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c0ffa2ba | 1 | // C++11 <type_traits> -*- C++ -*- |
af13a7a6 | 2 | |
99dee823 | 3 | // Copyright (C) 2007-2021 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 | ||
6963c3b9 JW |
44 | template<typename _Tp> |
45 | class reference_wrapper; | |
46 | ||
8e32aa11 | 47 | /** |
c0ffa2ba | 48 | * @defgroup metaprogramming Metaprogramming |
13901e4b JW |
49 | * @ingroup utilities |
50 | * | |
51 | * Template utilities for compile-time introspection and modification, | |
52 | * including type classification traits, type property inspection traits | |
53 | * and type transformation traits. | |
54 | * | |
6963c3b9 JW |
55 | * @since C++11 |
56 | * | |
5b9daa7e BK |
57 | * @{ |
58 | */ | |
ac65b7d2 DK |
59 | |
60 | /// integral_constant | |
61 | template<typename _Tp, _Tp __v> | |
62 | struct integral_constant | |
63 | { | |
64 | static constexpr _Tp value = __v; | |
65 | typedef _Tp value_type; | |
66 | typedef integral_constant<_Tp, __v> type; | |
352111c5 | 67 | constexpr operator value_type() const noexcept { return value; } |
db113eda | 68 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
69 | |
70 | #define __cpp_lib_integral_constant_callable 201304 | |
71 | ||
352111c5 | 72 | constexpr value_type operator()() const noexcept { return value; } |
db113eda | 73 | #endif |
ac65b7d2 | 74 | }; |
33ac58d5 | 75 | |
a77a46d9 | 76 | #if ! __cpp_inline_variables |
c0ffa2ba BK |
77 | template<typename _Tp, _Tp __v> |
78 | constexpr _Tp integral_constant<_Tp, __v>::value; | |
a77a46d9 | 79 | #endif |
c0ffa2ba | 80 | |
13901e4b | 81 | /// The type used as a compile-time boolean with true value. |
6963c3b9 | 82 | using true_type = integral_constant<bool, true>; |
ac65b7d2 | 83 | |
13901e4b | 84 | /// The type used as a compile-time boolean with false value. |
6963c3b9 | 85 | using false_type = integral_constant<bool, false>; |
ac65b7d2 | 86 | |
6963c3b9 JW |
87 | /// @cond undocumented |
88 | /// bool_constant for C++11 | |
f6b640be JW |
89 | template<bool __v> |
90 | using __bool_constant = integral_constant<bool, __v>; | |
6963c3b9 | 91 | /// @endcond |
f6b640be | 92 | |
6963c3b9 | 93 | #if __cplusplus >= 201703L |
f9badf71 | 94 | # define __cpp_lib_bool_constant 201505 |
6963c3b9 JW |
95 | /// Alias template for compile-time boolean constant types. |
96 | /// @since C++17 | |
46ba1281 JW |
97 | template<bool __v> |
98 | using bool_constant = integral_constant<bool, __v>; | |
99 | #endif | |
100 | ||
6963c3b9 | 101 | // Metaprogramming helper types. |
53dc5044 | 102 | |
123c516a PC |
103 | template<bool, typename, typename> |
104 | struct conditional; | |
53dc5044 | 105 | |
6963c3b9 | 106 | /// @cond undocumented |
608a080c | 107 | template <typename _Type> |
0d67cd38 JW |
108 | struct __type_identity |
109 | { using type = _Type; }; | |
110 | ||
111 | template<typename _Tp> | |
112 | using __type_identity_t = typename __type_identity<_Tp>::type; | |
608a080c | 113 | |
dd7b175e | 114 | template<typename...> |
123c516a PC |
115 | struct __or_; |
116 | ||
ac65b7d2 DK |
117 | template<> |
118 | struct __or_<> | |
119 | : public false_type | |
120 | { }; | |
121 | ||
dd7b175e PC |
122 | template<typename _B1> |
123 | struct __or_<_B1> | |
124 | : public _B1 | |
125 | { }; | |
126 | ||
123c516a PC |
127 | template<typename _B1, typename _B2> |
128 | struct __or_<_B1, _B2> | |
129 | : public conditional<_B1::value, _B1, _B2>::type | |
130 | { }; | |
131 | ||
132 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
133 | struct __or_<_B1, _B2, _B3, _Bn...> | |
134 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
135 | { }; | |
53dc5044 | 136 | |
dd7b175e | 137 | template<typename...> |
123c516a | 138 | struct __and_; |
53dc5044 | 139 | |
ac65b7d2 DK |
140 | template<> |
141 | struct __and_<> | |
142 | : public true_type | |
143 | { }; | |
144 | ||
dd7b175e PC |
145 | template<typename _B1> |
146 | struct __and_<_B1> | |
147 | : public _B1 | |
148 | { }; | |
149 | ||
123c516a PC |
150 | template<typename _B1, typename _B2> |
151 | struct __and_<_B1, _B2> | |
152 | : public conditional<_B1::value, _B2, _B1>::type | |
153 | { }; | |
154 | ||
155 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
156 | struct __and_<_B1, _B2, _B3, _Bn...> | |
157 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
158 | { }; | |
159 | ||
160 | template<typename _Pp> | |
161 | struct __not_ | |
4b9840f2 | 162 | : public __bool_constant<!bool(_Pp::value)> |
123c516a | 163 | { }; |
6963c3b9 | 164 | /// @endcond |
123c516a | 165 | |
4b9840f2 | 166 | #if __cplusplus >= 201703L |
c3a6648b | 167 | |
6963c3b9 | 168 | /// @cond undocumented |
b655b8fc JW |
169 | template<typename... _Bn> |
170 | inline constexpr bool __or_v = __or_<_Bn...>::value; | |
171 | template<typename... _Bn> | |
172 | inline constexpr bool __and_v = __and_<_Bn...>::value; | |
6963c3b9 | 173 | /// @endcond |
b655b8fc | 174 | |
068c8ac1 | 175 | #define __cpp_lib_logical_traits 201510 |
c3a6648b VV |
176 | |
177 | template<typename... _Bn> | |
178 | struct conjunction | |
179 | : __and_<_Bn...> | |
180 | { }; | |
181 | ||
182 | template<typename... _Bn> | |
183 | struct disjunction | |
184 | : __or_<_Bn...> | |
185 | { }; | |
186 | ||
187 | template<typename _Pp> | |
188 | struct negation | |
189 | : __not_<_Pp> | |
190 | { }; | |
137422c8 | 191 | |
6963c3b9 JW |
192 | /** @ingroup variable_templates |
193 | * @{ | |
194 | */ | |
137422c8 | 195 | template<typename... _Bn> |
4b9840f2 | 196 | inline constexpr bool conjunction_v = conjunction<_Bn...>::value; |
42183d03 | 197 | |
137422c8 | 198 | template<typename... _Bn> |
4b9840f2 | 199 | inline constexpr bool disjunction_v = disjunction<_Bn...>::value; |
42183d03 | 200 | |
137422c8 | 201 | template<typename _Pp> |
4b9840f2 | 202 | inline constexpr bool negation_v = negation<_Pp>::value; |
6963c3b9 | 203 | /// @} |
137422c8 | 204 | |
4b9840f2 | 205 | #endif // C++17 |
c3a6648b | 206 | |
608a080c AP |
207 | // Forward declarations |
208 | template<typename> | |
209 | struct is_reference; | |
210 | template<typename> | |
211 | struct is_function; | |
212 | template<typename> | |
213 | struct is_void; | |
6963c3b9 JW |
214 | template<typename> |
215 | struct remove_cv; | |
216 | template<typename> | |
217 | struct is_const; | |
218 | ||
219 | /// @cond undocumented | |
608a080c AP |
220 | template<typename> |
221 | struct __is_array_unknown_bounds; | |
222 | ||
223 | // Helper functions that return false_type for incomplete classes, | |
224 | // incomplete unions and arrays of known bound from those. | |
225 | ||
070b4df8 JW |
226 | template <typename _Tp, size_t = sizeof(_Tp)> |
227 | constexpr true_type __is_complete_or_unbounded(__type_identity<_Tp>) | |
608a080c AP |
228 | { return {}; } |
229 | ||
230 | template <typename _TypeIdentity, | |
231 | typename _NestedType = typename _TypeIdentity::type> | |
232 | constexpr typename __or_< | |
233 | is_reference<_NestedType>, | |
234 | is_function<_NestedType>, | |
235 | is_void<_NestedType>, | |
236 | __is_array_unknown_bounds<_NestedType> | |
237 | >::type __is_complete_or_unbounded(_TypeIdentity) | |
238 | { return {}; } | |
239 | ||
b3618b71 DK |
240 | // For several sfinae-friendly trait implementations we transport both the |
241 | // result information (as the member type) and the failure information (no | |
242 | // member type). This is very similar to std::enable_if, but we cannot use | |
243 | // them, because we need to derive from them as an implementation detail. | |
244 | ||
245 | template<typename _Tp> | |
246 | struct __success_type | |
247 | { typedef _Tp type; }; | |
248 | ||
249 | struct __failure_type | |
250 | { }; | |
251 | ||
391d5d2e JW |
252 | // __remove_cv_t (std::remove_cv_t for C++11). |
253 | template<typename _Tp> | |
254 | using __remove_cv_t = typename remove_cv<_Tp>::type; | |
255 | ||
72459cfd JW |
256 | // Primary type categories. |
257 | ||
53dc5044 PC |
258 | template<typename> |
259 | struct __is_void_helper | |
260 | : public false_type { }; | |
53dc5044 | 261 | |
123c516a PC |
262 | template<> |
263 | struct __is_void_helper<void> | |
264 | : public true_type { }; | |
6963c3b9 | 265 | /// @endcond |
53dc5044 PC |
266 | |
267 | /// is_void | |
268 | template<typename _Tp> | |
269 | struct is_void | |
391d5d2e | 270 | : public __is_void_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
271 | { }; |
272 | ||
6963c3b9 | 273 | /// @cond undocumented |
53dc5044 PC |
274 | template<typename> |
275 | struct __is_integral_helper | |
276 | : public false_type { }; | |
123c516a PC |
277 | |
278 | template<> | |
279 | struct __is_integral_helper<bool> | |
280 | : public true_type { }; | |
33ac58d5 | 281 | |
123c516a PC |
282 | template<> |
283 | struct __is_integral_helper<char> | |
284 | : public true_type { }; | |
285 | ||
286 | template<> | |
287 | struct __is_integral_helper<signed char> | |
288 | : public true_type { }; | |
289 | ||
290 | template<> | |
291 | struct __is_integral_helper<unsigned char> | |
292 | : public true_type { }; | |
293 | ||
29e41848 JW |
294 | // We want is_integral<wchar_t> to be true (and make_signed/unsigned to work) |
295 | // even when libc doesn't provide working <wchar.h> and related functions, | |
296 | // so check __WCHAR_TYPE__ instead of _GLIBCXX_USE_WCHAR_T. | |
297 | #ifdef __WCHAR_TYPE__ | |
123c516a PC |
298 | template<> |
299 | struct __is_integral_helper<wchar_t> | |
300 | : public true_type { }; | |
53dc5044 | 301 | #endif |
123c516a | 302 | |
c124af93 TH |
303 | #ifdef _GLIBCXX_USE_CHAR8_T |
304 | template<> | |
305 | struct __is_integral_helper<char8_t> | |
306 | : public true_type { }; | |
307 | #endif | |
308 | ||
123c516a PC |
309 | template<> |
310 | struct __is_integral_helper<char16_t> | |
311 | : public true_type { }; | |
312 | ||
313 | template<> | |
314 | struct __is_integral_helper<char32_t> | |
315 | : public true_type { }; | |
316 | ||
317 | template<> | |
318 | struct __is_integral_helper<short> | |
319 | : public true_type { }; | |
320 | ||
321 | template<> | |
322 | struct __is_integral_helper<unsigned short> | |
323 | : public true_type { }; | |
324 | ||
325 | template<> | |
326 | struct __is_integral_helper<int> | |
327 | : public true_type { }; | |
328 | ||
329 | template<> | |
330 | struct __is_integral_helper<unsigned int> | |
331 | : public true_type { }; | |
332 | ||
333 | template<> | |
334 | struct __is_integral_helper<long> | |
335 | : public true_type { }; | |
336 | ||
337 | template<> | |
338 | struct __is_integral_helper<unsigned long> | |
339 | : public true_type { }; | |
340 | ||
341 | template<> | |
342 | struct __is_integral_helper<long long> | |
343 | : public true_type { }; | |
344 | ||
345 | template<> | |
346 | struct __is_integral_helper<unsigned long long> | |
347 | : public true_type { }; | |
53dc5044 | 348 | |
78a7c317 DD |
349 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
350 | // uses one of these types for size_t. | |
351 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
42167831 | 352 | __extension__ |
6d585f01 | 353 | template<> |
78a7c317 | 354 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
6d585f01 PC |
355 | : public true_type { }; |
356 | ||
42167831 | 357 | __extension__ |
6d585f01 | 358 | template<> |
78a7c317 DD |
359 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
360 | : public true_type { }; | |
361 | #endif | |
362 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
42167831 | 363 | __extension__ |
78a7c317 DD |
364 | template<> |
365 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
366 | : public true_type { }; | |
367 | ||
42167831 | 368 | __extension__ |
78a7c317 DD |
369 | template<> |
370 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
371 | : public true_type { }; | |
372 | #endif | |
373 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
42167831 | 374 | __extension__ |
78a7c317 DD |
375 | template<> |
376 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
377 | : public true_type { }; | |
378 | ||
42167831 | 379 | __extension__ |
78a7c317 DD |
380 | template<> |
381 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
382 | : public true_type { }; | |
383 | #endif | |
384 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
42167831 | 385 | __extension__ |
78a7c317 DD |
386 | template<> |
387 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
388 | : public true_type { }; | |
389 | ||
42167831 | 390 | __extension__ |
78a7c317 DD |
391 | template<> |
392 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
6d585f01 PC |
393 | : public true_type { }; |
394 | #endif | |
6963c3b9 | 395 | /// @endcond |
6d585f01 | 396 | |
53dc5044 PC |
397 | /// is_integral |
398 | template<typename _Tp> | |
399 | struct is_integral | |
391d5d2e | 400 | : public __is_integral_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
401 | { }; |
402 | ||
6963c3b9 | 403 | /// @cond undocumented |
53dc5044 PC |
404 | template<typename> |
405 | struct __is_floating_point_helper | |
406 | : public false_type { }; | |
123c516a PC |
407 | |
408 | template<> | |
409 | struct __is_floating_point_helper<float> | |
410 | : public true_type { }; | |
411 | ||
412 | template<> | |
413 | struct __is_floating_point_helper<double> | |
414 | : public true_type { }; | |
415 | ||
416 | template<> | |
417 | struct __is_floating_point_helper<long double> | |
418 | : public true_type { }; | |
53dc5044 | 419 | |
6d585f01 PC |
420 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
421 | template<> | |
422 | struct __is_floating_point_helper<__float128> | |
423 | : public true_type { }; | |
424 | #endif | |
6963c3b9 | 425 | /// @endcond |
6d585f01 | 426 | |
53dc5044 PC |
427 | /// is_floating_point |
428 | template<typename _Tp> | |
429 | struct is_floating_point | |
391d5d2e | 430 | : public __is_floating_point_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
431 | { }; |
432 | ||
433 | /// is_array | |
434 | template<typename> | |
435 | struct is_array | |
436 | : public false_type { }; | |
437 | ||
438 | template<typename _Tp, std::size_t _Size> | |
439 | struct is_array<_Tp[_Size]> | |
440 | : public true_type { }; | |
441 | ||
442 | template<typename _Tp> | |
443 | struct is_array<_Tp[]> | |
444 | : public true_type { }; | |
445 | ||
446 | template<typename> | |
447 | struct __is_pointer_helper | |
448 | : public false_type { }; | |
123c516a PC |
449 | |
450 | template<typename _Tp> | |
451 | struct __is_pointer_helper<_Tp*> | |
452 | : public true_type { }; | |
53dc5044 PC |
453 | |
454 | /// is_pointer | |
455 | template<typename _Tp> | |
456 | struct is_pointer | |
391d5d2e | 457 | : public __is_pointer_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
458 | { }; |
459 | ||
123c516a PC |
460 | /// is_lvalue_reference |
461 | template<typename> | |
462 | struct is_lvalue_reference | |
463 | : public false_type { }; | |
464 | ||
53dc5044 | 465 | template<typename _Tp> |
123c516a PC |
466 | struct is_lvalue_reference<_Tp&> |
467 | : public true_type { }; | |
468 | ||
469 | /// is_rvalue_reference | |
470 | template<typename> | |
471 | struct is_rvalue_reference | |
472 | : public false_type { }; | |
53dc5044 | 473 | |
53dc5044 | 474 | template<typename _Tp> |
123c516a PC |
475 | struct is_rvalue_reference<_Tp&&> |
476 | : public true_type { }; | |
477 | ||
53dc5044 PC |
478 | template<typename> |
479 | struct __is_member_object_pointer_helper | |
480 | : public false_type { }; | |
123c516a PC |
481 | |
482 | template<typename _Tp, typename _Cp> | |
483 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
c01f9216 | 484 | : public __not_<is_function<_Tp>>::type { }; |
53dc5044 PC |
485 | |
486 | /// is_member_object_pointer | |
487 | template<typename _Tp> | |
488 | struct is_member_object_pointer | |
391d5d2e | 489 | : public __is_member_object_pointer_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
490 | { }; |
491 | ||
492 | template<typename> | |
493 | struct __is_member_function_pointer_helper | |
494 | : public false_type { }; | |
123c516a PC |
495 | |
496 | template<typename _Tp, typename _Cp> | |
497 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
c01f9216 | 498 | : public is_function<_Tp>::type { }; |
53dc5044 PC |
499 | |
500 | /// is_member_function_pointer | |
501 | template<typename _Tp> | |
502 | struct is_member_function_pointer | |
391d5d2e | 503 | : public __is_member_function_pointer_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
504 | { }; |
505 | ||
506 | /// is_enum | |
507 | template<typename _Tp> | |
508 | struct is_enum | |
509 | : public integral_constant<bool, __is_enum(_Tp)> | |
510 | { }; | |
511 | ||
512 | /// is_union | |
513 | template<typename _Tp> | |
514 | struct is_union | |
515 | : public integral_constant<bool, __is_union(_Tp)> | |
516 | { }; | |
517 | ||
518 | /// is_class | |
519 | template<typename _Tp> | |
520 | struct is_class | |
521 | : public integral_constant<bool, __is_class(_Tp)> | |
522 | { }; | |
523 | ||
524 | /// is_function | |
72459cfd | 525 | template<typename _Tp> |
53dc5044 | 526 | struct is_function |
72459cfd | 527 | : public __bool_constant<!is_const<const _Tp>::value> { }; |
89898034 | 528 | |
72459cfd JW |
529 | template<typename _Tp> |
530 | struct is_function<_Tp&> | |
531 | : public false_type { }; | |
89898034 | 532 | |
72459cfd JW |
533 | template<typename _Tp> |
534 | struct is_function<_Tp&&> | |
535 | : public false_type { }; | |
89898034 | 536 | |
a15f7cb8 ESR |
537 | #define __cpp_lib_is_null_pointer 201309 |
538 | ||
1e673415 | 539 | template<typename> |
aa940ab5 | 540 | struct __is_null_pointer_helper |
1e673415 | 541 | : public false_type { }; |
123c516a PC |
542 | |
543 | template<> | |
aa940ab5 | 544 | struct __is_null_pointer_helper<std::nullptr_t> |
123c516a | 545 | : public true_type { }; |
1e673415 | 546 | |
aa940ab5 PC |
547 | /// is_null_pointer (LWG 2247). |
548 | template<typename _Tp> | |
549 | struct is_null_pointer | |
391d5d2e | 550 | : public __is_null_pointer_helper<__remove_cv_t<_Tp>>::type |
aa940ab5 PC |
551 | { }; |
552 | ||
07fd852f | 553 | /// __is_nullptr_t (deprecated extension). |
aba938d6 | 554 | /// @deprecated Non-standard. Use `is_null_pointer` instead. |
1e673415 PC |
555 | template<typename _Tp> |
556 | struct __is_nullptr_t | |
aa940ab5 | 557 | : public is_null_pointer<_Tp> |
eef9bf4c | 558 | { } _GLIBCXX_DEPRECATED_SUGGEST("std::is_null_pointer"); |
1e673415 | 559 | |
c0ffa2ba | 560 | // Composite type categories. |
123c516a PC |
561 | |
562 | /// is_reference | |
563 | template<typename _Tp> | |
564 | struct is_reference | |
565 | : public __or_<is_lvalue_reference<_Tp>, | |
566 | is_rvalue_reference<_Tp>>::type | |
567 | { }; | |
568 | ||
53dc5044 PC |
569 | /// is_arithmetic |
570 | template<typename _Tp> | |
571 | struct is_arithmetic | |
123c516a | 572 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
53dc5044 PC |
573 | { }; |
574 | ||
575 | /// is_fundamental | |
576 | template<typename _Tp> | |
577 | struct is_fundamental | |
aa940ab5 PC |
578 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
579 | is_null_pointer<_Tp>>::type | |
53dc5044 PC |
580 | { }; |
581 | ||
582 | /// is_object | |
583 | template<typename _Tp> | |
584 | struct is_object | |
123c516a PC |
585 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
586 | is_void<_Tp>>>::type | |
53dc5044 PC |
587 | { }; |
588 | ||
123c516a | 589 | template<typename> |
53dc5044 PC |
590 | struct is_member_pointer; |
591 | ||
592 | /// is_scalar | |
593 | template<typename _Tp> | |
594 | struct is_scalar | |
123c516a | 595 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
aa940ab5 | 596 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
53dc5044 PC |
597 | { }; |
598 | ||
599 | /// is_compound | |
600 | template<typename _Tp> | |
601 | struct is_compound | |
c01f9216 | 602 | : public __not_<is_fundamental<_Tp>>::type { }; |
53dc5044 | 603 | |
6963c3b9 | 604 | /// @cond undocumented |
53dc5044 PC |
605 | template<typename _Tp> |
606 | struct __is_member_pointer_helper | |
607 | : public false_type { }; | |
123c516a PC |
608 | |
609 | template<typename _Tp, typename _Cp> | |
610 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
611 | : public true_type { }; | |
6963c3b9 | 612 | /// @endcond |
53dc5044 | 613 | |
13901e4b | 614 | /// is_member_pointer |
53dc5044 | 615 | template<typename _Tp> |
123c516a | 616 | struct is_member_pointer |
391d5d2e | 617 | : public __is_member_pointer_helper<__remove_cv_t<_Tp>>::type |
53dc5044 PC |
618 | { }; |
619 | ||
47f79054 JW |
620 | template<typename, typename> |
621 | struct is_same; | |
622 | ||
6963c3b9 | 623 | /// @cond undocumented |
47f79054 JW |
624 | template<typename _Tp, typename... _Types> |
625 | using __is_one_of = __or_<is_same<_Tp, _Types>...>; | |
626 | ||
627 | // Check if a type is one of the signed integer types. | |
42167831 | 628 | __extension__ |
47f79054 | 629 | template<typename _Tp> |
391d5d2e | 630 | using __is_signed_integer = __is_one_of<__remove_cv_t<_Tp>, |
47f79054 JW |
631 | signed char, signed short, signed int, signed long, |
632 | signed long long | |
633 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
634 | , signed __GLIBCXX_TYPE_INT_N_0 | |
635 | #endif | |
636 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
637 | , signed __GLIBCXX_TYPE_INT_N_1 | |
638 | #endif | |
639 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
640 | , signed __GLIBCXX_TYPE_INT_N_2 | |
641 | #endif | |
642 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
643 | , signed __GLIBCXX_TYPE_INT_N_3 | |
644 | #endif | |
645 | >; | |
646 | ||
647 | // Check if a type is one of the unsigned integer types. | |
42167831 | 648 | __extension__ |
47f79054 | 649 | template<typename _Tp> |
391d5d2e | 650 | using __is_unsigned_integer = __is_one_of<__remove_cv_t<_Tp>, |
47f79054 JW |
651 | unsigned char, unsigned short, unsigned int, unsigned long, |
652 | unsigned long long | |
653 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
654 | , unsigned __GLIBCXX_TYPE_INT_N_0 | |
655 | #endif | |
656 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
657 | , unsigned __GLIBCXX_TYPE_INT_N_1 | |
658 | #endif | |
659 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
660 | , unsigned __GLIBCXX_TYPE_INT_N_2 | |
661 | #endif | |
662 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
663 | , unsigned __GLIBCXX_TYPE_INT_N_3 | |
664 | #endif | |
665 | >; | |
666 | ||
98cf2c26 JW |
667 | // Check if a type is one of the signed or unsigned integer types. |
668 | template<typename _Tp> | |
669 | using __is_standard_integer | |
670 | = __or_<__is_signed_integer<_Tp>, __is_unsigned_integer<_Tp>>; | |
47f79054 | 671 | |
72459cfd JW |
672 | // __void_t (std::void_t for C++11) |
673 | template<typename...> using __void_t = void; | |
674 | ||
89898034 DK |
675 | // Utility to detect referenceable types ([defns.referenceable]). |
676 | ||
72459cfd | 677 | template<typename _Tp, typename = void> |
89898034 | 678 | struct __is_referenceable |
72459cfd | 679 | : public false_type |
89898034 DK |
680 | { }; |
681 | ||
72459cfd JW |
682 | template<typename _Tp> |
683 | struct __is_referenceable<_Tp, __void_t<_Tp&>> | |
89898034 DK |
684 | : public true_type |
685 | { }; | |
6963c3b9 | 686 | /// @endcond |
89898034 | 687 | |
c0ffa2ba | 688 | // Type properties. |
123c516a | 689 | |
53dc5044 PC |
690 | /// is_const |
691 | template<typename> | |
692 | struct is_const | |
693 | : public false_type { }; | |
694 | ||
695 | template<typename _Tp> | |
696 | struct is_const<_Tp const> | |
697 | : public true_type { }; | |
33ac58d5 | 698 | |
53dc5044 PC |
699 | /// is_volatile |
700 | template<typename> | |
701 | struct is_volatile | |
702 | : public false_type { }; | |
703 | ||
704 | template<typename _Tp> | |
705 | struct is_volatile<_Tp volatile> | |
706 | : public true_type { }; | |
707 | ||
123c516a PC |
708 | /// is_trivial |
709 | template<typename _Tp> | |
710 | struct is_trivial | |
711 | : public integral_constant<bool, __is_trivial(_Tp)> | |
608a080c AP |
712 | { |
713 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
714 | "template argument must be a complete class or an unbounded array"); | |
715 | }; | |
123c516a | 716 | |
6963c3b9 | 717 | /// is_trivially_copyable |
f5e523b7 VV |
718 | template<typename _Tp> |
719 | struct is_trivially_copyable | |
720 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
608a080c AP |
721 | { |
722 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
723 | "template argument must be a complete class or an unbounded array"); | |
724 | }; | |
123c516a PC |
725 | |
726 | /// is_standard_layout | |
727 | template<typename _Tp> | |
728 | struct is_standard_layout | |
729 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
608a080c AP |
730 | { |
731 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
732 | "template argument must be a complete class or an unbounded array"); | |
733 | }; | |
123c516a | 734 | |
aba938d6 JW |
735 | /** is_pod |
736 | * @deprecated Deprecated in C++20. | |
737 | * Use `is_standard_layout && is_trivial` instead. | |
6963c3b9 | 738 | */ |
123c516a PC |
739 | // Could use is_standard_layout && is_trivial instead of the builtin. |
740 | template<typename _Tp> | |
1a6c5064 JTM |
741 | struct |
742 | _GLIBCXX20_DEPRECATED("use is_standard_layout && is_trivial instead") | |
743 | is_pod | |
123c516a | 744 | : public integral_constant<bool, __is_pod(_Tp)> |
608a080c AP |
745 | { |
746 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
747 | "template argument must be a complete class or an unbounded array"); | |
748 | }; | |
123c516a | 749 | |
6963c3b9 | 750 | /** is_literal_type |
aba938d6 JW |
751 | * @deprecated Deprecated in C++17, removed in C++20. |
752 | * The idea of a literal type isn't useful. | |
6963c3b9 | 753 | */ |
123c516a | 754 | template<typename _Tp> |
24b54628 VV |
755 | struct |
756 | _GLIBCXX17_DEPRECATED | |
757 | is_literal_type | |
123c516a | 758 | : public integral_constant<bool, __is_literal_type(_Tp)> |
608a080c AP |
759 | { |
760 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
761 | "template argument must be a complete class or an unbounded array"); | |
762 | }; | |
123c516a | 763 | |
53dc5044 PC |
764 | /// is_empty |
765 | template<typename _Tp> | |
766 | struct is_empty | |
767 | : public integral_constant<bool, __is_empty(_Tp)> | |
209ee624 | 768 | { }; |
53dc5044 PC |
769 | |
770 | /// is_polymorphic | |
771 | template<typename _Tp> | |
772 | struct is_polymorphic | |
773 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
209ee624 | 774 | { }; |
53dc5044 | 775 | |
4db7fcb9 ESR |
776 | #if __cplusplus >= 201402L |
777 | #define __cpp_lib_is_final 201402L | |
778 | /// is_final | |
6963c3b9 | 779 | /// @since C++14 |
4db7fcb9 ESR |
780 | template<typename _Tp> |
781 | struct is_final | |
782 | : public integral_constant<bool, __is_final(_Tp)> | |
209ee624 | 783 | { }; |
4db7fcb9 ESR |
784 | #endif |
785 | ||
53dc5044 PC |
786 | /// is_abstract |
787 | template<typename _Tp> | |
788 | struct is_abstract | |
789 | : public integral_constant<bool, __is_abstract(_Tp)> | |
209ee624 | 790 | { }; |
53dc5044 | 791 | |
6963c3b9 | 792 | /// @cond undocumented |
123c516a | 793 | template<typename _Tp, |
6a4b1a00 | 794 | bool = is_arithmetic<_Tp>::value> |
123c516a PC |
795 | struct __is_signed_helper |
796 | : public false_type { }; | |
797 | ||
53dc5044 | 798 | template<typename _Tp> |
6a4b1a00 PC |
799 | struct __is_signed_helper<_Tp, true> |
800 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
53dc5044 | 801 | { }; |
6963c3b9 | 802 | /// @endcond |
53dc5044 | 803 | |
123c516a | 804 | /// is_signed |
53dc5044 | 805 | template<typename _Tp> |
123c516a | 806 | struct is_signed |
82b12c4b | 807 | : public __is_signed_helper<_Tp>::type |
123c516a PC |
808 | { }; |
809 | ||
810 | /// is_unsigned | |
811 | template<typename _Tp> | |
812 | struct is_unsigned | |
f7632193 | 813 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> |
123c516a PC |
814 | { }; |
815 | ||
6963c3b9 | 816 | /// @cond undocumented |
ec26ff5a JW |
817 | template<typename _Tp, typename _Up = _Tp&&> |
818 | _Up | |
819 | __declval(int); | |
820 | ||
821 | template<typename _Tp> | |
822 | _Tp | |
823 | __declval(long); | |
6963c3b9 | 824 | /// @endcond |
ec26ff5a | 825 | |
53dc5044 | 826 | template<typename _Tp> |
ec26ff5a | 827 | auto declval() noexcept -> decltype(__declval<_Tp>(0)); |
53dc5044 | 828 | |
123c516a PC |
829 | template<typename, unsigned = 0> |
830 | struct extent; | |
831 | ||
832 | template<typename> | |
833 | struct remove_all_extents; | |
834 | ||
6963c3b9 | 835 | /// @cond undocumented |
123c516a PC |
836 | template<typename _Tp> |
837 | struct __is_array_known_bounds | |
838 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
53dc5044 PC |
839 | { }; |
840 | ||
123c516a PC |
841 | template<typename _Tp> |
842 | struct __is_array_unknown_bounds | |
f7632193 | 843 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> |
53dc5044 | 844 | { }; |
33ac58d5 | 845 | |
6963c3b9 JW |
846 | // Destructible and constructible type properties. |
847 | ||
62fa805f | 848 | // In N3290 is_destructible does not say anything about function |
2c7a09d7 | 849 | // types and abstract types, see LWG 2049. This implementation |
62fa805f DK |
850 | // describes function types as non-destructible and all complete |
851 | // object types as destructible, iff the explicit destructor | |
2c7a09d7 | 852 | // call expression is wellformed. |
62fa805f | 853 | struct __do_is_destructible_impl |
123c516a | 854 | { |
62fa805f | 855 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
123c516a PC |
856 | static true_type __test(int); |
857 | ||
858 | template<typename> | |
859 | static false_type __test(...); | |
860 | }; | |
53dc5044 PC |
861 | |
862 | template<typename _Tp> | |
62fa805f DK |
863 | struct __is_destructible_impl |
864 | : public __do_is_destructible_impl | |
123c516a PC |
865 | { |
866 | typedef decltype(__test<_Tp>(0)) type; | |
867 | }; | |
53dc5044 | 868 | |
62fa805f DK |
869 | template<typename _Tp, |
870 | bool = __or_<is_void<_Tp>, | |
871 | __is_array_unknown_bounds<_Tp>, | |
872 | is_function<_Tp>>::value, | |
873 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
874 | struct __is_destructible_safe; | |
875 | ||
876 | template<typename _Tp> | |
877 | struct __is_destructible_safe<_Tp, false, false> | |
878 | : public __is_destructible_impl<typename | |
879 | remove_all_extents<_Tp>::type>::type | |
880 | { }; | |
881 | ||
882 | template<typename _Tp> | |
883 | struct __is_destructible_safe<_Tp, true, false> | |
884 | : public false_type { }; | |
885 | ||
886 | template<typename _Tp> | |
887 | struct __is_destructible_safe<_Tp, false, true> | |
888 | : public true_type { }; | |
6963c3b9 | 889 | /// @endcond |
62fa805f DK |
890 | |
891 | /// is_destructible | |
892 | template<typename _Tp> | |
893 | struct is_destructible | |
82b12c4b | 894 | : public __is_destructible_safe<_Tp>::type |
608a080c AP |
895 | { |
896 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
897 | "template argument must be a complete class or an unbounded array"); | |
898 | }; | |
62fa805f | 899 | |
6963c3b9 JW |
900 | /// @cond undocumented |
901 | ||
62fa805f DK |
902 | // is_nothrow_destructible requires that is_destructible is |
903 | // satisfied as well. We realize that by mimicing the | |
904 | // implementation of is_destructible but refer to noexcept(expr) | |
905 | // instead of decltype(expr). | |
906 | struct __do_is_nt_destructible_impl | |
123c516a | 907 | { |
62fa805f | 908 | template<typename _Tp> |
c01f9216 JW |
909 | static __bool_constant<noexcept(declval<_Tp&>().~_Tp())> |
910 | __test(int); | |
123c516a PC |
911 | |
912 | template<typename> | |
913 | static false_type __test(...); | |
914 | }; | |
53dc5044 | 915 | |
53dc5044 | 916 | template<typename _Tp> |
62fa805f DK |
917 | struct __is_nt_destructible_impl |
918 | : public __do_is_nt_destructible_impl | |
123c516a PC |
919 | { |
920 | typedef decltype(__test<_Tp>(0)) type; | |
921 | }; | |
922 | ||
923 | template<typename _Tp, | |
924 | bool = __or_<is_void<_Tp>, | |
62fa805f DK |
925 | __is_array_unknown_bounds<_Tp>, |
926 | is_function<_Tp>>::value, | |
927 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
928 | struct __is_nt_destructible_safe; | |
53dc5044 PC |
929 | |
930 | template<typename _Tp> | |
62fa805f DK |
931 | struct __is_nt_destructible_safe<_Tp, false, false> |
932 | : public __is_nt_destructible_impl<typename | |
933 | remove_all_extents<_Tp>::type>::type | |
123c516a PC |
934 | { }; |
935 | ||
53dc5044 | 936 | template<typename _Tp> |
62fa805f | 937 | struct __is_nt_destructible_safe<_Tp, true, false> |
123c516a | 938 | : public false_type { }; |
53dc5044 PC |
939 | |
940 | template<typename _Tp> | |
62fa805f | 941 | struct __is_nt_destructible_safe<_Tp, false, true> |
123c516a | 942 | : public true_type { }; |
6963c3b9 | 943 | /// @endcond |
123c516a | 944 | |
62fa805f | 945 | /// is_nothrow_destructible |
53dc5044 | 946 | template<typename _Tp> |
62fa805f | 947 | struct is_nothrow_destructible |
82b12c4b | 948 | : public __is_nt_destructible_safe<_Tp>::type |
608a080c AP |
949 | { |
950 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
951 | "template argument must be a complete class or an unbounded array"); | |
952 | }; | |
953 | ||
6963c3b9 | 954 | /// @cond undocumented |
608a080c AP |
955 | template<typename _Tp, typename... _Args> |
956 | struct __is_constructible_impl | |
957 | : public __bool_constant<__is_constructible(_Tp, _Args...)> | |
123c516a | 958 | { }; |
6963c3b9 | 959 | /// @endcond |
123c516a | 960 | |
58487c21 JW |
961 | /// is_constructible |
962 | template<typename _Tp, typename... _Args> | |
963 | struct is_constructible | |
608a080c AP |
964 | : public __is_constructible_impl<_Tp, _Args...> |
965 | { | |
966 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
967 | "template argument must be a complete class or an unbounded array"); | |
968 | }; | |
4a27a739 | 969 | |
123c516a | 970 | /// is_default_constructible |
4a27a739 | 971 | template<typename _Tp> |
123c516a | 972 | struct is_default_constructible |
608a080c AP |
973 | : public __is_constructible_impl<_Tp>::type |
974 | { | |
975 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
976 | "template argument must be a complete class or an unbounded array"); | |
977 | }; | |
c32097d8 | 978 | |
6963c3b9 | 979 | /// @cond undocumented |
89898034 | 980 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd | 981 | struct __is_copy_constructible_impl; |
123c516a | 982 | |
65cee9bd | 983 | template<typename _Tp> |
89898034 | 984 | struct __is_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
985 | : public false_type { }; |
986 | ||
987 | template<typename _Tp> | |
89898034 | 988 | struct __is_copy_constructible_impl<_Tp, true> |
608a080c | 989 | : public __is_constructible_impl<_Tp, const _Tp&> |
65cee9bd | 990 | { }; |
6963c3b9 | 991 | /// @endcond |
65cee9bd PC |
992 | |
993 | /// is_copy_constructible | |
994 | template<typename _Tp> | |
995 | struct is_copy_constructible | |
996 | : public __is_copy_constructible_impl<_Tp> | |
608a080c AP |
997 | { |
998 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
999 | "template argument must be a complete class or an unbounded array"); | |
1000 | }; | |
65cee9bd | 1001 | |
6963c3b9 | 1002 | /// @cond undocumented |
89898034 | 1003 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1004 | struct __is_move_constructible_impl; |
1005 | ||
1006 | template<typename _Tp> | |
89898034 | 1007 | struct __is_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1008 | : public false_type { }; |
1009 | ||
1010 | template<typename _Tp> | |
89898034 | 1011 | struct __is_move_constructible_impl<_Tp, true> |
608a080c | 1012 | : public __is_constructible_impl<_Tp, _Tp&&> |
65cee9bd | 1013 | { }; |
6963c3b9 | 1014 | /// @endcond |
65cee9bd PC |
1015 | |
1016 | /// is_move_constructible | |
1017 | template<typename _Tp> | |
1018 | struct is_move_constructible | |
1019 | : public __is_move_constructible_impl<_Tp> | |
608a080c AP |
1020 | { |
1021 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1022 | "template argument must be a complete class or an unbounded array"); | |
1023 | }; | |
65cee9bd | 1024 | |
6963c3b9 | 1025 | /// @cond undocumented |
b3341826 JW |
1026 | template<typename _Tp, typename... _Args> |
1027 | using __is_nothrow_constructible_impl | |
9e2256dc | 1028 | = __bool_constant<__is_nothrow_constructible(_Tp, _Args...)>; |
6963c3b9 | 1029 | /// @endcond |
b3341826 | 1030 | |
608a080c AP |
1031 | /// is_nothrow_constructible |
1032 | template<typename _Tp, typename... _Args> | |
1033 | struct is_nothrow_constructible | |
1034 | : public __is_nothrow_constructible_impl<_Tp, _Args...>::type | |
1035 | { | |
1036 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1037 | "template argument must be a complete class or an unbounded array"); | |
1038 | }; | |
1039 | ||
b3341826 JW |
1040 | /// is_nothrow_default_constructible |
1041 | template<typename _Tp> | |
1042 | struct is_nothrow_default_constructible | |
9e2256dc | 1043 | : public __bool_constant<__is_nothrow_constructible(_Tp)> |
b3341826 JW |
1044 | { |
1045 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1046 | "template argument must be a complete class or an unbounded array"); | |
1047 | }; | |
1048 | ||
6963c3b9 | 1049 | /// @cond undocumented |
89898034 | 1050 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1051 | struct __is_nothrow_copy_constructible_impl; |
1052 | ||
1053 | template<typename _Tp> | |
89898034 | 1054 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1055 | : public false_type { }; |
1056 | ||
1057 | template<typename _Tp> | |
89898034 | 1058 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
608a080c | 1059 | : public __is_nothrow_constructible_impl<_Tp, const _Tp&> |
65cee9bd | 1060 | { }; |
6963c3b9 | 1061 | /// @endcond |
65cee9bd PC |
1062 | |
1063 | /// is_nothrow_copy_constructible | |
1064 | template<typename _Tp> | |
1065 | struct is_nothrow_copy_constructible | |
608a080c AP |
1066 | : public __is_nothrow_copy_constructible_impl<_Tp>::type |
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 | }; | |
65cee9bd | 1071 | |
6963c3b9 | 1072 | /// @cond undocumented |
89898034 | 1073 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1074 | struct __is_nothrow_move_constructible_impl; |
1075 | ||
1076 | template<typename _Tp> | |
89898034 | 1077 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1078 | : public false_type { }; |
1079 | ||
1080 | template<typename _Tp> | |
89898034 | 1081 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
608a080c | 1082 | : public __is_nothrow_constructible_impl<_Tp, _Tp&&> |
65cee9bd | 1083 | { }; |
6963c3b9 | 1084 | /// @endcond |
65cee9bd PC |
1085 | |
1086 | /// is_nothrow_move_constructible | |
1087 | template<typename _Tp> | |
1088 | struct is_nothrow_move_constructible | |
608a080c AP |
1089 | : public __is_nothrow_move_constructible_impl<_Tp>::type |
1090 | { | |
1091 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1092 | "template argument must be a complete class or an unbounded array"); | |
1093 | }; | |
65cee9bd | 1094 | |
f263981a PC |
1095 | /// is_assignable |
1096 | template<typename _Tp, typename _Up> | |
1097 | struct is_assignable | |
608a080c AP |
1098 | : public __bool_constant<__is_assignable(_Tp, _Up)> |
1099 | { | |
1100 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1101 | "template argument must be a complete class or an unbounded array"); | |
1102 | }; | |
f263981a | 1103 | |
89898034 | 1104 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1105 | struct __is_copy_assignable_impl; |
1106 | ||
1107 | template<typename _Tp> | |
89898034 | 1108 | struct __is_copy_assignable_impl<_Tp, false> |
f263981a PC |
1109 | : public false_type { }; |
1110 | ||
1111 | template<typename _Tp> | |
89898034 | 1112 | struct __is_copy_assignable_impl<_Tp, true> |
608a080c | 1113 | : public __bool_constant<__is_assignable(_Tp&, const _Tp&)> |
f263981a PC |
1114 | { }; |
1115 | ||
1116 | /// is_copy_assignable | |
1117 | template<typename _Tp> | |
1118 | struct is_copy_assignable | |
608a080c AP |
1119 | : public __is_copy_assignable_impl<_Tp>::type |
1120 | { | |
1121 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1122 | "template argument must be a complete class or an unbounded array"); | |
1123 | }; | |
f263981a | 1124 | |
89898034 | 1125 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1126 | struct __is_move_assignable_impl; |
1127 | ||
1128 | template<typename _Tp> | |
89898034 | 1129 | struct __is_move_assignable_impl<_Tp, false> |
f263981a PC |
1130 | : public false_type { }; |
1131 | ||
1132 | template<typename _Tp> | |
89898034 | 1133 | struct __is_move_assignable_impl<_Tp, true> |
608a080c | 1134 | : public __bool_constant<__is_assignable(_Tp&, _Tp&&)> |
f263981a PC |
1135 | { }; |
1136 | ||
1137 | /// is_move_assignable | |
1138 | template<typename _Tp> | |
1139 | struct is_move_assignable | |
608a080c AP |
1140 | : public __is_move_assignable_impl<_Tp>::type |
1141 | { | |
1142 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1143 | "template argument must be a complete class or an unbounded array"); | |
1144 | }; | |
f263981a PC |
1145 | |
1146 | template<typename _Tp, typename _Up> | |
9e2256dc VV |
1147 | using __is_nothrow_assignable_impl |
1148 | = __bool_constant<__is_nothrow_assignable(_Tp, _Up)>; | |
f263981a | 1149 | |
608a080c AP |
1150 | /// is_nothrow_assignable |
1151 | template<typename _Tp, typename _Up> | |
1152 | struct is_nothrow_assignable | |
1153 | : public __is_nothrow_assignable_impl<_Tp, _Up> | |
1154 | { | |
1155 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1156 | "template argument must be a complete class or an unbounded array"); | |
1157 | }; | |
1158 | ||
89898034 | 1159 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1160 | struct __is_nt_copy_assignable_impl; |
1161 | ||
1162 | template<typename _Tp> | |
89898034 | 1163 | struct __is_nt_copy_assignable_impl<_Tp, false> |
f263981a PC |
1164 | : public false_type { }; |
1165 | ||
1166 | template<typename _Tp> | |
89898034 | 1167 | struct __is_nt_copy_assignable_impl<_Tp, true> |
608a080c | 1168 | : public __is_nothrow_assignable_impl<_Tp&, const _Tp&> |
f263981a PC |
1169 | { }; |
1170 | ||
1171 | /// is_nothrow_copy_assignable | |
1172 | template<typename _Tp> | |
1173 | struct is_nothrow_copy_assignable | |
1174 | : public __is_nt_copy_assignable_impl<_Tp> | |
608a080c AP |
1175 | { |
1176 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1177 | "template argument must be a complete class or an unbounded array"); | |
1178 | }; | |
f263981a | 1179 | |
89898034 | 1180 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1181 | struct __is_nt_move_assignable_impl; |
1182 | ||
1183 | template<typename _Tp> | |
89898034 | 1184 | struct __is_nt_move_assignable_impl<_Tp, false> |
f263981a PC |
1185 | : public false_type { }; |
1186 | ||
1187 | template<typename _Tp> | |
89898034 | 1188 | struct __is_nt_move_assignable_impl<_Tp, true> |
608a080c | 1189 | : public __is_nothrow_assignable_impl<_Tp&, _Tp&&> |
f263981a PC |
1190 | { }; |
1191 | ||
1192 | /// is_nothrow_move_assignable | |
65cee9bd | 1193 | template<typename _Tp> |
f263981a PC |
1194 | struct is_nothrow_move_assignable |
1195 | : public __is_nt_move_assignable_impl<_Tp> | |
608a080c AP |
1196 | { |
1197 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1198 | "template argument must be a complete class or an unbounded array"); | |
1199 | }; | |
e4f32cb0 | 1200 | |
f5e523b7 VV |
1201 | /// is_trivially_constructible |
1202 | template<typename _Tp, typename... _Args> | |
1203 | struct is_trivially_constructible | |
c01f9216 | 1204 | : public __bool_constant<__is_trivially_constructible(_Tp, _Args...)> |
608a080c AP |
1205 | { |
1206 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1207 | "template argument must be a complete class or an unbounded array"); | |
1208 | }; | |
33ac58d5 | 1209 | |
f5e523b7 VV |
1210 | /// is_trivially_default_constructible |
1211 | template<typename _Tp> | |
1212 | struct is_trivially_default_constructible | |
608a080c AP |
1213 | : public __bool_constant<__is_trivially_constructible(_Tp)> |
1214 | { | |
1215 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1216 | "template argument must be a complete class or an unbounded array"); | |
1217 | }; | |
6a9ecd34 | 1218 | |
f7632193 VV |
1219 | struct __do_is_implicitly_default_constructible_impl |
1220 | { | |
1221 | template <typename _Tp> | |
1222 | static void __helper(const _Tp&); | |
1223 | ||
1224 | template <typename _Tp> | |
1225 | static true_type __test(const _Tp&, | |
1226 | decltype(__helper<const _Tp&>({}))* = 0); | |
1227 | ||
1228 | static false_type __test(...); | |
1229 | }; | |
1230 | ||
1231 | template<typename _Tp> | |
1232 | struct __is_implicitly_default_constructible_impl | |
e9029d55 JW |
1233 | : public __do_is_implicitly_default_constructible_impl |
1234 | { | |
1235 | typedef decltype(__test(declval<_Tp>())) type; | |
1236 | }; | |
f7632193 VV |
1237 | |
1238 | template<typename _Tp> | |
1239 | struct __is_implicitly_default_constructible_safe | |
e9029d55 JW |
1240 | : public __is_implicitly_default_constructible_impl<_Tp>::type |
1241 | { }; | |
f7632193 VV |
1242 | |
1243 | template <typename _Tp> | |
1244 | struct __is_implicitly_default_constructible | |
608a080c | 1245 | : public __and_<__is_constructible_impl<_Tp>, |
e9029d55 JW |
1246 | __is_implicitly_default_constructible_safe<_Tp>> |
1247 | { }; | |
f7632193 | 1248 | |
b42cc3ca VV |
1249 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1250 | struct __is_trivially_copy_constructible_impl; | |
1251 | ||
f5e523b7 | 1252 | template<typename _Tp> |
b42cc3ca VV |
1253 | struct __is_trivially_copy_constructible_impl<_Tp, false> |
1254 | : public false_type { }; | |
1255 | ||
1256 | template<typename _Tp> | |
1257 | struct __is_trivially_copy_constructible_impl<_Tp, true> | |
608a080c | 1258 | : public __and_<__is_copy_constructible_impl<_Tp>, |
f5e523b7 | 1259 | integral_constant<bool, |
f7632193 | 1260 | __is_trivially_constructible(_Tp, const _Tp&)>> |
f5e523b7 | 1261 | { }; |
33ac58d5 | 1262 | |
608a080c | 1263 | /// is_trivially_copy_constructible |
b42cc3ca VV |
1264 | template<typename _Tp> |
1265 | struct is_trivially_copy_constructible | |
1266 | : public __is_trivially_copy_constructible_impl<_Tp> | |
608a080c AP |
1267 | { |
1268 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1269 | "template argument must be a complete class or an unbounded array"); | |
1270 | }; | |
b42cc3ca VV |
1271 | |
1272 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1273 | struct __is_trivially_move_constructible_impl; | |
1274 | ||
f5e523b7 | 1275 | template<typename _Tp> |
b42cc3ca VV |
1276 | struct __is_trivially_move_constructible_impl<_Tp, false> |
1277 | : public false_type { }; | |
1278 | ||
1279 | template<typename _Tp> | |
1280 | struct __is_trivially_move_constructible_impl<_Tp, true> | |
608a080c | 1281 | : public __and_<__is_move_constructible_impl<_Tp>, |
f5e523b7 | 1282 | integral_constant<bool, |
f7632193 | 1283 | __is_trivially_constructible(_Tp, _Tp&&)>> |
f5e523b7 | 1284 | { }; |
6a9ecd34 | 1285 | |
608a080c | 1286 | /// is_trivially_move_constructible |
b42cc3ca VV |
1287 | template<typename _Tp> |
1288 | struct is_trivially_move_constructible | |
1289 | : public __is_trivially_move_constructible_impl<_Tp> | |
608a080c AP |
1290 | { |
1291 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1292 | "template argument must be a complete class or an unbounded array"); | |
1293 | }; | |
b42cc3ca | 1294 | |
f5e523b7 VV |
1295 | /// is_trivially_assignable |
1296 | template<typename _Tp, typename _Up> | |
1297 | struct is_trivially_assignable | |
b42cc3ca | 1298 | : public __bool_constant<__is_trivially_assignable(_Tp, _Up)> |
608a080c AP |
1299 | { |
1300 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1301 | "template argument must be a complete class or an unbounded array"); | |
1302 | }; | |
b42cc3ca VV |
1303 | |
1304 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1305 | struct __is_trivially_copy_assignable_impl; | |
1306 | ||
f5e523b7 | 1307 | template<typename _Tp> |
b42cc3ca VV |
1308 | struct __is_trivially_copy_assignable_impl<_Tp, false> |
1309 | : public false_type { }; | |
1310 | ||
1311 | template<typename _Tp> | |
1312 | struct __is_trivially_copy_assignable_impl<_Tp, true> | |
c01f9216 | 1313 | : public __bool_constant<__is_trivially_assignable(_Tp&, const _Tp&)> |
f5e523b7 | 1314 | { }; |
6a9ecd34 | 1315 | |
608a080c | 1316 | /// is_trivially_copy_assignable |
b42cc3ca VV |
1317 | template<typename _Tp> |
1318 | struct is_trivially_copy_assignable | |
1319 | : public __is_trivially_copy_assignable_impl<_Tp> | |
608a080c AP |
1320 | { |
1321 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1322 | "template argument must be a complete class or an unbounded array"); | |
1323 | }; | |
b42cc3ca VV |
1324 | |
1325 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1326 | struct __is_trivially_move_assignable_impl; | |
1327 | ||
f5e523b7 | 1328 | template<typename _Tp> |
b42cc3ca VV |
1329 | struct __is_trivially_move_assignable_impl<_Tp, false> |
1330 | : public false_type { }; | |
1331 | ||
1332 | template<typename _Tp> | |
1333 | struct __is_trivially_move_assignable_impl<_Tp, true> | |
c01f9216 | 1334 | : public __bool_constant<__is_trivially_assignable(_Tp&, _Tp&&)> |
f5e523b7 | 1335 | { }; |
6a9ecd34 | 1336 | |
608a080c | 1337 | /// is_trivially_move_assignable |
b42cc3ca VV |
1338 | template<typename _Tp> |
1339 | struct is_trivially_move_assignable | |
1340 | : public __is_trivially_move_assignable_impl<_Tp> | |
608a080c AP |
1341 | { |
1342 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1343 | "template argument must be a complete class or an unbounded array"); | |
1344 | }; | |
b42cc3ca | 1345 | |
6a9ecd34 PC |
1346 | /// is_trivially_destructible |
1347 | template<typename _Tp> | |
1348 | struct is_trivially_destructible | |
608a080c | 1349 | : public __and_<__is_destructible_safe<_Tp>, |
c01f9216 | 1350 | __bool_constant<__has_trivial_destructor(_Tp)>> |
608a080c AP |
1351 | { |
1352 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1353 | "template argument must be a complete class or an unbounded array"); | |
1354 | }; | |
6a9ecd34 | 1355 | |
e133ace8 | 1356 | |
123c516a PC |
1357 | /// has_virtual_destructor |
1358 | template<typename _Tp> | |
1359 | struct has_virtual_destructor | |
1360 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
608a080c AP |
1361 | { |
1362 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1363 | "template argument must be a complete class or an unbounded array"); | |
1364 | }; | |
123c516a | 1365 | |
33ac58d5 | 1366 | |
123c516a PC |
1367 | // type property queries. |
1368 | ||
1369 | /// alignment_of | |
1370 | template<typename _Tp> | |
1371 | struct alignment_of | |
608a080c AP |
1372 | : public integral_constant<std::size_t, alignof(_Tp)> |
1373 | { | |
1374 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
1375 | "template argument must be a complete class or an unbounded array"); | |
1376 | }; | |
33ac58d5 | 1377 | |
123c516a PC |
1378 | /// rank |
1379 | template<typename> | |
1380 | struct rank | |
1381 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1382 | |
123c516a PC |
1383 | template<typename _Tp, std::size_t _Size> |
1384 | struct rank<_Tp[_Size]> | |
1385 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1386 | ||
1387 | template<typename _Tp> | |
1388 | struct rank<_Tp[]> | |
1389 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1390 | ||
1391 | /// extent | |
1392 | template<typename, unsigned _Uint> | |
1393 | struct extent | |
1394 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1395 | |
123c516a PC |
1396 | template<typename _Tp, unsigned _Uint, std::size_t _Size> |
1397 | struct extent<_Tp[_Size], _Uint> | |
1398 | : public integral_constant<std::size_t, | |
1399 | _Uint == 0 ? _Size : extent<_Tp, | |
1400 | _Uint - 1>::value> | |
1401 | { }; | |
1402 | ||
1403 | template<typename _Tp, unsigned _Uint> | |
1404 | struct extent<_Tp[], _Uint> | |
1405 | : public integral_constant<std::size_t, | |
1406 | _Uint == 0 ? 0 : extent<_Tp, | |
1407 | _Uint - 1>::value> | |
1408 | { }; | |
1409 | ||
1410 | ||
c0ffa2ba | 1411 | // Type relations. |
123c516a PC |
1412 | |
1413 | /// is_same | |
02f6fdff | 1414 | template<typename _Tp, typename _Up> |
123c516a | 1415 | struct is_same |
73ae6eb5 JW |
1416 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_SAME |
1417 | : public integral_constant<bool, __is_same(_Tp, _Up)> | |
44af818f JW |
1418 | #else |
1419 | : public false_type | |
1420 | #endif | |
02f6fdff | 1421 | { }; |
b0302c68 | 1422 | |
73ae6eb5 | 1423 | #ifndef _GLIBCXX_HAVE_BUILTIN_IS_SAME |
44af818f JW |
1424 | template<typename _Tp> |
1425 | struct is_same<_Tp, _Tp> | |
1426 | : public true_type | |
1427 | { }; | |
1428 | #endif | |
1429 | ||
939759fc | 1430 | /// is_base_of |
e133ace8 PC |
1431 | template<typename _Base, typename _Derived> |
1432 | struct is_base_of | |
1433 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1434 | { }; | |
1435 | ||
297f34d7 | 1436 | template<typename _From, typename _To, |
123c516a PC |
1437 | bool = __or_<is_void<_From>, is_function<_To>, |
1438 | is_array<_To>>::value> | |
297f34d7 | 1439 | struct __is_convertible_helper |
8df27fcb JW |
1440 | { |
1441 | typedef typename is_void<_To>::type type; | |
8df27fcb | 1442 | }; |
297f34d7 | 1443 | |
cc28d234 JW |
1444 | #pragma GCC diagnostic push |
1445 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
e133ace8 | 1446 | template<typename _From, typename _To> |
b0302c68 | 1447 | class __is_convertible_helper<_From, _To, false> |
e133ace8 | 1448 | { |
8df27fcb JW |
1449 | template<typename _To1> |
1450 | static void __test_aux(_To1) noexcept; | |
8e7d962a | 1451 | |
82b12c4b FD |
1452 | template<typename _From1, typename _To1, |
1453 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1454 | static true_type | |
8e7d962a PC |
1455 | __test(int); |
1456 | ||
1457 | template<typename, typename> | |
82b12c4b FD |
1458 | static false_type |
1459 | __test(...); | |
297f34d7 | 1460 | |
e133ace8 | 1461 | public: |
82b12c4b | 1462 | typedef decltype(__test<_From, _To>(0)) type; |
e133ace8 | 1463 | }; |
cc28d234 | 1464 | #pragma GCC diagnostic pop |
82b12c4b | 1465 | |
b0302c68 | 1466 | /// is_convertible |
e133ace8 PC |
1467 | template<typename _From, typename _To> |
1468 | struct is_convertible | |
82b12c4b | 1469 | : public __is_convertible_helper<_From, _To>::type |
e133ace8 PC |
1470 | { }; |
1471 | ||
0302a2de JW |
1472 | // helper trait for unique_ptr<T[]>, shared_ptr<T[]>, and span<T, N> |
1473 | template<typename _ToElementType, typename _FromElementType> | |
1474 | using __is_array_convertible | |
1475 | = is_convertible<_FromElementType(*)[], _ToElementType(*)[]>; | |
1476 | ||
608a080c | 1477 | template<typename _From, typename _To, |
ed99e818 JW |
1478 | bool = __or_<is_void<_From>, is_function<_To>, |
1479 | is_array<_To>>::value> | |
1480 | struct __is_nt_convertible_helper | |
1481 | : is_void<_To> | |
1482 | { }; | |
1483 | ||
cc28d234 JW |
1484 | #pragma GCC diagnostic push |
1485 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
ed99e818 JW |
1486 | template<typename _From, typename _To> |
1487 | class __is_nt_convertible_helper<_From, _To, false> | |
1488 | { | |
1489 | template<typename _To1> | |
1490 | static void __test_aux(_To1) noexcept; | |
1491 | ||
1492 | template<typename _From1, typename _To1> | |
ce9f305e JW |
1493 | static |
1494 | __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))> | |
ed99e818 JW |
1495 | __test(int); |
1496 | ||
1497 | template<typename, typename> | |
1498 | static false_type | |
1499 | __test(...); | |
1500 | ||
1501 | public: | |
1502 | using type = decltype(__test<_From, _To>(0)); | |
1503 | }; | |
cc28d234 | 1504 | #pragma GCC diagnostic pop |
ed99e818 | 1505 | |
ce9f305e JW |
1506 | // is_nothrow_convertible for C++11 |
1507 | template<typename _From, typename _To> | |
1508 | struct __is_nothrow_convertible | |
1509 | : public __is_nt_convertible_helper<_From, _To>::type | |
1510 | { }; | |
1511 | ||
1512 | #if __cplusplus > 201703L | |
56772f62 | 1513 | #define __cpp_lib_is_nothrow_convertible 201806L |
8df27fcb JW |
1514 | /// is_nothrow_convertible |
1515 | template<typename _From, typename _To> | |
1516 | struct is_nothrow_convertible | |
ed99e818 | 1517 | : public __is_nt_convertible_helper<_From, _To>::type |
8df27fcb JW |
1518 | { }; |
1519 | ||
1520 | /// is_nothrow_convertible_v | |
1521 | template<typename _From, typename _To> | |
1522 | inline constexpr bool is_nothrow_convertible_v | |
1523 | = is_nothrow_convertible<_From, _To>::value; | |
1524 | #endif // C++2a | |
fd735b6a | 1525 | |
c0ffa2ba | 1526 | // Const-volatile modifications. |
7b50cdef | 1527 | |
123c516a | 1528 | /// remove_const |
7b50cdef | 1529 | template<typename _Tp> |
123c516a PC |
1530 | struct remove_const |
1531 | { typedef _Tp type; }; | |
7b50cdef | 1532 | |
123c516a PC |
1533 | template<typename _Tp> |
1534 | struct remove_const<_Tp const> | |
1535 | { typedef _Tp type; }; | |
33ac58d5 | 1536 | |
123c516a PC |
1537 | /// remove_volatile |
1538 | template<typename _Tp> | |
1539 | struct remove_volatile | |
1540 | { typedef _Tp type; }; | |
7b50cdef | 1541 | |
123c516a PC |
1542 | template<typename _Tp> |
1543 | struct remove_volatile<_Tp volatile> | |
1544 | { typedef _Tp type; }; | |
33ac58d5 | 1545 | |
123c516a PC |
1546 | /// remove_cv |
1547 | template<typename _Tp> | |
1548 | struct remove_cv | |
391d5d2e JW |
1549 | { using type = _Tp; }; |
1550 | ||
1551 | template<typename _Tp> | |
1552 | struct remove_cv<const _Tp> | |
1553 | { using type = _Tp; }; | |
1554 | ||
1555 | template<typename _Tp> | |
1556 | struct remove_cv<volatile _Tp> | |
1557 | { using type = _Tp; }; | |
1558 | ||
1559 | template<typename _Tp> | |
1560 | struct remove_cv<const volatile _Tp> | |
1561 | { using type = _Tp; }; | |
33ac58d5 | 1562 | |
123c516a PC |
1563 | /// add_const |
1564 | template<typename _Tp> | |
1565 | struct add_const | |
1566 | { typedef _Tp const type; }; | |
33ac58d5 | 1567 | |
123c516a PC |
1568 | /// add_volatile |
1569 | template<typename _Tp> | |
1570 | struct add_volatile | |
1571 | { typedef _Tp volatile type; }; | |
33ac58d5 | 1572 | |
123c516a PC |
1573 | /// add_cv |
1574 | template<typename _Tp> | |
1575 | struct add_cv | |
1576 | { | |
1577 | typedef typename | |
1578 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1579 | }; | |
7b50cdef | 1580 | |
4457e88c | 1581 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
1582 | |
1583 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1584 | ||
4457e88c JW |
1585 | /// Alias template for remove_const |
1586 | template<typename _Tp> | |
1587 | using remove_const_t = typename remove_const<_Tp>::type; | |
1588 | ||
1589 | /// Alias template for remove_volatile | |
1590 | template<typename _Tp> | |
1591 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1592 | ||
1593 | /// Alias template for remove_cv | |
1594 | template<typename _Tp> | |
1595 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1596 | ||
1597 | /// Alias template for add_const | |
1598 | template<typename _Tp> | |
1599 | using add_const_t = typename add_const<_Tp>::type; | |
1600 | ||
1601 | /// Alias template for add_volatile | |
1602 | template<typename _Tp> | |
1603 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1604 | ||
1605 | /// Alias template for add_cv | |
1606 | template<typename _Tp> | |
1607 | using add_cv_t = typename add_cv<_Tp>::type; | |
1608 | #endif | |
7b50cdef | 1609 | |
123c516a | 1610 | // Reference transformations. |
7b50cdef | 1611 | |
123c516a PC |
1612 | /// remove_reference |
1613 | template<typename _Tp> | |
1614 | struct remove_reference | |
1615 | { typedef _Tp type; }; | |
7b50cdef | 1616 | |
123c516a PC |
1617 | template<typename _Tp> |
1618 | struct remove_reference<_Tp&> | |
1619 | { typedef _Tp type; }; | |
7b50cdef | 1620 | |
123c516a PC |
1621 | template<typename _Tp> |
1622 | struct remove_reference<_Tp&&> | |
1623 | { typedef _Tp type; }; | |
1624 | ||
89898034 | 1625 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1626 | struct __add_lvalue_reference_helper |
1627 | { typedef _Tp type; }; | |
7b50cdef | 1628 | |
5e108459 | 1629 | template<typename _Tp> |
89898034 | 1630 | struct __add_lvalue_reference_helper<_Tp, true> |
123c516a | 1631 | { typedef _Tp& type; }; |
5e108459 | 1632 | |
123c516a | 1633 | /// add_lvalue_reference |
5e108459 | 1634 | template<typename _Tp> |
123c516a PC |
1635 | struct add_lvalue_reference |
1636 | : public __add_lvalue_reference_helper<_Tp> | |
1637 | { }; | |
1638 | ||
89898034 | 1639 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1640 | struct __add_rvalue_reference_helper |
1641 | { typedef _Tp type; }; | |
5e108459 PC |
1642 | |
1643 | template<typename _Tp> | |
123c516a PC |
1644 | struct __add_rvalue_reference_helper<_Tp, true> |
1645 | { typedef _Tp&& type; }; | |
5e108459 | 1646 | |
123c516a | 1647 | /// add_rvalue_reference |
5e108459 | 1648 | template<typename _Tp> |
123c516a PC |
1649 | struct add_rvalue_reference |
1650 | : public __add_rvalue_reference_helper<_Tp> | |
1651 | { }; | |
5e108459 | 1652 | |
4457e88c JW |
1653 | #if __cplusplus > 201103L |
1654 | /// Alias template for remove_reference | |
1655 | template<typename _Tp> | |
1656 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1657 | ||
1658 | /// Alias template for add_lvalue_reference | |
1659 | template<typename _Tp> | |
1660 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1661 | ||
1662 | /// Alias template for add_rvalue_reference | |
1663 | template<typename _Tp> | |
1664 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1665 | #endif | |
7b50cdef | 1666 | |
c0ffa2ba | 1667 | // Sign modifications. |
123c516a | 1668 | |
6963c3b9 JW |
1669 | /// @cond undocumented |
1670 | ||
7b50cdef BK |
1671 | // Utility for constructing identically cv-qualified types. |
1672 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1673 | struct __cv_selector; | |
1674 | ||
1675 | template<typename _Unqualified> | |
1676 | struct __cv_selector<_Unqualified, false, false> | |
1677 | { typedef _Unqualified __type; }; | |
1678 | ||
1679 | template<typename _Unqualified> | |
1680 | struct __cv_selector<_Unqualified, false, true> | |
1681 | { typedef volatile _Unqualified __type; }; | |
1682 | ||
1683 | template<typename _Unqualified> | |
1684 | struct __cv_selector<_Unqualified, true, false> | |
1685 | { typedef const _Unqualified __type; }; | |
1686 | ||
1687 | template<typename _Unqualified> | |
1688 | struct __cv_selector<_Unqualified, true, true> | |
1689 | { typedef const volatile _Unqualified __type; }; | |
1690 | ||
1691 | template<typename _Qualified, typename _Unqualified, | |
1692 | bool _IsConst = is_const<_Qualified>::value, | |
1693 | bool _IsVol = is_volatile<_Qualified>::value> | |
b0302c68 | 1694 | class __match_cv_qualifiers |
7b50cdef | 1695 | { |
7b50cdef BK |
1696 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1697 | ||
1698 | public: | |
33ac58d5 | 1699 | typedef typename __match::__type __type; |
7b50cdef BK |
1700 | }; |
1701 | ||
7b50cdef BK |
1702 | // Utility for finding the unsigned versions of signed integral types. |
1703 | template<typename _Tp> | |
e133ace8 PC |
1704 | struct __make_unsigned |
1705 | { typedef _Tp __type; }; | |
7b50cdef BK |
1706 | |
1707 | template<> | |
1708 | struct __make_unsigned<char> | |
1709 | { typedef unsigned char __type; }; | |
1710 | ||
1711 | template<> | |
1712 | struct __make_unsigned<signed char> | |
1713 | { typedef unsigned char __type; }; | |
1714 | ||
7b50cdef BK |
1715 | template<> |
1716 | struct __make_unsigned<short> | |
1717 | { typedef unsigned short __type; }; | |
1718 | ||
1719 | template<> | |
1720 | struct __make_unsigned<int> | |
1721 | { typedef unsigned int __type; }; | |
1722 | ||
1723 | template<> | |
1724 | struct __make_unsigned<long> | |
1725 | { typedef unsigned long __type; }; | |
1726 | ||
1727 | template<> | |
1728 | struct __make_unsigned<long long> | |
1729 | { typedef unsigned long long __type; }; | |
1730 | ||
78a7c317 | 1731 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
42167831 | 1732 | __extension__ |
78a7c317 DD |
1733 | template<> |
1734 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1735 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1736 | #endif | |
1737 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
42167831 | 1738 | __extension__ |
78a7c317 DD |
1739 | template<> |
1740 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1741 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1742 | #endif | |
1743 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
42167831 | 1744 | __extension__ |
6d585f01 | 1745 | template<> |
78a7c317 DD |
1746 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1747 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1748 | #endif | |
1749 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
42167831 | 1750 | __extension__ |
78a7c317 DD |
1751 | template<> |
1752 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1753 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1754 | #endif |
1755 | ||
7b50cdef | 1756 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1757 | template<typename _Tp, |
7b50cdef | 1758 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1759 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1760 | class __make_unsigned_selector; |
1761 | ||
7b50cdef | 1762 | template<typename _Tp> |
b0302c68 | 1763 | class __make_unsigned_selector<_Tp, true, false> |
7b50cdef | 1764 | { |
22f1f4c7 | 1765 | using __unsigned_type |
391d5d2e | 1766 | = typename __make_unsigned<__remove_cv_t<_Tp>>::__type; |
7b50cdef BK |
1767 | |
1768 | public: | |
22f1f4c7 JW |
1769 | using __type |
1770 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
7b50cdef BK |
1771 | }; |
1772 | ||
22f1f4c7 JW |
1773 | class __make_unsigned_selector_base |
1774 | { | |
1775 | protected: | |
1776 | template<typename...> struct _List { }; | |
1777 | ||
1778 | template<typename _Tp, typename... _Up> | |
1779 | struct _List<_Tp, _Up...> : _List<_Up...> | |
1780 | { static constexpr size_t __size = sizeof(_Tp); }; | |
1781 | ||
1782 | template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)> | |
1783 | struct __select; | |
1784 | ||
1785 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1786 | struct __select<_Sz, _List<_Uint, _UInts...>, true> | |
1787 | { using __type = _Uint; }; | |
1788 | ||
1789 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1790 | struct __select<_Sz, _List<_Uint, _UInts...>, false> | |
1791 | : __select<_Sz, _List<_UInts...>> | |
1792 | { }; | |
1793 | }; | |
1794 | ||
1795 | // Choose unsigned integer type with the smallest rank and same size as _Tp | |
7b50cdef | 1796 | template<typename _Tp> |
b0302c68 | 1797 | class __make_unsigned_selector<_Tp, false, true> |
22f1f4c7 | 1798 | : __make_unsigned_selector_base |
7b50cdef | 1799 | { |
a0230468 | 1800 | // With -fshort-enums, an enum may be as small as a char. |
22f1f4c7 JW |
1801 | using _UInts = _List<unsigned char, unsigned short, unsigned int, |
1802 | unsigned long, unsigned long long>; | |
1803 | ||
1804 | using __unsigned_type = typename __select<sizeof(_Tp), _UInts>::__type; | |
73d81d3a | 1805 | |
7b50cdef | 1806 | public: |
22f1f4c7 JW |
1807 | using __type |
1808 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
1809 | }; | |
1810 | ||
c124af93 TH |
1811 | // wchar_t, char8_t, char16_t and char32_t are integral types but are |
1812 | // neither signed integer types nor unsigned integer types, so must be | |
22f1f4c7 JW |
1813 | // transformed to the unsigned integer type with the smallest rank. |
1814 | // Use the partial specialization for enumeration types to do that. | |
29e41848 | 1815 | #ifdef __WCHAR_TYPE__ |
22f1f4c7 JW |
1816 | template<> |
1817 | struct __make_unsigned<wchar_t> | |
1818 | { | |
1819 | using __type | |
1820 | = typename __make_unsigned_selector<wchar_t, false, true>::__type; | |
1821 | }; | |
1822 | #endif | |
1823 | ||
c124af93 TH |
1824 | #ifdef _GLIBCXX_USE_CHAR8_T |
1825 | template<> | |
1826 | struct __make_unsigned<char8_t> | |
1827 | { | |
1828 | using __type | |
1829 | = typename __make_unsigned_selector<char8_t, false, true>::__type; | |
1830 | }; | |
1831 | #endif | |
1832 | ||
22f1f4c7 JW |
1833 | template<> |
1834 | struct __make_unsigned<char16_t> | |
1835 | { | |
1836 | using __type | |
1837 | = typename __make_unsigned_selector<char16_t, false, true>::__type; | |
1838 | }; | |
1839 | ||
1840 | template<> | |
1841 | struct __make_unsigned<char32_t> | |
1842 | { | |
1843 | using __type | |
1844 | = typename __make_unsigned_selector<char32_t, false, true>::__type; | |
7b50cdef | 1845 | }; |
6963c3b9 | 1846 | /// @endcond |
7b50cdef | 1847 | |
7b50cdef BK |
1848 | // Given an integral/enum type, return the corresponding unsigned |
1849 | // integer type. | |
5b9daa7e BK |
1850 | // Primary template. |
1851 | /// make_unsigned | |
7b50cdef | 1852 | template<typename _Tp> |
33ac58d5 | 1853 | struct make_unsigned |
7b50cdef BK |
1854 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
1855 | ||
1856 | // Integral, but don't define. | |
1857 | template<> | |
1858 | struct make_unsigned<bool>; | |
1859 | ||
6963c3b9 | 1860 | /// @cond undocumented |
7b50cdef BK |
1861 | |
1862 | // Utility for finding the signed versions of unsigned integral types. | |
1863 | template<typename _Tp> | |
e133ace8 PC |
1864 | struct __make_signed |
1865 | { typedef _Tp __type; }; | |
7b50cdef BK |
1866 | |
1867 | template<> | |
1868 | struct __make_signed<char> | |
1869 | { typedef signed char __type; }; | |
1870 | ||
1871 | template<> | |
1872 | struct __make_signed<unsigned char> | |
1873 | { typedef signed char __type; }; | |
1874 | ||
7b50cdef BK |
1875 | template<> |
1876 | struct __make_signed<unsigned short> | |
1877 | { typedef signed short __type; }; | |
1878 | ||
1879 | template<> | |
1880 | struct __make_signed<unsigned int> | |
1881 | { typedef signed int __type; }; | |
1882 | ||
1883 | template<> | |
1884 | struct __make_signed<unsigned long> | |
1885 | { typedef signed long __type; }; | |
1886 | ||
1887 | template<> | |
1888 | struct __make_signed<unsigned long long> | |
1889 | { typedef signed long long __type; }; | |
1890 | ||
78a7c317 | 1891 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
42167831 | 1892 | __extension__ |
78a7c317 DD |
1893 | template<> |
1894 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1895 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1896 | #endif | |
1897 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
42167831 | 1898 | __extension__ |
78a7c317 DD |
1899 | template<> |
1900 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1901 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1902 | #endif | |
1903 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
42167831 | 1904 | __extension__ |
78a7c317 DD |
1905 | template<> |
1906 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1907 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1908 | #endif | |
1909 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
42167831 | 1910 | __extension__ |
6d585f01 | 1911 | template<> |
78a7c317 DD |
1912 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1913 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1914 | #endif |
1915 | ||
fb8ffd10 | 1916 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1917 | template<typename _Tp, |
7b50cdef | 1918 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1919 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1920 | class __make_signed_selector; |
1921 | ||
7b50cdef | 1922 | template<typename _Tp> |
b0302c68 | 1923 | class __make_signed_selector<_Tp, true, false> |
7b50cdef | 1924 | { |
22f1f4c7 | 1925 | using __signed_type |
391d5d2e | 1926 | = typename __make_signed<__remove_cv_t<_Tp>>::__type; |
7b50cdef BK |
1927 | |
1928 | public: | |
22f1f4c7 JW |
1929 | using __type |
1930 | = typename __match_cv_qualifiers<_Tp, __signed_type>::__type; | |
7b50cdef BK |
1931 | }; |
1932 | ||
22f1f4c7 | 1933 | // Choose signed integer type with the smallest rank and same size as _Tp |
7b50cdef | 1934 | template<typename _Tp> |
b0302c68 | 1935 | class __make_signed_selector<_Tp, false, true> |
7b50cdef | 1936 | { |
73d81d3a | 1937 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
7b50cdef BK |
1938 | |
1939 | public: | |
73d81d3a | 1940 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
7b50cdef BK |
1941 | }; |
1942 | ||
22f1f4c7 | 1943 | // wchar_t, char16_t and char32_t are integral types but are neither |
d4b695e4 | 1944 | // signed integer types nor unsigned integer types, so must be |
22f1f4c7 JW |
1945 | // transformed to the signed integer type with the smallest rank. |
1946 | // Use the partial specialization for enumeration types to do that. | |
29e41848 | 1947 | #if defined(__WCHAR_TYPE__) |
22f1f4c7 JW |
1948 | template<> |
1949 | struct __make_signed<wchar_t> | |
1950 | { | |
1951 | using __type | |
1952 | = typename __make_signed_selector<wchar_t, false, true>::__type; | |
1953 | }; | |
1954 | #endif | |
1955 | ||
c124af93 TH |
1956 | #if defined(_GLIBCXX_USE_CHAR8_T) |
1957 | template<> | |
1958 | struct __make_signed<char8_t> | |
1959 | { | |
1960 | using __type | |
1961 | = typename __make_signed_selector<char8_t, false, true>::__type; | |
1962 | }; | |
1963 | #endif | |
1964 | ||
22f1f4c7 JW |
1965 | template<> |
1966 | struct __make_signed<char16_t> | |
1967 | { | |
1968 | using __type | |
1969 | = typename __make_signed_selector<char16_t, false, true>::__type; | |
1970 | }; | |
1971 | ||
1972 | template<> | |
1973 | struct __make_signed<char32_t> | |
1974 | { | |
1975 | using __type | |
1976 | = typename __make_signed_selector<char32_t, false, true>::__type; | |
1977 | }; | |
6963c3b9 | 1978 | /// @endcond |
22f1f4c7 | 1979 | |
7b50cdef BK |
1980 | // Given an integral/enum type, return the corresponding signed |
1981 | // integer type. | |
5b9daa7e BK |
1982 | // Primary template. |
1983 | /// make_signed | |
7b50cdef | 1984 | template<typename _Tp> |
33ac58d5 | 1985 | struct make_signed |
7b50cdef BK |
1986 | { typedef typename __make_signed_selector<_Tp>::__type type; }; |
1987 | ||
1988 | // Integral, but don't define. | |
1989 | template<> | |
1990 | struct make_signed<bool>; | |
cfa9a96b | 1991 | |
4457e88c JW |
1992 | #if __cplusplus > 201103L |
1993 | /// Alias template for make_signed | |
1994 | template<typename _Tp> | |
1995 | using make_signed_t = typename make_signed<_Tp>::type; | |
1996 | ||
1997 | /// Alias template for make_unsigned | |
1998 | template<typename _Tp> | |
1999 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
2000 | #endif | |
123c516a | 2001 | |
c0ffa2ba | 2002 | // Array modifications. |
123c516a PC |
2003 | |
2004 | /// remove_extent | |
2005 | template<typename _Tp> | |
2006 | struct remove_extent | |
2007 | { typedef _Tp type; }; | |
2008 | ||
2009 | template<typename _Tp, std::size_t _Size> | |
2010 | struct remove_extent<_Tp[_Size]> | |
2011 | { typedef _Tp type; }; | |
2012 | ||
2013 | template<typename _Tp> | |
2014 | struct remove_extent<_Tp[]> | |
2015 | { typedef _Tp type; }; | |
2016 | ||
2017 | /// remove_all_extents | |
2018 | template<typename _Tp> | |
2019 | struct remove_all_extents | |
2020 | { typedef _Tp type; }; | |
2021 | ||
2022 | template<typename _Tp, std::size_t _Size> | |
2023 | struct remove_all_extents<_Tp[_Size]> | |
2024 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
2025 | ||
2026 | template<typename _Tp> | |
2027 | struct remove_all_extents<_Tp[]> | |
2028 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
2029 | ||
4457e88c JW |
2030 | #if __cplusplus > 201103L |
2031 | /// Alias template for remove_extent | |
2032 | template<typename _Tp> | |
2033 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
2034 | ||
2035 | /// Alias template for remove_all_extents | |
2036 | template<typename _Tp> | |
2037 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
2038 | #endif | |
123c516a | 2039 | |
c0ffa2ba | 2040 | // Pointer modifications. |
123c516a PC |
2041 | |
2042 | template<typename _Tp, typename> | |
2043 | struct __remove_pointer_helper | |
2044 | { typedef _Tp type; }; | |
2045 | ||
2046 | template<typename _Tp, typename _Up> | |
2047 | struct __remove_pointer_helper<_Tp, _Up*> | |
2048 | { typedef _Up type; }; | |
2049 | ||
2050 | /// remove_pointer | |
2051 | template<typename _Tp> | |
2052 | struct remove_pointer | |
391d5d2e | 2053 | : public __remove_pointer_helper<_Tp, __remove_cv_t<_Tp>> |
123c516a PC |
2054 | { }; |
2055 | ||
89898034 DK |
2056 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
2057 | is_void<_Tp>>::value> | |
2058 | struct __add_pointer_helper | |
2059 | { typedef _Tp type; }; | |
2060 | ||
123c516a | 2061 | template<typename _Tp> |
89898034 | 2062 | struct __add_pointer_helper<_Tp, true> |
123c516a PC |
2063 | { typedef typename remove_reference<_Tp>::type* type; }; |
2064 | ||
6963c3b9 | 2065 | /// add_pointer |
89898034 | 2066 | template<typename _Tp> |
33ac58d5 | 2067 | struct add_pointer |
89898034 DK |
2068 | : public __add_pointer_helper<_Tp> |
2069 | { }; | |
2070 | ||
4457e88c JW |
2071 | #if __cplusplus > 201103L |
2072 | /// Alias template for remove_pointer | |
2073 | template<typename _Tp> | |
2074 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
2075 | ||
2076 | /// Alias template for add_pointer | |
2077 | template<typename _Tp> | |
2078 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
2079 | #endif | |
123c516a PC |
2080 | |
2081 | template<std::size_t _Len> | |
2082 | struct __aligned_storage_msa | |
33ac58d5 | 2083 | { |
123c516a PC |
2084 | union __type |
2085 | { | |
2086 | unsigned char __data[_Len]; | |
33ac58d5 | 2087 | struct __attribute__((__aligned__)) { } __align; |
123c516a PC |
2088 | }; |
2089 | }; | |
2090 | ||
2091 | /** | |
2092 | * @brief Alignment type. | |
2093 | * | |
2094 | * The value of _Align is a default-alignment which shall be the | |
2095 | * most stringent alignment requirement for any C++ object type | |
2096 | * whose size is no greater than _Len (3.9). The member typedef | |
2097 | * type shall be a POD type suitable for use as uninitialized | |
2098 | * storage for any object whose size is at most _Len and whose | |
2099 | * alignment is a divisor of _Align. | |
2100 | */ | |
2101 | template<std::size_t _Len, std::size_t _Align = | |
2102 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2103 | struct aligned_storage | |
33ac58d5 | 2104 | { |
123c516a PC |
2105 | union type |
2106 | { | |
2107 | unsigned char __data[_Len]; | |
33ac58d5 | 2108 | struct __attribute__((__aligned__((_Align)))) { } __align; |
123c516a PC |
2109 | }; |
2110 | }; | |
2111 | ||
d3718027 RS |
2112 | template <typename... _Types> |
2113 | struct __strictest_alignment | |
2114 | { | |
2115 | static const size_t _S_alignment = 0; | |
2116 | static const size_t _S_size = 0; | |
2117 | }; | |
2118 | ||
2119 | template <typename _Tp, typename... _Types> | |
2120 | struct __strictest_alignment<_Tp, _Types...> | |
2121 | { | |
2122 | static const size_t _S_alignment = | |
2123 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2124 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2125 | static const size_t _S_size = | |
2126 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2127 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2128 | }; | |
2129 | ||
2130 | /** | |
2131 | * @brief Provide aligned storage for types. | |
2132 | * | |
2133 | * [meta.trans.other] | |
2134 | * | |
2135 | * Provides aligned storage for any of the provided types of at | |
2136 | * least size _Len. | |
2137 | * | |
2138 | * @see aligned_storage | |
2139 | */ | |
2140 | template <size_t _Len, typename... _Types> | |
2141 | struct aligned_union | |
2142 | { | |
2143 | private: | |
2144 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2145 | ||
2146 | using __strictest = __strictest_alignment<_Types...>; | |
2147 | static const size_t _S_len = _Len > __strictest::_S_size | |
2148 | ? _Len : __strictest::_S_size; | |
2149 | public: | |
2150 | /// The value of the strictest alignment of _Types. | |
2151 | static const size_t alignment_value = __strictest::_S_alignment; | |
2152 | /// The storage. | |
2153 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2154 | }; | |
2155 | ||
2156 | template <size_t _Len, typename... _Types> | |
2157 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
123c516a | 2158 | |
6963c3b9 JW |
2159 | /// @cond undocumented |
2160 | ||
123c516a PC |
2161 | // Decay trait for arrays and functions, used for perfect forwarding |
2162 | // in make_pair, make_tuple, etc. | |
33ac58d5 | 2163 | template<typename _Up, |
123c516a | 2164 | bool _IsArray = is_array<_Up>::value, |
33ac58d5 | 2165 | bool _IsFunction = is_function<_Up>::value> |
123c516a PC |
2166 | struct __decay_selector; |
2167 | ||
2168 | // NB: DR 705. | |
33ac58d5 | 2169 | template<typename _Up> |
123c516a | 2170 | struct __decay_selector<_Up, false, false> |
391d5d2e | 2171 | { typedef __remove_cv_t<_Up> __type; }; |
123c516a | 2172 | |
33ac58d5 | 2173 | template<typename _Up> |
123c516a PC |
2174 | struct __decay_selector<_Up, true, false> |
2175 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2176 | ||
33ac58d5 | 2177 | template<typename _Up> |
123c516a PC |
2178 | struct __decay_selector<_Up, false, true> |
2179 | { typedef typename add_pointer<_Up>::type __type; }; | |
6963c3b9 | 2180 | /// @endcond |
123c516a PC |
2181 | |
2182 | /// decay | |
33ac58d5 JW |
2183 | template<typename _Tp> |
2184 | class decay | |
2185 | { | |
123c516a PC |
2186 | typedef typename remove_reference<_Tp>::type __remove_type; |
2187 | ||
2188 | public: | |
2189 | typedef typename __decay_selector<__remove_type>::__type type; | |
2190 | }; | |
2191 | ||
6963c3b9 | 2192 | /// @cond undocumented |
123c516a PC |
2193 | |
2194 | // Helper which adds a reference to a type when given a reference_wrapper | |
2195 | template<typename _Tp> | |
2196 | struct __strip_reference_wrapper | |
2197 | { | |
2198 | typedef _Tp __type; | |
2199 | }; | |
2200 | ||
2201 | template<typename _Tp> | |
2202 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2203 | { | |
2204 | typedef _Tp& __type; | |
2205 | }; | |
2206 | ||
6963c3b9 | 2207 | // __decay_t (std::decay_t for C++11). |
123c516a | 2208 | template<typename _Tp> |
6963c3b9 | 2209 | using __decay_t = typename decay<_Tp>::type; |
123c516a | 2210 | |
6963c3b9 JW |
2211 | template<typename _Tp> |
2212 | using __decay_and_strip = __strip_reference_wrapper<__decay_t<_Tp>>; | |
2213 | /// @endcond | |
123c516a | 2214 | |
123c516a | 2215 | // Primary template. |
6963c3b9 | 2216 | /// Define a member typedef `type` only if a boolean constant is true. |
123c516a | 2217 | template<bool, typename _Tp = void> |
33ac58d5 | 2218 | struct enable_if |
123c516a PC |
2219 | { }; |
2220 | ||
2221 | // Partial specialization for true. | |
2222 | template<typename _Tp> | |
2223 | struct enable_if<true, _Tp> | |
2224 | { typedef _Tp type; }; | |
2225 | ||
6963c3b9 JW |
2226 | /// @cond undocumented |
2227 | ||
391d5d2e JW |
2228 | // __enable_if_t (std::enable_if_t for C++11) |
2229 | template<bool _Cond, typename _Tp = void> | |
2230 | using __enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2231 | ||
6963c3b9 | 2232 | // Helper for SFINAE constraints |
23df8534 | 2233 | template<typename... _Cond> |
391d5d2e | 2234 | using _Require = __enable_if_t<__and_<_Cond...>::value>; |
123c516a | 2235 | |
6963c3b9 JW |
2236 | // __remove_cvref_t (std::remove_cvref_t for C++11). |
2237 | template<typename _Tp> | |
2238 | using __remove_cvref_t | |
2239 | = typename remove_cv<typename remove_reference<_Tp>::type>::type; | |
2240 | /// @endcond | |
2241 | ||
123c516a | 2242 | // Primary template. |
13901e4b | 2243 | /// Define a member typedef @c type to one of two argument types. |
123c516a PC |
2244 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2245 | struct conditional | |
2246 | { typedef _Iftrue type; }; | |
2247 | ||
2248 | // Partial specialization for false. | |
2249 | template<typename _Iftrue, typename _Iffalse> | |
2250 | struct conditional<false, _Iftrue, _Iffalse> | |
2251 | { typedef _Iffalse type; }; | |
2252 | ||
5b9daa7e | 2253 | /// common_type |
cfa9a96b CF |
2254 | template<typename... _Tp> |
2255 | struct common_type; | |
2256 | ||
c0ffa2ba | 2257 | // Sfinae-friendly common_type implementation: |
b3618b71 | 2258 | |
6963c3b9 | 2259 | /// @cond undocumented |
b3618b71 DK |
2260 | struct __do_common_type_impl |
2261 | { | |
2262 | template<typename _Tp, typename _Up> | |
f61a12b3 JW |
2263 | using __cond_t |
2264 | = decltype(true ? std::declval<_Tp>() : std::declval<_Up>()); | |
2265 | ||
0f8b14ee JW |
2266 | // if decay_t<decltype(false ? declval<D1>() : declval<D2>())> |
2267 | // denotes a valid type, let C denote that type. | |
f61a12b3 | 2268 | template<typename _Tp, typename _Up> |
0f8b14ee | 2269 | static __success_type<__decay_t<__cond_t<_Tp, _Up>>> |
f61a12b3 | 2270 | _S_test(int); |
b3618b71 | 2271 | |
0f8b14ee JW |
2272 | #if __cplusplus > 201703L |
2273 | // Otherwise, if COND-RES(CREF(D1), CREF(D2)) denotes a type, | |
2274 | // let C denote the type decay_t<COND-RES(CREF(D1), CREF(D2))>. | |
2275 | template<typename _Tp, typename _Up> | |
2276 | static __success_type<__remove_cvref_t<__cond_t<const _Tp&, const _Up&>>> | |
2277 | _S_test_2(int); | |
2278 | #endif | |
2279 | ||
b3618b71 | 2280 | template<typename, typename> |
f61a12b3 | 2281 | static __failure_type |
0f8b14ee JW |
2282 | _S_test_2(...); |
2283 | ||
2284 | template<typename _Tp, typename _Up> | |
2285 | static decltype(_S_test_2<_Tp, _Up>(0)) | |
f61a12b3 | 2286 | _S_test(...); |
b3618b71 DK |
2287 | }; |
2288 | ||
f61a12b3 JW |
2289 | // If sizeof...(T) is zero, there shall be no member type. |
2290 | template<> | |
2291 | struct common_type<> | |
2292 | { }; | |
b3618b71 | 2293 | |
f61a12b3 JW |
2294 | // If sizeof...(T) is one, the same type, if any, as common_type_t<T0, T0>. |
2295 | template<typename _Tp0> | |
2296 | struct common_type<_Tp0> | |
2297 | : public common_type<_Tp0, _Tp0> | |
2298 | { }; | |
b3618b71 | 2299 | |
f61a12b3 JW |
2300 | // If sizeof...(T) is two, ... |
2301 | template<typename _Tp1, typename _Tp2, | |
391d5d2e | 2302 | typename _Dp1 = __decay_t<_Tp1>, typename _Dp2 = __decay_t<_Tp2>> |
f61a12b3 | 2303 | struct __common_type_impl |
b3618b71 | 2304 | { |
f61a12b3 JW |
2305 | // If is_same_v<T1, D1> is false or is_same_v<T2, D2> is false, |
2306 | // let C denote the same type, if any, as common_type_t<D1, D2>. | |
2307 | using type = common_type<_Dp1, _Dp2>; | |
b3618b71 DK |
2308 | }; |
2309 | ||
f61a12b3 JW |
2310 | template<typename _Tp1, typename _Tp2> |
2311 | struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2> | |
2312 | : private __do_common_type_impl | |
b3618b71 | 2313 | { |
f61a12b3 JW |
2314 | // Otherwise, if decay_t<decltype(false ? declval<D1>() : declval<D2>())> |
2315 | // denotes a valid type, let C denote that type. | |
2316 | using type = decltype(_S_test<_Tp1, _Tp2>(0)); | |
b3618b71 DK |
2317 | }; |
2318 | ||
f61a12b3 JW |
2319 | // If sizeof...(T) is two, ... |
2320 | template<typename _Tp1, typename _Tp2> | |
2321 | struct common_type<_Tp1, _Tp2> | |
2322 | : public __common_type_impl<_Tp1, _Tp2>::type | |
2323 | { }; | |
b3618b71 | 2324 | |
f61a12b3 JW |
2325 | template<typename...> |
2326 | struct __common_type_pack | |
373c726e JW |
2327 | { }; |
2328 | ||
f61a12b3 JW |
2329 | template<typename, typename, typename = void> |
2330 | struct __common_type_fold; | |
2331 | ||
2332 | // If sizeof...(T) is greater than two, ... | |
2333 | template<typename _Tp1, typename _Tp2, typename... _Rp> | |
2334 | struct common_type<_Tp1, _Tp2, _Rp...> | |
2335 | : public __common_type_fold<common_type<_Tp1, _Tp2>, | |
2336 | __common_type_pack<_Rp...>> | |
373c726e | 2337 | { }; |
cfa9a96b | 2338 | |
f61a12b3 JW |
2339 | // Let C denote the same type, if any, as common_type_t<T1, T2>. |
2340 | // If there is such a type C, type shall denote the same type, if any, | |
2341 | // as common_type_t<C, R...>. | |
2342 | template<typename _CTp, typename... _Rp> | |
2343 | struct __common_type_fold<_CTp, __common_type_pack<_Rp...>, | |
2344 | __void_t<typename _CTp::type>> | |
2345 | : public common_type<typename _CTp::type, _Rp...> | |
b3618b71 | 2346 | { }; |
cfa9a96b | 2347 | |
f61a12b3 JW |
2348 | // Otherwise, there shall be no member type. |
2349 | template<typename _CTp, typename _Rp> | |
2350 | struct __common_type_fold<_CTp, _Rp, void> | |
b3618b71 | 2351 | { }; |
7274deff | 2352 | |
3c26b759 JW |
2353 | template<typename _Tp, bool = is_enum<_Tp>::value> |
2354 | struct __underlying_type_impl | |
2355 | { | |
2356 | using type = __underlying_type(_Tp); | |
2357 | }; | |
2358 | ||
2359 | template<typename _Tp> | |
2360 | struct __underlying_type_impl<_Tp, false> | |
2361 | { }; | |
6963c3b9 | 2362 | /// @endcond |
3c26b759 | 2363 | |
13901e4b | 2364 | /// The underlying type of an enum. |
a47407f6 PC |
2365 | template<typename _Tp> |
2366 | struct underlying_type | |
3c26b759 JW |
2367 | : public __underlying_type_impl<_Tp> |
2368 | { }; | |
123c516a | 2369 | |
6963c3b9 | 2370 | /// @cond undocumented |
7274deff PC |
2371 | template<typename _Tp> |
2372 | struct __declval_protector | |
2373 | { | |
2374 | static const bool __stop = false; | |
7274deff | 2375 | }; |
6963c3b9 | 2376 | /// @endcond |
7274deff | 2377 | |
6963c3b9 JW |
2378 | /** Utility to simplify expressions used in unevaluated operands |
2379 | * @since C++11 | |
2380 | * @ingroup utilities | |
2381 | */ | |
7274deff | 2382 | template<typename _Tp> |
ec26ff5a | 2383 | auto declval() noexcept -> decltype(__declval<_Tp>(0)) |
7274deff PC |
2384 | { |
2385 | static_assert(__declval_protector<_Tp>::__stop, | |
2386 | "declval() must not be used!"); | |
ec26ff5a | 2387 | return __declval<_Tp>(0); |
7274deff | 2388 | } |
1041daba | 2389 | |
be7f7822 JW |
2390 | /// result_of |
2391 | template<typename _Signature> | |
0e5abeb0 | 2392 | struct result_of; |
be7f7822 | 2393 | |
c0ffa2ba | 2394 | // Sfinae-friendly result_of implementation: |
83ddb39f | 2395 | |
a15f7cb8 ESR |
2396 | #define __cpp_lib_result_of_sfinae 201210 |
2397 | ||
6963c3b9 | 2398 | /// @cond undocumented |
93e95400 JW |
2399 | struct __invoke_memfun_ref { }; |
2400 | struct __invoke_memfun_deref { }; | |
2401 | struct __invoke_memobj_ref { }; | |
2402 | struct __invoke_memobj_deref { }; | |
2403 | struct __invoke_other { }; | |
2404 | ||
2405 | // Associate a tag type with a specialization of __success_type. | |
2406 | template<typename _Tp, typename _Tag> | |
2407 | struct __result_of_success : __success_type<_Tp> | |
2408 | { using __invoke_type = _Tag; }; | |
2409 | ||
83ddb39f DK |
2410 | // [func.require] paragraph 1 bullet 1: |
2411 | struct __result_of_memfun_ref_impl | |
2412 | { | |
2413 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2414 | static __result_of_success<decltype( |
83ddb39f | 2415 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2416 | ), __invoke_memfun_ref> _S_test(int); |
83ddb39f DK |
2417 | |
2418 | template<typename...> | |
2419 | static __failure_type _S_test(...); | |
2420 | }; | |
2421 | ||
2422 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2423 | struct __result_of_memfun_ref | |
2424 | : private __result_of_memfun_ref_impl | |
2425 | { | |
2426 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2427 | }; | |
2428 | ||
2429 | // [func.require] paragraph 1 bullet 2: | |
2430 | struct __result_of_memfun_deref_impl | |
2431 | { | |
2432 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2433 | static __result_of_success<decltype( |
83ddb39f | 2434 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2435 | ), __invoke_memfun_deref> _S_test(int); |
83ddb39f DK |
2436 | |
2437 | template<typename...> | |
2438 | static __failure_type _S_test(...); | |
2439 | }; | |
2440 | ||
2441 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2442 | struct __result_of_memfun_deref | |
2443 | : private __result_of_memfun_deref_impl | |
2444 | { | |
2445 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2446 | }; | |
2447 | ||
2448 | // [func.require] paragraph 1 bullet 3: | |
2449 | struct __result_of_memobj_ref_impl | |
2450 | { | |
2451 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2452 | static __result_of_success<decltype( |
83ddb39f | 2453 | std::declval<_Tp1>().*std::declval<_Fp>() |
93e95400 | 2454 | ), __invoke_memobj_ref> _S_test(int); |
83ddb39f DK |
2455 | |
2456 | template<typename, typename> | |
2457 | static __failure_type _S_test(...); | |
2458 | }; | |
2459 | ||
2460 | template<typename _MemPtr, typename _Arg> | |
2461 | struct __result_of_memobj_ref | |
2462 | : private __result_of_memobj_ref_impl | |
2463 | { | |
2464 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2465 | }; | |
2466 | ||
2467 | // [func.require] paragraph 1 bullet 4: | |
2468 | struct __result_of_memobj_deref_impl | |
2469 | { | |
2470 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2471 | static __result_of_success<decltype( |
83ddb39f | 2472 | (*std::declval<_Tp1>()).*std::declval<_Fp>() |
93e95400 | 2473 | ), __invoke_memobj_deref> _S_test(int); |
83ddb39f DK |
2474 | |
2475 | template<typename, typename> | |
2476 | static __failure_type _S_test(...); | |
2477 | }; | |
2478 | ||
be7f7822 | 2479 | template<typename _MemPtr, typename _Arg> |
83ddb39f DK |
2480 | struct __result_of_memobj_deref |
2481 | : private __result_of_memobj_deref_impl | |
2482 | { | |
2483 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2484 | }; | |
2485 | ||
2486 | template<typename _MemPtr, typename _Arg> | |
2487 | struct __result_of_memobj; | |
be7f7822 JW |
2488 | |
2489 | template<typename _Res, typename _Class, typename _Arg> | |
83ddb39f | 2490 | struct __result_of_memobj<_Res _Class::*, _Arg> |
be7f7822 | 2491 | { |
6791489e | 2492 | typedef __remove_cvref_t<_Arg> _Argval; |
83ddb39f DK |
2493 | typedef _Res _Class::* _MemPtr; |
2494 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2495 | is_base_of<_Class, _Argval>>::value, | |
2496 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2497 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2498 | >::type::type type; | |
be7f7822 JW |
2499 | }; |
2500 | ||
83ddb39f DK |
2501 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2502 | struct __result_of_memfun; | |
be7f7822 JW |
2503 | |
2504 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
83ddb39f | 2505 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
be7f7822 | 2506 | { |
81c7cf71 | 2507 | typedef typename remove_reference<_Arg>::type _Argval; |
83ddb39f | 2508 | typedef _Res _Class::* _MemPtr; |
81c7cf71 | 2509 | typedef typename conditional<is_base_of<_Class, _Argval>::value, |
83ddb39f DK |
2510 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, |
2511 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2512 | >::type::type type; | |
be7f7822 JW |
2513 | }; |
2514 | ||
93e95400 JW |
2515 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2516 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper | |
2517 | // as the object expression | |
93e95400 | 2518 | |
7dcc645c | 2519 | // Used by result_of, invoke etc. to unwrap a reference_wrapper. |
81c7cf71 | 2520 | template<typename _Tp, typename _Up = __remove_cvref_t<_Tp>> |
7dcc645c JW |
2521 | struct __inv_unwrap |
2522 | { | |
2523 | using type = _Tp; | |
2524 | }; | |
f3d7dd52 | 2525 | |
7dcc645c JW |
2526 | template<typename _Tp, typename _Up> |
2527 | struct __inv_unwrap<_Tp, reference_wrapper<_Up>> | |
2528 | { | |
2529 | using type = _Up&; | |
2530 | }; | |
93e95400 | 2531 | |
be7f7822 | 2532 | template<bool, bool, typename _Functor, typename... _ArgTypes> |
83ddb39f | 2533 | struct __result_of_impl |
be7f7822 | 2534 | { |
83ddb39f | 2535 | typedef __failure_type type; |
be7f7822 JW |
2536 | }; |
2537 | ||
2538 | template<typename _MemPtr, typename _Arg> | |
83ddb39f | 2539 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
391d5d2e | 2540 | : public __result_of_memobj<__decay_t<_MemPtr>, |
7dcc645c | 2541 | typename __inv_unwrap<_Arg>::type> |
c4db9a77 | 2542 | { }; |
be7f7822 | 2543 | |
83ddb39f DK |
2544 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2545 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
391d5d2e | 2546 | : public __result_of_memfun<__decay_t<_MemPtr>, |
7dcc645c | 2547 | typename __inv_unwrap<_Arg>::type, _Args...> |
c4db9a77 | 2548 | { }; |
be7f7822 | 2549 | |
83ddb39f DK |
2550 | // [func.require] paragraph 1 bullet 5: |
2551 | struct __result_of_other_impl | |
2552 | { | |
2553 | template<typename _Fn, typename... _Args> | |
93e95400 | 2554 | static __result_of_success<decltype( |
83ddb39f | 2555 | std::declval<_Fn>()(std::declval<_Args>()...) |
93e95400 | 2556 | ), __invoke_other> _S_test(int); |
83ddb39f DK |
2557 | |
2558 | template<typename...> | |
2559 | static __failure_type _S_test(...); | |
2560 | }; | |
2561 | ||
be7f7822 | 2562 | template<typename _Functor, typename... _ArgTypes> |
83ddb39f DK |
2563 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2564 | : private __result_of_other_impl | |
be7f7822 | 2565 | { |
83ddb39f | 2566 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
be7f7822 JW |
2567 | }; |
2568 | ||
7dcc645c | 2569 | // __invoke_result (std::invoke_result for C++11) |
83ddb39f | 2570 | template<typename _Functor, typename... _ArgTypes> |
7dcc645c | 2571 | struct __invoke_result |
83ddb39f DK |
2572 | : public __result_of_impl< |
2573 | is_member_object_pointer< | |
2574 | typename remove_reference<_Functor>::type | |
2575 | >::value, | |
2576 | is_member_function_pointer< | |
2577 | typename remove_reference<_Functor>::type | |
2578 | >::value, | |
7dcc645c | 2579 | _Functor, _ArgTypes... |
83ddb39f DK |
2580 | >::type |
2581 | { }; | |
6963c3b9 | 2582 | /// @endcond |
c0ffa2ba | 2583 | |
7dcc645c JW |
2584 | template<typename _Functor, typename... _ArgTypes> |
2585 | struct result_of<_Functor(_ArgTypes...)> | |
2586 | : public __invoke_result<_Functor, _ArgTypes...> | |
2587 | { }; | |
2588 | ||
e112d53a | 2589 | #if __cplusplus >= 201402L |
4457e88c JW |
2590 | /// Alias template for aligned_storage |
2591 | template<size_t _Len, size_t _Align = | |
2592 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2593 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2594 | ||
d3718027 RS |
2595 | template <size_t _Len, typename... _Types> |
2596 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2597 | ||
4457e88c JW |
2598 | /// Alias template for decay |
2599 | template<typename _Tp> | |
2600 | using decay_t = typename decay<_Tp>::type; | |
2601 | ||
2602 | /// Alias template for enable_if | |
2603 | template<bool _Cond, typename _Tp = void> | |
2604 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2605 | ||
2606 | /// Alias template for conditional | |
2607 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2608 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2609 | ||
2610 | /// Alias template for common_type | |
2611 | template<typename... _Tp> | |
2612 | using common_type_t = typename common_type<_Tp...>::type; | |
2613 | ||
2614 | /// Alias template for underlying_type | |
2615 | template<typename _Tp> | |
2616 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2617 | ||
2618 | /// Alias template for result_of | |
2619 | template<typename _Tp> | |
2620 | using result_of_t = typename result_of<_Tp>::type; | |
e112d53a JW |
2621 | #endif // C++14 |
2622 | ||
e112d53a | 2623 | #if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11 |
bd1eb5e0 JW |
2624 | #define __cpp_lib_void_t 201411 |
2625 | /// A metafunction that always yields void, used for detecting valid types. | |
2626 | template<typename...> using void_t = void; | |
2627 | #endif | |
2628 | ||
6963c3b9 JW |
2629 | /// @cond undocumented |
2630 | ||
6af6bef4 JW |
2631 | /// Implementation of the detection idiom (negative case). |
2632 | template<typename _Default, typename _AlwaysVoid, | |
2633 | template<typename...> class _Op, typename... _Args> | |
2634 | struct __detector | |
2635 | { | |
2636 | using value_t = false_type; | |
2637 | using type = _Default; | |
2638 | }; | |
2639 | ||
2640 | /// Implementation of the detection idiom (positive case). | |
2641 | template<typename _Default, template<typename...> class _Op, | |
2642 | typename... _Args> | |
2643 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2644 | { | |
2645 | using value_t = true_type; | |
2646 | using type = _Op<_Args...>; | |
2647 | }; | |
2648 | ||
2649 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2650 | template<typename _Default, template<typename...> class _Op, | |
2651 | typename... _Args> | |
2652 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2653 | ||
2654 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2655 | template<typename _Default, template<typename...> class _Op, | |
2656 | typename... _Args> | |
2657 | using __detected_or_t | |
2658 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2659 | ||
033b71ce PC |
2660 | /** |
2661 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2662 | * member type _NTYPE. | |
2663 | */ | |
82b12c4b | 2664 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
847e9cf8 | 2665 | template<typename _Tp, typename = __void_t<>> \ |
82b12c4b | 2666 | struct __has_##_NTYPE \ |
847e9cf8 JW |
2667 | : false_type \ |
2668 | { }; \ | |
2669 | template<typename _Tp> \ | |
2670 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2671 | : true_type \ | |
033b71ce PC |
2672 | { }; |
2673 | ||
26b5ace7 DK |
2674 | template <typename _Tp> |
2675 | struct __is_swappable; | |
ddb63209 | 2676 | |
26b5ace7 DK |
2677 | template <typename _Tp> |
2678 | struct __is_nothrow_swappable; | |
ddb63209 | 2679 | |
a2863bde VV |
2680 | template<typename> |
2681 | struct __is_tuple_like_impl : false_type | |
2682 | { }; | |
2683 | ||
a2863bde VV |
2684 | // Internal type trait that allows us to sfinae-protect tuple_cat. |
2685 | template<typename _Tp> | |
2686 | struct __is_tuple_like | |
6791489e | 2687 | : public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type |
a2863bde | 2688 | { }; |
6963c3b9 | 2689 | /// @endcond |
a2863bde | 2690 | |
ddb63209 | 2691 | template<typename _Tp> |
7a91c710 | 2692 | _GLIBCXX20_CONSTEXPR |
ddb63209 | 2693 | inline |
391d5d2e JW |
2694 | _Require<__not_<__is_tuple_like<_Tp>>, |
2695 | is_move_constructible<_Tp>, | |
2696 | is_move_assignable<_Tp>> | |
ddb63209 VV |
2697 | swap(_Tp&, _Tp&) |
2698 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2699 | is_nothrow_move_assignable<_Tp>>::value); | |
2700 | ||
2701 | template<typename _Tp, size_t _Nm> | |
7a91c710 | 2702 | _GLIBCXX20_CONSTEXPR |
ddb63209 | 2703 | inline |
391d5d2e | 2704 | __enable_if_t<__is_swappable<_Tp>::value> |
ddb63209 | 2705 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) |
26b5ace7 | 2706 | noexcept(__is_nothrow_swappable<_Tp>::value); |
ddb63209 | 2707 | |
6963c3b9 | 2708 | /// @cond undocumented |
26b5ace7 | 2709 | namespace __swappable_details { |
ddb63209 VV |
2710 | using std::swap; |
2711 | ||
26b5ace7 DK |
2712 | struct __do_is_swappable_impl |
2713 | { | |
2714 | template<typename _Tp, typename | |
2715 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> | |
2716 | static true_type __test(int); | |
2717 | ||
2718 | template<typename> | |
2719 | static false_type __test(...); | |
2720 | }; | |
2721 | ||
2722 | struct __do_is_nothrow_swappable_impl | |
2723 | { | |
2724 | template<typename _Tp> | |
2725 | static __bool_constant< | |
2726 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) | |
2727 | > __test(int); | |
2728 | ||
2729 | template<typename> | |
2730 | static false_type __test(...); | |
2731 | }; | |
2732 | ||
6b9539e2 | 2733 | } // namespace __swappable_details |
ddb63209 | 2734 | |
26b5ace7 DK |
2735 | template<typename _Tp> |
2736 | struct __is_swappable_impl | |
2737 | : public __swappable_details::__do_is_swappable_impl | |
2738 | { | |
2739 | typedef decltype(__test<_Tp>(0)) type; | |
2740 | }; | |
2741 | ||
2742 | template<typename _Tp> | |
ddb63209 | 2743 | struct __is_nothrow_swappable_impl |
26b5ace7 DK |
2744 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2745 | { | |
2746 | typedef decltype(__test<_Tp>(0)) type; | |
2747 | }; | |
ddb63209 | 2748 | |
26b5ace7 DK |
2749 | template<typename _Tp> |
2750 | struct __is_swappable | |
2751 | : public __is_swappable_impl<_Tp>::type | |
ddb63209 VV |
2752 | { }; |
2753 | ||
26b5ace7 | 2754 | template<typename _Tp> |
ddb63209 | 2755 | struct __is_nothrow_swappable |
26b5ace7 | 2756 | : public __is_nothrow_swappable_impl<_Tp>::type |
ddb63209 | 2757 | { }; |
6963c3b9 | 2758 | /// @endcond |
ddb63209 | 2759 | |
6b9539e2 DK |
2760 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2761 | #define __cpp_lib_is_swappable 201603 | |
2762 | /// Metafunctions used for detecting swappable types: p0185r1 | |
2763 | ||
2764 | /// is_swappable | |
2765 | template<typename _Tp> | |
2766 | struct is_swappable | |
2767 | : public __is_swappable_impl<_Tp>::type | |
608a080c AP |
2768 | { |
2769 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2770 | "template argument must be a complete class or an unbounded array"); | |
2771 | }; | |
6b9539e2 DK |
2772 | |
2773 | /// is_nothrow_swappable | |
2774 | template<typename _Tp> | |
2775 | struct is_nothrow_swappable | |
2776 | : public __is_nothrow_swappable_impl<_Tp>::type | |
608a080c AP |
2777 | { |
2778 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2779 | "template argument must be a complete class or an unbounded array"); | |
2780 | }; | |
6b9539e2 DK |
2781 | |
2782 | #if __cplusplus >= 201402L | |
2783 | /// is_swappable_v | |
2784 | template<typename _Tp> | |
288695f7 DK |
2785 | _GLIBCXX17_INLINE constexpr bool is_swappable_v = |
2786 | is_swappable<_Tp>::value; | |
6b9539e2 DK |
2787 | |
2788 | /// is_nothrow_swappable_v | |
2789 | template<typename _Tp> | |
288695f7 DK |
2790 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v = |
2791 | is_nothrow_swappable<_Tp>::value; | |
6b9539e2 DK |
2792 | #endif // __cplusplus >= 201402L |
2793 | ||
6963c3b9 | 2794 | /// @cond undocumented |
6b9539e2 DK |
2795 | namespace __swappable_with_details { |
2796 | using std::swap; | |
2797 | ||
2798 | struct __do_is_swappable_with_impl | |
2799 | { | |
2800 | template<typename _Tp, typename _Up, typename | |
2801 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), | |
2802 | typename | |
2803 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> | |
2804 | static true_type __test(int); | |
2805 | ||
2806 | template<typename, typename> | |
2807 | static false_type __test(...); | |
2808 | }; | |
2809 | ||
2810 | struct __do_is_nothrow_swappable_with_impl | |
2811 | { | |
2812 | template<typename _Tp, typename _Up> | |
2813 | static __bool_constant< | |
2814 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) | |
2815 | && | |
2816 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) | |
2817 | > __test(int); | |
2818 | ||
2819 | template<typename, typename> | |
2820 | static false_type __test(...); | |
2821 | }; | |
2822 | ||
2823 | } // namespace __swappable_with_details | |
2824 | ||
2825 | template<typename _Tp, typename _Up> | |
2826 | struct __is_swappable_with_impl | |
2827 | : public __swappable_with_details::__do_is_swappable_with_impl | |
2828 | { | |
2829 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2830 | }; | |
2831 | ||
2832 | // Optimization for the homogenous lvalue case, not required: | |
2833 | template<typename _Tp> | |
2834 | struct __is_swappable_with_impl<_Tp&, _Tp&> | |
2835 | : public __swappable_details::__do_is_swappable_impl | |
2836 | { | |
2837 | typedef decltype(__test<_Tp&>(0)) type; | |
2838 | }; | |
2839 | ||
2840 | template<typename _Tp, typename _Up> | |
2841 | struct __is_nothrow_swappable_with_impl | |
2842 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl | |
2843 | { | |
2844 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2845 | }; | |
2846 | ||
2847 | // Optimization for the homogenous lvalue case, not required: | |
2848 | template<typename _Tp> | |
2849 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> | |
2850 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2851 | { | |
2852 | typedef decltype(__test<_Tp&>(0)) type; | |
2853 | }; | |
6963c3b9 | 2854 | /// @endcond |
6b9539e2 DK |
2855 | |
2856 | /// is_swappable_with | |
2857 | template<typename _Tp, typename _Up> | |
2858 | struct is_swappable_with | |
2859 | : public __is_swappable_with_impl<_Tp, _Up>::type | |
69f571ff AP |
2860 | { |
2861 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2862 | "first template argument must be a complete class or an unbounded array"); | |
2863 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}), | |
2864 | "second template argument must be a complete class or an unbounded array"); | |
2865 | }; | |
6b9539e2 DK |
2866 | |
2867 | /// is_nothrow_swappable_with | |
2868 | template<typename _Tp, typename _Up> | |
2869 | struct is_nothrow_swappable_with | |
2870 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type | |
69f571ff AP |
2871 | { |
2872 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
2873 | "first template argument must be a complete class or an unbounded array"); | |
2874 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}), | |
2875 | "second template argument must be a complete class or an unbounded array"); | |
2876 | }; | |
6b9539e2 DK |
2877 | |
2878 | #if __cplusplus >= 201402L | |
2879 | /// is_swappable_with_v | |
2880 | template<typename _Tp, typename _Up> | |
288695f7 DK |
2881 | _GLIBCXX17_INLINE constexpr bool is_swappable_with_v = |
2882 | is_swappable_with<_Tp, _Up>::value; | |
6b9539e2 DK |
2883 | |
2884 | /// is_nothrow_swappable_with_v | |
2885 | template<typename _Tp, typename _Up> | |
288695f7 | 2886 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v = |
6b9539e2 DK |
2887 | is_nothrow_swappable_with<_Tp, _Up>::value; |
2888 | #endif // __cplusplus >= 201402L | |
137422c8 | 2889 | |
42183d03 JW |
2890 | #endif// c++1z or gnu++11 |
2891 | ||
6963c3b9 JW |
2892 | /// @cond undocumented |
2893 | ||
7dcc645c | 2894 | // __is_invocable (std::is_invocable for C++11) |
42183d03 | 2895 | |
d91f618d JW |
2896 | // The primary template is used for invalid INVOKE expressions. |
2897 | template<typename _Result, typename _Ret, | |
2898 | bool = is_void<_Ret>::value, typename = void> | |
7dcc645c | 2899 | struct __is_invocable_impl : false_type { }; |
42183d03 | 2900 | |
d91f618d | 2901 | // Used for valid INVOKE and INVOKE<void> expressions. |
42183d03 | 2902 | template<typename _Result, typename _Ret> |
d91f618d JW |
2903 | struct __is_invocable_impl<_Result, _Ret, |
2904 | /* is_void<_Ret> = */ true, | |
2905 | __void_t<typename _Result::type>> | |
2906 | : true_type | |
42183d03 JW |
2907 | { }; |
2908 | ||
d91f618d JW |
2909 | #pragma GCC diagnostic push |
2910 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
2911 | // Used for INVOKE<R> expressions to check the implicit conversion to R. | |
2912 | template<typename _Result, typename _Ret> | |
2913 | struct __is_invocable_impl<_Result, _Ret, | |
2914 | /* is_void<_Ret> = */ false, | |
2915 | __void_t<typename _Result::type>> | |
2916 | { | |
2917 | private: | |
2918 | // The type of the INVOKE expression. | |
2919 | // Unlike declval, this doesn't add_rvalue_reference. | |
2920 | static typename _Result::type _S_get(); | |
2921 | ||
2922 | template<typename _Tp> | |
2923 | static void _S_conv(_Tp); | |
2924 | ||
2925 | // This overload is viable if INVOKE(f, args...) can convert to _Tp. | |
2926 | template<typename _Tp, typename = decltype(_S_conv<_Tp>(_S_get()))> | |
2927 | static true_type | |
2928 | _S_test(int); | |
2929 | ||
2930 | template<typename _Tp> | |
2931 | static false_type | |
2932 | _S_test(...); | |
2933 | ||
2934 | public: | |
2935 | using type = decltype(_S_test<_Ret>(1)); | |
2936 | }; | |
2937 | #pragma GCC diagnostic pop | |
2938 | ||
7dcc645c JW |
2939 | template<typename _Fn, typename... _ArgTypes> |
2940 | struct __is_invocable | |
2941 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
42183d03 JW |
2942 | { }; |
2943 | ||
42183d03 JW |
2944 | template<typename _Fn, typename _Tp, typename... _Args> |
2945 | constexpr bool __call_is_nt(__invoke_memfun_ref) | |
2946 | { | |
2947 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2948 | return noexcept((std::declval<_Up>().*std::declval<_Fn>())( | |
2949 | std::declval<_Args>()...)); | |
2950 | } | |
2951 | ||
2952 | template<typename _Fn, typename _Tp, typename... _Args> | |
2953 | constexpr bool __call_is_nt(__invoke_memfun_deref) | |
2954 | { | |
2955 | return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())( | |
2956 | std::declval<_Args>()...)); | |
2957 | } | |
2958 | ||
2959 | template<typename _Fn, typename _Tp> | |
2960 | constexpr bool __call_is_nt(__invoke_memobj_ref) | |
2961 | { | |
2962 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2963 | return noexcept(std::declval<_Up>().*std::declval<_Fn>()); | |
2964 | } | |
2965 | ||
2966 | template<typename _Fn, typename _Tp> | |
2967 | constexpr bool __call_is_nt(__invoke_memobj_deref) | |
2968 | { | |
2969 | return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>()); | |
2970 | } | |
2971 | ||
2972 | template<typename _Fn, typename... _Args> | |
2973 | constexpr bool __call_is_nt(__invoke_other) | |
2974 | { | |
2975 | return noexcept(std::declval<_Fn>()(std::declval<_Args>()...)); | |
2976 | } | |
2977 | ||
7dcc645c | 2978 | template<typename _Result, typename _Fn, typename... _Args> |
42183d03 JW |
2979 | struct __call_is_nothrow |
2980 | : __bool_constant< | |
7dcc645c JW |
2981 | std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{}) |
2982 | > | |
42183d03 JW |
2983 | { }; |
2984 | ||
7dcc645c JW |
2985 | template<typename _Fn, typename... _Args> |
2986 | using __call_is_nothrow_ | |
2987 | = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>; | |
42183d03 | 2988 | |
7dcc645c JW |
2989 | // __is_nothrow_invocable (std::is_nothrow_invocable for C++11) |
2990 | template<typename _Fn, typename... _Args> | |
2991 | struct __is_nothrow_invocable | |
2992 | : __and_<__is_invocable<_Fn, _Args...>, | |
2993 | __call_is_nothrow_<_Fn, _Args...>>::type | |
42183d03 JW |
2994 | { }; |
2995 | ||
cc28d234 JW |
2996 | #pragma GCC diagnostic push |
2997 | #pragma GCC diagnostic ignored "-Wctor-dtor-privacy" | |
a73d2fa8 NDR |
2998 | struct __nonesuchbase {}; |
2999 | struct __nonesuch : private __nonesuchbase { | |
f524d5b3 VV |
3000 | ~__nonesuch() = delete; |
3001 | __nonesuch(__nonesuch const&) = delete; | |
3002 | void operator=(__nonesuch const&) = delete; | |
3003 | }; | |
cc28d234 | 3004 | #pragma GCC diagnostic pop |
6963c3b9 | 3005 | /// @endcond |
f524d5b3 | 3006 | |
e641ee43 | 3007 | #if __cplusplus >= 201703L |
7dcc645c JW |
3008 | # define __cpp_lib_is_invocable 201703 |
3009 | ||
3010 | /// std::invoke_result | |
3011 | template<typename _Functor, typename... _ArgTypes> | |
3012 | struct invoke_result | |
3013 | : public __invoke_result<_Functor, _ArgTypes...> | |
69f571ff AP |
3014 | { |
3015 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Functor>{}), | |
3016 | "_Functor must be a complete class or an unbounded array"); | |
c1fc9f6e AP |
3017 | static_assert((std::__is_complete_or_unbounded( |
3018 | __type_identity<_ArgTypes>{}) && ...), | |
3019 | "each argument type must be a complete class or an unbounded array"); | |
69f571ff | 3020 | }; |
7dcc645c JW |
3021 | |
3022 | /// std::invoke_result_t | |
3023 | template<typename _Fn, typename... _Args> | |
3024 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; | |
42183d03 | 3025 | |
7dcc645c JW |
3026 | /// std::is_invocable |
3027 | template<typename _Fn, typename... _ArgTypes> | |
3028 | struct is_invocable | |
3029 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
608a080c AP |
3030 | { |
3031 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
3032 | "_Fn must be a complete class or an unbounded array"); | |
c1fc9f6e AP |
3033 | static_assert((std::__is_complete_or_unbounded( |
3034 | __type_identity<_ArgTypes>{}) && ...), | |
3035 | "each argument type must be a complete class or an unbounded array"); | |
608a080c | 3036 | }; |
42183d03 | 3037 | |
7dcc645c JW |
3038 | /// std::is_invocable_r |
3039 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
3040 | struct is_invocable_r | |
3041 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type | |
608a080c AP |
3042 | { |
3043 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
3044 | "_Fn must be a complete class or an unbounded array"); | |
c1fc9f6e AP |
3045 | static_assert((std::__is_complete_or_unbounded( |
3046 | __type_identity<_ArgTypes>{}) && ...), | |
3047 | "each argument type must be a complete class or an unbounded array"); | |
3048 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}), | |
3049 | "_Ret must be a complete class or an unbounded array"); | |
608a080c | 3050 | }; |
42183d03 | 3051 | |
7dcc645c JW |
3052 | /// std::is_nothrow_invocable |
3053 | template<typename _Fn, typename... _ArgTypes> | |
3054 | struct is_nothrow_invocable | |
3055 | : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>, | |
608a080c AP |
3056 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
3057 | { | |
3058 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
3059 | "_Fn must be a complete class or an unbounded array"); | |
c1fc9f6e AP |
3060 | static_assert((std::__is_complete_or_unbounded( |
3061 | __type_identity<_ArgTypes>{}) && ...), | |
3062 | "each argument type must be a complete class or an unbounded array"); | |
608a080c | 3063 | }; |
42183d03 | 3064 | |
6963c3b9 | 3065 | /// @cond undocumented |
c4b06e7f JW |
3066 | template<typename _Result, typename _Ret, typename = void> |
3067 | struct __is_nt_invocable_impl : false_type { }; | |
3068 | ||
3069 | template<typename _Result, typename _Ret> | |
3070 | struct __is_nt_invocable_impl<_Result, _Ret, | |
3071 | __void_t<typename _Result::type>> | |
91d01b33 | 3072 | : __or_<is_void<_Ret>, |
ce9f305e | 3073 | __is_nothrow_convertible<typename _Result::type, _Ret>> |
c4b06e7f | 3074 | { }; |
6963c3b9 | 3075 | /// @endcond |
c4b06e7f | 3076 | |
7dcc645c JW |
3077 | /// std::is_nothrow_invocable_r |
3078 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
3079 | struct is_nothrow_invocable_r | |
c4b06e7f | 3080 | : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>, |
7dcc645c | 3081 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
69f571ff AP |
3082 | { |
3083 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}), | |
3084 | "_Fn must be a complete class or an unbounded array"); | |
c1fc9f6e AP |
3085 | static_assert((std::__is_complete_or_unbounded( |
3086 | __type_identity<_ArgTypes>{}) && ...), | |
3087 | "each argument type must be a complete class or an unbounded array"); | |
3088 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}), | |
3089 | "_Ret must be a complete class or an unbounded array"); | |
69f571ff | 3090 | }; |
7dcc645c | 3091 | #endif // C++17 |
42183d03 | 3092 | |
e641ee43 | 3093 | #if __cplusplus >= 201703L |
068c8ac1 | 3094 | # define __cpp_lib_type_trait_variable_templates 201510L |
6963c3b9 | 3095 | /** |
da89dfc2 | 3096 | * @defgroup variable_templates Variable templates for type traits |
6963c3b9 JW |
3097 | * @ingroup metaprogramming |
3098 | * | |
da89dfc2 JW |
3099 | * Each variable `is_xxx_v<T>` is a boolean constant with the same value |
3100 | * as the `value` member of the corresponding type trait `is_xxx<T>`. | |
6963c3b9 | 3101 | * |
aba938d6 | 3102 | * @since C++17 unless noted otherwise. |
6963c3b9 JW |
3103 | */ |
3104 | ||
da89dfc2 | 3105 | /** |
6963c3b9 | 3106 | * @{ |
da89dfc2 | 3107 | * @ingroup variable_templates |
6963c3b9 | 3108 | */ |
137422c8 | 3109 | template <typename _Tp> |
288695f7 | 3110 | inline constexpr bool is_void_v = is_void<_Tp>::value; |
137422c8 | 3111 | template <typename _Tp> |
288695f7 | 3112 | inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; |
137422c8 | 3113 | template <typename _Tp> |
288695f7 | 3114 | inline constexpr bool is_integral_v = is_integral<_Tp>::value; |
137422c8 | 3115 | template <typename _Tp> |
288695f7 | 3116 | inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; |
137422c8 | 3117 | template <typename _Tp> |
288695f7 | 3118 | inline constexpr bool is_array_v = is_array<_Tp>::value; |
137422c8 | 3119 | template <typename _Tp> |
288695f7 | 3120 | inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |
137422c8 | 3121 | template <typename _Tp> |
288695f7 DK |
3122 | inline constexpr bool is_lvalue_reference_v = |
3123 | is_lvalue_reference<_Tp>::value; | |
137422c8 | 3124 | template <typename _Tp> |
288695f7 DK |
3125 | inline constexpr bool is_rvalue_reference_v = |
3126 | is_rvalue_reference<_Tp>::value; | |
137422c8 | 3127 | template <typename _Tp> |
288695f7 | 3128 | inline constexpr bool is_member_object_pointer_v = |
137422c8 VV |
3129 | is_member_object_pointer<_Tp>::value; |
3130 | template <typename _Tp> | |
288695f7 | 3131 | inline constexpr bool is_member_function_pointer_v = |
137422c8 VV |
3132 | is_member_function_pointer<_Tp>::value; |
3133 | template <typename _Tp> | |
288695f7 | 3134 | inline constexpr bool is_enum_v = is_enum<_Tp>::value; |
137422c8 | 3135 | template <typename _Tp> |
288695f7 | 3136 | inline constexpr bool is_union_v = is_union<_Tp>::value; |
137422c8 | 3137 | template <typename _Tp> |
288695f7 | 3138 | inline constexpr bool is_class_v = is_class<_Tp>::value; |
137422c8 | 3139 | template <typename _Tp> |
288695f7 | 3140 | inline constexpr bool is_function_v = is_function<_Tp>::value; |
137422c8 | 3141 | template <typename _Tp> |
288695f7 | 3142 | inline constexpr bool is_reference_v = is_reference<_Tp>::value; |
137422c8 | 3143 | template <typename _Tp> |
288695f7 | 3144 | inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; |
137422c8 | 3145 | template <typename _Tp> |
288695f7 | 3146 | inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; |
137422c8 | 3147 | template <typename _Tp> |
288695f7 | 3148 | inline constexpr bool is_object_v = is_object<_Tp>::value; |
137422c8 | 3149 | template <typename _Tp> |
288695f7 | 3150 | inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
137422c8 | 3151 | template <typename _Tp> |
288695f7 | 3152 | inline constexpr bool is_compound_v = is_compound<_Tp>::value; |
137422c8 | 3153 | template <typename _Tp> |
288695f7 | 3154 | inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; |
137422c8 | 3155 | template <typename _Tp> |
288695f7 | 3156 | inline constexpr bool is_const_v = is_const<_Tp>::value; |
137422c8 | 3157 | template <typename _Tp> |
288695f7 | 3158 | inline constexpr bool is_volatile_v = is_volatile<_Tp>::value; |
137422c8 | 3159 | template <typename _Tp> |
288695f7 | 3160 | inline constexpr bool is_trivial_v = is_trivial<_Tp>::value; |
137422c8 | 3161 | template <typename _Tp> |
288695f7 DK |
3162 | inline constexpr bool is_trivially_copyable_v = |
3163 | is_trivially_copyable<_Tp>::value; | |
137422c8 | 3164 | template <typename _Tp> |
288695f7 | 3165 | inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; |
caa39b2e JW |
3166 | #pragma GCC diagnostic push |
3167 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" | |
137422c8 | 3168 | template <typename _Tp> |
1a6c5064 | 3169 | _GLIBCXX20_DEPRECATED("use is_standard_layout_v && is_trivial_v instead") |
288695f7 | 3170 | inline constexpr bool is_pod_v = is_pod<_Tp>::value; |
137422c8 | 3171 | template <typename _Tp> |
24b54628 | 3172 | _GLIBCXX17_DEPRECATED |
288695f7 | 3173 | inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; |
24b54628 VV |
3174 | #pragma GCC diagnostic pop |
3175 | template <typename _Tp> | |
288695f7 | 3176 | inline constexpr bool is_empty_v = is_empty<_Tp>::value; |
137422c8 | 3177 | template <typename _Tp> |
288695f7 | 3178 | inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; |
137422c8 | 3179 | template <typename _Tp> |
288695f7 | 3180 | inline constexpr bool is_abstract_v = is_abstract<_Tp>::value; |
137422c8 | 3181 | template <typename _Tp> |
288695f7 | 3182 | inline constexpr bool is_final_v = is_final<_Tp>::value; |
137422c8 | 3183 | template <typename _Tp> |
288695f7 | 3184 | inline constexpr bool is_signed_v = is_signed<_Tp>::value; |
137422c8 | 3185 | template <typename _Tp> |
288695f7 | 3186 | inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; |
137422c8 | 3187 | template <typename _Tp, typename... _Args> |
288695f7 DK |
3188 | inline constexpr bool is_constructible_v = |
3189 | is_constructible<_Tp, _Args...>::value; | |
137422c8 | 3190 | template <typename _Tp> |
288695f7 | 3191 | inline constexpr bool is_default_constructible_v = |
137422c8 VV |
3192 | is_default_constructible<_Tp>::value; |
3193 | template <typename _Tp> | |
288695f7 DK |
3194 | inline constexpr bool is_copy_constructible_v = |
3195 | is_copy_constructible<_Tp>::value; | |
137422c8 | 3196 | template <typename _Tp> |
288695f7 DK |
3197 | inline constexpr bool is_move_constructible_v = |
3198 | is_move_constructible<_Tp>::value; | |
137422c8 | 3199 | template <typename _Tp, typename _Up> |
288695f7 | 3200 | inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; |
137422c8 | 3201 | template <typename _Tp> |
288695f7 | 3202 | inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; |
137422c8 | 3203 | template <typename _Tp> |
288695f7 | 3204 | inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; |
137422c8 | 3205 | template <typename _Tp> |
288695f7 | 3206 | inline constexpr bool is_destructible_v = is_destructible<_Tp>::value; |
137422c8 | 3207 | template <typename _Tp, typename... _Args> |
288695f7 | 3208 | inline constexpr bool is_trivially_constructible_v = |
137422c8 VV |
3209 | is_trivially_constructible<_Tp, _Args...>::value; |
3210 | template <typename _Tp> | |
288695f7 | 3211 | inline constexpr bool is_trivially_default_constructible_v = |
137422c8 VV |
3212 | is_trivially_default_constructible<_Tp>::value; |
3213 | template <typename _Tp> | |
288695f7 | 3214 | inline constexpr bool is_trivially_copy_constructible_v = |
137422c8 VV |
3215 | is_trivially_copy_constructible<_Tp>::value; |
3216 | template <typename _Tp> | |
288695f7 | 3217 | inline constexpr bool is_trivially_move_constructible_v = |
137422c8 VV |
3218 | is_trivially_move_constructible<_Tp>::value; |
3219 | template <typename _Tp, typename _Up> | |
288695f7 | 3220 | inline constexpr bool is_trivially_assignable_v = |
137422c8 VV |
3221 | is_trivially_assignable<_Tp, _Up>::value; |
3222 | template <typename _Tp> | |
288695f7 | 3223 | inline constexpr bool is_trivially_copy_assignable_v = |
137422c8 VV |
3224 | is_trivially_copy_assignable<_Tp>::value; |
3225 | template <typename _Tp> | |
288695f7 | 3226 | inline constexpr bool is_trivially_move_assignable_v = |
137422c8 VV |
3227 | is_trivially_move_assignable<_Tp>::value; |
3228 | template <typename _Tp> | |
288695f7 | 3229 | inline constexpr bool is_trivially_destructible_v = |
137422c8 VV |
3230 | is_trivially_destructible<_Tp>::value; |
3231 | template <typename _Tp, typename... _Args> | |
288695f7 | 3232 | inline constexpr bool is_nothrow_constructible_v = |
137422c8 VV |
3233 | is_nothrow_constructible<_Tp, _Args...>::value; |
3234 | template <typename _Tp> | |
288695f7 | 3235 | inline constexpr bool is_nothrow_default_constructible_v = |
137422c8 VV |
3236 | is_nothrow_default_constructible<_Tp>::value; |
3237 | template <typename _Tp> | |
288695f7 | 3238 | inline constexpr bool is_nothrow_copy_constructible_v = |
137422c8 VV |
3239 | is_nothrow_copy_constructible<_Tp>::value; |
3240 | template <typename _Tp> | |
288695f7 | 3241 | inline constexpr bool is_nothrow_move_constructible_v = |
137422c8 VV |
3242 | is_nothrow_move_constructible<_Tp>::value; |
3243 | template <typename _Tp, typename _Up> | |
288695f7 | 3244 | inline constexpr bool is_nothrow_assignable_v = |
137422c8 VV |
3245 | is_nothrow_assignable<_Tp, _Up>::value; |
3246 | template <typename _Tp> | |
288695f7 | 3247 | inline constexpr bool is_nothrow_copy_assignable_v = |
137422c8 VV |
3248 | is_nothrow_copy_assignable<_Tp>::value; |
3249 | template <typename _Tp> | |
288695f7 | 3250 | inline constexpr bool is_nothrow_move_assignable_v = |
137422c8 VV |
3251 | is_nothrow_move_assignable<_Tp>::value; |
3252 | template <typename _Tp> | |
288695f7 | 3253 | inline constexpr bool is_nothrow_destructible_v = |
137422c8 VV |
3254 | is_nothrow_destructible<_Tp>::value; |
3255 | template <typename _Tp> | |
288695f7 | 3256 | inline constexpr bool has_virtual_destructor_v = |
137422c8 VV |
3257 | has_virtual_destructor<_Tp>::value; |
3258 | template <typename _Tp> | |
288695f7 | 3259 | inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value; |
137422c8 | 3260 | template <typename _Tp> |
288695f7 | 3261 | inline constexpr size_t rank_v = rank<_Tp>::value; |
137422c8 | 3262 | template <typename _Tp, unsigned _Idx = 0> |
288695f7 | 3263 | inline constexpr size_t extent_v = extent<_Tp, _Idx>::value; |
73ae6eb5 | 3264 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_SAME |
137422c8 | 3265 | template <typename _Tp, typename _Up> |
73ae6eb5 | 3266 | inline constexpr bool is_same_v = __is_same(_Tp, _Up); |
44af818f JW |
3267 | #else |
3268 | template <typename _Tp, typename _Up> | |
3269 | inline constexpr bool is_same_v = std::is_same<_Tp, _Up>::value; | |
3270 | #endif | |
137422c8 | 3271 | template <typename _Base, typename _Derived> |
288695f7 | 3272 | inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; |
137422c8 | 3273 | template <typename _From, typename _To> |
288695f7 | 3274 | inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value; |
6963c3b9 JW |
3275 | template<typename _Fn, typename... _Args> |
3276 | inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value; | |
3277 | template<typename _Fn, typename... _Args> | |
3278 | inline constexpr bool is_nothrow_invocable_v | |
3279 | = is_nothrow_invocable<_Fn, _Args...>::value; | |
3280 | template<typename _Ret, typename _Fn, typename... _Args> | |
3281 | inline constexpr bool is_invocable_r_v | |
3282 | = is_invocable_r<_Ret, _Fn, _Args...>::value; | |
3283 | template<typename _Ret, typename _Fn, typename... _Args> | |
3284 | inline constexpr bool is_nothrow_invocable_r_v | |
3285 | = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; | |
3286 | /// @} | |
873c7d5a | 3287 | |
2d763763 | 3288 | #ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP |
873c7d5a JW |
3289 | # define __cpp_lib_has_unique_object_representations 201606 |
3290 | /// has_unique_object_representations | |
aba938d6 | 3291 | /// @since C++17 |
873c7d5a JW |
3292 | template<typename _Tp> |
3293 | struct has_unique_object_representations | |
3294 | : bool_constant<__has_unique_object_representations( | |
3295 | remove_cv_t<remove_all_extents_t<_Tp>> | |
3296 | )> | |
608a080c AP |
3297 | { |
3298 | static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}), | |
3299 | "template argument must be a complete class or an unbounded array"); | |
3300 | }; | |
b0e63d94 | 3301 | |
6963c3b9 | 3302 | /// @ingroup variable_templates |
b0e63d94 JW |
3303 | template<typename _Tp> |
3304 | inline constexpr bool has_unique_object_representations_v | |
3305 | = has_unique_object_representations<_Tp>::value; | |
1f5700e9 | 3306 | #endif |
e2ac6765 | 3307 | |
afa56c17 | 3308 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE |
ff273400 | 3309 | # define __cpp_lib_is_aggregate 201703 |
e2ac6765 | 3310 | /// is_aggregate |
aba938d6 | 3311 | /// @since C++17 |
e2ac6765 VV |
3312 | template<typename _Tp> |
3313 | struct is_aggregate | |
608a080c | 3314 | : bool_constant<__is_aggregate(remove_cv_t<_Tp>)> |
209ee624 | 3315 | { }; |
e2ac6765 | 3316 | |
6963c3b9 | 3317 | /// @ingroup variable_templates |
e2ac6765 VV |
3318 | template<typename _Tp> |
3319 | inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value; | |
3320 | #endif | |
137422c8 | 3321 | #endif // C++17 |
6b9539e2 | 3322 | |
aba938d6 JW |
3323 | #if __cplusplus >= 202002L |
3324 | ||
3325 | /** * Remove references and cv-qualifiers. | |
3326 | * @since C++20 | |
3327 | * @{ | |
3328 | */ | |
56772f62 JW |
3329 | #define __cpp_lib_remove_cvref 201711L |
3330 | ||
6791489e JW |
3331 | template<typename _Tp> |
3332 | struct remove_cvref | |
0e79e630 JW |
3333 | : remove_cv<_Tp> |
3334 | { }; | |
3335 | ||
3336 | template<typename _Tp> | |
3337 | struct remove_cvref<_Tp&> | |
3338 | : remove_cv<_Tp> | |
3339 | { }; | |
3340 | ||
3341 | template<typename _Tp> | |
3342 | struct remove_cvref<_Tp&&> | |
3343 | : remove_cv<_Tp> | |
3344 | { }; | |
6791489e JW |
3345 | |
3346 | template<typename _Tp> | |
0e79e630 | 3347 | using remove_cvref_t = typename remove_cvref<_Tp>::type; |
aba938d6 | 3348 | /// @} |
6791489e | 3349 | |
aba938d6 JW |
3350 | /** * Identity metafunction. |
3351 | * @since C++20 | |
3352 | * @{ | |
3353 | */ | |
56772f62 | 3354 | #define __cpp_lib_type_identity 201806L |
ee896276 JW |
3355 | template<typename _Tp> |
3356 | struct type_identity { using type = _Tp; }; | |
3357 | ||
3358 | template<typename _Tp> | |
3359 | using type_identity_t = typename type_identity<_Tp>::type; | |
aba938d6 | 3360 | /// @} |
ee896276 | 3361 | |
bb54e0b8 JW |
3362 | #define __cpp_lib_unwrap_ref 201811L |
3363 | ||
aba938d6 JW |
3364 | /** Unwrap a reference_wrapper |
3365 | * @since C++20 | |
3366 | * @{ | |
3367 | */ | |
3d18dc9d JW |
3368 | template<typename _Tp> |
3369 | struct unwrap_reference { using type = _Tp; }; | |
3370 | ||
3371 | template<typename _Tp> | |
3372 | struct unwrap_reference<reference_wrapper<_Tp>> { using type = _Tp&; }; | |
3373 | ||
82e8c3da JW |
3374 | template<typename _Tp> |
3375 | using unwrap_reference_t = typename unwrap_reference<_Tp>::type; | |
aba938d6 | 3376 | /// @} |
82e8c3da | 3377 | |
aba938d6 JW |
3378 | /** Decay type and if it's a reference_wrapper, unwrap it |
3379 | * @since C++20 | |
3380 | * @{ | |
3381 | */ | |
3d18dc9d | 3382 | template<typename _Tp> |
82e8c3da | 3383 | struct unwrap_ref_decay { using type = unwrap_reference_t<decay_t<_Tp>>; }; |
3d18dc9d JW |
3384 | |
3385 | template<typename _Tp> | |
3386 | using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type; | |
aba938d6 | 3387 | /// @} |
3d18dc9d | 3388 | |
46610940 JW |
3389 | #define __cpp_lib_bounded_array_traits 201902L |
3390 | ||
28d85efb | 3391 | /// True for a type that is an array of known bound. |
aba938d6 | 3392 | /// @since C++20 |
28d85efb JW |
3393 | template<typename _Tp> |
3394 | struct is_bounded_array | |
3395 | : public __is_array_known_bounds<_Tp> | |
3396 | { }; | |
3397 | ||
3398 | /// True for a type that is an array of unknown bound. | |
aba938d6 | 3399 | /// @since C++20 |
28d85efb JW |
3400 | template<typename _Tp> |
3401 | struct is_unbounded_array | |
3402 | : public __is_array_unknown_bounds<_Tp> | |
3403 | { }; | |
3404 | ||
6963c3b9 | 3405 | /// @ingroup variable_templates |
aba938d6 | 3406 | /// @since C++20 |
28d85efb JW |
3407 | template<typename _Tp> |
3408 | inline constexpr bool is_bounded_array_v | |
3409 | = is_bounded_array<_Tp>::value; | |
3410 | ||
6963c3b9 | 3411 | /// @ingroup variable_templates |
aba938d6 | 3412 | /// @since C++20 |
28d85efb JW |
3413 | template<typename _Tp> |
3414 | inline constexpr bool is_unbounded_array_v | |
3415 | = is_unbounded_array<_Tp>::value; | |
3416 | ||
037ef219 JW |
3417 | #if __has_builtin(__is_layout_compatible) |
3418 | ||
3419 | /// @since C++20 | |
3420 | template<typename _Tp, typename _Up> | |
3421 | struct is_layout_compatible | |
3422 | : bool_constant<__is_layout_compatible(_Tp, _Up)> | |
3423 | { }; | |
3424 | ||
3425 | /// @ingroup variable_templates | |
3426 | /// @since C++20 | |
3427 | template<typename _Tp, typename _Up> | |
3428 | constexpr bool is_layout_compatible_v | |
3429 | = __is_layout_compatible(_Tp, _Up); | |
3430 | ||
3431 | #if __has_builtin(__builtin_is_corresponding_member) | |
3432 | #define __cpp_lib_is_layout_compatible 201907L | |
3433 | ||
3434 | /// @since C++20 | |
3435 | template<typename _S1, typename _S2, typename _M1, typename _M2> | |
3436 | constexpr bool | |
3437 | is_corresponding_member(_M1 _S1::*__m1, _M2 _S2::*__m2) noexcept | |
3438 | { return __builtin_is_corresponding_member(__m1, __m2); } | |
3439 | #endif | |
3440 | #endif | |
3441 | ||
4fa6c0ec JW |
3442 | #if __has_builtin(__is_pointer_interconvertible_base_of) |
3443 | /// True if `_Derived` is standard-layout and has a base class of type `_Base` | |
3444 | /// @since C++20 | |
3445 | template<typename _Base, typename _Derived> | |
3446 | struct is_pointer_interconvertible_base_of | |
3447 | : bool_constant<__is_pointer_interconvertible_base_of(_Base, _Derived)> | |
3448 | { }; | |
3449 | ||
3450 | /// @ingroup variable_templates | |
3451 | /// @since C++20 | |
3452 | template<typename _Base, typename _Derived> | |
3453 | constexpr bool is_pointer_interconvertible_base_of_v | |
3454 | = __is_pointer_interconvertible_base_of(_Base, _Derived); | |
3455 | ||
3456 | #if __has_builtin(__builtin_is_pointer_interconvertible_with_class) | |
3457 | #define __cpp_lib_is_pointer_interconvertible 201907L | |
3458 | ||
3459 | /// True if `__mp` points to the first member of a standard-layout type | |
3460 | /// @returns true if `s.*__mp` is pointer-interconvertible with `s` | |
3461 | /// @since C++20 | |
3462 | template<typename _Tp, typename _Mem> | |
3463 | constexpr bool | |
3464 | is_pointer_interconvertible_with_class(_Mem _Tp::*__mp) noexcept | |
3465 | { return __builtin_is_pointer_interconvertible_with_class(__mp); } | |
3466 | #endif | |
3467 | #endif | |
3468 | ||
b8ecdc77 JW |
3469 | #if __cplusplus > 202002L |
3470 | #define __cpp_lib_is_scoped_enum 202011L | |
3471 | ||
aba938d6 | 3472 | /// True if the type is a scoped enumeration type. |
6963c3b9 | 3473 | /// @since C++23 |
6963c3b9 | 3474 | |
b8ecdc77 JW |
3475 | template<typename _Tp> |
3476 | struct is_scoped_enum | |
3477 | : false_type | |
3478 | { }; | |
3479 | ||
43ab1dc2 JW |
3480 | template<typename _Tp> |
3481 | requires __is_enum(_Tp) | |
3482 | && requires(_Tp __t) { __t = __t; } // fails if incomplete | |
b8ecdc77 | 3483 | struct is_scoped_enum<_Tp> |
43ab1dc2 JW |
3484 | : bool_constant<!requires(_Tp __t, void(*__f)(int)) { __f(__t); }> |
3485 | { }; | |
3486 | ||
3487 | // FIXME remove this partial specialization and use remove_cv_t<_Tp> above | |
3488 | // when PR c++/99968 is fixed. | |
3489 | template<typename _Tp> | |
3490 | requires __is_enum(_Tp) | |
3491 | && requires(_Tp __t) { __t = __t; } // fails if incomplete | |
3492 | struct is_scoped_enum<const _Tp> | |
3493 | : bool_constant<!requires(_Tp __t, void(*__f)(int)) { __f(__t); }> | |
b8ecdc77 JW |
3494 | { }; |
3495 | ||
aba938d6 JW |
3496 | /// @ingroup variable_templates |
3497 | /// @since C++23 | |
b8ecdc77 JW |
3498 | template<typename _Tp> |
3499 | inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value; | |
aba938d6 | 3500 | |
b8ecdc77 JW |
3501 | #endif // C++23 |
3502 | ||
0d7924f2 | 3503 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED |
134a6f7b | 3504 | |
8aa1550e | 3505 | #define __cpp_lib_is_constant_evaluated 201811L |
134a6f7b | 3506 | |
6963c3b9 | 3507 | /// Returns true only when called during constant evaluation. |
aba938d6 | 3508 | /// @since C++20 |
0d7924f2 JJ |
3509 | constexpr inline bool |
3510 | is_constant_evaluated() noexcept | |
3511 | { return __builtin_is_constant_evaluated(); } | |
3512 | #endif | |
3513 | ||
6963c3b9 | 3514 | /// @cond undocumented |
0f8b14ee JW |
3515 | template<typename _From, typename _To> |
3516 | using __copy_cv = typename __match_cv_qualifiers<_From, _To>::__type; | |
3517 | ||
3518 | template<typename _Xp, typename _Yp> | |
3519 | using __cond_res | |
3520 | = decltype(false ? declval<_Xp(&)()>()() : declval<_Yp(&)()>()()); | |
3521 | ||
3522 | template<typename _Ap, typename _Bp, typename = void> | |
3523 | struct __common_ref_impl | |
3524 | { }; | |
3525 | ||
3526 | // [meta.trans.other], COMMON-REF(A, B) | |
3527 | template<typename _Ap, typename _Bp> | |
3528 | using __common_ref = typename __common_ref_impl<_Ap, _Bp>::type; | |
3529 | ||
c37b5ddc JW |
3530 | // COND-RES(COPYCV(X, Y) &, COPYCV(Y, X) &) |
3531 | template<typename _Xp, typename _Yp> | |
3532 | using __condres_cvref | |
3533 | = __cond_res<__copy_cv<_Xp, _Yp>&, __copy_cv<_Yp, _Xp>&>; | |
3534 | ||
0f8b14ee JW |
3535 | // If A and B are both lvalue reference types, ... |
3536 | template<typename _Xp, typename _Yp> | |
c37b5ddc JW |
3537 | struct __common_ref_impl<_Xp&, _Yp&, __void_t<__condres_cvref<_Xp, _Yp>>> |
3538 | : enable_if<is_reference_v<__condres_cvref<_Xp, _Yp>>, | |
3539 | __condres_cvref<_Xp, _Yp>> | |
3540 | { }; | |
0f8b14ee JW |
3541 | |
3542 | // let C be remove_reference_t<COMMON-REF(X&, Y&)>&& | |
3543 | template<typename _Xp, typename _Yp> | |
3544 | using __common_ref_C = remove_reference_t<__common_ref<_Xp&, _Yp&>>&&; | |
3545 | ||
3546 | // If A and B are both rvalue reference types, ... | |
3547 | template<typename _Xp, typename _Yp> | |
3548 | struct __common_ref_impl<_Xp&&, _Yp&&, | |
3549 | _Require<is_convertible<_Xp&&, __common_ref_C<_Xp, _Yp>>, | |
3550 | is_convertible<_Yp&&, __common_ref_C<_Xp, _Yp>>>> | |
3551 | { using type = __common_ref_C<_Xp, _Yp>; }; | |
3552 | ||
3553 | // let D be COMMON-REF(const X&, Y&) | |
3554 | template<typename _Xp, typename _Yp> | |
3555 | using __common_ref_D = __common_ref<const _Xp&, _Yp&>; | |
3556 | ||
3557 | // If A is an rvalue reference and B is an lvalue reference, ... | |
3558 | template<typename _Xp, typename _Yp> | |
3559 | struct __common_ref_impl<_Xp&&, _Yp&, | |
3560 | _Require<is_convertible<_Xp&&, __common_ref_D<_Xp, _Yp>>>> | |
3561 | { using type = __common_ref_D<_Xp, _Yp>; }; | |
3562 | ||
3563 | // If A is an lvalue reference and B is an rvalue reference, ... | |
3564 | template<typename _Xp, typename _Yp> | |
3565 | struct __common_ref_impl<_Xp&, _Yp&&> | |
3566 | : __common_ref_impl<_Yp&&, _Xp&> | |
3567 | { }; | |
6963c3b9 | 3568 | /// @endcond |
0f8b14ee JW |
3569 | |
3570 | template<typename _Tp, typename _Up, | |
3571 | template<typename> class _TQual, template<typename> class _UQual> | |
3572 | struct basic_common_reference | |
3573 | { }; | |
3574 | ||
6963c3b9 | 3575 | /// @cond undocumented |
0f8b14ee JW |
3576 | template<typename _Tp> |
3577 | struct __xref | |
3578 | { template<typename _Up> using __type = __copy_cv<_Tp, _Up>; }; | |
3579 | ||
3580 | template<typename _Tp> | |
3581 | struct __xref<_Tp&> | |
3582 | { template<typename _Up> using __type = __copy_cv<_Tp, _Up>&; }; | |
3583 | ||
3584 | template<typename _Tp> | |
3585 | struct __xref<_Tp&&> | |
3586 | { template<typename _Up> using __type = __copy_cv<_Tp, _Up>&&; }; | |
3587 | ||
3588 | template<typename _Tp1, typename _Tp2> | |
3589 | using __basic_common_ref | |
3590 | = typename basic_common_reference<remove_cvref_t<_Tp1>, | |
3591 | remove_cvref_t<_Tp2>, | |
3592 | __xref<_Tp1>::template __type, | |
3593 | __xref<_Tp2>::template __type>::type; | |
6963c3b9 | 3594 | /// @endcond |
0f8b14ee JW |
3595 | |
3596 | template<typename... _Tp> | |
3597 | struct common_reference; | |
3598 | ||
3599 | template<typename... _Tp> | |
3600 | using common_reference_t = typename common_reference<_Tp...>::type; | |
3601 | ||
3602 | // If sizeof...(T) is zero, there shall be no member type. | |
3603 | template<> | |
3604 | struct common_reference<> | |
3605 | { }; | |
3606 | ||
3607 | // If sizeof...(T) is one ... | |
3608 | template<typename _Tp0> | |
3609 | struct common_reference<_Tp0> | |
3610 | { using type = _Tp0; }; | |
3611 | ||
6963c3b9 | 3612 | /// @cond undocumented |
0f8b14ee JW |
3613 | template<typename _Tp1, typename _Tp2, int _Bullet = 1, typename = void> |
3614 | struct __common_reference_impl | |
3615 | : __common_reference_impl<_Tp1, _Tp2, _Bullet + 1> | |
3616 | { }; | |
3617 | ||
3618 | // If sizeof...(T) is two ... | |
3619 | template<typename _Tp1, typename _Tp2> | |
3620 | struct common_reference<_Tp1, _Tp2> | |
3621 | : __common_reference_impl<_Tp1, _Tp2> | |
3622 | { }; | |
3623 | ||
3624 | // If T1 and T2 are reference types and COMMON-REF(T1, T2) is well-formed, ... | |
3625 | template<typename _Tp1, typename _Tp2> | |
3626 | struct __common_reference_impl<_Tp1&, _Tp2&, 1, | |
3627 | void_t<__common_ref<_Tp1&, _Tp2&>>> | |
3628 | { using type = __common_ref<_Tp1&, _Tp2&>; }; | |
3629 | ||
3630 | template<typename _Tp1, typename _Tp2> | |
3631 | struct __common_reference_impl<_Tp1&&, _Tp2&&, 1, | |
3632 | void_t<__common_ref<_Tp1&&, _Tp2&&>>> | |
3633 | { using type = __common_ref<_Tp1&&, _Tp2&&>; }; | |
3634 | ||
3635 | template<typename _Tp1, typename _Tp2> | |
3636 | struct __common_reference_impl<_Tp1&, _Tp2&&, 1, | |
3637 | void_t<__common_ref<_Tp1&, _Tp2&&>>> | |
3638 | { using type = __common_ref<_Tp1&, _Tp2&&>; }; | |
3639 | ||
3640 | template<typename _Tp1, typename _Tp2> | |
3641 | struct __common_reference_impl<_Tp1&&, _Tp2&, 1, | |
3642 | void_t<__common_ref<_Tp1&&, _Tp2&>>> | |
3643 | { using type = __common_ref<_Tp1&&, _Tp2&>; }; | |
3644 | ||
3645 | // Otherwise, if basic_common_reference<...>::type is well-formed, ... | |
3646 | template<typename _Tp1, typename _Tp2> | |
3647 | struct __common_reference_impl<_Tp1, _Tp2, 2, | |
3648 | void_t<__basic_common_ref<_Tp1, _Tp2>>> | |
3649 | { using type = __basic_common_ref<_Tp1, _Tp2>; }; | |
3650 | ||
3651 | // Otherwise, if COND-RES(T1, T2) is well-formed, ... | |
3652 | template<typename _Tp1, typename _Tp2> | |
3653 | struct __common_reference_impl<_Tp1, _Tp2, 3, | |
3654 | void_t<__cond_res<_Tp1, _Tp2>>> | |
3655 | { using type = __cond_res<_Tp1, _Tp2>; }; | |
3656 | ||
3657 | // Otherwise, if common_type_t<T1, T2> is well-formed, ... | |
3658 | template<typename _Tp1, typename _Tp2> | |
3659 | struct __common_reference_impl<_Tp1, _Tp2, 4, | |
3660 | void_t<common_type_t<_Tp1, _Tp2>>> | |
3661 | { using type = common_type_t<_Tp1, _Tp2>; }; | |
3662 | ||
3663 | // Otherwise, there shall be no member type. | |
3664 | template<typename _Tp1, typename _Tp2> | |
3665 | struct __common_reference_impl<_Tp1, _Tp2, 5, void> | |
3666 | { }; | |
3667 | ||
3668 | // Otherwise, if sizeof...(T) is greater than two, ... | |
3669 | template<typename _Tp1, typename _Tp2, typename... _Rest> | |
3670 | struct common_reference<_Tp1, _Tp2, _Rest...> | |
3671 | : __common_type_fold<common_reference<_Tp1, _Tp2>, | |
3672 | __common_type_pack<_Rest...>> | |
3673 | { }; | |
3674 | ||
3675 | // Reuse __common_type_fold for common_reference<T1, T2, Rest...> | |
3676 | template<typename _Tp1, typename _Tp2, typename... _Rest> | |
3677 | struct __common_type_fold<common_reference<_Tp1, _Tp2>, | |
3678 | __common_type_pack<_Rest...>, | |
3679 | void_t<common_reference_t<_Tp1, _Tp2>>> | |
3680 | : public common_reference<common_reference_t<_Tp1, _Tp2>, _Rest...> | |
3681 | { }; | |
6963c3b9 | 3682 | /// @endcond |
0f8b14ee | 3683 | |
e641ee43 JW |
3684 | #endif // C++2a |
3685 | ||
6963c3b9 JW |
3686 | /// @} group metaprogramming |
3687 | ||
12ffa228 | 3688 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 3689 | } // namespace std |
7b50cdef | 3690 | |
734f5023 | 3691 | #endif // C++11 |
57317d2a | 3692 | |
7274deff | 3693 | #endif // _GLIBCXX_TYPE_TRAITS |