC |
2279 | template<typename _Tp> |
2280 | struct __declval_protector | |
2281 | { | |
2282 | static const bool __stop = false; | |
7274deff PC |
2283 | }; |
2284 | ||
2285 | template<typename _Tp> | |
ec26ff5a | 2286 | auto declval() noexcept -> decltype(__declval<_Tp>(0)) |
7274deff PC |
2287 | { |
2288 | static_assert(__declval_protector<_Tp>::__stop, | |
2289 | "declval() must not be used!"); | |
ec26ff5a | 2290 | return __declval<_Tp>(0); |
7274deff | 2291 | } |
1041daba | 2292 | |
6791489e JW |
2293 | // __remove_cvref_t (std::remove_cvref_t for C++11). |
2294 | template<typename _Tp> | |
2295 | using __remove_cvref_t | |
2296 | = typename remove_cv<typename remove_reference<_Tp>::type>::type; | |
2297 | ||
be7f7822 JW |
2298 | /// result_of |
2299 | template<typename _Signature> | |
2300 | class result_of; | |
2301 | ||
c0ffa2ba | 2302 | // Sfinae-friendly result_of implementation: |
83ddb39f | 2303 | |
a15f7cb8 ESR |
2304 | #define __cpp_lib_result_of_sfinae 201210 |
2305 | ||
93e95400 JW |
2306 | struct __invoke_memfun_ref { }; |
2307 | struct __invoke_memfun_deref { }; | |
2308 | struct __invoke_memobj_ref { }; | |
2309 | struct __invoke_memobj_deref { }; | |
2310 | struct __invoke_other { }; | |
2311 | ||
2312 | // Associate a tag type with a specialization of __success_type. | |
2313 | template<typename _Tp, typename _Tag> | |
2314 | struct __result_of_success : __success_type<_Tp> | |
2315 | { using __invoke_type = _Tag; }; | |
2316 | ||
83ddb39f DK |
2317 | // [func.require] paragraph 1 bullet 1: |
2318 | struct __result_of_memfun_ref_impl | |
2319 | { | |
2320 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2321 | static __result_of_success<decltype( |
83ddb39f | 2322 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2323 | ), __invoke_memfun_ref> _S_test(int); |
83ddb39f DK |
2324 | |
2325 | template<typename...> | |
2326 | static __failure_type _S_test(...); | |
2327 | }; | |
2328 | ||
2329 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2330 | struct __result_of_memfun_ref | |
2331 | : private __result_of_memfun_ref_impl | |
2332 | { | |
2333 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2334 | }; | |
2335 | ||
2336 | // [func.require] paragraph 1 bullet 2: | |
2337 | struct __result_of_memfun_deref_impl | |
2338 | { | |
2339 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2340 | static __result_of_success<decltype( |
83ddb39f | 2341 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2342 | ), __invoke_memfun_deref> _S_test(int); |
83ddb39f DK |
2343 | |
2344 | template<typename...> | |
2345 | static __failure_type _S_test(...); | |
2346 | }; | |
2347 | ||
2348 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2349 | struct __result_of_memfun_deref | |
2350 | : private __result_of_memfun_deref_impl | |
2351 | { | |
2352 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2353 | }; | |
2354 | ||
2355 | // [func.require] paragraph 1 bullet 3: | |
2356 | struct __result_of_memobj_ref_impl | |
2357 | { | |
2358 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2359 | static __result_of_success<decltype( |
83ddb39f | 2360 | std::declval<_Tp1>().*std::declval<_Fp>() |
93e95400 | 2361 | ), __invoke_memobj_ref> _S_test(int); |
83ddb39f DK |
2362 | |
2363 | template<typename, typename> | |
2364 | static __failure_type _S_test(...); | |
2365 | }; | |
2366 | ||
2367 | template<typename _MemPtr, typename _Arg> | |
2368 | struct __result_of_memobj_ref | |
2369 | : private __result_of_memobj_ref_impl | |
2370 | { | |
2371 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2372 | }; | |
2373 | ||
2374 | // [func.require] paragraph 1 bullet 4: | |
2375 | struct __result_of_memobj_deref_impl | |
2376 | { | |
2377 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2378 | static __result_of_success<decltype( |
83ddb39f | 2379 | (*std::declval<_Tp1>()).*std::declval<_Fp>() |
93e95400 | 2380 | ), __invoke_memobj_deref> _S_test(int); |
83ddb39f DK |
2381 | |
2382 | template<typename, typename> | |
2383 | static __failure_type _S_test(...); | |
2384 | }; | |
2385 | ||
be7f7822 | 2386 | template<typename _MemPtr, typename _Arg> |
83ddb39f DK |
2387 | struct __result_of_memobj_deref |
2388 | : private __result_of_memobj_deref_impl | |
2389 | { | |
2390 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2391 | }; | |
2392 | ||
2393 | template<typename _MemPtr, typename _Arg> | |
2394 | struct __result_of_memobj; | |
be7f7822 JW |
2395 | |
2396 | template<typename _Res, typename _Class, typename _Arg> | |
83ddb39f | 2397 | struct __result_of_memobj<_Res _Class::*, _Arg> |
be7f7822 | 2398 | { |
6791489e | 2399 | typedef __remove_cvref_t<_Arg> _Argval; |
83ddb39f DK |
2400 | typedef _Res _Class::* _MemPtr; |
2401 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2402 | is_base_of<_Class, _Argval>>::value, | |
2403 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2404 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2405 | >::type::type type; | |
be7f7822 JW |
2406 | }; |
2407 | ||
83ddb39f DK |
2408 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2409 | struct __result_of_memfun; | |
be7f7822 JW |
2410 | |
2411 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
83ddb39f | 2412 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
be7f7822 | 2413 | { |
81c7cf71 | 2414 | typedef typename remove_reference<_Arg>::type _Argval; |
83ddb39f | 2415 | typedef _Res _Class::* _MemPtr; |
81c7cf71 | 2416 | typedef typename conditional<is_base_of<_Class, _Argval>::value, |
83ddb39f DK |
2417 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, |
2418 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2419 | >::type::type type; | |
be7f7822 JW |
2420 | }; |
2421 | ||
93e95400 JW |
2422 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2423 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper | |
2424 | // as the object expression | |
93e95400 | 2425 | |
7dcc645c | 2426 | // Used by result_of, invoke etc. to unwrap a reference_wrapper. |
81c7cf71 | 2427 | template<typename _Tp, typename _Up = __remove_cvref_t<_Tp>> |
7dcc645c JW |
2428 | struct __inv_unwrap |
2429 | { | |
2430 | using type = _Tp; | |
2431 | }; | |
f3d7dd52 | 2432 | |
7dcc645c JW |
2433 | template<typename _Tp, typename _Up> |
2434 | struct __inv_unwrap<_Tp, reference_wrapper<_Up>> | |
2435 | { | |
2436 | using type = _Up&; | |
2437 | }; | |
93e95400 | 2438 | |
be7f7822 | 2439 | template<bool, bool, typename _Functor, typename... _ArgTypes> |
83ddb39f | 2440 | struct __result_of_impl |
be7f7822 | 2441 | { |
83ddb39f | 2442 | typedef __failure_type type; |
be7f7822 JW |
2443 | }; |
2444 | ||
2445 | template<typename _MemPtr, typename _Arg> | |
83ddb39f | 2446 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
7dcc645c JW |
2447 | : public __result_of_memobj<typename decay<_MemPtr>::type, |
2448 | typename __inv_unwrap<_Arg>::type> | |
c4db9a77 | 2449 | { }; |
be7f7822 | 2450 | |
83ddb39f DK |
2451 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2452 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
7dcc645c JW |
2453 | : public __result_of_memfun<typename decay<_MemPtr>::type, |
2454 | typename __inv_unwrap<_Arg>::type, _Args...> | |
c4db9a77 | 2455 | { }; |
be7f7822 | 2456 | |
83ddb39f DK |
2457 | // [func.require] paragraph 1 bullet 5: |
2458 | struct __result_of_other_impl | |
2459 | { | |
2460 | template<typename _Fn, typename... _Args> | |
93e95400 | 2461 | static __result_of_success<decltype( |
83ddb39f | 2462 | std::declval<_Fn>()(std::declval<_Args>()...) |
93e95400 | 2463 | ), __invoke_other> _S_test(int); |
83ddb39f DK |
2464 | |
2465 | template<typename...> | |
2466 | static __failure_type _S_test(...); | |
2467 | }; | |
2468 | ||
be7f7822 | 2469 | template<typename _Functor, typename... _ArgTypes> |
83ddb39f DK |
2470 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2471 | : private __result_of_other_impl | |
be7f7822 | 2472 | { |
83ddb39f | 2473 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
be7f7822 JW |
2474 | }; |
2475 | ||
7dcc645c | 2476 | // __invoke_result (std::invoke_result for C++11) |
83ddb39f | 2477 | template<typename _Functor, typename... _ArgTypes> |
7dcc645c | 2478 | struct __invoke_result |
83ddb39f DK |
2479 | : public __result_of_impl< |
2480 | is_member_object_pointer< | |
2481 | typename remove_reference<_Functor>::type | |
2482 | >::value, | |
2483 | is_member_function_pointer< | |
2484 | typename remove_reference<_Functor>::type | |
2485 | >::value, | |
7dcc645c | 2486 | _Functor, _ArgTypes... |
83ddb39f DK |
2487 | >::type |
2488 | { }; | |
c0ffa2ba | 2489 | |
7dcc645c JW |
2490 | template<typename _Functor, typename... _ArgTypes> |
2491 | struct result_of<_Functor(_ArgTypes...)> | |
2492 | : public __invoke_result<_Functor, _ArgTypes...> | |
2493 | { }; | |
2494 | ||
e112d53a | 2495 | #if __cplusplus >= 201402L |
4457e88c JW |
2496 | /// Alias template for aligned_storage |
2497 | template<size_t _Len, size_t _Align = | |
2498 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2499 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2500 | ||
d3718027 RS |
2501 | template <size_t _Len, typename... _Types> |
2502 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2503 | ||
4457e88c JW |
2504 | /// Alias template for decay |
2505 | template<typename _Tp> | |
2506 | using decay_t = typename decay<_Tp>::type; | |
2507 | ||
2508 | /// Alias template for enable_if | |
2509 | template<bool _Cond, typename _Tp = void> | |
2510 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2511 | ||
2512 | /// Alias template for conditional | |
2513 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2514 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2515 | ||
2516 | /// Alias template for common_type | |
2517 | template<typename... _Tp> | |
2518 | using common_type_t = typename common_type<_Tp...>::type; | |
2519 | ||
2520 | /// Alias template for underlying_type | |
2521 | template<typename _Tp> | |
2522 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2523 | ||
2524 | /// Alias template for result_of | |
2525 | template<typename _Tp> | |
2526 | using result_of_t = typename result_of<_Tp>::type; | |
e112d53a JW |
2527 | #endif // C++14 |
2528 | ||
2529 | // __enable_if_t (std::enable_if_t for C++11) | |
2530 | template<bool _Cond, typename _Tp = void> | |
2531 | using __enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
4457e88c | 2532 | |
e112d53a | 2533 | #if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11 |
bd1eb5e0 JW |
2534 | #define __cpp_lib_void_t 201411 |
2535 | /// A metafunction that always yields void, used for detecting valid types. | |
2536 | template<typename...> using void_t = void; | |
2537 | #endif | |
2538 | ||
6af6bef4 JW |
2539 | /// Implementation of the detection idiom (negative case). |
2540 | template<typename _Default, typename _AlwaysVoid, | |
2541 | template<typename...> class _Op, typename... _Args> | |
2542 | struct __detector | |
2543 | { | |
2544 | using value_t = false_type; | |
2545 | using type = _Default; | |
2546 | }; | |
2547 | ||
2548 | /// Implementation of the detection idiom (positive case). | |
2549 | template<typename _Default, template<typename...> class _Op, | |
2550 | typename... _Args> | |
2551 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2552 | { | |
2553 | using value_t = true_type; | |
2554 | using type = _Op<_Args...>; | |
2555 | }; | |
2556 | ||
2557 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2558 | template<typename _Default, template<typename...> class _Op, | |
2559 | typename... _Args> | |
2560 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2561 | ||
2562 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2563 | template<typename _Default, template<typename...> class _Op, | |
2564 | typename... _Args> | |
2565 | using __detected_or_t | |
2566 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2567 | ||
c0ffa2ba | 2568 | /// @} group metaprogramming |
847e9cf8 | 2569 | |
033b71ce PC |
2570 | /** |
2571 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2572 | * member type _NTYPE. | |
2573 | */ | |
82b12c4b | 2574 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
847e9cf8 | 2575 | template<typename _Tp, typename = __void_t<>> \ |
82b12c4b | 2576 | struct __has_##_NTYPE \ |
847e9cf8 JW |
2577 | : false_type \ |
2578 | { }; \ | |
2579 | template<typename _Tp> \ | |
2580 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2581 | : true_type \ | |
033b71ce PC |
2582 | { }; |
2583 | ||
26b5ace7 DK |
2584 | template <typename _Tp> |
2585 | struct __is_swappable; | |
ddb63209 | 2586 | |
26b5ace7 DK |
2587 | template <typename _Tp> |
2588 | struct __is_nothrow_swappable; | |
ddb63209 | 2589 | |
a2863bde VV |
2590 | template<typename... _Elements> |
2591 | class tuple; | |
2592 | ||
2593 | template<typename> | |
2594 | struct __is_tuple_like_impl : false_type | |
2595 | { }; | |
2596 | ||
2597 | template<typename... _Tps> | |
2598 | struct __is_tuple_like_impl<tuple<_Tps...>> : true_type | |
2599 | { }; | |
2600 | ||
2601 | // Internal type trait that allows us to sfinae-protect tuple_cat. | |
2602 | template<typename _Tp> | |
2603 | struct __is_tuple_like | |
6791489e | 2604 | : public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type |
a2863bde VV |
2605 | { }; |
2606 | ||
ddb63209 | 2607 | template<typename _Tp> |
7a91c710 | 2608 | _GLIBCXX20_CONSTEXPR |
ddb63209 | 2609 | inline |
a2863bde VV |
2610 | typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>, |
2611 | is_move_constructible<_Tp>, | |
ddb63209 VV |
2612 | is_move_assignable<_Tp>>::value>::type |
2613 | swap(_Tp&, _Tp&) | |
2614 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2615 | is_nothrow_move_assignable<_Tp>>::value); | |
2616 | ||
2617 | template<typename _Tp, size_t _Nm> | |
7a91c710 | 2618 | _GLIBCXX20_CONSTEXPR |
ddb63209 | 2619 | inline |
26b5ace7 | 2620 | typename enable_if<__is_swappable<_Tp>::value>::type |
ddb63209 | 2621 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) |
26b5ace7 | 2622 | noexcept(__is_nothrow_swappable<_Tp>::value); |
ddb63209 | 2623 | |
26b5ace7 | 2624 | namespace __swappable_details { |
ddb63209 VV |
2625 | using std::swap; |
2626 | ||
26b5ace7 DK |
2627 | struct __do_is_swappable_impl |
2628 | { | |
2629 | template<typename _Tp, typename | |
2630 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> | |
2631 | static true_type __test(int); | |
2632 | ||
2633 | template<typename> | |
2634 | static false_type __test(...); | |
2635 | }; | |
2636 | ||
2637 | struct __do_is_nothrow_swappable_impl | |
2638 | { | |
2639 | template<typename _Tp> | |
2640 | static __bool_constant< | |
2641 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) | |
2642 | > __test(int); | |
2643 | ||
2644 | template<typename> | |
2645 | static false_type __test(...); | |
2646 | }; | |
2647 | ||
6b9539e2 | 2648 | } // namespace __swappable_details |
ddb63209 | 2649 | |
26b5ace7 DK |
2650 | template<typename _Tp> |
2651 | struct __is_swappable_impl | |
2652 | : public __swappable_details::__do_is_swappable_impl | |
2653 | { | |
2654 | typedef decltype(__test<_Tp>(0)) type; | |
2655 | }; | |
2656 | ||
2657 | template<typename _Tp> | |
ddb63209 | 2658 | struct __is_nothrow_swappable_impl |
26b5ace7 DK |
2659 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2660 | { | |
2661 | typedef decltype(__test<_Tp>(0)) type; | |
2662 | }; | |
ddb63209 | 2663 | |
26b5ace7 DK |
2664 | template<typename _Tp> |
2665 | struct __is_swappable | |
2666 | : public __is_swappable_impl<_Tp>::type | |
ddb63209 VV |
2667 | { }; |
2668 | ||
26b5ace7 | 2669 | template<typename _Tp> |
ddb63209 | 2670 | struct __is_nothrow_swappable |
26b5ace7 | 2671 | : public __is_nothrow_swappable_impl<_Tp>::type |
ddb63209 VV |
2672 | { }; |
2673 | ||
6b9539e2 DK |
2674 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2675 | #define __cpp_lib_is_swappable 201603 | |
2676 | /// Metafunctions used for detecting swappable types: p0185r1 | |
2677 | ||
2678 | /// is_swappable | |
2679 | template<typename _Tp> | |
2680 | struct is_swappable | |
2681 | : public __is_swappable_impl<_Tp>::type | |
608a080c AP |
2682 | { |
2683 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2684 | "template argument must be a complete class or an unbounded array"); | |
2685 | }; | |
6b9539e2 DK |
2686 | |
2687 | /// is_nothrow_swappable | |
2688 | template<typename _Tp> | |
2689 | struct is_nothrow_swappable | |
2690 | : public __is_nothrow_swappable_impl<_Tp>::type | |
608a080c AP |
2691 | { |
2692 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2693 | "template argument must be a complete class or an unbounded array"); | |
2694 | }; | |
6b9539e2 DK |
2695 | |
2696 | #if __cplusplus >= 201402L | |
2697 | /// is_swappable_v | |
2698 | template<typename _Tp> | |
288695f7 DK |
2699 | _GLIBCXX17_INLINE constexpr bool is_swappable_v = |
2700 | is_swappable<_Tp>::value; | |
6b9539e2 DK |
2701 | |
2702 | /// is_nothrow_swappable_v | |
2703 | template<typename _Tp> | |
288695f7 DK |
2704 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v = |
2705 | is_nothrow_swappable<_Tp>::value; | |
6b9539e2 DK |
2706 | #endif // __cplusplus >= 201402L |
2707 | ||
2708 | namespace __swappable_with_details { | |
2709 | using std::swap; | |
2710 | ||
2711 | struct __do_is_swappable_with_impl | |
2712 | { | |
2713 | template<typename _Tp, typename _Up, typename | |
2714 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), | |
2715 | typename | |
2716 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> | |
2717 | static true_type __test(int); | |
2718 | ||
2719 | template<typename, typename> | |
2720 | static false_type __test(...); | |
2721 | }; | |
2722 | ||
2723 | struct __do_is_nothrow_swappable_with_impl | |
2724 | { | |
2725 | template<typename _Tp, typename _Up> | |
2726 | static __bool_constant< | |
2727 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) | |
2728 | && | |
2729 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) | |
2730 | > __test(int); | |
2731 | ||
2732 | template<typename, typename> | |
2733 | static false_type __test(...); | |
2734 | }; | |
2735 | ||
2736 | } // namespace __swappable_with_details | |
2737 | ||
2738 | template<typename _Tp, typename _Up> | |
2739 | struct __is_swappable_with_impl | |
2740 | : public __swappable_with_details::__do_is_swappable_with_impl | |
2741 | { | |
2742 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2743 | }; | |
2744 | ||
2745 | // Optimization for the homogenous lvalue case, not required: | |
2746 | template<typename _Tp> | |
2747 | struct __is_swappable_with_impl<_Tp&, _Tp&> | |
2748 | : public __swappable_details::__do_is_swappable_impl | |
2749 | { | |
2750 | typedef decltype(__test<_Tp&>(0)) type; | |
2751 | }; | |
2752 | ||
2753 | template<typename _Tp, typename _Up> | |
2754 | struct __is_nothrow_swappable_with_impl | |
2755 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl | |
2756 | { | |
2757 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2758 | }; | |
2759 | ||
2760 | // Optimization for the homogenous lvalue case, not required: | |
2761 | template<typename _Tp> | |
2762 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> | |
2763 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2764 | { | |
2765 | typedef decltype(__test<_Tp&>(0)) type; | |
2766 | }; | |
2767 | ||
2768 | /// is_swappable_with | |
2769 | template<typename _Tp, typename _Up> | |
2770 | struct is_swappable_with | |
2771 | : public __is_swappable_with_impl<_Tp, _Up>::type | |
2772 | { }; | |
2773 | ||
2774 | /// is_nothrow_swappable_with | |
2775 | template<typename _Tp, typename _Up> | |
2776 | struct is_nothrow_swappable_with | |
2777 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type | |
2778 | { }; | |
2779 | ||
2780 | #if __cplusplus >= 201402L | |
2781 | /// is_swappable_with_v | |
2782 | template<typename _Tp, typename _Up> | |
288695f7 DK |
2783 | _GLIBCXX17_INLINE constexpr bool is_swappable_with_v = |
2784 | is_swappable_with<_Tp, _Up>::value; | |
6b9539e2 DK |
2785 | |
2786 | /// is_nothrow_swappable_with_v | |
2787 | template<typename _Tp, typename _Up> | |
288695f7 | 2788 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v = |
6b9539e2 DK |
2789 | is_nothrow_swappable_with<_Tp, _Up>::value; |
2790 | #endif // __cplusplus >= 201402L | |
137422c8 | 2791 | |
42183d03 JW |
2792 | #endif// c++1z or gnu++11 |
2793 | ||
7dcc645c | 2794 | // __is_invocable (std::is_invocable for C++11) |
42183d03 | 2795 | |
d91f618d JW |
2796 | // The primary template is used for invalid INVOKE expressions. |
2797 | template<typename _Result, typename _Ret, | |
2798 | bool = is_void<_Ret>::value, typename = void> | |
7dcc645c | 2799 | struct __is_invocable_impl : false_type { }; |
42183d03 | 2800 | |
d91f618d | 2801 | // Used for valid INVOKE and INVOKE<void> expressions. |
42183d03 | 2802 | template<typename _Result, typename _Ret> |
d91f618d JW |
2803 | struct __is_invocable_impl<_Result, _Ret, |
2804 | /* is_void<_Ret> = */ true, | |
2805 | __void_t<typename _Result::type>> | |
2806 | : true_type | |
42183d03 JW |
2807 | { }; |
2808 | ||
d91f618d JW |
2809 | #pragma GCC diagnostic push |
2810 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
2811 | // Used for INVOKE<R> expressions to check the implicit conversion to R. | |
2812 | template<typename _Result, typename _Ret> | |
2813 | struct __is_invocable_impl<_Result, _Ret, | |
2814 | /* is_void<_Ret> = */ false, | |
2815 | __void_t<typename _Result::type>> | |
2816 | { | |
2817 | private: | |
2818 | // The type of the INVOKE expression. | |
2819 | // Unlike declval, this doesn't add_rvalue_reference. | |
2820 | static typename _Result::type _S_get(); | |
2821 | ||
2822 | template<typename _Tp> | |
2823 | static void _S_conv(_Tp); | |
2824 | ||
2825 | // This overload is viable if INVOKE(f, args...) can convert to _Tp. | |
2826 | template<typename _Tp, typename = decltype(_S_conv<_Tp>(_S_get()))> | |
2827 | static true_type | |
2828 | _S_test(int); | |
2829 | ||
2830 | template<typename _Tp> | |
2831 | static false_type | |
2832 | _S_test(...); | |
2833 | ||
2834 | public: | |
2835 | using type = decltype(_S_test<_Ret>(1)); | |
2836 | }; | |
2837 | #pragma GCC diagnostic pop | |
2838 | ||
7dcc645c JW |
2839 | template<typename _Fn, typename... _ArgTypes> |
2840 | struct __is_invocable | |
2841 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
42183d03 JW |
2842 | { }; |
2843 | ||
42183d03 JW |
2844 | template<typename _Fn, typename _Tp, typename... _Args> |
2845 | constexpr bool __call_is_nt(__invoke_memfun_ref) | |
2846 | { | |
2847 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2848 | return noexcept((std::declval<_Up>().*std::declval<_Fn>())( | |
2849 | std::declval<_Args>()...)); | |
2850 | } | |
2851 | ||
2852 | template<typename _Fn, typename _Tp, typename... _Args> | |
2853 | constexpr bool __call_is_nt(__invoke_memfun_deref) | |
2854 | { | |
2855 | return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())( | |
2856 | std::declval<_Args>()...)); | |
2857 | } | |
2858 | ||
2859 | template<typename _Fn, typename _Tp> | |
2860 | constexpr bool __call_is_nt(__invoke_memobj_ref) | |
2861 | { | |
2862 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2863 | return noexcept(std::declval<_Up>().*std::declval<_Fn>()); | |
2864 | } | |
2865 | ||
2866 | template<typename _Fn, typename _Tp> | |
2867 | constexpr bool __call_is_nt(__invoke_memobj_deref) | |
2868 | { | |
2869 | return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>()); | |
2870 | } | |
2871 | ||
2872 | template<typename _Fn, typename... _Args> | |
2873 | constexpr bool __call_is_nt(__invoke_other) | |
2874 | { | |
2875 | return noexcept(std::declval<_Fn>()(std::declval<_Args>()...)); | |
2876 | } | |
2877 | ||
7dcc645c | 2878 | template<typename _Result, typename _Fn, typename... _Args> |
42183d03 JW |
2879 | struct __call_is_nothrow |
2880 | : __bool_constant< | |
7dcc645c JW |
2881 | std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{}) |
2882 | > | |
42183d03 JW |
2883 | { }; |
2884 | ||
7dcc645c JW |
2885 | template<typename _Fn, typename... _Args> |
2886 | using __call_is_nothrow_ | |
2887 | = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>; | |
42183d03 | 2888 | |
7dcc645c JW |
2889 | // __is_nothrow_invocable (std::is_nothrow_invocable for C++11) |
2890 | template<typename _Fn, typename... _Args> | |
2891 | struct __is_nothrow_invocable | |
2892 | : __and_<__is_invocable<_Fn, _Args...>, | |
2893 | __call_is_nothrow_<_Fn, _Args...>>::type | |
42183d03 JW |
2894 | { }; |
2895 | ||
cc28d234 JW |
2896 | #pragma GCC diagnostic push |
2897 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
a73d2fa8 NDR |
2898 | struct __nonesuchbase {}; |
2899 | struct __nonesuch : private __nonesuchbase { | |
f524d5b3 VV |
2900 | ~__nonesuch() = delete; |
2901 | __nonesuch(__nonesuch const&) = delete; | |
2902 | void operator=(__nonesuch const&) = delete; | |
2903 | }; | |
cc28d234 | 2904 | #pragma GCC diagnostic pop |
f524d5b3 | 2905 | |
e641ee43 | 2906 | #if __cplusplus >= 201703L |
7dcc645c JW |
2907 | # define __cpp_lib_is_invocable 201703 |
2908 | ||
2909 | /// std::invoke_result | |
2910 | template<typename _Functor, typename... _ArgTypes> | |
2911 | struct invoke_result | |
2912 | : public __invoke_result<_Functor, _ArgTypes...> | |
2913 | { }; | |
2914 | ||
2915 | /// std::invoke_result_t | |
2916 | template<typename _Fn, typename... _Args> | |
2917 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; | |
42183d03 | 2918 | |
7dcc645c JW |
2919 | /// std::is_invocable |
2920 | template<typename _Fn, typename... _ArgTypes> | |
2921 | struct is_invocable | |
2922 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
608a080c AP |
2923 | { |
2924 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
2925 | "_Fn must be a complete class or an unbounded array"); | |
2926 | }; | |
42183d03 | 2927 | |
7dcc645c JW |
2928 | /// std::is_invocable_r |
2929 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
2930 | struct is_invocable_r | |
2931 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type | |
608a080c AP |
2932 | { |
2933 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
2934 | "_Fn must be a complete class or an unbounded array"); | |
2935 | }; | |
42183d03 | 2936 | |
7dcc645c JW |
2937 | /// std::is_nothrow_invocable |
2938 | template<typename _Fn, typename... _ArgTypes> | |
2939 | struct is_nothrow_invocable | |
2940 | : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>, | |
608a080c AP |
2941 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
2942 | { | |
2943 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
2944 | "_Fn must be a complete class or an unbounded array"); | |
2945 | }; | |
42183d03 | 2946 | |
c4b06e7f JW |
2947 | template<typename _Result, typename _Ret, typename = void> |
2948 | struct __is_nt_invocable_impl : false_type { }; | |
2949 | ||
2950 | template<typename _Result, typename _Ret> | |
2951 | struct __is_nt_invocable_impl<_Result, _Ret, | |
2952 | __void_t<typename _Result::type>> | |
91d01b33 | 2953 | : __or_<is_void<_Ret>, |
ce9f305e | 2954 | __is_nothrow_convertible<typename _Result::type, _Ret>> |
c4b06e7f JW |
2955 | { }; |
2956 | ||
7dcc645c JW |
2957 | /// std::is_nothrow_invocable_r |
2958 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
2959 | struct is_nothrow_invocable_r | |
c4b06e7f | 2960 | : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>, |
7dcc645c | 2961 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
42183d03 JW |
2962 | { }; |
2963 | ||
7dcc645c JW |
2964 | /// std::is_invocable_v |
2965 | template<typename _Fn, typename... _Args> | |
2966 | inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value; | |
42183d03 | 2967 | |
7dcc645c JW |
2968 | /// std::is_nothrow_invocable_v |
2969 | template<typename _Fn, typename... _Args> | |
2970 | inline constexpr bool is_nothrow_invocable_v | |
2971 | = is_nothrow_invocable<_Fn, _Args...>::value; | |
42183d03 | 2972 | |
7dcc645c | 2973 | /// std::is_invocable_r_v |
ce9f305e | 2974 | template<typename _Ret, typename _Fn, typename... _Args> |
7dcc645c | 2975 | inline constexpr bool is_invocable_r_v |
ce9f305e | 2976 | = is_invocable_r<_Ret, _Fn, _Args...>::value; |
7dcc645c JW |
2977 | |
2978 | /// std::is_nothrow_invocable_r_v | |
ce9f305e | 2979 | template<typename _Ret, typename _Fn, typename... _Args> |
7dcc645c | 2980 | inline constexpr bool is_nothrow_invocable_r_v |
ce9f305e | 2981 | = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; |
7dcc645c | 2982 | #endif // C++17 |
42183d03 | 2983 | |
e641ee43 | 2984 | #if __cplusplus >= 201703L |
068c8ac1 | 2985 | # define __cpp_lib_type_trait_variable_templates 201510L |
137422c8 | 2986 | template <typename _Tp> |
288695f7 | 2987 | inline constexpr bool is_void_v = is_void<_Tp>::value; |
137422c8 | 2988 | template <typename _Tp> |
288695f7 | 2989 | inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; |
137422c8 | 2990 | template <typename _Tp> |
288695f7 | 2991 | inline constexpr bool is_integral_v = is_integral<_Tp>::value; |
137422c8 | 2992 | template <typename _Tp> |
288695f7 | 2993 | inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; |
137422c8 | 2994 | template <typename _Tp> |
288695f7 | 2995 | inline constexpr bool is_array_v = is_array<_Tp>::value; |
137422c8 | 2996 | template <typename _Tp> |
288695f7 | 2997 | inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |
137422c8 | 2998 | template <typename _Tp> |
288695f7 DK |
2999 | inline constexpr bool is_lvalue_reference_v = |
3000 | is_lvalue_reference<_Tp>::value; | |
137422c8 | 3001 | template <typename _Tp> |
288695f7 DK |
3002 | inline constexpr bool is_rvalue_reference_v = |
3003 | is_rvalue_reference<_Tp>::value; | |
137422c8 | 3004 | template <typename _Tp> |
288695f7 | 3005 | inline constexpr bool is_member_object_pointer_v = |
137422c8 VV |
3006 | is_member_object_pointer<_Tp>::value; |
3007 | template <typename _Tp> | |
288695f7 | 3008 | inline constexpr bool is_member_function_pointer_v = |
137422c8 VV |
3009 | is_member_function_pointer<_Tp>::value; |
3010 | template <typename _Tp> | |
288695f7 | 3011 | inline constexpr bool is_enum_v = is_enum<_Tp>::value; |
137422c8 | 3012 | template <typename _Tp> |
288695f7 | 3013 | inline constexpr bool is_union_v = is_union<_Tp>::value; |
137422c8 | 3014 | template <typename _Tp> |
288695f7 | 3015 | inline constexpr bool is_class_v = is_class<_Tp>::value; |
137422c8 | 3016 | template <typename _Tp> |
288695f7 | 3017 | inline constexpr bool is_function_v = is_function<_Tp>::value; |
137422c8 | 3018 | template <typename _Tp> |
288695f7 | 3019 | inline constexpr bool is_reference_v = is_reference<_Tp>::value; |
137422c8 | 3020 | template <typename _Tp> |
288695f7 | 3021 | inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; |
137422c8 | 3022 | template <typename _Tp> |
288695f7 | 3023 | inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; |
137422c8 | 3024 | template <typename _Tp> |
288695f7 | 3025 | inline constexpr bool is_object_v = is_object<_Tp>::value; |
137422c8 | 3026 | template <typename _Tp> |
288695f7 | 3027 | inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
137422c8 | 3028 | template <typename _Tp> |
288695f7 | 3029 | inline constexpr bool is_compound_v = is_compound<_Tp>::value; |
137422c8 | 3030 | template <typename _Tp> |
288695f7 | 3031 | inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; |
137422c8 | 3032 | template <typename _Tp> |
288695f7 | 3033 | inline constexpr bool is_const_v = is_const<_Tp>::value; |
137422c8 | 3034 | template <typename _Tp> |
288695f7 | 3035 | inline constexpr bool is_volatile_v = is_volatile<_Tp>::value; |
137422c8 | 3036 | template <typename _Tp> |
288695f7 | 3037 | inline constexpr bool is_trivial_v = is_trivial<_Tp>::value; |
137422c8 | 3038 | template <typename _Tp> |
288695f7 DK |
3039 | inline constexpr bool is_trivially_copyable_v = |
3040 | is_trivially_copyable<_Tp>::value; | |
137422c8 | 3041 | template <typename _Tp> |
288695f7 | 3042 | inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; |
137422c8 | 3043 | template <typename _Tp> |
288695f7 | 3044 | inline constexpr bool is_pod_v = is_pod<_Tp>::value; |
137422c8 | 3045 | template <typename _Tp> |
288695f7 | 3046 | inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; |
137422c8 | 3047 | template <typename _Tp> |
288695f7 | 3048 | inline constexpr bool is_empty_v = is_empty<_Tp>::value; |
137422c8 | 3049 | template <typename _Tp> |
288695f7 | 3050 | inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; |
137422c8 | 3051 | template <typename _Tp> |
288695f7 | 3052 | inline constexpr bool is_abstract_v = is_abstract<_Tp>::value; |
137422c8 | 3053 | template <typename _Tp> |
288695f7 | 3054 | inline constexpr bool is_final_v = is_final<_Tp>::value; |
137422c8 | 3055 | template <typename _Tp> |
288695f7 | 3056 | inline constexpr bool is_signed_v = is_signed<_Tp>::value; |
137422c8 | 3057 | template <typename _Tp> |
288695f7 | 3058 | inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; |
137422c8 | 3059 | template <typename _Tp, typename... _Args> |
288695f7 DK |
3060 | inline constexpr bool is_constructible_v = |
3061 | is_constructible<_Tp, _Args...>::value; | |
137422c8 | 3062 | template <typename _Tp> |
288695f7 | 3063 | inline constexpr bool is_default_constructible_v = |
137422c8 VV |
3064 | is_default_constructible<_Tp>::value; |
3065 | template <typename _Tp> | |
288695f7 DK |
3066 | inline constexpr bool is_copy_constructible_v = |
3067 | is_copy_constructible<_Tp>::value; | |
137422c8 | 3068 | template <typename _Tp> |
288695f7 DK |
3069 | inline constexpr bool is_move_constructible_v = |
3070 | is_move_constructible<_Tp>::value; | |
137422c8 | 3071 | template <typename _Tp, typename _Up> |
288695f7 | 3072 | inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; |
137422c8 | 3073 | template <typename _Tp> |
288695f7 | 3074 | inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; |
137422c8 | 3075 | template <typename _Tp> |
288695f7 | 3076 | inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; |
137422c8 | 3077 | template <typename _Tp> |
288695f7 | 3078 | inline constexpr bool is_destructible_v = is_destructible<_Tp>::value; |
137422c8 | 3079 | template <typename _Tp, typename... _Args> |
288695f7 | 3080 | inline constexpr bool is_trivially_constructible_v = |
137422c8 VV |
3081 | is_trivially_constructible<_Tp, _Args...>::value; |
3082 | template <typename _Tp> | |
288695f7 | 3083 | inline constexpr bool is_trivially_default_constructible_v = |
137422c8 VV |
3084 | is_trivially_default_constructible<_Tp>::value; |
3085 | template <typename _Tp> | |
288695f7 | 3086 | inline constexpr bool is_trivially_copy_constructible_v = |
137422c8 VV |
3087 | is_trivially_copy_constructible<_Tp>::value; |
3088 | template <typename _Tp> | |
288695f7 | 3089 | inline constexpr bool is_trivially_move_constructible_v = |
137422c8 VV |
3090 | is_trivially_move_constructible<_Tp>::value; |
3091 | template <typename _Tp, typename _Up> | |
288695f7 | 3092 | inline constexpr bool is_trivially_assignable_v = |
137422c8 VV |
3093 | is_trivially_assignable<_Tp, _Up>::value; |
3094 | template <typename _Tp> | |
288695f7 | 3095 | inline constexpr bool is_trivially_copy_assignable_v = |
137422c8 VV |
3096 | is_trivially_copy_assignable<_Tp>::value; |
3097 | template <typename _Tp> | |
288695f7 | 3098 | inline constexpr bool is_trivially_move_assignable_v = |
137422c8 VV |
3099 | is_trivially_move_assignable<_Tp>::value; |
3100 | template <typename _Tp> | |
288695f7 | 3101 | inline constexpr bool is_trivially_destructible_v = |
137422c8 VV |
3102 | is_trivially_destructible<_Tp>::value; |
3103 | template <typename _Tp, typename... _Args> | |
288695f7 | 3104 | inline constexpr bool is_nothrow_constructible_v = |
137422c8 VV |
3105 | is_nothrow_constructible<_Tp, _Args...>::value; |
3106 | template <typename _Tp> | |
288695f7 | 3107 | inline constexpr bool is_nothrow_default_constructible_v = |
137422c8 VV |
3108 | is_nothrow_default_constructible<_Tp>::value; |
3109 | template <typename _Tp> | |
288695f7 | 3110 | inline constexpr bool is_nothrow_copy_constructible_v = |
137422c8 VV |
3111 | is_nothrow_copy_constructible<_Tp>::value; |
3112 | template <typename _Tp> | |
288695f7 | 3113 | inline constexpr bool is_nothrow_move_constructible_v = |
137422c8 VV |
3114 | is_nothrow_move_constructible<_Tp>::value; |
3115 | template <typename _Tp, typename _Up> | |
288695f7 | 3116 | inline constexpr bool is_nothrow_assignable_v = |
137422c8 VV |
3117 | is_nothrow_assignable<_Tp, _Up>::value; |
3118 | template <typename _Tp> | |
288695f7 | 3119 | inline constexpr bool is_nothrow_copy_assignable_v = |
137422c8 VV |
3120 | is_nothrow_copy_assignable<_Tp>::value; |
3121 | template <typename _Tp> | |
288695f7 | 3122 | inline constexpr bool is_nothrow_move_assignable_v = |
137422c8 VV |
3123 | is_nothrow_move_assignable<_Tp>::value; |
3124 | template <typename _Tp> | |
288695f7 | 3125 | inline constexpr bool is_nothrow_destructible_v = |
137422c8 VV |
3126 | is_nothrow_destructible<_Tp>::value; |
3127 | template <typename _Tp> | |
288695f7 | 3128 | inline constexpr bool has_virtual_destructor_v = |
137422c8 VV |
3129 | has_virtual_destructor<_Tp>::value; |
3130 | template <typename _Tp> | |
288695f7 | 3131 | inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value; |
137422c8 | 3132 | template <typename _Tp> |
288695f7 | 3133 | inline constexpr size_t rank_v = rank<_Tp>::value; |
137422c8 | 3134 | template <typename _Tp, unsigned _Idx = 0> |
288695f7 | 3135 | inline constexpr size_t extent_v = extent<_Tp, _Idx>::value; |
137422c8 | 3136 | template <typename _Tp, typename _Up> |
288695f7 | 3137 | inline constexpr bool is_same_v = is_same<_Tp, _Up>::value; |
137422c8 | 3138 | template <typename _Base, typename _Derived> |
288695f7 | 3139 | inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; |
137422c8 | 3140 | template <typename _From, typename _To> |
288695f7 | 3141 | inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value; |
873c7d5a | 3142 | |
2d763763 | 3143 | #ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP |
873c7d5a JW |
3144 | # define __cpp_lib_has_unique_object_representations 201606 |
3145 | /// has_unique_object_representations | |
3146 | template<typename _Tp> | |
3147 | struct has_unique_object_representations | |
3148 | : bool_constant<__has_unique_object_representations( | |
3149 | remove_cv_t<remove_all_extents_t<_Tp>> | |
3150 | )> | |
608a080c AP |
3151 | { |
3152 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
3153 | "template argument must be a complete class or an unbounded array"); | |
3154 | }; | |
b0e63d94 JW |
3155 | |
3156 | template<typename _Tp> | |
3157 | inline constexpr bool has_unique_object_representations_v | |
3158 | = has_unique_object_representations<_Tp>::value; | |
1f5700e9 | 3159 | #endif |
e2ac6765 | 3160 | |
afa56c17 | 3161 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE |
ff273400 | 3162 | # define __cpp_lib_is_aggregate 201703 |
e2ac6765 VV |
3163 | /// is_aggregate |
3164 | template<typename _Tp> | |
3165 | struct is_aggregate | |
608a080c | 3166 | : bool_constant<__is_aggregate(remove_cv_t<_Tp>)> |
209ee624 | 3167 | { }; |
e2ac6765 VV |
3168 | |
3169 | /// is_aggregate_v | |
3170 | template<typename _Tp> | |
3171 | inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value; | |
3172 | #endif | |
137422c8 | 3173 | #endif // C++17 |
6b9539e2 | 3174 | |
e641ee43 | 3175 | #if __cplusplus > 201703L |
6791489e JW |
3176 | /// Remove references and cv-qualifiers. |
3177 | template<typename _Tp> | |
3178 | struct remove_cvref | |
3179 | { | |
3180 | using type = __remove_cvref_t<_Tp>; | |
3181 | }; | |
3182 | ||
3183 | template<typename _Tp> | |
3184 | using remove_cvref_t = __remove_cvref_t<_Tp>; | |
3185 | ||
ee896276 JW |
3186 | /// Identity metafunction. |
3187 | template<typename _Tp> | |
3188 | struct type_identity { using type = _Tp; }; | |
3189 | ||
3190 | template<typename _Tp> | |
3191 | using type_identity_t = typename type_identity<_Tp>::type; | |
3192 | ||
3d18dc9d JW |
3193 | /// Unwrap a reference_wrapper |
3194 | template<typename _Tp> | |
3195 | struct unwrap_reference { using type = _Tp; }; | |
3196 | ||
3197 | template<typename _Tp> | |
3198 | struct unwrap_reference<reference_wrapper<_Tp>> { using type = _Tp&; }; | |
3199 | ||
82e8c3da JW |
3200 | template<typename _Tp> |
3201 | using unwrap_reference_t = typename unwrap_reference<_Tp>::type; | |
3202 | ||
3d18dc9d JW |
3203 | /// Decay type and if it's a reference_wrapper, unwrap it |
3204 | template<typename _Tp> | |
82e8c3da | 3205 | struct unwrap_ref_decay { using type = unwrap_reference_t<decay_t<_Tp>>; }; |
3d18dc9d JW |
3206 | |
3207 | template<typename _Tp> | |
3208 | using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type; | |
3209 | ||
46610940 JW |
3210 | #define __cpp_lib_bounded_array_traits 201902L |
3211 | ||
28d85efb JW |
3212 | /// True for a type that is an array of known bound. |
3213 | template<typename _Tp> | |
3214 | struct is_bounded_array | |
3215 | : public __is_array_known_bounds<_Tp> | |
3216 | { }; | |
3217 | ||
3218 | /// True for a type that is an array of unknown bound. | |
3219 | template<typename _Tp> | |
3220 | struct is_unbounded_array | |
3221 | : public __is_array_unknown_bounds<_Tp> | |
3222 | { }; | |
3223 | ||
3224 | template<typename _Tp> | |
3225 | inline constexpr bool is_bounded_array_v | |
3226 | = is_bounded_array<_Tp>::value; | |
3227 | ||
3228 | template<typename _Tp> | |
3229 | inline constexpr bool is_unbounded_array_v | |
3230 | = is_unbounded_array<_Tp>::value; | |
3231 | ||
0d7924f2 | 3232 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED |
134a6f7b | 3233 | |
8aa1550e | 3234 | #define __cpp_lib_is_constant_evaluated 201811L |
134a6f7b | 3235 | |
0d7924f2 JJ |
3236 | constexpr inline bool |
3237 | is_constant_evaluated() noexcept | |
3238 | { return __builtin_is_constant_evaluated(); } | |
3239 | #endif | |
3240 | ||
e641ee43 JW |
3241 | #endif // C++2a |
3242 | ||
12ffa228 | 3243 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 3244 | } // namespace std |
7b50cdef | 3245 | |
734f5023 | 3246 | #endif // C++11 |
57317d2a | 3247 | |
7274deff | 3248 | #endif // _GLIBCXX_TYPE_TRAITS |