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c0ffa2ba | 1 | // C++11 <type_traits> -*- C++ -*- |
af13a7a6 | 2 | |
818ab71a | 3 | // Copyright (C) 2007-2016 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 | |
c0eef1c8 JW |
40 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
41 | # if defined (__UINT_LEAST16_TYPE__) && defined(__UINT_LEAST32_TYPE__) | |
21e2806a JW |
42 | namespace std |
43 | { | |
c0eef1c8 JW |
44 | typedef __UINT_LEAST16_TYPE__ uint_least16_t; |
45 | typedef __UINT_LEAST32_TYPE__ uint_least32_t; | |
21e2806a | 46 | } |
c0eef1c8 JW |
47 | # else |
48 | # include <cstdint> | |
49 | # endif | |
50 | #endif | |
51 | ||
21e2806a JW |
52 | namespace std _GLIBCXX_VISIBILITY(default) |
53 | { | |
54 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
55 | ||
8e32aa11 | 56 | /** |
c0ffa2ba | 57 | * @defgroup metaprogramming Metaprogramming |
13901e4b JW |
58 | * @ingroup utilities |
59 | * | |
60 | * Template utilities for compile-time introspection and modification, | |
61 | * including type classification traits, type property inspection traits | |
62 | * and type transformation traits. | |
63 | * | |
5b9daa7e BK |
64 | * @{ |
65 | */ | |
ac65b7d2 DK |
66 | |
67 | /// integral_constant | |
68 | template<typename _Tp, _Tp __v> | |
69 | struct integral_constant | |
70 | { | |
71 | static constexpr _Tp value = __v; | |
72 | typedef _Tp value_type; | |
73 | typedef integral_constant<_Tp, __v> type; | |
9191d7a8 | 74 | constexpr operator value_type() const { return value; } |
db113eda | 75 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
76 | |
77 | #define __cpp_lib_integral_constant_callable 201304 | |
78 | ||
db113eda JW |
79 | constexpr value_type operator()() const { return value; } |
80 | #endif | |
ac65b7d2 | 81 | }; |
33ac58d5 | 82 | |
c0ffa2ba BK |
83 | template<typename _Tp, _Tp __v> |
84 | constexpr _Tp integral_constant<_Tp, __v>::value; | |
85 | ||
13901e4b | 86 | /// The type used as a compile-time boolean with true value. |
ac65b7d2 DK |
87 | typedef integral_constant<bool, true> true_type; |
88 | ||
13901e4b | 89 | /// The type used as a compile-time boolean with false value. |
ac65b7d2 DK |
90 | typedef integral_constant<bool, false> false_type; |
91 | ||
f6b640be JW |
92 | template<bool __v> |
93 | using __bool_constant = integral_constant<bool, __v>; | |
94 | ||
46ba1281 | 95 | #if __cplusplus > 201402L |
f9badf71 | 96 | # define __cpp_lib_bool_constant 201505 |
46ba1281 JW |
97 | template<bool __v> |
98 | using bool_constant = integral_constant<bool, __v>; | |
99 | #endif | |
100 | ||
123c516a | 101 | // Meta programming helper types. |
53dc5044 | 102 | |
123c516a PC |
103 | template<bool, typename, typename> |
104 | struct conditional; | |
53dc5044 | 105 | |
dd7b175e | 106 | template<typename...> |
123c516a PC |
107 | struct __or_; |
108 | ||
ac65b7d2 DK |
109 | template<> |
110 | struct __or_<> | |
111 | : public false_type | |
112 | { }; | |
113 | ||
dd7b175e PC |
114 | template<typename _B1> |
115 | struct __or_<_B1> | |
116 | : public _B1 | |
117 | { }; | |
118 | ||
123c516a PC |
119 | template<typename _B1, typename _B2> |
120 | struct __or_<_B1, _B2> | |
121 | : public conditional<_B1::value, _B1, _B2>::type | |
122 | { }; | |
123 | ||
124 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
125 | struct __or_<_B1, _B2, _B3, _Bn...> | |
126 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
127 | { }; | |
53dc5044 | 128 | |
dd7b175e | 129 | template<typename...> |
123c516a | 130 | struct __and_; |
53dc5044 | 131 | |
ac65b7d2 DK |
132 | template<> |
133 | struct __and_<> | |
134 | : public true_type | |
135 | { }; | |
136 | ||
dd7b175e PC |
137 | template<typename _B1> |
138 | struct __and_<_B1> | |
139 | : public _B1 | |
140 | { }; | |
141 | ||
123c516a PC |
142 | template<typename _B1, typename _B2> |
143 | struct __and_<_B1, _B2> | |
144 | : public conditional<_B1::value, _B2, _B1>::type | |
145 | { }; | |
146 | ||
147 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
148 | struct __and_<_B1, _B2, _B3, _Bn...> | |
149 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
150 | { }; | |
151 | ||
152 | template<typename _Pp> | |
153 | struct __not_ | |
154 | : public integral_constant<bool, !_Pp::value> | |
155 | { }; | |
156 | ||
c3a6648b VV |
157 | #if __cplusplus > 201402L |
158 | ||
159 | #define __cpp_lib_logical_traits 201511 | |
160 | ||
161 | template<typename... _Bn> | |
162 | struct conjunction | |
163 | : __and_<_Bn...> | |
164 | { }; | |
165 | ||
166 | template<typename... _Bn> | |
167 | struct disjunction | |
168 | : __or_<_Bn...> | |
169 | { }; | |
170 | ||
171 | template<typename _Pp> | |
172 | struct negation | |
173 | : __not_<_Pp> | |
174 | { }; | |
137422c8 VV |
175 | |
176 | template<typename... _Bn> | |
177 | constexpr bool conjunction_v | |
178 | = conjunction<_Bn...>::value; | |
179 | ||
180 | template<typename... _Bn> | |
181 | constexpr bool disjunction_v | |
182 | = disjunction<_Bn...>::value; | |
183 | ||
184 | template<typename _Pp> | |
185 | constexpr bool negation_v | |
186 | = negation<_Pp>::value; | |
187 | ||
c3a6648b VV |
188 | #endif |
189 | ||
b3618b71 DK |
190 | // For several sfinae-friendly trait implementations we transport both the |
191 | // result information (as the member type) and the failure information (no | |
192 | // member type). This is very similar to std::enable_if, but we cannot use | |
193 | // them, because we need to derive from them as an implementation detail. | |
194 | ||
195 | template<typename _Tp> | |
196 | struct __success_type | |
197 | { typedef _Tp type; }; | |
198 | ||
199 | struct __failure_type | |
200 | { }; | |
201 | ||
c0ffa2ba | 202 | // Primary type categories. |
123c516a | 203 | |
53dc5044 PC |
204 | template<typename> |
205 | struct remove_cv; | |
206 | ||
207 | template<typename> | |
208 | struct __is_void_helper | |
209 | : public false_type { }; | |
53dc5044 | 210 | |
123c516a PC |
211 | template<> |
212 | struct __is_void_helper<void> | |
213 | : public true_type { }; | |
53dc5044 PC |
214 | |
215 | /// is_void | |
216 | template<typename _Tp> | |
217 | struct is_void | |
82b12c4b | 218 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
219 | { }; |
220 | ||
221 | template<typename> | |
222 | struct __is_integral_helper | |
223 | : public false_type { }; | |
123c516a PC |
224 | |
225 | template<> | |
226 | struct __is_integral_helper<bool> | |
227 | : public true_type { }; | |
33ac58d5 | 228 | |
123c516a PC |
229 | template<> |
230 | struct __is_integral_helper<char> | |
231 | : public true_type { }; | |
232 | ||
233 | template<> | |
234 | struct __is_integral_helper<signed char> | |
235 | : public true_type { }; | |
236 | ||
237 | template<> | |
238 | struct __is_integral_helper<unsigned char> | |
239 | : public true_type { }; | |
240 | ||
53dc5044 | 241 | #ifdef _GLIBCXX_USE_WCHAR_T |
123c516a PC |
242 | template<> |
243 | struct __is_integral_helper<wchar_t> | |
244 | : public true_type { }; | |
53dc5044 | 245 | #endif |
123c516a PC |
246 | |
247 | template<> | |
248 | struct __is_integral_helper<char16_t> | |
249 | : public true_type { }; | |
250 | ||
251 | template<> | |
252 | struct __is_integral_helper<char32_t> | |
253 | : public true_type { }; | |
254 | ||
255 | template<> | |
256 | struct __is_integral_helper<short> | |
257 | : public true_type { }; | |
258 | ||
259 | template<> | |
260 | struct __is_integral_helper<unsigned short> | |
261 | : public true_type { }; | |
262 | ||
263 | template<> | |
264 | struct __is_integral_helper<int> | |
265 | : public true_type { }; | |
266 | ||
267 | template<> | |
268 | struct __is_integral_helper<unsigned int> | |
269 | : public true_type { }; | |
270 | ||
271 | template<> | |
272 | struct __is_integral_helper<long> | |
273 | : public true_type { }; | |
274 | ||
275 | template<> | |
276 | struct __is_integral_helper<unsigned long> | |
277 | : public true_type { }; | |
278 | ||
279 | template<> | |
280 | struct __is_integral_helper<long long> | |
281 | : public true_type { }; | |
282 | ||
283 | template<> | |
284 | struct __is_integral_helper<unsigned long long> | |
285 | : public true_type { }; | |
53dc5044 | 286 | |
78a7c317 DD |
287 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
288 | // uses one of these types for size_t. | |
289 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
6d585f01 | 290 | template<> |
78a7c317 | 291 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
6d585f01 PC |
292 | : public true_type { }; |
293 | ||
294 | template<> | |
78a7c317 DD |
295 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
296 | : public true_type { }; | |
297 | #endif | |
298 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
299 | template<> | |
300 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
301 | : public true_type { }; | |
302 | ||
303 | template<> | |
304 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
305 | : public true_type { }; | |
306 | #endif | |
307 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
308 | template<> | |
309 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
310 | : public true_type { }; | |
311 | ||
312 | template<> | |
313 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
314 | : public true_type { }; | |
315 | #endif | |
316 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
317 | template<> | |
318 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
319 | : public true_type { }; | |
320 | ||
321 | template<> | |
322 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
6d585f01 PC |
323 | : public true_type { }; |
324 | #endif | |
325 | ||
53dc5044 PC |
326 | /// is_integral |
327 | template<typename _Tp> | |
328 | struct is_integral | |
82b12c4b | 329 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
330 | { }; |
331 | ||
332 | template<typename> | |
333 | struct __is_floating_point_helper | |
334 | : public false_type { }; | |
123c516a PC |
335 | |
336 | template<> | |
337 | struct __is_floating_point_helper<float> | |
338 | : public true_type { }; | |
339 | ||
340 | template<> | |
341 | struct __is_floating_point_helper<double> | |
342 | : public true_type { }; | |
343 | ||
344 | template<> | |
345 | struct __is_floating_point_helper<long double> | |
346 | : public true_type { }; | |
53dc5044 | 347 | |
6d585f01 PC |
348 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
349 | template<> | |
350 | struct __is_floating_point_helper<__float128> | |
351 | : public true_type { }; | |
352 | #endif | |
353 | ||
53dc5044 PC |
354 | /// is_floating_point |
355 | template<typename _Tp> | |
356 | struct is_floating_point | |
82b12c4b | 357 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
358 | { }; |
359 | ||
360 | /// is_array | |
361 | template<typename> | |
362 | struct is_array | |
363 | : public false_type { }; | |
364 | ||
365 | template<typename _Tp, std::size_t _Size> | |
366 | struct is_array<_Tp[_Size]> | |
367 | : public true_type { }; | |
368 | ||
369 | template<typename _Tp> | |
370 | struct is_array<_Tp[]> | |
371 | : public true_type { }; | |
372 | ||
373 | template<typename> | |
374 | struct __is_pointer_helper | |
375 | : public false_type { }; | |
123c516a PC |
376 | |
377 | template<typename _Tp> | |
378 | struct __is_pointer_helper<_Tp*> | |
379 | : public true_type { }; | |
53dc5044 PC |
380 | |
381 | /// is_pointer | |
382 | template<typename _Tp> | |
383 | struct is_pointer | |
82b12c4b | 384 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
385 | { }; |
386 | ||
123c516a PC |
387 | /// is_lvalue_reference |
388 | template<typename> | |
389 | struct is_lvalue_reference | |
390 | : public false_type { }; | |
391 | ||
53dc5044 | 392 | template<typename _Tp> |
123c516a PC |
393 | struct is_lvalue_reference<_Tp&> |
394 | : public true_type { }; | |
395 | ||
396 | /// is_rvalue_reference | |
397 | template<typename> | |
398 | struct is_rvalue_reference | |
399 | : public false_type { }; | |
53dc5044 | 400 | |
53dc5044 | 401 | template<typename _Tp> |
123c516a PC |
402 | struct is_rvalue_reference<_Tp&&> |
403 | : public true_type { }; | |
404 | ||
405 | template<typename> | |
53dc5044 PC |
406 | struct is_function; |
407 | ||
408 | template<typename> | |
409 | struct __is_member_object_pointer_helper | |
410 | : public false_type { }; | |
123c516a PC |
411 | |
412 | template<typename _Tp, typename _Cp> | |
413 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
414 | : public integral_constant<bool, !is_function<_Tp>::value> { }; | |
53dc5044 PC |
415 | |
416 | /// is_member_object_pointer | |
417 | template<typename _Tp> | |
418 | struct is_member_object_pointer | |
82b12c4b FD |
419 | : public __is_member_object_pointer_helper< |
420 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
421 | { }; |
422 | ||
423 | template<typename> | |
424 | struct __is_member_function_pointer_helper | |
425 | : public false_type { }; | |
123c516a PC |
426 | |
427 | template<typename _Tp, typename _Cp> | |
428 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
429 | : public integral_constant<bool, is_function<_Tp>::value> { }; | |
53dc5044 PC |
430 | |
431 | /// is_member_function_pointer | |
432 | template<typename _Tp> | |
433 | struct is_member_function_pointer | |
82b12c4b FD |
434 | : public __is_member_function_pointer_helper< |
435 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
436 | { }; |
437 | ||
438 | /// is_enum | |
439 | template<typename _Tp> | |
440 | struct is_enum | |
441 | : public integral_constant<bool, __is_enum(_Tp)> | |
442 | { }; | |
443 | ||
444 | /// is_union | |
445 | template<typename _Tp> | |
446 | struct is_union | |
447 | : public integral_constant<bool, __is_union(_Tp)> | |
448 | { }; | |
449 | ||
450 | /// is_class | |
451 | template<typename _Tp> | |
452 | struct is_class | |
453 | : public integral_constant<bool, __is_class(_Tp)> | |
454 | { }; | |
455 | ||
456 | /// is_function | |
457 | template<typename> | |
458 | struct is_function | |
459 | : public false_type { }; | |
123c516a | 460 | |
53dc5044 PC |
461 | template<typename _Res, typename... _ArgTypes> |
462 | struct is_function<_Res(_ArgTypes...)> | |
463 | : public true_type { }; | |
123c516a | 464 | |
89898034 DK |
465 | template<typename _Res, typename... _ArgTypes> |
466 | struct is_function<_Res(_ArgTypes...) &> | |
467 | : public true_type { }; | |
468 | ||
469 | template<typename _Res, typename... _ArgTypes> | |
470 | struct is_function<_Res(_ArgTypes...) &&> | |
471 | : public true_type { }; | |
472 | ||
53dc5044 PC |
473 | template<typename _Res, typename... _ArgTypes> |
474 | struct is_function<_Res(_ArgTypes......)> | |
475 | : public true_type { }; | |
123c516a | 476 | |
89898034 DK |
477 | template<typename _Res, typename... _ArgTypes> |
478 | struct is_function<_Res(_ArgTypes......) &> | |
479 | : public true_type { }; | |
480 | ||
481 | template<typename _Res, typename... _ArgTypes> | |
482 | struct is_function<_Res(_ArgTypes......) &&> | |
483 | : public true_type { }; | |
484 | ||
53dc5044 PC |
485 | template<typename _Res, typename... _ArgTypes> |
486 | struct is_function<_Res(_ArgTypes...) const> | |
487 | : public true_type { }; | |
123c516a | 488 | |
89898034 DK |
489 | template<typename _Res, typename... _ArgTypes> |
490 | struct is_function<_Res(_ArgTypes...) const &> | |
491 | : public true_type { }; | |
492 | ||
493 | template<typename _Res, typename... _ArgTypes> | |
494 | struct is_function<_Res(_ArgTypes...) const &&> | |
495 | : public true_type { }; | |
496 | ||
53dc5044 PC |
497 | template<typename _Res, typename... _ArgTypes> |
498 | struct is_function<_Res(_ArgTypes......) const> | |
499 | : public true_type { }; | |
123c516a | 500 | |
89898034 DK |
501 | template<typename _Res, typename... _ArgTypes> |
502 | struct is_function<_Res(_ArgTypes......) const &> | |
503 | : public true_type { }; | |
504 | ||
505 | template<typename _Res, typename... _ArgTypes> | |
506 | struct is_function<_Res(_ArgTypes......) const &&> | |
507 | : public true_type { }; | |
508 | ||
53dc5044 PC |
509 | template<typename _Res, typename... _ArgTypes> |
510 | struct is_function<_Res(_ArgTypes...) volatile> | |
511 | : public true_type { }; | |
123c516a | 512 | |
89898034 DK |
513 | template<typename _Res, typename... _ArgTypes> |
514 | struct is_function<_Res(_ArgTypes...) volatile &> | |
515 | : public true_type { }; | |
516 | ||
517 | template<typename _Res, typename... _ArgTypes> | |
518 | struct is_function<_Res(_ArgTypes...) volatile &&> | |
519 | : public true_type { }; | |
520 | ||
53dc5044 PC |
521 | template<typename _Res, typename... _ArgTypes> |
522 | struct is_function<_Res(_ArgTypes......) volatile> | |
523 | : public true_type { }; | |
123c516a | 524 | |
89898034 DK |
525 | template<typename _Res, typename... _ArgTypes> |
526 | struct is_function<_Res(_ArgTypes......) volatile &> | |
527 | : public true_type { }; | |
528 | ||
529 | template<typename _Res, typename... _ArgTypes> | |
530 | struct is_function<_Res(_ArgTypes......) volatile &&> | |
531 | : public true_type { }; | |
532 | ||
53dc5044 PC |
533 | template<typename _Res, typename... _ArgTypes> |
534 | struct is_function<_Res(_ArgTypes...) const volatile> | |
535 | : public true_type { }; | |
123c516a | 536 | |
89898034 DK |
537 | template<typename _Res, typename... _ArgTypes> |
538 | struct is_function<_Res(_ArgTypes...) const volatile &> | |
539 | : public true_type { }; | |
540 | ||
541 | template<typename _Res, typename... _ArgTypes> | |
542 | struct is_function<_Res(_ArgTypes...) const volatile &&> | |
543 | : public true_type { }; | |
544 | ||
53dc5044 PC |
545 | template<typename _Res, typename... _ArgTypes> |
546 | struct is_function<_Res(_ArgTypes......) const volatile> | |
547 | : public true_type { }; | |
548 | ||
89898034 DK |
549 | template<typename _Res, typename... _ArgTypes> |
550 | struct is_function<_Res(_ArgTypes......) const volatile &> | |
551 | : public true_type { }; | |
552 | ||
553 | template<typename _Res, typename... _ArgTypes> | |
554 | struct is_function<_Res(_ArgTypes......) const volatile &&> | |
555 | : public true_type { }; | |
556 | ||
a15f7cb8 ESR |
557 | #define __cpp_lib_is_null_pointer 201309 |
558 | ||
1e673415 | 559 | template<typename> |
aa940ab5 | 560 | struct __is_null_pointer_helper |
1e673415 | 561 | : public false_type { }; |
123c516a PC |
562 | |
563 | template<> | |
aa940ab5 | 564 | struct __is_null_pointer_helper<std::nullptr_t> |
123c516a | 565 | : public true_type { }; |
1e673415 | 566 | |
aa940ab5 PC |
567 | /// is_null_pointer (LWG 2247). |
568 | template<typename _Tp> | |
569 | struct is_null_pointer | |
570 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
571 | { }; | |
572 | ||
573 | /// __is_nullptr_t (extension). | |
1e673415 PC |
574 | template<typename _Tp> |
575 | struct __is_nullptr_t | |
aa940ab5 | 576 | : public is_null_pointer<_Tp> |
1e673415 PC |
577 | { }; |
578 | ||
c0ffa2ba | 579 | // Composite type categories. |
123c516a PC |
580 | |
581 | /// is_reference | |
582 | template<typename _Tp> | |
583 | struct is_reference | |
584 | : public __or_<is_lvalue_reference<_Tp>, | |
585 | is_rvalue_reference<_Tp>>::type | |
586 | { }; | |
587 | ||
53dc5044 PC |
588 | /// is_arithmetic |
589 | template<typename _Tp> | |
590 | struct is_arithmetic | |
123c516a | 591 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
53dc5044 PC |
592 | { }; |
593 | ||
594 | /// is_fundamental | |
595 | template<typename _Tp> | |
596 | struct is_fundamental | |
aa940ab5 PC |
597 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
598 | is_null_pointer<_Tp>>::type | |
53dc5044 PC |
599 | { }; |
600 | ||
601 | /// is_object | |
602 | template<typename _Tp> | |
603 | struct is_object | |
123c516a PC |
604 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
605 | is_void<_Tp>>>::type | |
53dc5044 PC |
606 | { }; |
607 | ||
123c516a | 608 | template<typename> |
53dc5044 PC |
609 | struct is_member_pointer; |
610 | ||
611 | /// is_scalar | |
612 | template<typename _Tp> | |
613 | struct is_scalar | |
123c516a | 614 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
aa940ab5 | 615 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
53dc5044 PC |
616 | { }; |
617 | ||
618 | /// is_compound | |
619 | template<typename _Tp> | |
620 | struct is_compound | |
621 | : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; | |
622 | ||
53dc5044 PC |
623 | template<typename _Tp> |
624 | struct __is_member_pointer_helper | |
625 | : public false_type { }; | |
123c516a PC |
626 | |
627 | template<typename _Tp, typename _Cp> | |
628 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
629 | : public true_type { }; | |
53dc5044 | 630 | |
13901e4b | 631 | /// is_member_pointer |
53dc5044 | 632 | template<typename _Tp> |
123c516a | 633 | struct is_member_pointer |
82b12c4b | 634 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
635 | { }; |
636 | ||
89898034 DK |
637 | // Utility to detect referenceable types ([defns.referenceable]). |
638 | ||
639 | template<typename _Tp> | |
640 | struct __is_referenceable | |
641 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type | |
642 | { }; | |
643 | ||
644 | template<typename _Res, typename... _Args> | |
645 | struct __is_referenceable<_Res(_Args...)> | |
646 | : public true_type | |
647 | { }; | |
648 | ||
649 | template<typename _Res, typename... _Args> | |
650 | struct __is_referenceable<_Res(_Args......)> | |
651 | : public true_type | |
652 | { }; | |
653 | ||
c0ffa2ba | 654 | // Type properties. |
123c516a | 655 | |
53dc5044 PC |
656 | /// is_const |
657 | template<typename> | |
658 | struct is_const | |
659 | : public false_type { }; | |
660 | ||
661 | template<typename _Tp> | |
662 | struct is_const<_Tp const> | |
663 | : public true_type { }; | |
33ac58d5 | 664 | |
53dc5044 PC |
665 | /// is_volatile |
666 | template<typename> | |
667 | struct is_volatile | |
668 | : public false_type { }; | |
669 | ||
670 | template<typename _Tp> | |
671 | struct is_volatile<_Tp volatile> | |
672 | : public true_type { }; | |
673 | ||
123c516a PC |
674 | /// is_trivial |
675 | template<typename _Tp> | |
676 | struct is_trivial | |
677 | : public integral_constant<bool, __is_trivial(_Tp)> | |
678 | { }; | |
679 | ||
f5e523b7 VV |
680 | // is_trivially_copyable |
681 | template<typename _Tp> | |
682 | struct is_trivially_copyable | |
683 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
684 | { }; | |
123c516a PC |
685 | |
686 | /// is_standard_layout | |
687 | template<typename _Tp> | |
688 | struct is_standard_layout | |
689 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
690 | { }; | |
691 | ||
692 | /// is_pod | |
693 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
694 | template<typename _Tp> | |
695 | struct is_pod | |
696 | : public integral_constant<bool, __is_pod(_Tp)> | |
697 | { }; | |
698 | ||
699 | /// is_literal_type | |
700 | template<typename _Tp> | |
701 | struct is_literal_type | |
702 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
703 | { }; | |
704 | ||
53dc5044 PC |
705 | /// is_empty |
706 | template<typename _Tp> | |
707 | struct is_empty | |
708 | : public integral_constant<bool, __is_empty(_Tp)> | |
709 | { }; | |
710 | ||
711 | /// is_polymorphic | |
712 | template<typename _Tp> | |
713 | struct is_polymorphic | |
714 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
715 | { }; | |
716 | ||
4db7fcb9 ESR |
717 | #if __cplusplus >= 201402L |
718 | #define __cpp_lib_is_final 201402L | |
719 | /// is_final | |
720 | template<typename _Tp> | |
721 | struct is_final | |
722 | : public integral_constant<bool, __is_final(_Tp)> | |
723 | { }; | |
724 | #endif | |
725 | ||
53dc5044 PC |
726 | /// is_abstract |
727 | template<typename _Tp> | |
728 | struct is_abstract | |
729 | : public integral_constant<bool, __is_abstract(_Tp)> | |
730 | { }; | |
731 | ||
123c516a | 732 | template<typename _Tp, |
6a4b1a00 | 733 | bool = is_arithmetic<_Tp>::value> |
123c516a PC |
734 | struct __is_signed_helper |
735 | : public false_type { }; | |
736 | ||
53dc5044 | 737 | template<typename _Tp> |
6a4b1a00 PC |
738 | struct __is_signed_helper<_Tp, true> |
739 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
53dc5044 PC |
740 | { }; |
741 | ||
123c516a | 742 | /// is_signed |
53dc5044 | 743 | template<typename _Tp> |
123c516a | 744 | struct is_signed |
82b12c4b | 745 | : public __is_signed_helper<_Tp>::type |
123c516a PC |
746 | { }; |
747 | ||
748 | /// is_unsigned | |
749 | template<typename _Tp> | |
750 | struct is_unsigned | |
f7632193 | 751 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> |
123c516a PC |
752 | { }; |
753 | ||
754 | ||
c0ffa2ba | 755 | // Destructible and constructible type properties. |
123c516a | 756 | |
53dc5044 | 757 | template<typename> |
123c516a | 758 | struct add_rvalue_reference; |
53dc5044 | 759 | |
13901e4b JW |
760 | /** |
761 | * @brief Utility to simplify expressions used in unevaluated operands | |
762 | * @ingroup utilities | |
763 | */ | |
53dc5044 | 764 | template<typename _Tp> |
123c516a | 765 | typename add_rvalue_reference<_Tp>::type declval() noexcept; |
53dc5044 | 766 | |
123c516a PC |
767 | template<typename, unsigned = 0> |
768 | struct extent; | |
769 | ||
770 | template<typename> | |
771 | struct remove_all_extents; | |
772 | ||
773 | template<typename _Tp> | |
774 | struct __is_array_known_bounds | |
775 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
53dc5044 PC |
776 | { }; |
777 | ||
123c516a PC |
778 | template<typename _Tp> |
779 | struct __is_array_unknown_bounds | |
f7632193 | 780 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> |
53dc5044 | 781 | { }; |
33ac58d5 | 782 | |
62fa805f | 783 | // In N3290 is_destructible does not say anything about function |
2c7a09d7 | 784 | // types and abstract types, see LWG 2049. This implementation |
62fa805f DK |
785 | // describes function types as non-destructible and all complete |
786 | // object types as destructible, iff the explicit destructor | |
2c7a09d7 | 787 | // call expression is wellformed. |
62fa805f | 788 | struct __do_is_destructible_impl |
123c516a | 789 | { |
62fa805f | 790 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
123c516a PC |
791 | static true_type __test(int); |
792 | ||
793 | template<typename> | |
794 | static false_type __test(...); | |
795 | }; | |
53dc5044 PC |
796 | |
797 | template<typename _Tp> | |
62fa805f DK |
798 | struct __is_destructible_impl |
799 | : public __do_is_destructible_impl | |
123c516a PC |
800 | { |
801 | typedef decltype(__test<_Tp>(0)) type; | |
802 | }; | |
53dc5044 | 803 | |
62fa805f DK |
804 | template<typename _Tp, |
805 | bool = __or_<is_void<_Tp>, | |
806 | __is_array_unknown_bounds<_Tp>, | |
807 | is_function<_Tp>>::value, | |
808 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
809 | struct __is_destructible_safe; | |
810 | ||
811 | template<typename _Tp> | |
812 | struct __is_destructible_safe<_Tp, false, false> | |
813 | : public __is_destructible_impl<typename | |
814 | remove_all_extents<_Tp>::type>::type | |
815 | { }; | |
816 | ||
817 | template<typename _Tp> | |
818 | struct __is_destructible_safe<_Tp, true, false> | |
819 | : public false_type { }; | |
820 | ||
821 | template<typename _Tp> | |
822 | struct __is_destructible_safe<_Tp, false, true> | |
823 | : public true_type { }; | |
824 | ||
825 | /// is_destructible | |
826 | template<typename _Tp> | |
827 | struct is_destructible | |
82b12c4b | 828 | : public __is_destructible_safe<_Tp>::type |
62fa805f DK |
829 | { }; |
830 | ||
831 | // is_nothrow_destructible requires that is_destructible is | |
832 | // satisfied as well. We realize that by mimicing the | |
833 | // implementation of is_destructible but refer to noexcept(expr) | |
834 | // instead of decltype(expr). | |
835 | struct __do_is_nt_destructible_impl | |
123c516a | 836 | { |
62fa805f DK |
837 | template<typename _Tp> |
838 | static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())> | |
839 | __test(int); | |
123c516a PC |
840 | |
841 | template<typename> | |
842 | static false_type __test(...); | |
843 | }; | |
53dc5044 | 844 | |
53dc5044 | 845 | template<typename _Tp> |
62fa805f DK |
846 | struct __is_nt_destructible_impl |
847 | : public __do_is_nt_destructible_impl | |
123c516a PC |
848 | { |
849 | typedef decltype(__test<_Tp>(0)) type; | |
850 | }; | |
851 | ||
852 | template<typename _Tp, | |
853 | bool = __or_<is_void<_Tp>, | |
62fa805f DK |
854 | __is_array_unknown_bounds<_Tp>, |
855 | is_function<_Tp>>::value, | |
856 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
857 | struct __is_nt_destructible_safe; | |
53dc5044 PC |
858 | |
859 | template<typename _Tp> | |
62fa805f DK |
860 | struct __is_nt_destructible_safe<_Tp, false, false> |
861 | : public __is_nt_destructible_impl<typename | |
862 | remove_all_extents<_Tp>::type>::type | |
123c516a PC |
863 | { }; |
864 | ||
53dc5044 | 865 | template<typename _Tp> |
62fa805f | 866 | struct __is_nt_destructible_safe<_Tp, true, false> |
123c516a | 867 | : public false_type { }; |
53dc5044 PC |
868 | |
869 | template<typename _Tp> | |
62fa805f | 870 | struct __is_nt_destructible_safe<_Tp, false, true> |
123c516a PC |
871 | : public true_type { }; |
872 | ||
62fa805f | 873 | /// is_nothrow_destructible |
53dc5044 | 874 | template<typename _Tp> |
62fa805f | 875 | struct is_nothrow_destructible |
82b12c4b | 876 | : public __is_nt_destructible_safe<_Tp>::type |
123c516a PC |
877 | { }; |
878 | ||
879 | struct __do_is_default_constructible_impl | |
880 | { | |
881 | template<typename _Tp, typename = decltype(_Tp())> | |
882 | static true_type __test(int); | |
883 | ||
884 | template<typename> | |
885 | static false_type __test(...); | |
886 | }; | |
887 | ||
888 | template<typename _Tp> | |
889 | struct __is_default_constructible_impl | |
890 | : public __do_is_default_constructible_impl | |
53dc5044 | 891 | { |
123c516a | 892 | typedef decltype(__test<_Tp>(0)) type; |
53dc5044 | 893 | }; |
53dc5044 PC |
894 | |
895 | template<typename _Tp> | |
123c516a | 896 | struct __is_default_constructible_atom |
2c7a09d7 | 897 | : public __and_<__not_<is_void<_Tp>>, |
f7632193 | 898 | __is_default_constructible_impl<_Tp>> |
123c516a | 899 | { }; |
53dc5044 | 900 | |
123c516a PC |
901 | template<typename _Tp, bool = is_array<_Tp>::value> |
902 | struct __is_default_constructible_safe; | |
53dc5044 | 903 | |
2c7a09d7 | 904 | // The following technique is a workaround for a current core language |
33ac58d5 | 905 | // restriction, which does not allow for array types to occur in |
2c7a09d7 | 906 | // functional casts of the form T(). Complete arrays can be default- |
33ac58d5 | 907 | // constructed, if the element type is default-constructible, but |
2c7a09d7 | 908 | // arrays with unknown bounds are not. |
53dc5044 | 909 | template<typename _Tp> |
123c516a PC |
910 | struct __is_default_constructible_safe<_Tp, true> |
911 | : public __and_<__is_array_known_bounds<_Tp>, | |
912 | __is_default_constructible_atom<typename | |
f7632193 | 913 | remove_all_extents<_Tp>::type>> |
53dc5044 PC |
914 | { }; |
915 | ||
53dc5044 | 916 | template<typename _Tp> |
123c516a PC |
917 | struct __is_default_constructible_safe<_Tp, false> |
918 | : public __is_default_constructible_atom<_Tp>::type | |
919 | { }; | |
4a27a739 | 920 | |
123c516a | 921 | /// is_default_constructible |
4a27a739 | 922 | template<typename _Tp> |
123c516a | 923 | struct is_default_constructible |
82b12c4b | 924 | : public __is_default_constructible_safe<_Tp>::type |
123c516a | 925 | { }; |
4a27a739 | 926 | |
2c7a09d7 PC |
927 | |
928 | // Implementation of is_constructible. | |
929 | ||
930 | // The hardest part of this trait is the binary direct-initialization | |
931 | // case, because we hit into a functional cast of the form T(arg). | |
932 | // This implementation uses different strategies depending on the | |
933 | // target type to reduce the test overhead as much as possible: | |
934 | // | |
33ac58d5 | 935 | // a) For a reference target type, we use a static_cast expression |
2c7a09d7 PC |
936 | // modulo its extra cases. |
937 | // | |
938 | // b) For a non-reference target type we use a ::new expression. | |
123c516a PC |
939 | struct __do_is_static_castable_impl |
940 | { | |
941 | template<typename _From, typename _To, typename | |
942 | = decltype(static_cast<_To>(declval<_From>()))> | |
943 | static true_type __test(int); | |
4a27a739 | 944 | |
123c516a PC |
945 | template<typename, typename> |
946 | static false_type __test(...); | |
947 | }; | |
4a27a739 | 948 | |
123c516a PC |
949 | template<typename _From, typename _To> |
950 | struct __is_static_castable_impl | |
951 | : public __do_is_static_castable_impl | |
952 | { | |
953 | typedef decltype(__test<_From, _To>(0)) type; | |
954 | }; | |
939759fc | 955 | |
123c516a PC |
956 | template<typename _From, typename _To> |
957 | struct __is_static_castable_safe | |
2c7a09d7 | 958 | : public __is_static_castable_impl<_From, _To>::type |
4a27a739 PC |
959 | { }; |
960 | ||
123c516a PC |
961 | // __is_static_castable |
962 | template<typename _From, typename _To> | |
963 | struct __is_static_castable | |
964 | : public integral_constant<bool, (__is_static_castable_safe< | |
965 | _From, _To>::value)> | |
966 | { }; | |
939759fc | 967 | |
2c7a09d7 PC |
968 | // Implementation for non-reference types. To meet the proper |
969 | // variable definition semantics, we also need to test for | |
970 | // is_destructible in this case. | |
5db25ab1 DK |
971 | // This form should be simplified by a single expression: |
972 | // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. | |
123c516a PC |
973 | struct __do_is_direct_constructible_impl |
974 | { | |
975 | template<typename _Tp, typename _Arg, typename | |
976 | = decltype(::new _Tp(declval<_Arg>()))> | |
977 | static true_type __test(int); | |
4a27a739 | 978 | |
123c516a PC |
979 | template<typename, typename> |
980 | static false_type __test(...); | |
981 | }; | |
4a27a739 | 982 | |
123c516a PC |
983 | template<typename _Tp, typename _Arg> |
984 | struct __is_direct_constructible_impl | |
985 | : public __do_is_direct_constructible_impl | |
986 | { | |
987 | typedef decltype(__test<_Tp, _Arg>(0)) type; | |
988 | }; | |
4a27a739 | 989 | |
123c516a PC |
990 | template<typename _Tp, typename _Arg> |
991 | struct __is_direct_constructible_new_safe | |
992 | : public __and_<is_destructible<_Tp>, | |
f7632193 | 993 | __is_direct_constructible_impl<_Tp, _Arg>> |
123c516a | 994 | { }; |
4a27a739 | 995 | |
123c516a PC |
996 | template<typename, typename> |
997 | struct is_same; | |
4a27a739 | 998 | |
123c516a PC |
999 | template<typename, typename> |
1000 | struct is_base_of; | |
4a27a739 | 1001 | |
123c516a PC |
1002 | template<typename> |
1003 | struct remove_reference; | |
4a27a739 | 1004 | |
123c516a | 1005 | template<typename _From, typename _To, bool |
33ac58d5 | 1006 | = __not_<__or_<is_void<_From>, |
5db25ab1 | 1007 | is_function<_From>>>::value> |
123c516a | 1008 | struct __is_base_to_derived_ref; |
4a27a739 | 1009 | |
5db25ab1 DK |
1010 | // Detect whether we have a downcast situation during |
1011 | // reference binding. | |
123c516a PC |
1012 | template<typename _From, typename _To> |
1013 | struct __is_base_to_derived_ref<_From, _To, true> | |
1014 | { | |
1015 | typedef typename remove_cv<typename remove_reference<_From | |
1016 | >::type>::type __src_t; | |
1017 | typedef typename remove_cv<typename remove_reference<_To | |
1018 | >::type>::type __dst_t; | |
2c7a09d7 PC |
1019 | typedef __and_<__not_<is_same<__src_t, __dst_t>>, |
1020 | is_base_of<__src_t, __dst_t>> type; | |
123c516a PC |
1021 | static constexpr bool value = type::value; |
1022 | }; | |
4a27a739 | 1023 | |
123c516a PC |
1024 | template<typename _From, typename _To> |
1025 | struct __is_base_to_derived_ref<_From, _To, false> | |
1026 | : public false_type | |
4a27a739 PC |
1027 | { }; |
1028 | ||
123c516a PC |
1029 | template<typename _From, typename _To, bool |
1030 | = __and_<is_lvalue_reference<_From>, | |
1031 | is_rvalue_reference<_To>>::value> | |
1032 | struct __is_lvalue_to_rvalue_ref; | |
e133ace8 | 1033 | |
5db25ab1 DK |
1034 | // Detect whether we have an lvalue of non-function type |
1035 | // bound to a reference-compatible rvalue-reference. | |
123c516a PC |
1036 | template<typename _From, typename _To> |
1037 | struct __is_lvalue_to_rvalue_ref<_From, _To, true> | |
1038 | { | |
1039 | typedef typename remove_cv<typename remove_reference< | |
1040 | _From>::type>::type __src_t; | |
1041 | typedef typename remove_cv<typename remove_reference< | |
1042 | _To>::type>::type __dst_t; | |
33ac58d5 | 1043 | typedef __and_<__not_<is_function<__src_t>>, |
5db25ab1 DK |
1044 | __or_<is_same<__src_t, __dst_t>, |
1045 | is_base_of<__dst_t, __src_t>>> type; | |
123c516a PC |
1046 | static constexpr bool value = type::value; |
1047 | }; | |
e133ace8 | 1048 | |
123c516a PC |
1049 | template<typename _From, typename _To> |
1050 | struct __is_lvalue_to_rvalue_ref<_From, _To, false> | |
1051 | : public false_type | |
e133ace8 PC |
1052 | { }; |
1053 | ||
33ac58d5 | 1054 | // Here we handle direct-initialization to a reference type as |
2c7a09d7 PC |
1055 | // equivalent to a static_cast modulo overshooting conversions. |
1056 | // These are restricted to the following conversions: | |
5db25ab1 | 1057 | // a) A base class value to a derived class reference |
33ac58d5 | 1058 | // b) An lvalue to an rvalue-reference of reference-compatible |
5db25ab1 | 1059 | // types that are not functions |
123c516a PC |
1060 | template<typename _Tp, typename _Arg> |
1061 | struct __is_direct_constructible_ref_cast | |
1062 | : public __and_<__is_static_castable<_Arg, _Tp>, | |
1063 | __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, | |
1064 | __is_lvalue_to_rvalue_ref<_Arg, _Tp> | |
f7632193 | 1065 | >>> |
e133ace8 PC |
1066 | { }; |
1067 | ||
123c516a PC |
1068 | template<typename _Tp, typename _Arg> |
1069 | struct __is_direct_constructible_new | |
1070 | : public conditional<is_reference<_Tp>::value, | |
1071 | __is_direct_constructible_ref_cast<_Tp, _Arg>, | |
1072 | __is_direct_constructible_new_safe<_Tp, _Arg> | |
1073 | >::type | |
b0302c68 PC |
1074 | { }; |
1075 | ||
123c516a PC |
1076 | template<typename _Tp, typename _Arg> |
1077 | struct __is_direct_constructible | |
82b12c4b | 1078 | : public __is_direct_constructible_new<_Tp, _Arg>::type |
e133ace8 PC |
1079 | { }; |
1080 | ||
2c7a09d7 PC |
1081 | // Since default-construction and binary direct-initialization have |
1082 | // been handled separately, the implementation of the remaining | |
5db25ab1 DK |
1083 | // n-ary construction cases is rather straightforward. We can use |
1084 | // here a functional cast, because array types are excluded anyway | |
1085 | // and this form is never interpreted as a C cast. | |
123c516a PC |
1086 | struct __do_is_nary_constructible_impl |
1087 | { | |
1088 | template<typename _Tp, typename... _Args, typename | |
1089 | = decltype(_Tp(declval<_Args>()...))> | |
1090 | static true_type __test(int); | |
2b08f2c5 | 1091 | |
123c516a PC |
1092 | template<typename, typename...> |
1093 | static false_type __test(...); | |
1094 | }; | |
b0302c68 PC |
1095 | |
1096 | template<typename _Tp, typename... _Args> | |
123c516a PC |
1097 | struct __is_nary_constructible_impl |
1098 | : public __do_is_nary_constructible_impl | |
b0302c68 | 1099 | { |
123c516a | 1100 | typedef decltype(__test<_Tp, _Args...>(0)) type; |
b0302c68 PC |
1101 | }; |
1102 | ||
123c516a PC |
1103 | template<typename _Tp, typename... _Args> |
1104 | struct __is_nary_constructible | |
2c7a09d7 | 1105 | : public __is_nary_constructible_impl<_Tp, _Args...>::type |
b0302c68 | 1106 | { |
123c516a PC |
1107 | static_assert(sizeof...(_Args) > 1, |
1108 | "Only useful for > 1 arguments"); | |
1109 | }; | |
b0302c68 | 1110 | |
123c516a PC |
1111 | template<typename _Tp, typename... _Args> |
1112 | struct __is_constructible_impl | |
1113 | : public __is_nary_constructible<_Tp, _Args...> | |
1114 | { }; | |
b0302c68 | 1115 | |
123c516a PC |
1116 | template<typename _Tp, typename _Arg> |
1117 | struct __is_constructible_impl<_Tp, _Arg> | |
1118 | : public __is_direct_constructible<_Tp, _Arg> | |
1119 | { }; | |
1120 | ||
1121 | template<typename _Tp> | |
1122 | struct __is_constructible_impl<_Tp> | |
1123 | : public is_default_constructible<_Tp> | |
1124 | { }; | |
b0302c68 PC |
1125 | |
1126 | /// is_constructible | |
b0302c68 PC |
1127 | template<typename _Tp, typename... _Args> |
1128 | struct is_constructible | |
82b12c4b | 1129 | : public __is_constructible_impl<_Tp, _Args...>::type |
c32097d8 JM |
1130 | { }; |
1131 | ||
89898034 | 1132 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd | 1133 | struct __is_copy_constructible_impl; |
123c516a | 1134 | |
65cee9bd | 1135 | template<typename _Tp> |
89898034 | 1136 | struct __is_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1137 | : public false_type { }; |
1138 | ||
1139 | template<typename _Tp> | |
89898034 | 1140 | struct __is_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1141 | : public is_constructible<_Tp, const _Tp&> |
1142 | { }; | |
1143 | ||
1144 | /// is_copy_constructible | |
1145 | template<typename _Tp> | |
1146 | struct is_copy_constructible | |
1147 | : public __is_copy_constructible_impl<_Tp> | |
1148 | { }; | |
1149 | ||
89898034 | 1150 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1151 | struct __is_move_constructible_impl; |
1152 | ||
1153 | template<typename _Tp> | |
89898034 | 1154 | struct __is_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1155 | : public false_type { }; |
1156 | ||
1157 | template<typename _Tp> | |
89898034 | 1158 | struct __is_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1159 | : public is_constructible<_Tp, _Tp&&> |
1160 | { }; | |
1161 | ||
1162 | /// is_move_constructible | |
1163 | template<typename _Tp> | |
1164 | struct is_move_constructible | |
1165 | : public __is_move_constructible_impl<_Tp> | |
1166 | { }; | |
1167 | ||
1168 | template<typename _Tp> | |
1169 | struct __is_nt_default_constructible_atom | |
1170 | : public integral_constant<bool, noexcept(_Tp())> | |
1171 | { }; | |
1172 | ||
1173 | template<typename _Tp, bool = is_array<_Tp>::value> | |
1174 | struct __is_nt_default_constructible_impl; | |
1175 | ||
1176 | template<typename _Tp> | |
1177 | struct __is_nt_default_constructible_impl<_Tp, true> | |
1178 | : public __and_<__is_array_known_bounds<_Tp>, | |
1179 | __is_nt_default_constructible_atom<typename | |
f7632193 | 1180 | remove_all_extents<_Tp>::type>> |
65cee9bd PC |
1181 | { }; |
1182 | ||
1183 | template<typename _Tp> | |
1184 | struct __is_nt_default_constructible_impl<_Tp, false> | |
1185 | : public __is_nt_default_constructible_atom<_Tp> | |
1186 | { }; | |
1187 | ||
1188 | /// is_nothrow_default_constructible | |
1189 | template<typename _Tp> | |
1190 | struct is_nothrow_default_constructible | |
1191 | : public __and_<is_default_constructible<_Tp>, | |
f7632193 | 1192 | __is_nt_default_constructible_impl<_Tp>> |
65cee9bd | 1193 | { }; |
e4f32cb0 PC |
1194 | |
1195 | template<typename _Tp, typename... _Args> | |
65cee9bd PC |
1196 | struct __is_nt_constructible_impl |
1197 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
1198 | { }; | |
e4f32cb0 PC |
1199 | |
1200 | template<typename _Tp, typename _Arg> | |
65cee9bd PC |
1201 | struct __is_nt_constructible_impl<_Tp, _Arg> |
1202 | : public integral_constant<bool, | |
1203 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
1204 | { }; | |
1205 | ||
1206 | template<typename _Tp> | |
1207 | struct __is_nt_constructible_impl<_Tp> | |
1208 | : public is_nothrow_default_constructible<_Tp> | |
1209 | { }; | |
e4f32cb0 PC |
1210 | |
1211 | /// is_nothrow_constructible | |
1212 | template<typename _Tp, typename... _Args> | |
1213 | struct is_nothrow_constructible | |
65cee9bd | 1214 | : public __and_<is_constructible<_Tp, _Args...>, |
f7632193 | 1215 | __is_nt_constructible_impl<_Tp, _Args...>> |
65cee9bd PC |
1216 | { }; |
1217 | ||
89898034 | 1218 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1219 | struct __is_nothrow_copy_constructible_impl; |
1220 | ||
1221 | template<typename _Tp> | |
89898034 | 1222 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1223 | : public false_type { }; |
1224 | ||
1225 | template<typename _Tp> | |
89898034 | 1226 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1227 | : public is_nothrow_constructible<_Tp, const _Tp&> |
1228 | { }; | |
1229 | ||
1230 | /// is_nothrow_copy_constructible | |
1231 | template<typename _Tp> | |
1232 | struct is_nothrow_copy_constructible | |
1233 | : public __is_nothrow_copy_constructible_impl<_Tp> | |
1234 | { }; | |
1235 | ||
89898034 | 1236 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1237 | struct __is_nothrow_move_constructible_impl; |
1238 | ||
1239 | template<typename _Tp> | |
89898034 | 1240 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1241 | : public false_type { }; |
1242 | ||
1243 | template<typename _Tp> | |
89898034 | 1244 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1245 | : public is_nothrow_constructible<_Tp, _Tp&&> |
1246 | { }; | |
1247 | ||
1248 | /// is_nothrow_move_constructible | |
1249 | template<typename _Tp> | |
1250 | struct is_nothrow_move_constructible | |
1251 | : public __is_nothrow_move_constructible_impl<_Tp> | |
1252 | { }; | |
1253 | ||
f263981a PC |
1254 | template<typename _Tp, typename _Up> |
1255 | class __is_assignable_helper | |
f263981a | 1256 | { |
82b12c4b FD |
1257 | template<typename _Tp1, typename _Up1, |
1258 | typename = decltype(declval<_Tp1>() = declval<_Up1>())> | |
1259 | static true_type | |
f263981a PC |
1260 | __test(int); |
1261 | ||
1262 | template<typename, typename> | |
82b12c4b FD |
1263 | static false_type |
1264 | __test(...); | |
f263981a PC |
1265 | |
1266 | public: | |
82b12c4b | 1267 | typedef decltype(__test<_Tp, _Up>(0)) type; |
f263981a PC |
1268 | }; |
1269 | ||
1270 | /// is_assignable | |
1271 | template<typename _Tp, typename _Up> | |
1272 | struct is_assignable | |
82b12c4b | 1273 | : public __is_assignable_helper<_Tp, _Up>::type |
f263981a PC |
1274 | { }; |
1275 | ||
89898034 | 1276 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1277 | struct __is_copy_assignable_impl; |
1278 | ||
1279 | template<typename _Tp> | |
89898034 | 1280 | struct __is_copy_assignable_impl<_Tp, false> |
f263981a PC |
1281 | : public false_type { }; |
1282 | ||
1283 | template<typename _Tp> | |
89898034 | 1284 | struct __is_copy_assignable_impl<_Tp, true> |
9b3a81da | 1285 | : public is_assignable<_Tp&, const _Tp&> |
f263981a PC |
1286 | { }; |
1287 | ||
1288 | /// is_copy_assignable | |
1289 | template<typename _Tp> | |
1290 | struct is_copy_assignable | |
1291 | : public __is_copy_assignable_impl<_Tp> | |
1292 | { }; | |
1293 | ||
89898034 | 1294 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1295 | struct __is_move_assignable_impl; |
1296 | ||
1297 | template<typename _Tp> | |
89898034 | 1298 | struct __is_move_assignable_impl<_Tp, false> |
f263981a PC |
1299 | : public false_type { }; |
1300 | ||
1301 | template<typename _Tp> | |
89898034 | 1302 | struct __is_move_assignable_impl<_Tp, true> |
f263981a PC |
1303 | : public is_assignable<_Tp&, _Tp&&> |
1304 | { }; | |
1305 | ||
1306 | /// is_move_assignable | |
1307 | template<typename _Tp> | |
1308 | struct is_move_assignable | |
1309 | : public __is_move_assignable_impl<_Tp> | |
1310 | { }; | |
1311 | ||
1312 | template<typename _Tp, typename _Up> | |
1313 | struct __is_nt_assignable_impl | |
1314 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1315 | { }; | |
1316 | ||
1317 | /// is_nothrow_assignable | |
1318 | template<typename _Tp, typename _Up> | |
1319 | struct is_nothrow_assignable | |
1320 | : public __and_<is_assignable<_Tp, _Up>, | |
f7632193 | 1321 | __is_nt_assignable_impl<_Tp, _Up>> |
f263981a PC |
1322 | { }; |
1323 | ||
89898034 | 1324 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1325 | struct __is_nt_copy_assignable_impl; |
1326 | ||
1327 | template<typename _Tp> | |
89898034 | 1328 | struct __is_nt_copy_assignable_impl<_Tp, false> |
f263981a PC |
1329 | : public false_type { }; |
1330 | ||
1331 | template<typename _Tp> | |
89898034 | 1332 | struct __is_nt_copy_assignable_impl<_Tp, true> |
9b3a81da | 1333 | : public is_nothrow_assignable<_Tp&, const _Tp&> |
f263981a PC |
1334 | { }; |
1335 | ||
1336 | /// is_nothrow_copy_assignable | |
1337 | template<typename _Tp> | |
1338 | struct is_nothrow_copy_assignable | |
1339 | : public __is_nt_copy_assignable_impl<_Tp> | |
1340 | { }; | |
1341 | ||
89898034 | 1342 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1343 | struct __is_nt_move_assignable_impl; |
1344 | ||
1345 | template<typename _Tp> | |
89898034 | 1346 | struct __is_nt_move_assignable_impl<_Tp, false> |
f263981a PC |
1347 | : public false_type { }; |
1348 | ||
1349 | template<typename _Tp> | |
89898034 | 1350 | struct __is_nt_move_assignable_impl<_Tp, true> |
f263981a PC |
1351 | : public is_nothrow_assignable<_Tp&, _Tp&&> |
1352 | { }; | |
1353 | ||
1354 | /// is_nothrow_move_assignable | |
65cee9bd | 1355 | template<typename _Tp> |
f263981a PC |
1356 | struct is_nothrow_move_assignable |
1357 | : public __is_nt_move_assignable_impl<_Tp> | |
e4f32cb0 PC |
1358 | { }; |
1359 | ||
f5e523b7 VV |
1360 | /// is_trivially_constructible |
1361 | template<typename _Tp, typename... _Args> | |
1362 | struct is_trivially_constructible | |
1363 | : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool, | |
f7632193 | 1364 | __is_trivially_constructible(_Tp, _Args...)>> |
f5e523b7 | 1365 | { }; |
33ac58d5 | 1366 | |
f5e523b7 VV |
1367 | /// is_trivially_default_constructible |
1368 | template<typename _Tp> | |
1369 | struct is_trivially_default_constructible | |
1370 | : public is_trivially_constructible<_Tp>::type | |
1371 | { }; | |
6a9ecd34 | 1372 | |
f7632193 VV |
1373 | struct __do_is_implicitly_default_constructible_impl |
1374 | { | |
1375 | template <typename _Tp> | |
1376 | static void __helper(const _Tp&); | |
1377 | ||
1378 | template <typename _Tp> | |
1379 | static true_type __test(const _Tp&, | |
1380 | decltype(__helper<const _Tp&>({}))* = 0); | |
1381 | ||
1382 | static false_type __test(...); | |
1383 | }; | |
1384 | ||
1385 | template<typename _Tp> | |
1386 | struct __is_implicitly_default_constructible_impl | |
1387 | : public __do_is_implicitly_default_constructible_impl | |
1388 | { | |
1389 | typedef decltype(__test(declval<_Tp>())) type; | |
1390 | }; | |
1391 | ||
1392 | template<typename _Tp> | |
1393 | struct __is_implicitly_default_constructible_safe | |
1394 | : public __is_implicitly_default_constructible_impl<_Tp>::type | |
1395 | { }; | |
1396 | ||
1397 | template <typename _Tp> | |
1398 | struct __is_implicitly_default_constructible | |
1399 | : public __and_<is_default_constructible<_Tp>, | |
1400 | __is_implicitly_default_constructible_safe<_Tp>> | |
1401 | { }; | |
1402 | ||
f5e523b7 VV |
1403 | /// is_trivially_copy_constructible |
1404 | template<typename _Tp> | |
1405 | struct is_trivially_copy_constructible | |
33ac58d5 | 1406 | : public __and_<is_copy_constructible<_Tp>, |
f5e523b7 | 1407 | integral_constant<bool, |
f7632193 | 1408 | __is_trivially_constructible(_Tp, const _Tp&)>> |
f5e523b7 | 1409 | { }; |
33ac58d5 | 1410 | |
f5e523b7 VV |
1411 | /// is_trivially_move_constructible |
1412 | template<typename _Tp> | |
1413 | struct is_trivially_move_constructible | |
33ac58d5 | 1414 | : public __and_<is_move_constructible<_Tp>, |
f5e523b7 | 1415 | integral_constant<bool, |
f7632193 | 1416 | __is_trivially_constructible(_Tp, _Tp&&)>> |
f5e523b7 | 1417 | { }; |
6a9ecd34 | 1418 | |
f5e523b7 VV |
1419 | /// is_trivially_assignable |
1420 | template<typename _Tp, typename _Up> | |
1421 | struct is_trivially_assignable | |
33ac58d5 | 1422 | : public __and_<is_assignable<_Tp, _Up>, |
f5e523b7 | 1423 | integral_constant<bool, |
f7632193 | 1424 | __is_trivially_assignable(_Tp, _Up)>> |
f5e523b7 | 1425 | { }; |
6a9ecd34 | 1426 | |
f5e523b7 VV |
1427 | /// is_trivially_copy_assignable |
1428 | template<typename _Tp> | |
1429 | struct is_trivially_copy_assignable | |
33ac58d5 | 1430 | : public __and_<is_copy_assignable<_Tp>, |
f5e523b7 | 1431 | integral_constant<bool, |
f7632193 | 1432 | __is_trivially_assignable(_Tp&, const _Tp&)>> |
f5e523b7 | 1433 | { }; |
6a9ecd34 | 1434 | |
f5e523b7 VV |
1435 | /// is_trivially_move_assignable |
1436 | template<typename _Tp> | |
1437 | struct is_trivially_move_assignable | |
33ac58d5 | 1438 | : public __and_<is_move_assignable<_Tp>, |
f5e523b7 | 1439 | integral_constant<bool, |
f7632193 | 1440 | __is_trivially_assignable(_Tp&, _Tp&&)>> |
f5e523b7 | 1441 | { }; |
6a9ecd34 PC |
1442 | |
1443 | /// is_trivially_destructible | |
1444 | template<typename _Tp> | |
1445 | struct is_trivially_destructible | |
1446 | : public __and_<is_destructible<_Tp>, integral_constant<bool, | |
f7632193 | 1447 | __has_trivial_destructor(_Tp)>> |
6a9ecd34 PC |
1448 | { }; |
1449 | ||
e133ace8 | 1450 | |
123c516a PC |
1451 | /// has_virtual_destructor |
1452 | template<typename _Tp> | |
1453 | struct has_virtual_destructor | |
1454 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
1455 | { }; | |
1456 | ||
33ac58d5 | 1457 | |
123c516a PC |
1458 | // type property queries. |
1459 | ||
1460 | /// alignment_of | |
1461 | template<typename _Tp> | |
1462 | struct alignment_of | |
1463 | : public integral_constant<std::size_t, __alignof__(_Tp)> { }; | |
33ac58d5 | 1464 | |
123c516a PC |
1465 | /// rank |
1466 | template<typename> | |
1467 | struct rank | |
1468 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1469 | |
123c516a PC |
1470 | template<typename _Tp, std::size_t _Size> |
1471 | struct rank<_Tp[_Size]> | |
1472 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1473 | ||
1474 | template<typename _Tp> | |
1475 | struct rank<_Tp[]> | |
1476 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1477 | ||
1478 | /// extent | |
1479 | template<typename, unsigned _Uint> | |
1480 | struct extent | |
1481 | : public integral_constant<std::size_t, 0> { }; | |
33ac58d5 | 1482 | |
123c516a PC |
1483 | template<typename _Tp, unsigned _Uint, std::size_t _Size> |
1484 | struct extent<_Tp[_Size], _Uint> | |
1485 | : public integral_constant<std::size_t, | |
1486 | _Uint == 0 ? _Size : extent<_Tp, | |
1487 | _Uint - 1>::value> | |
1488 | { }; | |
1489 | ||
1490 | template<typename _Tp, unsigned _Uint> | |
1491 | struct extent<_Tp[], _Uint> | |
1492 | : public integral_constant<std::size_t, | |
1493 | _Uint == 0 ? 0 : extent<_Tp, | |
1494 | _Uint - 1>::value> | |
1495 | { }; | |
1496 | ||
1497 | ||
c0ffa2ba | 1498 | // Type relations. |
123c516a PC |
1499 | |
1500 | /// is_same | |
1501 | template<typename, typename> | |
1502 | struct is_same | |
1503 | : public false_type { }; | |
1504 | ||
1505 | template<typename _Tp> | |
1506 | struct is_same<_Tp, _Tp> | |
1507 | : public true_type { }; | |
b0302c68 | 1508 | |
939759fc | 1509 | /// is_base_of |
e133ace8 PC |
1510 | template<typename _Base, typename _Derived> |
1511 | struct is_base_of | |
1512 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1513 | { }; | |
1514 | ||
297f34d7 | 1515 | template<typename _From, typename _To, |
123c516a PC |
1516 | bool = __or_<is_void<_From>, is_function<_To>, |
1517 | is_array<_To>>::value> | |
297f34d7 | 1518 | struct __is_convertible_helper |
82b12c4b | 1519 | { typedef typename is_void<_To>::type type; }; |
297f34d7 | 1520 | |
e133ace8 | 1521 | template<typename _From, typename _To> |
b0302c68 | 1522 | class __is_convertible_helper<_From, _To, false> |
e133ace8 | 1523 | { |
82b12c4b FD |
1524 | template<typename _To1> |
1525 | static void __test_aux(_To1); | |
8e7d962a | 1526 | |
82b12c4b FD |
1527 | template<typename _From1, typename _To1, |
1528 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1529 | static true_type | |
8e7d962a PC |
1530 | __test(int); |
1531 | ||
1532 | template<typename, typename> | |
82b12c4b FD |
1533 | static false_type |
1534 | __test(...); | |
297f34d7 | 1535 | |
e133ace8 | 1536 | public: |
82b12c4b | 1537 | typedef decltype(__test<_From, _To>(0)) type; |
e133ace8 PC |
1538 | }; |
1539 | ||
82b12c4b | 1540 | |
b0302c68 | 1541 | /// is_convertible |
e133ace8 PC |
1542 | template<typename _From, typename _To> |
1543 | struct is_convertible | |
82b12c4b | 1544 | : public __is_convertible_helper<_From, _To>::type |
e133ace8 PC |
1545 | { }; |
1546 | ||
fd735b6a | 1547 | |
c0ffa2ba | 1548 | // Const-volatile modifications. |
7b50cdef | 1549 | |
123c516a | 1550 | /// remove_const |
7b50cdef | 1551 | template<typename _Tp> |
123c516a PC |
1552 | struct remove_const |
1553 | { typedef _Tp type; }; | |
7b50cdef | 1554 | |
123c516a PC |
1555 | template<typename _Tp> |
1556 | struct remove_const<_Tp const> | |
1557 | { typedef _Tp type; }; | |
33ac58d5 | 1558 | |
123c516a PC |
1559 | /// remove_volatile |
1560 | template<typename _Tp> | |
1561 | struct remove_volatile | |
1562 | { typedef _Tp type; }; | |
7b50cdef | 1563 | |
123c516a PC |
1564 | template<typename _Tp> |
1565 | struct remove_volatile<_Tp volatile> | |
1566 | { typedef _Tp type; }; | |
33ac58d5 | 1567 | |
123c516a PC |
1568 | /// remove_cv |
1569 | template<typename _Tp> | |
1570 | struct remove_cv | |
1571 | { | |
1572 | typedef typename | |
1573 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1574 | }; | |
33ac58d5 | 1575 | |
123c516a PC |
1576 | /// add_const |
1577 | template<typename _Tp> | |
1578 | struct add_const | |
1579 | { typedef _Tp const type; }; | |
33ac58d5 | 1580 | |
123c516a PC |
1581 | /// add_volatile |
1582 | template<typename _Tp> | |
1583 | struct add_volatile | |
1584 | { typedef _Tp volatile type; }; | |
33ac58d5 | 1585 | |
123c516a PC |
1586 | /// add_cv |
1587 | template<typename _Tp> | |
1588 | struct add_cv | |
1589 | { | |
1590 | typedef typename | |
1591 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1592 | }; | |
7b50cdef | 1593 | |
4457e88c | 1594 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
1595 | |
1596 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1597 | ||
4457e88c JW |
1598 | /// Alias template for remove_const |
1599 | template<typename _Tp> | |
1600 | using remove_const_t = typename remove_const<_Tp>::type; | |
1601 | ||
1602 | /// Alias template for remove_volatile | |
1603 | template<typename _Tp> | |
1604 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1605 | ||
1606 | /// Alias template for remove_cv | |
1607 | template<typename _Tp> | |
1608 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1609 | ||
1610 | /// Alias template for add_const | |
1611 | template<typename _Tp> | |
1612 | using add_const_t = typename add_const<_Tp>::type; | |
1613 | ||
1614 | /// Alias template for add_volatile | |
1615 | template<typename _Tp> | |
1616 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1617 | ||
1618 | /// Alias template for add_cv | |
1619 | template<typename _Tp> | |
1620 | using add_cv_t = typename add_cv<_Tp>::type; | |
1621 | #endif | |
7b50cdef | 1622 | |
123c516a | 1623 | // Reference transformations. |
7b50cdef | 1624 | |
123c516a PC |
1625 | /// remove_reference |
1626 | template<typename _Tp> | |
1627 | struct remove_reference | |
1628 | { typedef _Tp type; }; | |
7b50cdef | 1629 | |
123c516a PC |
1630 | template<typename _Tp> |
1631 | struct remove_reference<_Tp&> | |
1632 | { typedef _Tp type; }; | |
7b50cdef | 1633 | |
123c516a PC |
1634 | template<typename _Tp> |
1635 | struct remove_reference<_Tp&&> | |
1636 | { typedef _Tp type; }; | |
1637 | ||
89898034 | 1638 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1639 | struct __add_lvalue_reference_helper |
1640 | { typedef _Tp type; }; | |
7b50cdef | 1641 | |
5e108459 | 1642 | template<typename _Tp> |
89898034 | 1643 | struct __add_lvalue_reference_helper<_Tp, true> |
123c516a | 1644 | { typedef _Tp& type; }; |
5e108459 | 1645 | |
123c516a | 1646 | /// add_lvalue_reference |
5e108459 | 1647 | template<typename _Tp> |
123c516a PC |
1648 | struct add_lvalue_reference |
1649 | : public __add_lvalue_reference_helper<_Tp> | |
1650 | { }; | |
1651 | ||
89898034 | 1652 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1653 | struct __add_rvalue_reference_helper |
1654 | { typedef _Tp type; }; | |
5e108459 PC |
1655 | |
1656 | template<typename _Tp> | |
123c516a PC |
1657 | struct __add_rvalue_reference_helper<_Tp, true> |
1658 | { typedef _Tp&& type; }; | |
5e108459 | 1659 | |
123c516a | 1660 | /// add_rvalue_reference |
5e108459 | 1661 | template<typename _Tp> |
123c516a PC |
1662 | struct add_rvalue_reference |
1663 | : public __add_rvalue_reference_helper<_Tp> | |
1664 | { }; | |
5e108459 | 1665 | |
4457e88c JW |
1666 | #if __cplusplus > 201103L |
1667 | /// Alias template for remove_reference | |
1668 | template<typename _Tp> | |
1669 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1670 | ||
1671 | /// Alias template for add_lvalue_reference | |
1672 | template<typename _Tp> | |
1673 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1674 | ||
1675 | /// Alias template for add_rvalue_reference | |
1676 | template<typename _Tp> | |
1677 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1678 | #endif | |
7b50cdef | 1679 | |
c0ffa2ba | 1680 | // Sign modifications. |
123c516a | 1681 | |
7b50cdef BK |
1682 | // Utility for constructing identically cv-qualified types. |
1683 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1684 | struct __cv_selector; | |
1685 | ||
1686 | template<typename _Unqualified> | |
1687 | struct __cv_selector<_Unqualified, false, false> | |
1688 | { typedef _Unqualified __type; }; | |
1689 | ||
1690 | template<typename _Unqualified> | |
1691 | struct __cv_selector<_Unqualified, false, true> | |
1692 | { typedef volatile _Unqualified __type; }; | |
1693 | ||
1694 | template<typename _Unqualified> | |
1695 | struct __cv_selector<_Unqualified, true, false> | |
1696 | { typedef const _Unqualified __type; }; | |
1697 | ||
1698 | template<typename _Unqualified> | |
1699 | struct __cv_selector<_Unqualified, true, true> | |
1700 | { typedef const volatile _Unqualified __type; }; | |
1701 | ||
1702 | template<typename _Qualified, typename _Unqualified, | |
1703 | bool _IsConst = is_const<_Qualified>::value, | |
1704 | bool _IsVol = is_volatile<_Qualified>::value> | |
b0302c68 | 1705 | class __match_cv_qualifiers |
7b50cdef | 1706 | { |
7b50cdef BK |
1707 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1708 | ||
1709 | public: | |
33ac58d5 | 1710 | typedef typename __match::__type __type; |
7b50cdef BK |
1711 | }; |
1712 | ||
7b50cdef BK |
1713 | // Utility for finding the unsigned versions of signed integral types. |
1714 | template<typename _Tp> | |
e133ace8 PC |
1715 | struct __make_unsigned |
1716 | { typedef _Tp __type; }; | |
7b50cdef BK |
1717 | |
1718 | template<> | |
1719 | struct __make_unsigned<char> | |
1720 | { typedef unsigned char __type; }; | |
1721 | ||
1722 | template<> | |
1723 | struct __make_unsigned<signed char> | |
1724 | { typedef unsigned char __type; }; | |
1725 | ||
7b50cdef BK |
1726 | template<> |
1727 | struct __make_unsigned<short> | |
1728 | { typedef unsigned short __type; }; | |
1729 | ||
1730 | template<> | |
1731 | struct __make_unsigned<int> | |
1732 | { typedef unsigned int __type; }; | |
1733 | ||
1734 | template<> | |
1735 | struct __make_unsigned<long> | |
1736 | { typedef unsigned long __type; }; | |
1737 | ||
1738 | template<> | |
1739 | struct __make_unsigned<long long> | |
1740 | { typedef unsigned long long __type; }; | |
1741 | ||
c0eef1c8 JW |
1742 | #if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__) |
1743 | template<> | |
1744 | struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__> | |
1745 | { }; | |
1746 | #endif | |
1747 | ||
78a7c317 DD |
1748 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1749 | template<> | |
1750 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1751 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1752 | #endif | |
1753 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1754 | template<> | |
1755 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1756 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1757 | #endif | |
1758 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
6d585f01 | 1759 | template<> |
78a7c317 DD |
1760 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1761 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1762 | #endif | |
1763 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1764 | template<> | |
1765 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1766 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1767 | #endif |
1768 | ||
7b50cdef | 1769 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1770 | template<typename _Tp, |
7b50cdef | 1771 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1772 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1773 | class __make_unsigned_selector; |
1774 | ||
7b50cdef | 1775 | template<typename _Tp> |
b0302c68 | 1776 | class __make_unsigned_selector<_Tp, true, false> |
7b50cdef | 1777 | { |
7b50cdef BK |
1778 | typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; |
1779 | typedef typename __unsignedt::__type __unsigned_type; | |
1780 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1781 | ||
1782 | public: | |
1783 | typedef typename __cv_unsigned::__type __type; | |
1784 | }; | |
1785 | ||
7b50cdef | 1786 | template<typename _Tp> |
b0302c68 | 1787 | class __make_unsigned_selector<_Tp, false, true> |
7b50cdef | 1788 | { |
a0230468 MM |
1789 | // With -fshort-enums, an enum may be as small as a char. |
1790 | typedef unsigned char __smallest; | |
1791 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); | |
1792 | static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); | |
ce2e6349 | 1793 | static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); |
73d81d3a JW |
1794 | static const bool __b3 = sizeof(_Tp) <= sizeof(unsigned long); |
1795 | typedef conditional<__b3, unsigned long, unsigned long long> __cond3; | |
1796 | typedef typename __cond3::type __cond3_type; | |
1797 | typedef conditional<__b2, unsigned int, __cond3_type> __cond2; | |
a0230468 MM |
1798 | typedef typename __cond2::type __cond2_type; |
1799 | typedef conditional<__b1, unsigned short, __cond2_type> __cond1; | |
1800 | typedef typename __cond1::type __cond1_type; | |
7b50cdef | 1801 | |
73d81d3a JW |
1802 | typedef typename conditional<__b0, __smallest, __cond1_type>::type |
1803 | __unsigned_type; | |
1804 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1805 | ||
7b50cdef | 1806 | public: |
73d81d3a | 1807 | typedef typename __cv_unsigned::__type __type; |
7b50cdef BK |
1808 | }; |
1809 | ||
7b50cdef BK |
1810 | // Given an integral/enum type, return the corresponding unsigned |
1811 | // integer type. | |
5b9daa7e BK |
1812 | // Primary template. |
1813 | /// make_unsigned | |
7b50cdef | 1814 | template<typename _Tp> |
33ac58d5 | 1815 | struct make_unsigned |
7b50cdef BK |
1816 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
1817 | ||
1818 | // Integral, but don't define. | |
1819 | template<> | |
1820 | struct make_unsigned<bool>; | |
1821 | ||
1822 | ||
1823 | // Utility for finding the signed versions of unsigned integral types. | |
1824 | template<typename _Tp> | |
e133ace8 PC |
1825 | struct __make_signed |
1826 | { typedef _Tp __type; }; | |
7b50cdef BK |
1827 | |
1828 | template<> | |
1829 | struct __make_signed<char> | |
1830 | { typedef signed char __type; }; | |
1831 | ||
1832 | template<> | |
1833 | struct __make_signed<unsigned char> | |
1834 | { typedef signed char __type; }; | |
1835 | ||
7b50cdef BK |
1836 | template<> |
1837 | struct __make_signed<unsigned short> | |
1838 | { typedef signed short __type; }; | |
1839 | ||
1840 | template<> | |
1841 | struct __make_signed<unsigned int> | |
1842 | { typedef signed int __type; }; | |
1843 | ||
1844 | template<> | |
1845 | struct __make_signed<unsigned long> | |
1846 | { typedef signed long __type; }; | |
1847 | ||
1848 | template<> | |
1849 | struct __make_signed<unsigned long long> | |
1850 | { typedef signed long long __type; }; | |
1851 | ||
c0eef1c8 JW |
1852 | #if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__) |
1853 | template<> | |
1854 | struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__> | |
1855 | { }; | |
1856 | #endif | |
1857 | ||
1858 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
1859 | template<> | |
1860 | struct __make_signed<char16_t> : __make_signed<uint_least16_t> | |
1861 | { }; | |
1862 | template<> | |
1863 | struct __make_signed<char32_t> : __make_signed<uint_least32_t> | |
1864 | { }; | |
1865 | #endif | |
1866 | ||
78a7c317 DD |
1867 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1868 | template<> | |
1869 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1870 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1871 | #endif | |
1872 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1873 | template<> | |
1874 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1875 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1876 | #endif | |
1877 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1878 | template<> | |
1879 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1880 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1881 | #endif | |
1882 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
6d585f01 | 1883 | template<> |
78a7c317 DD |
1884 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1885 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1886 | #endif |
1887 | ||
fb8ffd10 | 1888 | // Select between integral and enum: not possible to be both. |
33ac58d5 | 1889 | template<typename _Tp, |
7b50cdef | 1890 | bool _IsInt = is_integral<_Tp>::value, |
7b50cdef | 1891 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1892 | class __make_signed_selector; |
1893 | ||
7b50cdef | 1894 | template<typename _Tp> |
b0302c68 | 1895 | class __make_signed_selector<_Tp, true, false> |
7b50cdef | 1896 | { |
7b50cdef BK |
1897 | typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; |
1898 | typedef typename __signedt::__type __signed_type; | |
1899 | typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; | |
1900 | ||
1901 | public: | |
1902 | typedef typename __cv_signed::__type __type; | |
1903 | }; | |
1904 | ||
7b50cdef | 1905 | template<typename _Tp> |
b0302c68 | 1906 | class __make_signed_selector<_Tp, false, true> |
7b50cdef | 1907 | { |
73d81d3a | 1908 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
7b50cdef BK |
1909 | |
1910 | public: | |
73d81d3a | 1911 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
7b50cdef BK |
1912 | }; |
1913 | ||
7b50cdef BK |
1914 | // Given an integral/enum type, return the corresponding signed |
1915 | // integer type. | |
5b9daa7e BK |
1916 | // Primary template. |
1917 | /// make_signed | |
7b50cdef | 1918 | template<typename _Tp> |
33ac58d5 | 1919 | struct make_signed |
7b50cdef BK |
1920 | { typedef typename __make_signed_selector<_Tp>::__type type; }; |
1921 | ||
1922 | // Integral, but don't define. | |
1923 | template<> | |
1924 | struct make_signed<bool>; | |
cfa9a96b | 1925 | |
4457e88c JW |
1926 | #if __cplusplus > 201103L |
1927 | /// Alias template for make_signed | |
1928 | template<typename _Tp> | |
1929 | using make_signed_t = typename make_signed<_Tp>::type; | |
1930 | ||
1931 | /// Alias template for make_unsigned | |
1932 | template<typename _Tp> | |
1933 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1934 | #endif | |
123c516a | 1935 | |
c0ffa2ba | 1936 | // Array modifications. |
123c516a PC |
1937 | |
1938 | /// remove_extent | |
1939 | template<typename _Tp> | |
1940 | struct remove_extent | |
1941 | { typedef _Tp type; }; | |
1942 | ||
1943 | template<typename _Tp, std::size_t _Size> | |
1944 | struct remove_extent<_Tp[_Size]> | |
1945 | { typedef _Tp type; }; | |
1946 | ||
1947 | template<typename _Tp> | |
1948 | struct remove_extent<_Tp[]> | |
1949 | { typedef _Tp type; }; | |
1950 | ||
1951 | /// remove_all_extents | |
1952 | template<typename _Tp> | |
1953 | struct remove_all_extents | |
1954 | { typedef _Tp type; }; | |
1955 | ||
1956 | template<typename _Tp, std::size_t _Size> | |
1957 | struct remove_all_extents<_Tp[_Size]> | |
1958 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1959 | ||
1960 | template<typename _Tp> | |
1961 | struct remove_all_extents<_Tp[]> | |
1962 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1963 | ||
4457e88c JW |
1964 | #if __cplusplus > 201103L |
1965 | /// Alias template for remove_extent | |
1966 | template<typename _Tp> | |
1967 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1968 | ||
1969 | /// Alias template for remove_all_extents | |
1970 | template<typename _Tp> | |
1971 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1972 | #endif | |
123c516a | 1973 | |
c0ffa2ba | 1974 | // Pointer modifications. |
123c516a PC |
1975 | |
1976 | template<typename _Tp, typename> | |
1977 | struct __remove_pointer_helper | |
1978 | { typedef _Tp type; }; | |
1979 | ||
1980 | template<typename _Tp, typename _Up> | |
1981 | struct __remove_pointer_helper<_Tp, _Up*> | |
1982 | { typedef _Up type; }; | |
1983 | ||
1984 | /// remove_pointer | |
1985 | template<typename _Tp> | |
1986 | struct remove_pointer | |
1987 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1988 | { }; | |
1989 | ||
1990 | /// add_pointer | |
89898034 DK |
1991 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1992 | is_void<_Tp>>::value> | |
1993 | struct __add_pointer_helper | |
1994 | { typedef _Tp type; }; | |
1995 | ||
123c516a | 1996 | template<typename _Tp> |
89898034 | 1997 | struct __add_pointer_helper<_Tp, true> |
123c516a PC |
1998 | { typedef typename remove_reference<_Tp>::type* type; }; |
1999 | ||
89898034 | 2000 | template<typename _Tp> |
33ac58d5 | 2001 | struct add_pointer |
89898034 DK |
2002 | : public __add_pointer_helper<_Tp> |
2003 | { }; | |
2004 | ||
4457e88c JW |
2005 | #if __cplusplus > 201103L |
2006 | /// Alias template for remove_pointer | |
2007 | template<typename _Tp> | |
2008 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
2009 | ||
2010 | /// Alias template for add_pointer | |
2011 | template<typename _Tp> | |
2012 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
2013 | #endif | |
123c516a PC |
2014 | |
2015 | template<std::size_t _Len> | |
2016 | struct __aligned_storage_msa | |
33ac58d5 | 2017 | { |
123c516a PC |
2018 | union __type |
2019 | { | |
2020 | unsigned char __data[_Len]; | |
33ac58d5 | 2021 | struct __attribute__((__aligned__)) { } __align; |
123c516a PC |
2022 | }; |
2023 | }; | |
2024 | ||
2025 | /** | |
2026 | * @brief Alignment type. | |
2027 | * | |
2028 | * The value of _Align is a default-alignment which shall be the | |
2029 | * most stringent alignment requirement for any C++ object type | |
2030 | * whose size is no greater than _Len (3.9). The member typedef | |
2031 | * type shall be a POD type suitable for use as uninitialized | |
2032 | * storage for any object whose size is at most _Len and whose | |
2033 | * alignment is a divisor of _Align. | |
2034 | */ | |
2035 | template<std::size_t _Len, std::size_t _Align = | |
2036 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2037 | struct aligned_storage | |
33ac58d5 | 2038 | { |
123c516a PC |
2039 | union type |
2040 | { | |
2041 | unsigned char __data[_Len]; | |
33ac58d5 | 2042 | struct __attribute__((__aligned__((_Align)))) { } __align; |
123c516a PC |
2043 | }; |
2044 | }; | |
2045 | ||
d3718027 RS |
2046 | template <typename... _Types> |
2047 | struct __strictest_alignment | |
2048 | { | |
2049 | static const size_t _S_alignment = 0; | |
2050 | static const size_t _S_size = 0; | |
2051 | }; | |
2052 | ||
2053 | template <typename _Tp, typename... _Types> | |
2054 | struct __strictest_alignment<_Tp, _Types...> | |
2055 | { | |
2056 | static const size_t _S_alignment = | |
2057 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2058 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2059 | static const size_t _S_size = | |
2060 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2061 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2062 | }; | |
2063 | ||
2064 | /** | |
2065 | * @brief Provide aligned storage for types. | |
2066 | * | |
2067 | * [meta.trans.other] | |
2068 | * | |
2069 | * Provides aligned storage for any of the provided types of at | |
2070 | * least size _Len. | |
2071 | * | |
2072 | * @see aligned_storage | |
2073 | */ | |
2074 | template <size_t _Len, typename... _Types> | |
2075 | struct aligned_union | |
2076 | { | |
2077 | private: | |
2078 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2079 | ||
2080 | using __strictest = __strictest_alignment<_Types...>; | |
2081 | static const size_t _S_len = _Len > __strictest::_S_size | |
2082 | ? _Len : __strictest::_S_size; | |
2083 | public: | |
2084 | /// The value of the strictest alignment of _Types. | |
2085 | static const size_t alignment_value = __strictest::_S_alignment; | |
2086 | /// The storage. | |
2087 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2088 | }; | |
2089 | ||
2090 | template <size_t _Len, typename... _Types> | |
2091 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
123c516a PC |
2092 | |
2093 | // Decay trait for arrays and functions, used for perfect forwarding | |
2094 | // in make_pair, make_tuple, etc. | |
33ac58d5 | 2095 | template<typename _Up, |
123c516a | 2096 | bool _IsArray = is_array<_Up>::value, |
33ac58d5 | 2097 | bool _IsFunction = is_function<_Up>::value> |
123c516a PC |
2098 | struct __decay_selector; |
2099 | ||
2100 | // NB: DR 705. | |
33ac58d5 | 2101 | template<typename _Up> |
123c516a PC |
2102 | struct __decay_selector<_Up, false, false> |
2103 | { typedef typename remove_cv<_Up>::type __type; }; | |
2104 | ||
33ac58d5 | 2105 | template<typename _Up> |
123c516a PC |
2106 | struct __decay_selector<_Up, true, false> |
2107 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2108 | ||
33ac58d5 | 2109 | template<typename _Up> |
123c516a PC |
2110 | struct __decay_selector<_Up, false, true> |
2111 | { typedef typename add_pointer<_Up>::type __type; }; | |
2112 | ||
2113 | /// decay | |
33ac58d5 JW |
2114 | template<typename _Tp> |
2115 | class decay | |
2116 | { | |
123c516a PC |
2117 | typedef typename remove_reference<_Tp>::type __remove_type; |
2118 | ||
2119 | public: | |
2120 | typedef typename __decay_selector<__remove_type>::__type type; | |
2121 | }; | |
2122 | ||
2123 | template<typename _Tp> | |
2124 | class reference_wrapper; | |
2125 | ||
2126 | // Helper which adds a reference to a type when given a reference_wrapper | |
2127 | template<typename _Tp> | |
2128 | struct __strip_reference_wrapper | |
2129 | { | |
2130 | typedef _Tp __type; | |
2131 | }; | |
2132 | ||
2133 | template<typename _Tp> | |
2134 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2135 | { | |
2136 | typedef _Tp& __type; | |
2137 | }; | |
2138 | ||
123c516a PC |
2139 | template<typename _Tp> |
2140 | struct __decay_and_strip | |
2141 | { | |
2142 | typedef typename __strip_reference_wrapper< | |
2143 | typename decay<_Tp>::type>::__type __type; | |
2144 | }; | |
2145 | ||
2146 | ||
123c516a | 2147 | // Primary template. |
13901e4b | 2148 | /// Define a member typedef @c type only if a boolean constant is true. |
123c516a | 2149 | template<bool, typename _Tp = void> |
33ac58d5 | 2150 | struct enable_if |
123c516a PC |
2151 | { }; |
2152 | ||
2153 | // Partial specialization for true. | |
2154 | template<typename _Tp> | |
2155 | struct enable_if<true, _Tp> | |
2156 | { typedef _Tp type; }; | |
2157 | ||
23df8534 JW |
2158 | template<typename... _Cond> |
2159 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
123c516a | 2160 | |
123c516a | 2161 | // Primary template. |
13901e4b | 2162 | /// Define a member typedef @c type to one of two argument types. |
123c516a PC |
2163 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2164 | struct conditional | |
2165 | { typedef _Iftrue type; }; | |
2166 | ||
2167 | // Partial specialization for false. | |
2168 | template<typename _Iftrue, typename _Iffalse> | |
2169 | struct conditional<false, _Iftrue, _Iffalse> | |
2170 | { typedef _Iffalse type; }; | |
2171 | ||
5b9daa7e | 2172 | /// common_type |
cfa9a96b CF |
2173 | template<typename... _Tp> |
2174 | struct common_type; | |
2175 | ||
c0ffa2ba | 2176 | // Sfinae-friendly common_type implementation: |
b3618b71 DK |
2177 | |
2178 | struct __do_common_type_impl | |
2179 | { | |
2180 | template<typename _Tp, typename _Up> | |
6c5173c0 | 2181 | static __success_type<typename decay<decltype |
fe4e4e3b | 2182 | (true ? std::declval<_Tp>() |
6c5173c0 | 2183 | : std::declval<_Up>())>::type> _S_test(int); |
b3618b71 DK |
2184 | |
2185 | template<typename, typename> | |
2186 | static __failure_type _S_test(...); | |
2187 | }; | |
2188 | ||
2189 | template<typename _Tp, typename _Up> | |
2190 | struct __common_type_impl | |
2191 | : private __do_common_type_impl | |
2192 | { | |
2193 | typedef decltype(_S_test<_Tp, _Up>(0)) type; | |
2194 | }; | |
2195 | ||
2196 | struct __do_member_type_wrapper | |
2197 | { | |
2198 | template<typename _Tp> | |
2199 | static __success_type<typename _Tp::type> _S_test(int); | |
2200 | ||
2201 | template<typename> | |
2202 | static __failure_type _S_test(...); | |
2203 | }; | |
2204 | ||
2205 | template<typename _Tp> | |
2206 | struct __member_type_wrapper | |
2207 | : private __do_member_type_wrapper | |
2208 | { | |
2209 | typedef decltype(_S_test<_Tp>(0)) type; | |
2210 | }; | |
2211 | ||
2212 | template<typename _CTp, typename... _Args> | |
2213 | struct __expanded_common_type_wrapper | |
2214 | { | |
2215 | typedef common_type<typename _CTp::type, _Args...> type; | |
2216 | }; | |
2217 | ||
2218 | template<typename... _Args> | |
2219 | struct __expanded_common_type_wrapper<__failure_type, _Args...> | |
2220 | { typedef __failure_type type; }; | |
2221 | ||
cfa9a96b CF |
2222 | template<typename _Tp> |
2223 | struct common_type<_Tp> | |
6c5173c0 | 2224 | { typedef typename decay<_Tp>::type type; }; |
cfa9a96b CF |
2225 | |
2226 | template<typename _Tp, typename _Up> | |
7274deff | 2227 | struct common_type<_Tp, _Up> |
b3618b71 DK |
2228 | : public __common_type_impl<_Tp, _Up>::type |
2229 | { }; | |
cfa9a96b CF |
2230 | |
2231 | template<typename _Tp, typename _Up, typename... _Vp> | |
2232 | struct common_type<_Tp, _Up, _Vp...> | |
b3618b71 DK |
2233 | : public __expanded_common_type_wrapper<typename __member_type_wrapper< |
2234 | common_type<_Tp, _Up>>::type, _Vp...>::type | |
2235 | { }; | |
7274deff | 2236 | |
13901e4b | 2237 | /// The underlying type of an enum. |
a47407f6 PC |
2238 | template<typename _Tp> |
2239 | struct underlying_type | |
2240 | { | |
2241 | typedef __underlying_type(_Tp) type; | |
2242 | }; | |
123c516a | 2243 | |
7274deff PC |
2244 | template<typename _Tp> |
2245 | struct __declval_protector | |
2246 | { | |
2247 | static const bool __stop = false; | |
2248 | static typename add_rvalue_reference<_Tp>::type __delegate(); | |
2249 | }; | |
2250 | ||
2251 | template<typename _Tp> | |
2252 | inline typename add_rvalue_reference<_Tp>::type | |
e4f32cb0 | 2253 | declval() noexcept |
7274deff PC |
2254 | { |
2255 | static_assert(__declval_protector<_Tp>::__stop, | |
2256 | "declval() must not be used!"); | |
2257 | return __declval_protector<_Tp>::__delegate(); | |
2258 | } | |
1041daba | 2259 | |
be7f7822 JW |
2260 | /// result_of |
2261 | template<typename _Signature> | |
2262 | class result_of; | |
2263 | ||
c0ffa2ba | 2264 | // Sfinae-friendly result_of implementation: |
83ddb39f | 2265 | |
a15f7cb8 ESR |
2266 | #define __cpp_lib_result_of_sfinae 201210 |
2267 | ||
93e95400 JW |
2268 | struct __invoke_memfun_ref { }; |
2269 | struct __invoke_memfun_deref { }; | |
2270 | struct __invoke_memobj_ref { }; | |
2271 | struct __invoke_memobj_deref { }; | |
2272 | struct __invoke_other { }; | |
2273 | ||
2274 | // Associate a tag type with a specialization of __success_type. | |
2275 | template<typename _Tp, typename _Tag> | |
2276 | struct __result_of_success : __success_type<_Tp> | |
2277 | { using __invoke_type = _Tag; }; | |
2278 | ||
83ddb39f DK |
2279 | // [func.require] paragraph 1 bullet 1: |
2280 | struct __result_of_memfun_ref_impl | |
2281 | { | |
2282 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2283 | static __result_of_success<decltype( |
83ddb39f | 2284 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2285 | ), __invoke_memfun_ref> _S_test(int); |
83ddb39f DK |
2286 | |
2287 | template<typename...> | |
2288 | static __failure_type _S_test(...); | |
2289 | }; | |
2290 | ||
2291 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2292 | struct __result_of_memfun_ref | |
2293 | : private __result_of_memfun_ref_impl | |
2294 | { | |
2295 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2296 | }; | |
2297 | ||
2298 | // [func.require] paragraph 1 bullet 2: | |
2299 | struct __result_of_memfun_deref_impl | |
2300 | { | |
2301 | template<typename _Fp, typename _Tp1, typename... _Args> | |
93e95400 | 2302 | static __result_of_success<decltype( |
83ddb39f | 2303 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
93e95400 | 2304 | ), __invoke_memfun_deref> _S_test(int); |
83ddb39f DK |
2305 | |
2306 | template<typename...> | |
2307 | static __failure_type _S_test(...); | |
2308 | }; | |
2309 | ||
2310 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2311 | struct __result_of_memfun_deref | |
2312 | : private __result_of_memfun_deref_impl | |
2313 | { | |
2314 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2315 | }; | |
2316 | ||
2317 | // [func.require] paragraph 1 bullet 3: | |
2318 | struct __result_of_memobj_ref_impl | |
2319 | { | |
2320 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2321 | static __result_of_success<decltype( |
83ddb39f | 2322 | std::declval<_Tp1>().*std::declval<_Fp>() |
93e95400 | 2323 | ), __invoke_memobj_ref> _S_test(int); |
83ddb39f DK |
2324 | |
2325 | template<typename, typename> | |
2326 | static __failure_type _S_test(...); | |
2327 | }; | |
2328 | ||
2329 | template<typename _MemPtr, typename _Arg> | |
2330 | struct __result_of_memobj_ref | |
2331 | : private __result_of_memobj_ref_impl | |
2332 | { | |
2333 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2334 | }; | |
2335 | ||
2336 | // [func.require] paragraph 1 bullet 4: | |
2337 | struct __result_of_memobj_deref_impl | |
2338 | { | |
2339 | template<typename _Fp, typename _Tp1> | |
93e95400 | 2340 | static __result_of_success<decltype( |
83ddb39f | 2341 | (*std::declval<_Tp1>()).*std::declval<_Fp>() |
93e95400 | 2342 | ), __invoke_memobj_deref> _S_test(int); |
83ddb39f DK |
2343 | |
2344 | template<typename, typename> | |
2345 | static __failure_type _S_test(...); | |
2346 | }; | |
2347 | ||
be7f7822 | 2348 | template<typename _MemPtr, typename _Arg> |
83ddb39f DK |
2349 | struct __result_of_memobj_deref |
2350 | : private __result_of_memobj_deref_impl | |
2351 | { | |
2352 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2353 | }; | |
2354 | ||
2355 | template<typename _MemPtr, typename _Arg> | |
2356 | struct __result_of_memobj; | |
be7f7822 JW |
2357 | |
2358 | template<typename _Res, typename _Class, typename _Arg> | |
83ddb39f | 2359 | struct __result_of_memobj<_Res _Class::*, _Arg> |
be7f7822 | 2360 | { |
83ddb39f DK |
2361 | typedef typename remove_cv<typename remove_reference< |
2362 | _Arg>::type>::type _Argval; | |
2363 | typedef _Res _Class::* _MemPtr; | |
2364 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2365 | is_base_of<_Class, _Argval>>::value, | |
2366 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2367 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2368 | >::type::type type; | |
be7f7822 JW |
2369 | }; |
2370 | ||
83ddb39f DK |
2371 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2372 | struct __result_of_memfun; | |
be7f7822 JW |
2373 | |
2374 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
83ddb39f | 2375 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
be7f7822 | 2376 | { |
83ddb39f DK |
2377 | typedef typename remove_cv<typename remove_reference< |
2378 | _Arg>::type>::type _Argval; | |
2379 | typedef _Res _Class::* _MemPtr; | |
2380 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2381 | is_base_of<_Class, _Argval>>::value, | |
2382 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, | |
2383 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2384 | >::type::type type; | |
be7f7822 JW |
2385 | }; |
2386 | ||
93e95400 JW |
2387 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2388 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper | |
2389 | // as the object expression | |
93e95400 JW |
2390 | |
2391 | template<typename _Res, typename _Class, typename _Arg> | |
2392 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>> | |
f3d7dd52 JW |
2393 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> |
2394 | { }; | |
93e95400 JW |
2395 | |
2396 | template<typename _Res, typename _Class, typename _Arg> | |
2397 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>&> | |
f3d7dd52 JW |
2398 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> |
2399 | { }; | |
2400 | ||
2401 | template<typename _Res, typename _Class, typename _Arg> | |
2402 | struct __result_of_memobj<_Res _Class::*, const reference_wrapper<_Arg>&> | |
2403 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
93e95400 JW |
2404 | { }; |
2405 | ||
2406 | template<typename _Res, typename _Class, typename _Arg> | |
2407 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>&&> | |
f3d7dd52 JW |
2408 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> |
2409 | { }; | |
2410 | ||
2411 | template<typename _Res, typename _Class, typename _Arg> | |
2412 | struct __result_of_memobj<_Res _Class::*, const reference_wrapper<_Arg>&&> | |
2413 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
93e95400 JW |
2414 | { }; |
2415 | ||
2416 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2417 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>, _Args...> | |
f3d7dd52 JW |
2418 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> |
2419 | { }; | |
93e95400 JW |
2420 | |
2421 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2422 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>&, | |
2423 | _Args...> | |
f3d7dd52 JW |
2424 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> |
2425 | { }; | |
2426 | ||
2427 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2428 | struct __result_of_memfun<_Res _Class::*, const reference_wrapper<_Arg>&, | |
2429 | _Args...> | |
2430 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
93e95400 JW |
2431 | { }; |
2432 | ||
2433 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2434 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>&&, | |
2435 | _Args...> | |
f3d7dd52 JW |
2436 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> |
2437 | { }; | |
2438 | ||
2439 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2440 | struct __result_of_memfun<_Res _Class::*, const reference_wrapper<_Arg>&&, | |
2441 | _Args...> | |
2442 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
93e95400 JW |
2443 | { }; |
2444 | ||
be7f7822 | 2445 | template<bool, bool, typename _Functor, typename... _ArgTypes> |
83ddb39f | 2446 | struct __result_of_impl |
be7f7822 | 2447 | { |
83ddb39f | 2448 | typedef __failure_type type; |
be7f7822 JW |
2449 | }; |
2450 | ||
2451 | template<typename _MemPtr, typename _Arg> | |
83ddb39f DK |
2452 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
2453 | : public __result_of_memobj<typename decay<_MemPtr>::type, _Arg> | |
c4db9a77 | 2454 | { }; |
be7f7822 | 2455 | |
83ddb39f DK |
2456 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2457 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
2458 | : public __result_of_memfun<typename decay<_MemPtr>::type, _Arg, _Args...> | |
c4db9a77 | 2459 | { }; |
be7f7822 | 2460 | |
83ddb39f DK |
2461 | // [func.require] paragraph 1 bullet 5: |
2462 | struct __result_of_other_impl | |
2463 | { | |
2464 | template<typename _Fn, typename... _Args> | |
93e95400 | 2465 | static __result_of_success<decltype( |
83ddb39f | 2466 | std::declval<_Fn>()(std::declval<_Args>()...) |
93e95400 | 2467 | ), __invoke_other> _S_test(int); |
83ddb39f DK |
2468 | |
2469 | template<typename...> | |
2470 | static __failure_type _S_test(...); | |
2471 | }; | |
2472 | ||
be7f7822 | 2473 | template<typename _Functor, typename... _ArgTypes> |
83ddb39f DK |
2474 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2475 | : private __result_of_other_impl | |
be7f7822 | 2476 | { |
83ddb39f | 2477 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
be7f7822 JW |
2478 | }; |
2479 | ||
83ddb39f DK |
2480 | template<typename _Functor, typename... _ArgTypes> |
2481 | struct result_of<_Functor(_ArgTypes...)> | |
2482 | : public __result_of_impl< | |
2483 | is_member_object_pointer< | |
2484 | typename remove_reference<_Functor>::type | |
2485 | >::value, | |
2486 | is_member_function_pointer< | |
2487 | typename remove_reference<_Functor>::type | |
2488 | >::value, | |
2489 | _Functor, _ArgTypes... | |
2490 | >::type | |
2491 | { }; | |
c0ffa2ba | 2492 | |
4457e88c JW |
2493 | #if __cplusplus > 201103L |
2494 | /// Alias template for aligned_storage | |
2495 | template<size_t _Len, size_t _Align = | |
2496 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2497 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2498 | ||
d3718027 RS |
2499 | template <size_t _Len, typename... _Types> |
2500 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2501 | ||
4457e88c JW |
2502 | /// Alias template for decay |
2503 | template<typename _Tp> | |
2504 | using decay_t = typename decay<_Tp>::type; | |
2505 | ||
2506 | /// Alias template for enable_if | |
2507 | template<bool _Cond, typename _Tp = void> | |
2508 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2509 | ||
2510 | /// Alias template for conditional | |
2511 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2512 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2513 | ||
2514 | /// Alias template for common_type | |
2515 | template<typename... _Tp> | |
2516 | using common_type_t = typename common_type<_Tp...>::type; | |
2517 | ||
2518 | /// Alias template for underlying_type | |
2519 | template<typename _Tp> | |
2520 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2521 | ||
2522 | /// Alias template for result_of | |
2523 | template<typename _Tp> | |
2524 | using result_of_t = typename result_of<_Tp>::type; | |
2525 | #endif | |
2526 | ||
847e9cf8 JW |
2527 | template<typename...> using __void_t = void; |
2528 | ||
bd1eb5e0 JW |
2529 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2530 | #define __cpp_lib_void_t 201411 | |
2531 | /// A metafunction that always yields void, used for detecting valid types. | |
2532 | template<typename...> using void_t = void; | |
2533 | #endif | |
2534 | ||
6af6bef4 JW |
2535 | /// Implementation of the detection idiom (negative case). |
2536 | template<typename _Default, typename _AlwaysVoid, | |
2537 | template<typename...> class _Op, typename... _Args> | |
2538 | struct __detector | |
2539 | { | |
2540 | using value_t = false_type; | |
2541 | using type = _Default; | |
2542 | }; | |
2543 | ||
2544 | /// Implementation of the detection idiom (positive case). | |
2545 | template<typename _Default, template<typename...> class _Op, | |
2546 | typename... _Args> | |
2547 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2548 | { | |
2549 | using value_t = true_type; | |
2550 | using type = _Op<_Args...>; | |
2551 | }; | |
2552 | ||
2553 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2554 | template<typename _Default, template<typename...> class _Op, | |
2555 | typename... _Args> | |
2556 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2557 | ||
2558 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2559 | template<typename _Default, template<typename...> class _Op, | |
2560 | typename... _Args> | |
2561 | using __detected_or_t | |
2562 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2563 | ||
2564 | // _Op<_Args...> if that is a valid type, otherwise _Default<_Args...>. | |
2565 | template<template<typename...> class _Default, | |
2566 | template<typename...> class _Op, typename... _Args> | |
2567 | using __detected_or_t_ = | |
2568 | __detected_or_t<_Default<_Args...>, _Op, _Args...>; | |
2569 | ||
c0ffa2ba | 2570 | /// @} group metaprogramming |
847e9cf8 | 2571 | |
033b71ce PC |
2572 | /** |
2573 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2574 | * member type _NTYPE. | |
2575 | */ | |
82b12c4b | 2576 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
847e9cf8 | 2577 | template<typename _Tp, typename = __void_t<>> \ |
82b12c4b | 2578 | struct __has_##_NTYPE \ |
847e9cf8 JW |
2579 | : false_type \ |
2580 | { }; \ | |
2581 | template<typename _Tp> \ | |
2582 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2583 | : true_type \ | |
033b71ce PC |
2584 | { }; |
2585 | ||
26b5ace7 DK |
2586 | template <typename _Tp> |
2587 | struct __is_swappable; | |
ddb63209 | 2588 | |
26b5ace7 DK |
2589 | template <typename _Tp> |
2590 | struct __is_nothrow_swappable; | |
ddb63209 VV |
2591 | |
2592 | template<typename _Tp> | |
2593 | inline | |
2594 | typename enable_if<__and_<is_move_constructible<_Tp>, | |
2595 | is_move_assignable<_Tp>>::value>::type | |
2596 | swap(_Tp&, _Tp&) | |
2597 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2598 | is_nothrow_move_assignable<_Tp>>::value); | |
2599 | ||
2600 | template<typename _Tp, size_t _Nm> | |
2601 | inline | |
26b5ace7 | 2602 | typename enable_if<__is_swappable<_Tp>::value>::type |
ddb63209 | 2603 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) |
26b5ace7 | 2604 | noexcept(__is_nothrow_swappable<_Tp>::value); |
ddb63209 | 2605 | |
26b5ace7 | 2606 | namespace __swappable_details { |
ddb63209 VV |
2607 | using std::swap; |
2608 | ||
26b5ace7 DK |
2609 | struct __do_is_swappable_impl |
2610 | { | |
2611 | template<typename _Tp, typename | |
2612 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> | |
2613 | static true_type __test(int); | |
2614 | ||
2615 | template<typename> | |
2616 | static false_type __test(...); | |
2617 | }; | |
2618 | ||
2619 | struct __do_is_nothrow_swappable_impl | |
2620 | { | |
2621 | template<typename _Tp> | |
2622 | static __bool_constant< | |
2623 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) | |
2624 | > __test(int); | |
2625 | ||
2626 | template<typename> | |
2627 | static false_type __test(...); | |
2628 | }; | |
2629 | ||
6b9539e2 | 2630 | } // namespace __swappable_details |
ddb63209 | 2631 | |
26b5ace7 DK |
2632 | template<typename _Tp> |
2633 | struct __is_swappable_impl | |
2634 | : public __swappable_details::__do_is_swappable_impl | |
2635 | { | |
2636 | typedef decltype(__test<_Tp>(0)) type; | |
2637 | }; | |
2638 | ||
2639 | template<typename _Tp> | |
ddb63209 | 2640 | struct __is_nothrow_swappable_impl |
26b5ace7 DK |
2641 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2642 | { | |
2643 | typedef decltype(__test<_Tp>(0)) type; | |
2644 | }; | |
ddb63209 | 2645 | |
26b5ace7 DK |
2646 | template<typename _Tp> |
2647 | struct __is_swappable | |
2648 | : public __is_swappable_impl<_Tp>::type | |
ddb63209 VV |
2649 | { }; |
2650 | ||
26b5ace7 | 2651 | template<typename _Tp> |
ddb63209 | 2652 | struct __is_nothrow_swappable |
26b5ace7 | 2653 | : public __is_nothrow_swappable_impl<_Tp>::type |
ddb63209 VV |
2654 | { }; |
2655 | ||
6b9539e2 DK |
2656 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2657 | #define __cpp_lib_is_swappable 201603 | |
2658 | /// Metafunctions used for detecting swappable types: p0185r1 | |
2659 | ||
2660 | /// is_swappable | |
2661 | template<typename _Tp> | |
2662 | struct is_swappable | |
2663 | : public __is_swappable_impl<_Tp>::type | |
2664 | { }; | |
2665 | ||
2666 | /// is_nothrow_swappable | |
2667 | template<typename _Tp> | |
2668 | struct is_nothrow_swappable | |
2669 | : public __is_nothrow_swappable_impl<_Tp>::type | |
2670 | { }; | |
2671 | ||
2672 | #if __cplusplus >= 201402L | |
2673 | /// is_swappable_v | |
2674 | template<typename _Tp> | |
2675 | constexpr bool is_swappable_v = is_swappable<_Tp>::value; | |
2676 | ||
2677 | /// is_nothrow_swappable_v | |
2678 | template<typename _Tp> | |
2679 | constexpr bool is_nothrow_swappable_v = is_nothrow_swappable<_Tp>::value; | |
2680 | #endif // __cplusplus >= 201402L | |
2681 | ||
2682 | namespace __swappable_with_details { | |
2683 | using std::swap; | |
2684 | ||
2685 | struct __do_is_swappable_with_impl | |
2686 | { | |
2687 | template<typename _Tp, typename _Up, typename | |
2688 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), | |
2689 | typename | |
2690 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> | |
2691 | static true_type __test(int); | |
2692 | ||
2693 | template<typename, typename> | |
2694 | static false_type __test(...); | |
2695 | }; | |
2696 | ||
2697 | struct __do_is_nothrow_swappable_with_impl | |
2698 | { | |
2699 | template<typename _Tp, typename _Up> | |
2700 | static __bool_constant< | |
2701 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) | |
2702 | && | |
2703 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) | |
2704 | > __test(int); | |
2705 | ||
2706 | template<typename, typename> | |
2707 | static false_type __test(...); | |
2708 | }; | |
2709 | ||
2710 | } // namespace __swappable_with_details | |
2711 | ||
2712 | template<typename _Tp, typename _Up> | |
2713 | struct __is_swappable_with_impl | |
2714 | : public __swappable_with_details::__do_is_swappable_with_impl | |
2715 | { | |
2716 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2717 | }; | |
2718 | ||
2719 | // Optimization for the homogenous lvalue case, not required: | |
2720 | template<typename _Tp> | |
2721 | struct __is_swappable_with_impl<_Tp&, _Tp&> | |
2722 | : public __swappable_details::__do_is_swappable_impl | |
2723 | { | |
2724 | typedef decltype(__test<_Tp&>(0)) type; | |
2725 | }; | |
2726 | ||
2727 | template<typename _Tp, typename _Up> | |
2728 | struct __is_nothrow_swappable_with_impl | |
2729 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl | |
2730 | { | |
2731 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2732 | }; | |
2733 | ||
2734 | // Optimization for the homogenous lvalue case, not required: | |
2735 | template<typename _Tp> | |
2736 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> | |
2737 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2738 | { | |
2739 | typedef decltype(__test<_Tp&>(0)) type; | |
2740 | }; | |
2741 | ||
2742 | /// is_swappable_with | |
2743 | template<typename _Tp, typename _Up> | |
2744 | struct is_swappable_with | |
2745 | : public __is_swappable_with_impl<_Tp, _Up>::type | |
2746 | { }; | |
2747 | ||
2748 | /// is_nothrow_swappable_with | |
2749 | template<typename _Tp, typename _Up> | |
2750 | struct is_nothrow_swappable_with | |
2751 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type | |
2752 | { }; | |
2753 | ||
2754 | #if __cplusplus >= 201402L | |
2755 | /// is_swappable_with_v | |
2756 | template<typename _Tp, typename _Up> | |
2757 | constexpr bool is_swappable_with_v = is_swappable_with<_Tp, _Up>::value; | |
2758 | ||
2759 | /// is_nothrow_swappable_with_v | |
2760 | template<typename _Tp, typename _Up> | |
2761 | constexpr bool is_nothrow_swappable_with_v = | |
2762 | is_nothrow_swappable_with<_Tp, _Up>::value; | |
2763 | #endif // __cplusplus >= 201402L | |
137422c8 VV |
2764 | |
2765 | #if __cplusplus > 201402L | |
2766 | template <typename _Tp> | |
2767 | constexpr bool is_void_v = is_void<_Tp>::value; | |
2768 | template <typename _Tp> | |
2769 | constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; | |
2770 | template <typename _Tp> | |
2771 | constexpr bool is_integral_v = is_integral<_Tp>::value; | |
2772 | template <typename _Tp> | |
2773 | constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; | |
2774 | template <typename _Tp> | |
2775 | constexpr bool is_array_v = is_array<_Tp>::value; | |
2776 | template <typename _Tp> | |
2777 | constexpr bool is_pointer_v = is_pointer<_Tp>::value; | |
2778 | template <typename _Tp> | |
2779 | constexpr bool is_lvalue_reference_v = is_lvalue_reference<_Tp>::value; | |
2780 | template <typename _Tp> | |
2781 | constexpr bool is_rvalue_reference_v = is_rvalue_reference<_Tp>::value; | |
2782 | template <typename _Tp> | |
2783 | constexpr bool is_member_object_pointer_v = | |
2784 | is_member_object_pointer<_Tp>::value; | |
2785 | template <typename _Tp> | |
2786 | constexpr bool is_member_function_pointer_v = | |
2787 | is_member_function_pointer<_Tp>::value; | |
2788 | template <typename _Tp> | |
2789 | constexpr bool is_enum_v = is_enum<_Tp>::value; | |
2790 | template <typename _Tp> | |
2791 | constexpr bool is_union_v = is_union<_Tp>::value; | |
2792 | template <typename _Tp> | |
2793 | constexpr bool is_class_v = is_class<_Tp>::value; | |
2794 | template <typename _Tp> | |
2795 | constexpr bool is_function_v = is_function<_Tp>::value; | |
2796 | template <typename _Tp> | |
2797 | constexpr bool is_reference_v = is_reference<_Tp>::value; | |
2798 | template <typename _Tp> | |
2799 | constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; | |
2800 | template <typename _Tp> | |
2801 | constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; | |
2802 | template <typename _Tp> | |
2803 | constexpr bool is_object_v = is_object<_Tp>::value; | |
2804 | template <typename _Tp> | |
2805 | constexpr bool is_scalar_v = is_scalar<_Tp>::value; | |
2806 | template <typename _Tp> | |
2807 | constexpr bool is_compound_v = is_compound<_Tp>::value; | |
2808 | template <typename _Tp> | |
2809 | constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; | |
2810 | template <typename _Tp> | |
2811 | constexpr bool is_const_v = is_const<_Tp>::value; | |
2812 | template <typename _Tp> | |
2813 | constexpr bool is_volatile_v = is_volatile<_Tp>::value; | |
2814 | template <typename _Tp> | |
2815 | constexpr bool is_trivial_v = is_trivial<_Tp>::value; | |
2816 | template <typename _Tp> | |
2817 | constexpr bool is_trivially_copyable_v = is_trivially_copyable<_Tp>::value; | |
2818 | template <typename _Tp> | |
2819 | constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; | |
2820 | template <typename _Tp> | |
2821 | constexpr bool is_pod_v = is_pod<_Tp>::value; | |
2822 | template <typename _Tp> | |
2823 | constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; | |
2824 | template <typename _Tp> | |
2825 | constexpr bool is_empty_v = is_empty<_Tp>::value; | |
2826 | template <typename _Tp> | |
2827 | constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; | |
2828 | template <typename _Tp> | |
2829 | constexpr bool is_abstract_v = is_abstract<_Tp>::value; | |
2830 | template <typename _Tp> | |
2831 | constexpr bool is_final_v = is_final<_Tp>::value; | |
2832 | template <typename _Tp> | |
2833 | constexpr bool is_signed_v = is_signed<_Tp>::value; | |
2834 | template <typename _Tp> | |
2835 | constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; | |
2836 | template <typename _Tp, typename... _Args> | |
2837 | constexpr bool is_constructible_v = is_constructible<_Tp, _Args...>::value; | |
2838 | template <typename _Tp> | |
2839 | constexpr bool is_default_constructible_v = | |
2840 | is_default_constructible<_Tp>::value; | |
2841 | template <typename _Tp> | |
2842 | constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value; | |
2843 | template <typename _Tp> | |
2844 | constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value; | |
2845 | template <typename _Tp, typename _Up> | |
2846 | constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; | |
2847 | template <typename _Tp> | |
2848 | constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; | |
2849 | template <typename _Tp> | |
2850 | constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; | |
2851 | template <typename _Tp> | |
2852 | constexpr bool is_destructible_v = is_destructible<_Tp>::value; | |
2853 | template <typename _Tp, typename... _Args> | |
2854 | constexpr bool is_trivially_constructible_v = | |
2855 | is_trivially_constructible<_Tp, _Args...>::value; | |
2856 | template <typename _Tp> | |
2857 | constexpr bool is_trivially_default_constructible_v = | |
2858 | is_trivially_default_constructible<_Tp>::value; | |
2859 | template <typename _Tp> | |
2860 | constexpr bool is_trivially_copy_constructible_v = | |
2861 | is_trivially_copy_constructible<_Tp>::value; | |
2862 | template <typename _Tp> | |
2863 | constexpr bool is_trivially_move_constructible_v = | |
2864 | is_trivially_move_constructible<_Tp>::value; | |
2865 | template <typename _Tp, typename _Up> | |
2866 | constexpr bool is_trivially_assignable_v = | |
2867 | is_trivially_assignable<_Tp, _Up>::value; | |
2868 | template <typename _Tp> | |
2869 | constexpr bool is_trivially_copy_assignable_v = | |
2870 | is_trivially_copy_assignable<_Tp>::value; | |
2871 | template <typename _Tp> | |
2872 | constexpr bool is_trivially_move_assignable_v = | |
2873 | is_trivially_move_assignable<_Tp>::value; | |
2874 | template <typename _Tp> | |
2875 | constexpr bool is_trivially_destructible_v = | |
2876 | is_trivially_destructible<_Tp>::value; | |
2877 | template <typename _Tp, typename... _Args> | |
2878 | constexpr bool is_nothrow_constructible_v = | |
2879 | is_nothrow_constructible<_Tp, _Args...>::value; | |
2880 | template <typename _Tp> | |
2881 | constexpr bool is_nothrow_default_constructible_v = | |
2882 | is_nothrow_default_constructible<_Tp>::value; | |
2883 | template <typename _Tp> | |
2884 | constexpr bool is_nothrow_copy_constructible_v = | |
2885 | is_nothrow_copy_constructible<_Tp>::value; | |
2886 | template <typename _Tp> | |
2887 | constexpr bool is_nothrow_move_constructible_v = | |
2888 | is_nothrow_move_constructible<_Tp>::value; | |
2889 | template <typename _Tp, typename _Up> | |
2890 | constexpr bool is_nothrow_assignable_v = | |
2891 | is_nothrow_assignable<_Tp, _Up>::value; | |
2892 | template <typename _Tp> | |
2893 | constexpr bool is_nothrow_copy_assignable_v = | |
2894 | is_nothrow_copy_assignable<_Tp>::value; | |
2895 | template <typename _Tp> | |
2896 | constexpr bool is_nothrow_move_assignable_v = | |
2897 | is_nothrow_move_assignable<_Tp>::value; | |
2898 | template <typename _Tp> | |
2899 | constexpr bool is_nothrow_destructible_v = | |
2900 | is_nothrow_destructible<_Tp>::value; | |
2901 | template <typename _Tp> | |
2902 | constexpr bool has_virtual_destructor_v = | |
2903 | has_virtual_destructor<_Tp>::value; | |
2904 | template <typename _Tp> | |
2905 | constexpr size_t alignment_of_v = alignment_of<_Tp>::value; | |
2906 | template <typename _Tp> | |
2907 | constexpr size_t rank_v = rank<_Tp>::value; | |
2908 | template <typename _Tp, unsigned _Idx = 0> | |
2909 | constexpr size_t extent_v = extent<_Tp, _Idx>::value; | |
2910 | template <typename _Tp, typename _Up> | |
2911 | constexpr bool is_same_v = is_same<_Tp, _Up>::value; | |
2912 | template <typename _Base, typename _Derived> | |
2913 | constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; | |
2914 | template <typename _From, typename _To> | |
2915 | constexpr bool is_convertible_v = is_convertible<_From, _To>::value; | |
2916 | #endif // C++17 | |
6b9539e2 DK |
2917 | #endif |
2918 | ||
12ffa228 | 2919 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 2920 | } // namespace std |
7b50cdef | 2921 | |
734f5023 | 2922 | #endif // C++11 |
57317d2a | 2923 | |
7274deff | 2924 | #endif // _GLIBCXX_TYPE_TRAITS |