1 | // C++11 <type_traits> -*- C++ -*- |
2 | |
3 | // Copyright (C) 2007-2017 Free Software Foundation, Inc. |
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 |
8 | // Free Software Foundation; either version 3, or (at your option) |
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 | |
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/>. |
24 | |
25 | /** @file include/type_traits |
26 | * This is a Standard C++ Library header. |
27 | */ |
28 | |
29 | #ifndef _GLIBCXX_TYPE_TRAITS |
30 | #define _GLIBCXX_TYPE_TRAITS 1 |
31 | |
32 | #pragma GCC system_header |
33 | |
34 | #if __cplusplus < 201103L |
35 | # include <bits/c++0x_warning.h> |
36 | #else |
37 | |
38 | #include <bits/c++config.h> |
39 | |
40 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
41 | # if defined (__UINT_LEAST16_TYPE__) && defined(__UINT_LEAST32_TYPE__) |
42 | namespace std |
43 | { |
44 | typedef __UINT_LEAST16_TYPE__ uint_least16_t; |
45 | typedef __UINT_LEAST32_TYPE__ uint_least32_t; |
46 | } |
47 | # else |
48 | # include <cstdint> |
49 | # endif |
50 | #endif |
51 | |
52 | namespace std _GLIBCXX_VISIBILITY(default) |
53 | { |
54 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
55 | |
56 | /** |
57 | * @defgroup metaprogramming Metaprogramming |
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 | * |
64 | * @{ |
65 | */ |
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; |
74 | constexpr operator value_type() const noexcept { return value; } |
75 | #if __cplusplus > 201103L |
76 | |
77 | #define __cpp_lib_integral_constant_callable 201304 |
78 | |
79 | constexpr value_type operator()() const noexcept { return value; } |
80 | #endif |
81 | }; |
82 | |
83 | template<typename _Tp, _Tp __v> |
84 | constexpr _Tp integral_constant<_Tp, __v>::value; |
85 | |
86 | /// The type used as a compile-time boolean with true value. |
87 | typedef integral_constant<bool, true> true_type; |
88 | |
89 | /// The type used as a compile-time boolean with false value. |
90 | typedef integral_constant<bool, false> false_type; |
91 | |
92 | template<bool __v> |
93 | using __bool_constant = integral_constant<bool, __v>; |
94 | |
95 | #if __cplusplus > 201402L |
96 | # define __cpp_lib_bool_constant 201505 |
97 | template<bool __v> |
98 | using bool_constant = integral_constant<bool, __v>; |
99 | #endif |
100 | |
101 | // Meta programming helper types. |
102 | |
103 | template<bool, typename, typename> |
104 | struct conditional; |
105 | |
106 | template<typename...> |
107 | struct __or_; |
108 | |
109 | template<> |
110 | struct __or_<> |
111 | : public false_type |
112 | { }; |
113 | |
114 | template<typename _B1> |
115 | struct __or_<_B1> |
116 | : public _B1 |
117 | { }; |
118 | |
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 | { }; |
128 | |
129 | template<typename...> |
130 | struct __and_; |
131 | |
132 | template<> |
133 | struct __and_<> |
134 | : public true_type |
135 | { }; |
136 | |
137 | template<typename _B1> |
138 | struct __and_<_B1> |
139 | : public _B1 |
140 | { }; |
141 | |
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 __bool_constant<!bool(_Pp::value)> |
155 | { }; |
156 | |
157 | #if __cplusplus >= 201703L |
158 | |
159 | #define __cpp_lib_logical_traits 201510 |
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 | { }; |
175 | |
176 | template<typename... _Bn> |
177 | inline constexpr bool conjunction_v = conjunction<_Bn...>::value; |
178 | |
179 | template<typename... _Bn> |
180 | inline constexpr bool disjunction_v = disjunction<_Bn...>::value; |
181 | |
182 | template<typename _Pp> |
183 | inline constexpr bool negation_v = negation<_Pp>::value; |
184 | |
185 | #endif // C++17 |
186 | |
187 | // For several sfinae-friendly trait implementations we transport both the |
188 | // result information (as the member type) and the failure information (no |
189 | // member type). This is very similar to std::enable_if, but we cannot use |
190 | // them, because we need to derive from them as an implementation detail. |
191 | |
192 | template<typename _Tp> |
193 | struct __success_type |
194 | { typedef _Tp type; }; |
195 | |
196 | struct __failure_type |
197 | { }; |
198 | |
199 | // Primary type categories. |
200 | |
201 | template<typename> |
202 | struct remove_cv; |
203 | |
204 | template<typename> |
205 | struct __is_void_helper |
206 | : public false_type { }; |
207 | |
208 | template<> |
209 | struct __is_void_helper<void> |
210 | : public true_type { }; |
211 | |
212 | /// is_void |
213 | template<typename _Tp> |
214 | struct is_void |
215 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
216 | { }; |
217 | |
218 | template<typename> |
219 | struct __is_integral_helper |
220 | : public false_type { }; |
221 | |
222 | template<> |
223 | struct __is_integral_helper<bool> |
224 | : public true_type { }; |
225 | |
226 | template<> |
227 | struct __is_integral_helper<char> |
228 | : public true_type { }; |
229 | |
230 | template<> |
231 | struct __is_integral_helper<signed char> |
232 | : public true_type { }; |
233 | |
234 | template<> |
235 | struct __is_integral_helper<unsigned char> |
236 | : public true_type { }; |
237 | |
238 | #ifdef _GLIBCXX_USE_WCHAR_T |
239 | template<> |
240 | struct __is_integral_helper<wchar_t> |
241 | : public true_type { }; |
242 | #endif |
243 | |
244 | template<> |
245 | struct __is_integral_helper<char16_t> |
246 | : public true_type { }; |
247 | |
248 | template<> |
249 | struct __is_integral_helper<char32_t> |
250 | : public true_type { }; |
251 | |
252 | template<> |
253 | struct __is_integral_helper<short> |
254 | : public true_type { }; |
255 | |
256 | template<> |
257 | struct __is_integral_helper<unsigned short> |
258 | : public true_type { }; |
259 | |
260 | template<> |
261 | struct __is_integral_helper<int> |
262 | : public true_type { }; |
263 | |
264 | template<> |
265 | struct __is_integral_helper<unsigned int> |
266 | : public true_type { }; |
267 | |
268 | template<> |
269 | struct __is_integral_helper<long> |
270 | : public true_type { }; |
271 | |
272 | template<> |
273 | struct __is_integral_helper<unsigned long> |
274 | : public true_type { }; |
275 | |
276 | template<> |
277 | struct __is_integral_helper<long long> |
278 | : public true_type { }; |
279 | |
280 | template<> |
281 | struct __is_integral_helper<unsigned long long> |
282 | : public true_type { }; |
283 | |
284 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
285 | // uses one of these types for size_t. |
286 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
287 | template<> |
288 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
289 | : public true_type { }; |
290 | |
291 | template<> |
292 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
293 | : public true_type { }; |
294 | #endif |
295 | #if defined(__GLIBCXX_TYPE_INT_N_1) |
296 | template<> |
297 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> |
298 | : public true_type { }; |
299 | |
300 | template<> |
301 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> |
302 | : public true_type { }; |
303 | #endif |
304 | #if defined(__GLIBCXX_TYPE_INT_N_2) |
305 | template<> |
306 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> |
307 | : public true_type { }; |
308 | |
309 | template<> |
310 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> |
311 | : public true_type { }; |
312 | #endif |
313 | #if defined(__GLIBCXX_TYPE_INT_N_3) |
314 | template<> |
315 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> |
316 | : public true_type { }; |
317 | |
318 | template<> |
319 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> |
320 | : public true_type { }; |
321 | #endif |
322 | |
323 | /// is_integral |
324 | template<typename _Tp> |
325 | struct is_integral |
326 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
327 | { }; |
328 | |
329 | template<typename> |
330 | struct __is_floating_point_helper |
331 | : public false_type { }; |
332 | |
333 | template<> |
334 | struct __is_floating_point_helper<float> |
335 | : public true_type { }; |
336 | |
337 | template<> |
338 | struct __is_floating_point_helper<double> |
339 | : public true_type { }; |
340 | |
341 | template<> |
342 | struct __is_floating_point_helper<long double> |
343 | : public true_type { }; |
344 | |
345 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) && !defined(__CUDACC__) |
346 | template<> |
347 | struct __is_floating_point_helper<__float128> |
348 | : public true_type { }; |
349 | #endif |
350 | |
351 | /// is_floating_point |
352 | template<typename _Tp> |
353 | struct is_floating_point |
354 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
355 | { }; |
356 | |
357 | /// is_array |
358 | template<typename> |
359 | struct is_array |
360 | : public false_type { }; |
361 | |
362 | template<typename _Tp, std::size_t _Size> |
363 | struct is_array<_Tp[_Size]> |
364 | : public true_type { }; |
365 | |
366 | template<typename _Tp> |
367 | struct is_array<_Tp[]> |
368 | : public true_type { }; |
369 | |
370 | template<typename> |
371 | struct __is_pointer_helper |
372 | : public false_type { }; |
373 | |
374 | template<typename _Tp> |
375 | struct __is_pointer_helper<_Tp*> |
376 | : public true_type { }; |
377 | |
378 | /// is_pointer |
379 | template<typename _Tp> |
380 | struct is_pointer |
381 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
382 | { }; |
383 | |
384 | /// is_lvalue_reference |
385 | template<typename> |
386 | struct is_lvalue_reference |
387 | : public false_type { }; |
388 | |
389 | template<typename _Tp> |
390 | struct is_lvalue_reference<_Tp&> |
391 | : public true_type { }; |
392 | |
393 | /// is_rvalue_reference |
394 | template<typename> |
395 | struct is_rvalue_reference |
396 | : public false_type { }; |
397 | |
398 | template<typename _Tp> |
399 | struct is_rvalue_reference<_Tp&&> |
400 | : public true_type { }; |
401 | |
402 | template<typename> |
403 | struct is_function; |
404 | |
405 | template<typename> |
406 | struct __is_member_object_pointer_helper |
407 | : public false_type { }; |
408 | |
409 | template<typename _Tp, typename _Cp> |
410 | struct __is_member_object_pointer_helper<_Tp _Cp::*> |
411 | : public integral_constant<bool, !is_function<_Tp>::value> { }; |
412 | |
413 | /// is_member_object_pointer |
414 | template<typename _Tp> |
415 | struct is_member_object_pointer |
416 | : public __is_member_object_pointer_helper< |
417 | typename remove_cv<_Tp>::type>::type |
418 | { }; |
419 | |
420 | template<typename> |
421 | struct __is_member_function_pointer_helper |
422 | : public false_type { }; |
423 | |
424 | template<typename _Tp, typename _Cp> |
425 | struct __is_member_function_pointer_helper<_Tp _Cp::*> |
426 | : public integral_constant<bool, is_function<_Tp>::value> { }; |
427 | |
428 | /// is_member_function_pointer |
429 | template<typename _Tp> |
430 | struct is_member_function_pointer |
431 | : public __is_member_function_pointer_helper< |
432 | typename remove_cv<_Tp>::type>::type |
433 | { }; |
434 | |
435 | /// is_enum |
436 | template<typename _Tp> |
437 | struct is_enum |
438 | : public integral_constant<bool, __is_enum(_Tp)> |
439 | { }; |
440 | |
441 | /// is_union |
442 | template<typename _Tp> |
443 | struct is_union |
444 | : public integral_constant<bool, __is_union(_Tp)> |
445 | { }; |
446 | |
447 | /// is_class |
448 | template<typename _Tp> |
449 | struct is_class |
450 | : public integral_constant<bool, __is_class(_Tp)> |
451 | { }; |
452 | |
453 | /// is_function |
454 | template<typename> |
455 | struct is_function |
456 | : public false_type { }; |
457 | |
458 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
459 | struct is_function<_Res(_ArgTypes...) _GLIBCXX_NOEXCEPT_QUAL> |
460 | : public true_type { }; |
461 | |
462 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
463 | struct is_function<_Res(_ArgTypes...) & _GLIBCXX_NOEXCEPT_QUAL> |
464 | : public true_type { }; |
465 | |
466 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
467 | struct is_function<_Res(_ArgTypes...) && _GLIBCXX_NOEXCEPT_QUAL> |
468 | : public true_type { }; |
469 | |
470 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
471 | struct is_function<_Res(_ArgTypes......) _GLIBCXX_NOEXCEPT_QUAL> |
472 | : public true_type { }; |
473 | |
474 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
475 | struct is_function<_Res(_ArgTypes......) & _GLIBCXX_NOEXCEPT_QUAL> |
476 | : public true_type { }; |
477 | |
478 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
479 | struct is_function<_Res(_ArgTypes......) && _GLIBCXX_NOEXCEPT_QUAL> |
480 | : public true_type { }; |
481 | |
482 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
483 | struct is_function<_Res(_ArgTypes...) const _GLIBCXX_NOEXCEPT_QUAL> |
484 | : public true_type { }; |
485 | |
486 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
487 | struct is_function<_Res(_ArgTypes...) const & _GLIBCXX_NOEXCEPT_QUAL> |
488 | : public true_type { }; |
489 | |
490 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
491 | struct is_function<_Res(_ArgTypes...) const && _GLIBCXX_NOEXCEPT_QUAL> |
492 | : public true_type { }; |
493 | |
494 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
495 | struct is_function<_Res(_ArgTypes......) const _GLIBCXX_NOEXCEPT_QUAL> |
496 | : public true_type { }; |
497 | |
498 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
499 | struct is_function<_Res(_ArgTypes......) const & _GLIBCXX_NOEXCEPT_QUAL> |
500 | : public true_type { }; |
501 | |
502 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
503 | struct is_function<_Res(_ArgTypes......) const && _GLIBCXX_NOEXCEPT_QUAL> |
504 | : public true_type { }; |
505 | |
506 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
507 | struct is_function<_Res(_ArgTypes...) volatile _GLIBCXX_NOEXCEPT_QUAL> |
508 | : public true_type { }; |
509 | |
510 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
511 | struct is_function<_Res(_ArgTypes...) volatile & _GLIBCXX_NOEXCEPT_QUAL> |
512 | : public true_type { }; |
513 | |
514 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
515 | struct is_function<_Res(_ArgTypes...) volatile && _GLIBCXX_NOEXCEPT_QUAL> |
516 | : public true_type { }; |
517 | |
518 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
519 | struct is_function<_Res(_ArgTypes......) volatile _GLIBCXX_NOEXCEPT_QUAL> |
520 | : public true_type { }; |
521 | |
522 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
523 | struct is_function<_Res(_ArgTypes......) volatile & _GLIBCXX_NOEXCEPT_QUAL> |
524 | : public true_type { }; |
525 | |
526 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
527 | struct is_function<_Res(_ArgTypes......) volatile && _GLIBCXX_NOEXCEPT_QUAL> |
528 | : public true_type { }; |
529 | |
530 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
531 | struct is_function<_Res(_ArgTypes...) const volatile _GLIBCXX_NOEXCEPT_QUAL> |
532 | : public true_type { }; |
533 | |
534 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
535 | struct is_function<_Res(_ArgTypes...) const volatile & _GLIBCXX_NOEXCEPT_QUAL> |
536 | : public true_type { }; |
537 | |
538 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
539 | struct is_function<_Res(_ArgTypes...) const volatile && _GLIBCXX_NOEXCEPT_QUAL> |
540 | : public true_type { }; |
541 | |
542 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
543 | struct is_function<_Res(_ArgTypes......) const volatile _GLIBCXX_NOEXCEPT_QUAL> |
544 | : public true_type { }; |
545 | |
546 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
547 | struct is_function<_Res(_ArgTypes......) const volatile & _GLIBCXX_NOEXCEPT_QUAL> |
548 | : public true_type { }; |
549 | |
550 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
551 | struct is_function<_Res(_ArgTypes......) const volatile && _GLIBCXX_NOEXCEPT_QUAL> |
552 | : public true_type { }; |
553 | |
554 | #define __cpp_lib_is_null_pointer 201309 |
555 | |
556 | template<typename> |
557 | struct __is_null_pointer_helper |
558 | : public false_type { }; |
559 | |
560 | template<> |
561 | struct __is_null_pointer_helper<std::nullptr_t> |
562 | : public true_type { }; |
563 | |
564 | /// is_null_pointer (LWG 2247). |
565 | template<typename _Tp> |
566 | struct is_null_pointer |
567 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type |
568 | { }; |
569 | |
570 | /// __is_nullptr_t (extension). |
571 | template<typename _Tp> |
572 | struct __is_nullptr_t |
573 | : public is_null_pointer<_Tp> |
574 | { }; |
575 | |
576 | // Composite type categories. |
577 | |
578 | /// is_reference |
579 | template<typename _Tp> |
580 | struct is_reference |
581 | : public __or_<is_lvalue_reference<_Tp>, |
582 | is_rvalue_reference<_Tp>>::type |
583 | { }; |
584 | |
585 | /// is_arithmetic |
586 | template<typename _Tp> |
587 | struct is_arithmetic |
588 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
589 | { }; |
590 | |
591 | /// is_fundamental |
592 | template<typename _Tp> |
593 | struct is_fundamental |
594 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
595 | is_null_pointer<_Tp>>::type |
596 | { }; |
597 | |
598 | /// is_object |
599 | template<typename _Tp> |
600 | struct is_object |
601 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
602 | is_void<_Tp>>>::type |
603 | { }; |
604 | |
605 | template<typename> |
606 | struct is_member_pointer; |
607 | |
608 | /// is_scalar |
609 | template<typename _Tp> |
610 | struct is_scalar |
611 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
612 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
613 | { }; |
614 | |
615 | /// is_compound |
616 | template<typename _Tp> |
617 | struct is_compound |
618 | : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; |
619 | |
620 | template<typename _Tp> |
621 | struct __is_member_pointer_helper |
622 | : public false_type { }; |
623 | |
624 | template<typename _Tp, typename _Cp> |
625 | struct __is_member_pointer_helper<_Tp _Cp::*> |
626 | : public true_type { }; |
627 | |
628 | /// is_member_pointer |
629 | template<typename _Tp> |
630 | struct is_member_pointer |
631 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
632 | { }; |
633 | |
634 | // Utility to detect referenceable types ([defns.referenceable]). |
635 | |
636 | template<typename _Tp> |
637 | struct __is_referenceable |
638 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type |
639 | { }; |
640 | |
641 | template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM> |
642 | struct __is_referenceable<_Res(_Args...) _GLIBCXX_NOEXCEPT_QUAL> |
643 | : public true_type |
644 | { }; |
645 | |
646 | template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM> |
647 | struct __is_referenceable<_Res(_Args......) _GLIBCXX_NOEXCEPT_QUAL> |
648 | : public true_type |
649 | { }; |
650 | |
651 | // Type properties. |
652 | |
653 | /// is_const |
654 | template<typename> |
655 | struct is_const |
656 | : public false_type { }; |
657 | |
658 | template<typename _Tp> |
659 | struct is_const<_Tp const> |
660 | : public true_type { }; |
661 | |
662 | /// is_volatile |
663 | template<typename> |
664 | struct is_volatile |
665 | : public false_type { }; |
666 | |
667 | template<typename _Tp> |
668 | struct is_volatile<_Tp volatile> |
669 | : public true_type { }; |
670 | |
671 | /// is_trivial |
672 | template<typename _Tp> |
673 | struct is_trivial |
674 | : public integral_constant<bool, __is_trivial(_Tp)> |
675 | { }; |
676 | |
677 | // is_trivially_copyable |
678 | template<typename _Tp> |
679 | struct is_trivially_copyable |
680 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> |
681 | { }; |
682 | |
683 | /// is_standard_layout |
684 | template<typename _Tp> |
685 | struct is_standard_layout |
686 | : public integral_constant<bool, __is_standard_layout(_Tp)> |
687 | { }; |
688 | |
689 | /// is_pod |
690 | // Could use is_standard_layout && is_trivial instead of the builtin. |
691 | template<typename _Tp> |
692 | struct is_pod |
693 | : public integral_constant<bool, __is_pod(_Tp)> |
694 | { }; |
695 | |
696 | /// is_literal_type |
697 | template<typename _Tp> |
698 | struct is_literal_type |
699 | : public integral_constant<bool, __is_literal_type(_Tp)> |
700 | { }; |
701 | |
702 | /// is_empty |
703 | template<typename _Tp> |
704 | struct is_empty |
705 | : public integral_constant<bool, __is_empty(_Tp)> |
706 | { }; |
707 | |
708 | /// is_polymorphic |
709 | template<typename _Tp> |
710 | struct is_polymorphic |
711 | : public integral_constant<bool, __is_polymorphic(_Tp)> |
712 | { }; |
713 | |
714 | #if __cplusplus >= 201402L |
715 | #define __cpp_lib_is_final 201402L |
716 | /// is_final |
717 | template<typename _Tp> |
718 | struct is_final |
719 | : public integral_constant<bool, __is_final(_Tp)> |
720 | { }; |
721 | #endif |
722 | |
723 | /// is_abstract |
724 | template<typename _Tp> |
725 | struct is_abstract |
726 | : public integral_constant<bool, __is_abstract(_Tp)> |
727 | { }; |
728 | |
729 | template<typename _Tp, |
730 | bool = is_arithmetic<_Tp>::value> |
731 | struct __is_signed_helper |
732 | : public false_type { }; |
733 | |
734 | template<typename _Tp> |
735 | struct __is_signed_helper<_Tp, true> |
736 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> |
737 | { }; |
738 | |
739 | /// is_signed |
740 | template<typename _Tp> |
741 | struct is_signed |
742 | : public __is_signed_helper<_Tp>::type |
743 | { }; |
744 | |
745 | /// is_unsigned |
746 | template<typename _Tp> |
747 | struct is_unsigned |
748 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> |
749 | { }; |
750 | |
751 | |
752 | // Destructible and constructible type properties. |
753 | |
754 | template<typename> |
755 | struct add_rvalue_reference; |
756 | |
757 | /** |
758 | * @brief Utility to simplify expressions used in unevaluated operands |
759 | * @ingroup utilities |
760 | */ |
761 | template<typename _Tp> |
762 | typename add_rvalue_reference<_Tp>::type declval() noexcept; |
763 | |
764 | template<typename, unsigned = 0> |
765 | struct extent; |
766 | |
767 | template<typename> |
768 | struct remove_all_extents; |
769 | |
770 | template<typename _Tp> |
771 | struct __is_array_known_bounds |
772 | : public integral_constant<bool, (extent<_Tp>::value > 0)> |
773 | { }; |
774 | |
775 | template<typename _Tp> |
776 | struct __is_array_unknown_bounds |
777 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> |
778 | { }; |
779 | |
780 | // In N3290 is_destructible does not say anything about function |
781 | // types and abstract types, see LWG 2049. This implementation |
782 | // describes function types as non-destructible and all complete |
783 | // object types as destructible, iff the explicit destructor |
784 | // call expression is wellformed. |
785 | struct __do_is_destructible_impl |
786 | { |
787 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
788 | static true_type __test(int); |
789 | |
790 | template<typename> |
791 | static false_type __test(...); |
792 | }; |
793 | |
794 | template<typename _Tp> |
795 | struct __is_destructible_impl |
796 | : public __do_is_destructible_impl |
797 | { |
798 | typedef decltype(__test<_Tp>(0)) type; |
799 | }; |
800 | |
801 | template<typename _Tp, |
802 | bool = __or_<is_void<_Tp>, |
803 | __is_array_unknown_bounds<_Tp>, |
804 | is_function<_Tp>>::value, |
805 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> |
806 | struct __is_destructible_safe; |
807 | |
808 | template<typename _Tp> |
809 | struct __is_destructible_safe<_Tp, false, false> |
810 | : public __is_destructible_impl<typename |
811 | remove_all_extents<_Tp>::type>::type |
812 | { }; |
813 | |
814 | template<typename _Tp> |
815 | struct __is_destructible_safe<_Tp, true, false> |
816 | : public false_type { }; |
817 | |
818 | template<typename _Tp> |
819 | struct __is_destructible_safe<_Tp, false, true> |
820 | : public true_type { }; |
821 | |
822 | /// is_destructible |
823 | template<typename _Tp> |
824 | struct is_destructible |
825 | : public __is_destructible_safe<_Tp>::type |
826 | { }; |
827 | |
828 | // is_nothrow_destructible requires that is_destructible is |
829 | // satisfied as well. We realize that by mimicing the |
830 | // implementation of is_destructible but refer to noexcept(expr) |
831 | // instead of decltype(expr). |
832 | struct __do_is_nt_destructible_impl |
833 | { |
834 | template<typename _Tp> |
835 | static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())> |
836 | __test(int); |
837 | |
838 | template<typename> |
839 | static false_type __test(...); |
840 | }; |
841 | |
842 | template<typename _Tp> |
843 | struct __is_nt_destructible_impl |
844 | : public __do_is_nt_destructible_impl |
845 | { |
846 | typedef decltype(__test<_Tp>(0)) type; |
847 | }; |
848 | |
849 | template<typename _Tp, |
850 | bool = __or_<is_void<_Tp>, |
851 | __is_array_unknown_bounds<_Tp>, |
852 | is_function<_Tp>>::value, |
853 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> |
854 | struct __is_nt_destructible_safe; |
855 | |
856 | template<typename _Tp> |
857 | struct __is_nt_destructible_safe<_Tp, false, false> |
858 | : public __is_nt_destructible_impl<typename |
859 | remove_all_extents<_Tp>::type>::type |
860 | { }; |
861 | |
862 | template<typename _Tp> |
863 | struct __is_nt_destructible_safe<_Tp, true, false> |
864 | : public false_type { }; |
865 | |
866 | template<typename _Tp> |
867 | struct __is_nt_destructible_safe<_Tp, false, true> |
868 | : public true_type { }; |
869 | |
870 | /// is_nothrow_destructible |
871 | template<typename _Tp> |
872 | struct is_nothrow_destructible |
873 | : public __is_nt_destructible_safe<_Tp>::type |
874 | { }; |
875 | |
876 | struct __do_is_default_constructible_impl |
877 | { |
878 | template<typename _Tp, typename = decltype(_Tp())> |
879 | static true_type __test(int); |
880 | |
881 | template<typename> |
882 | static false_type __test(...); |
883 | }; |
884 | |
885 | template<typename _Tp> |
886 | struct __is_default_constructible_impl |
887 | : public __do_is_default_constructible_impl |
888 | { |
889 | typedef decltype(__test<_Tp>(0)) type; |
890 | }; |
891 | |
892 | template<typename _Tp> |
893 | struct __is_default_constructible_atom |
894 | : public __and_<__not_<is_void<_Tp>>, |
895 | __is_default_constructible_impl<_Tp>> |
896 | { }; |
897 | |
898 | template<typename _Tp, bool = is_array<_Tp>::value> |
899 | struct __is_default_constructible_safe; |
900 | |
901 | // The following technique is a workaround for a current core language |
902 | // restriction, which does not allow for array types to occur in |
903 | // functional casts of the form T(). Complete arrays can be default- |
904 | // constructed, if the element type is default-constructible, but |
905 | // arrays with unknown bounds are not. |
906 | template<typename _Tp> |
907 | struct __is_default_constructible_safe<_Tp, true> |
908 | : public __and_<__is_array_known_bounds<_Tp>, |
909 | __is_default_constructible_atom<typename |
910 | remove_all_extents<_Tp>::type>> |
911 | { }; |
912 | |
913 | template<typename _Tp> |
914 | struct __is_default_constructible_safe<_Tp, false> |
915 | : public __is_default_constructible_atom<_Tp>::type |
916 | { }; |
917 | |
918 | /// is_default_constructible |
919 | template<typename _Tp> |
920 | struct is_default_constructible |
921 | : public __is_default_constructible_safe<_Tp>::type |
922 | { }; |
923 | |
924 | |
925 | // Implementation of is_constructible. |
926 | |
927 | // The hardest part of this trait is the binary direct-initialization |
928 | // case, because we hit into a functional cast of the form T(arg). |
929 | // This implementation uses different strategies depending on the |
930 | // target type to reduce the test overhead as much as possible: |
931 | // |
932 | // a) For a reference target type, we use a static_cast expression |
933 | // modulo its extra cases. |
934 | // |
935 | // b) For a non-reference target type we use a ::new expression. |
936 | struct __do_is_static_castable_impl |
937 | { |
938 | template<typename _From, typename _To, typename |
939 | = decltype(static_cast<_To>(declval<_From>()))> |
940 | static true_type __test(int); |
941 | |
942 | template<typename, typename> |
943 | static false_type __test(...); |
944 | }; |
945 | |
946 | template<typename _From, typename _To> |
947 | struct __is_static_castable_impl |
948 | : public __do_is_static_castable_impl |
949 | { |
950 | typedef decltype(__test<_From, _To>(0)) type; |
951 | }; |
952 | |
953 | template<typename _From, typename _To> |
954 | struct __is_static_castable_safe |
955 | : public __is_static_castable_impl<_From, _To>::type |
956 | { }; |
957 | |
958 | // __is_static_castable |
959 | template<typename _From, typename _To> |
960 | struct __is_static_castable |
961 | : public integral_constant<bool, (__is_static_castable_safe< |
962 | _From, _To>::value)> |
963 | { }; |
964 | |
965 | // Implementation for non-reference types. To meet the proper |
966 | // variable definition semantics, we also need to test for |
967 | // is_destructible in this case. |
968 | // This form should be simplified by a single expression: |
969 | // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. |
970 | struct __do_is_direct_constructible_impl |
971 | { |
972 | template<typename _Tp, typename _Arg, typename |
973 | = decltype(::new _Tp(declval<_Arg>()))> |
974 | static true_type __test(int); |
975 | |
976 | template<typename, typename> |
977 | static false_type __test(...); |
978 | }; |
979 | |
980 | template<typename _Tp, typename _Arg> |
981 | struct __is_direct_constructible_impl |
982 | : public __do_is_direct_constructible_impl |
983 | { |
984 | typedef decltype(__test<_Tp, _Arg>(0)) type; |
985 | }; |
986 | |
987 | template<typename _Tp, typename _Arg> |
988 | struct __is_direct_constructible_new_safe |
989 | : public __and_<is_destructible<_Tp>, |
990 | __is_direct_constructible_impl<_Tp, _Arg>> |
991 | { }; |
992 | |
993 | template<typename, typename> |
994 | struct is_same; |
995 | |
996 | template<typename, typename> |
997 | struct is_base_of; |
998 | |
999 | template<typename> |
1000 | struct remove_reference; |
1001 | |
1002 | template<typename _From, typename _To, bool |
1003 | = __not_<__or_<is_void<_From>, |
1004 | is_function<_From>>>::value> |
1005 | struct __is_base_to_derived_ref; |
1006 | |
1007 | template<typename _Tp, typename... _Args> |
1008 | struct is_constructible; |
1009 | |
1010 | // Detect whether we have a downcast situation during |
1011 | // reference binding. |
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; |
1019 | typedef __and_<__not_<is_same<__src_t, __dst_t>>, |
1020 | is_base_of<__src_t, __dst_t>, |
1021 | __not_<is_constructible<__dst_t, _From>>> type; |
1022 | static constexpr bool value = type::value; |
1023 | }; |
1024 | |
1025 | template<typename _From, typename _To> |
1026 | struct __is_base_to_derived_ref<_From, _To, false> |
1027 | : public false_type |
1028 | { }; |
1029 | |
1030 | template<typename _From, typename _To, bool |
1031 | = __and_<is_lvalue_reference<_From>, |
1032 | is_rvalue_reference<_To>>::value> |
1033 | struct __is_lvalue_to_rvalue_ref; |
1034 | |
1035 | // Detect whether we have an lvalue of non-function type |
1036 | // bound to a reference-compatible rvalue-reference. |
1037 | template<typename _From, typename _To> |
1038 | struct __is_lvalue_to_rvalue_ref<_From, _To, true> |
1039 | { |
1040 | typedef typename remove_cv<typename remove_reference< |
1041 | _From>::type>::type __src_t; |
1042 | typedef typename remove_cv<typename remove_reference< |
1043 | _To>::type>::type __dst_t; |
1044 | typedef __and_<__not_<is_function<__src_t>>, |
1045 | __or_<is_same<__src_t, __dst_t>, |
1046 | is_base_of<__dst_t, __src_t>>> type; |
1047 | static constexpr bool value = type::value; |
1048 | }; |
1049 | |
1050 | template<typename _From, typename _To> |
1051 | struct __is_lvalue_to_rvalue_ref<_From, _To, false> |
1052 | : public false_type |
1053 | { }; |
1054 | |
1055 | // Here we handle direct-initialization to a reference type as |
1056 | // equivalent to a static_cast modulo overshooting conversions. |
1057 | // These are restricted to the following conversions: |
1058 | // a) A base class value to a derived class reference |
1059 | // b) An lvalue to an rvalue-reference of reference-compatible |
1060 | // types that are not functions |
1061 | template<typename _Tp, typename _Arg> |
1062 | struct __is_direct_constructible_ref_cast |
1063 | : public __and_<__is_static_castable<_Arg, _Tp>, |
1064 | __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, |
1065 | __is_lvalue_to_rvalue_ref<_Arg, _Tp> |
1066 | >>> |
1067 | { }; |
1068 | |
1069 | template<typename _Tp, typename _Arg> |
1070 | struct __is_direct_constructible_new |
1071 | : public conditional<is_reference<_Tp>::value, |
1072 | __is_direct_constructible_ref_cast<_Tp, _Arg>, |
1073 | __is_direct_constructible_new_safe<_Tp, _Arg> |
1074 | >::type |
1075 | { }; |
1076 | |
1077 | template<typename _Tp, typename _Arg> |
1078 | struct __is_direct_constructible |
1079 | : public __is_direct_constructible_new<_Tp, _Arg>::type |
1080 | { }; |
1081 | |
1082 | // Since default-construction and binary direct-initialization have |
1083 | // been handled separately, the implementation of the remaining |
1084 | // n-ary construction cases is rather straightforward. We can use |
1085 | // here a functional cast, because array types are excluded anyway |
1086 | // and this form is never interpreted as a C cast. |
1087 | struct __do_is_nary_constructible_impl |
1088 | { |
1089 | template<typename _Tp, typename... _Args, typename |
1090 | = decltype(_Tp(declval<_Args>()...))> |
1091 | static true_type __test(int); |
1092 | |
1093 | template<typename, typename...> |
1094 | static false_type __test(...); |
1095 | }; |
1096 | |
1097 | template<typename _Tp, typename... _Args> |
1098 | struct __is_nary_constructible_impl |
1099 | : public __do_is_nary_constructible_impl |
1100 | { |
1101 | typedef decltype(__test<_Tp, _Args...>(0)) type; |
1102 | }; |
1103 | |
1104 | template<typename _Tp, typename... _Args> |
1105 | struct __is_nary_constructible |
1106 | : public __is_nary_constructible_impl<_Tp, _Args...>::type |
1107 | { |
1108 | static_assert(sizeof...(_Args) > 1, |
1109 | "Only useful for > 1 arguments" ); |
1110 | }; |
1111 | |
1112 | template<typename _Tp, typename... _Args> |
1113 | struct __is_constructible_impl |
1114 | : public __is_nary_constructible<_Tp, _Args...> |
1115 | { }; |
1116 | |
1117 | template<typename _Tp, typename _Arg> |
1118 | struct __is_constructible_impl<_Tp, _Arg> |
1119 | : public __is_direct_constructible<_Tp, _Arg> |
1120 | { }; |
1121 | |
1122 | template<typename _Tp> |
1123 | struct __is_constructible_impl<_Tp> |
1124 | : public is_default_constructible<_Tp> |
1125 | { }; |
1126 | |
1127 | /// is_constructible |
1128 | template<typename _Tp, typename... _Args> |
1129 | struct is_constructible |
1130 | : public __is_constructible_impl<_Tp, _Args...>::type |
1131 | { }; |
1132 | |
1133 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1134 | struct __is_copy_constructible_impl; |
1135 | |
1136 | template<typename _Tp> |
1137 | struct __is_copy_constructible_impl<_Tp, false> |
1138 | : public false_type { }; |
1139 | |
1140 | template<typename _Tp> |
1141 | struct __is_copy_constructible_impl<_Tp, true> |
1142 | : public is_constructible<_Tp, const _Tp&> |
1143 | { }; |
1144 | |
1145 | /// is_copy_constructible |
1146 | template<typename _Tp> |
1147 | struct is_copy_constructible |
1148 | : public __is_copy_constructible_impl<_Tp> |
1149 | { }; |
1150 | |
1151 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1152 | struct __is_move_constructible_impl; |
1153 | |
1154 | template<typename _Tp> |
1155 | struct __is_move_constructible_impl<_Tp, false> |
1156 | : public false_type { }; |
1157 | |
1158 | template<typename _Tp> |
1159 | struct __is_move_constructible_impl<_Tp, true> |
1160 | : public is_constructible<_Tp, _Tp&&> |
1161 | { }; |
1162 | |
1163 | /// is_move_constructible |
1164 | template<typename _Tp> |
1165 | struct is_move_constructible |
1166 | : public __is_move_constructible_impl<_Tp> |
1167 | { }; |
1168 | |
1169 | template<typename _Tp> |
1170 | struct __is_nt_default_constructible_atom |
1171 | : public integral_constant<bool, noexcept(_Tp())> |
1172 | { }; |
1173 | |
1174 | template<typename _Tp, bool = is_array<_Tp>::value> |
1175 | struct __is_nt_default_constructible_impl; |
1176 | |
1177 | template<typename _Tp> |
1178 | struct __is_nt_default_constructible_impl<_Tp, true> |
1179 | : public __and_<__is_array_known_bounds<_Tp>, |
1180 | __is_nt_default_constructible_atom<typename |
1181 | remove_all_extents<_Tp>::type>> |
1182 | { }; |
1183 | |
1184 | template<typename _Tp> |
1185 | struct __is_nt_default_constructible_impl<_Tp, false> |
1186 | : public __is_nt_default_constructible_atom<_Tp> |
1187 | { }; |
1188 | |
1189 | /// is_nothrow_default_constructible |
1190 | template<typename _Tp> |
1191 | struct is_nothrow_default_constructible |
1192 | : public __and_<is_default_constructible<_Tp>, |
1193 | __is_nt_default_constructible_impl<_Tp>> |
1194 | { }; |
1195 | |
1196 | template<typename _Tp, typename... _Args> |
1197 | struct __is_nt_constructible_impl |
1198 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> |
1199 | { }; |
1200 | |
1201 | template<typename _Tp, typename _Arg> |
1202 | struct __is_nt_constructible_impl<_Tp, _Arg> |
1203 | : public integral_constant<bool, |
1204 | noexcept(static_cast<_Tp>(declval<_Arg>()))> |
1205 | { }; |
1206 | |
1207 | template<typename _Tp> |
1208 | struct __is_nt_constructible_impl<_Tp> |
1209 | : public is_nothrow_default_constructible<_Tp> |
1210 | { }; |
1211 | |
1212 | /// is_nothrow_constructible |
1213 | template<typename _Tp, typename... _Args> |
1214 | struct is_nothrow_constructible |
1215 | : public __and_<is_constructible<_Tp, _Args...>, |
1216 | __is_nt_constructible_impl<_Tp, _Args...>> |
1217 | { }; |
1218 | |
1219 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1220 | struct __is_nothrow_copy_constructible_impl; |
1221 | |
1222 | template<typename _Tp> |
1223 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
1224 | : public false_type { }; |
1225 | |
1226 | template<typename _Tp> |
1227 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
1228 | : public is_nothrow_constructible<_Tp, const _Tp&> |
1229 | { }; |
1230 | |
1231 | /// is_nothrow_copy_constructible |
1232 | template<typename _Tp> |
1233 | struct is_nothrow_copy_constructible |
1234 | : public __is_nothrow_copy_constructible_impl<_Tp> |
1235 | { }; |
1236 | |
1237 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1238 | struct __is_nothrow_move_constructible_impl; |
1239 | |
1240 | template<typename _Tp> |
1241 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
1242 | : public false_type { }; |
1243 | |
1244 | template<typename _Tp> |
1245 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
1246 | : public is_nothrow_constructible<_Tp, _Tp&&> |
1247 | { }; |
1248 | |
1249 | /// is_nothrow_move_constructible |
1250 | template<typename _Tp> |
1251 | struct is_nothrow_move_constructible |
1252 | : public __is_nothrow_move_constructible_impl<_Tp> |
1253 | { }; |
1254 | |
1255 | template<typename _Tp, typename _Up> |
1256 | class __is_assignable_helper |
1257 | { |
1258 | template<typename _Tp1, typename _Up1, |
1259 | typename = decltype(declval<_Tp1>() = declval<_Up1>())> |
1260 | static true_type |
1261 | __test(int); |
1262 | |
1263 | template<typename, typename> |
1264 | static false_type |
1265 | __test(...); |
1266 | |
1267 | public: |
1268 | typedef decltype(__test<_Tp, _Up>(0)) type; |
1269 | }; |
1270 | |
1271 | /// is_assignable |
1272 | template<typename _Tp, typename _Up> |
1273 | struct is_assignable |
1274 | : public __is_assignable_helper<_Tp, _Up>::type |
1275 | { }; |
1276 | |
1277 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1278 | struct __is_copy_assignable_impl; |
1279 | |
1280 | template<typename _Tp> |
1281 | struct __is_copy_assignable_impl<_Tp, false> |
1282 | : public false_type { }; |
1283 | |
1284 | template<typename _Tp> |
1285 | struct __is_copy_assignable_impl<_Tp, true> |
1286 | : public is_assignable<_Tp&, const _Tp&> |
1287 | { }; |
1288 | |
1289 | /// is_copy_assignable |
1290 | template<typename _Tp> |
1291 | struct is_copy_assignable |
1292 | : public __is_copy_assignable_impl<_Tp> |
1293 | { }; |
1294 | |
1295 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1296 | struct __is_move_assignable_impl; |
1297 | |
1298 | template<typename _Tp> |
1299 | struct __is_move_assignable_impl<_Tp, false> |
1300 | : public false_type { }; |
1301 | |
1302 | template<typename _Tp> |
1303 | struct __is_move_assignable_impl<_Tp, true> |
1304 | : public is_assignable<_Tp&, _Tp&&> |
1305 | { }; |
1306 | |
1307 | /// is_move_assignable |
1308 | template<typename _Tp> |
1309 | struct is_move_assignable |
1310 | : public __is_move_assignable_impl<_Tp> |
1311 | { }; |
1312 | |
1313 | template<typename _Tp, typename _Up> |
1314 | struct __is_nt_assignable_impl |
1315 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> |
1316 | { }; |
1317 | |
1318 | /// is_nothrow_assignable |
1319 | template<typename _Tp, typename _Up> |
1320 | struct is_nothrow_assignable |
1321 | : public __and_<is_assignable<_Tp, _Up>, |
1322 | __is_nt_assignable_impl<_Tp, _Up>> |
1323 | { }; |
1324 | |
1325 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1326 | struct __is_nt_copy_assignable_impl; |
1327 | |
1328 | template<typename _Tp> |
1329 | struct __is_nt_copy_assignable_impl<_Tp, false> |
1330 | : public false_type { }; |
1331 | |
1332 | template<typename _Tp> |
1333 | struct __is_nt_copy_assignable_impl<_Tp, true> |
1334 | : public is_nothrow_assignable<_Tp&, const _Tp&> |
1335 | { }; |
1336 | |
1337 | /// is_nothrow_copy_assignable |
1338 | template<typename _Tp> |
1339 | struct is_nothrow_copy_assignable |
1340 | : public __is_nt_copy_assignable_impl<_Tp> |
1341 | { }; |
1342 | |
1343 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1344 | struct __is_nt_move_assignable_impl; |
1345 | |
1346 | template<typename _Tp> |
1347 | struct __is_nt_move_assignable_impl<_Tp, false> |
1348 | : public false_type { }; |
1349 | |
1350 | template<typename _Tp> |
1351 | struct __is_nt_move_assignable_impl<_Tp, true> |
1352 | : public is_nothrow_assignable<_Tp&, _Tp&&> |
1353 | { }; |
1354 | |
1355 | /// is_nothrow_move_assignable |
1356 | template<typename _Tp> |
1357 | struct is_nothrow_move_assignable |
1358 | : public __is_nt_move_assignable_impl<_Tp> |
1359 | { }; |
1360 | |
1361 | /// is_trivially_constructible |
1362 | template<typename _Tp, typename... _Args> |
1363 | struct is_trivially_constructible |
1364 | : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool, |
1365 | __is_trivially_constructible(_Tp, _Args...)>> |
1366 | { }; |
1367 | |
1368 | /// is_trivially_default_constructible |
1369 | template<typename _Tp> |
1370 | struct is_trivially_default_constructible |
1371 | : public is_trivially_constructible<_Tp>::type |
1372 | { }; |
1373 | |
1374 | struct __do_is_implicitly_default_constructible_impl |
1375 | { |
1376 | template <typename _Tp> |
1377 | static void __helper(const _Tp&); |
1378 | |
1379 | template <typename _Tp> |
1380 | static true_type __test(const _Tp&, |
1381 | decltype(__helper<const _Tp&>({}))* = 0); |
1382 | |
1383 | static false_type __test(...); |
1384 | }; |
1385 | |
1386 | template<typename _Tp> |
1387 | struct __is_implicitly_default_constructible_impl |
1388 | : public __do_is_implicitly_default_constructible_impl |
1389 | { |
1390 | typedef decltype(__test(declval<_Tp>())) type; |
1391 | }; |
1392 | |
1393 | template<typename _Tp> |
1394 | struct __is_implicitly_default_constructible_safe |
1395 | : public __is_implicitly_default_constructible_impl<_Tp>::type |
1396 | { }; |
1397 | |
1398 | template <typename _Tp> |
1399 | struct __is_implicitly_default_constructible |
1400 | : public __and_<is_default_constructible<_Tp>, |
1401 | __is_implicitly_default_constructible_safe<_Tp>> |
1402 | { }; |
1403 | |
1404 | /// is_trivially_copy_constructible |
1405 | template<typename _Tp> |
1406 | struct is_trivially_copy_constructible |
1407 | : public __and_<is_copy_constructible<_Tp>, |
1408 | integral_constant<bool, |
1409 | __is_trivially_constructible(_Tp, const _Tp&)>> |
1410 | { }; |
1411 | |
1412 | /// is_trivially_move_constructible |
1413 | template<typename _Tp> |
1414 | struct is_trivially_move_constructible |
1415 | : public __and_<is_move_constructible<_Tp>, |
1416 | integral_constant<bool, |
1417 | __is_trivially_constructible(_Tp, _Tp&&)>> |
1418 | { }; |
1419 | |
1420 | /// is_trivially_assignable |
1421 | template<typename _Tp, typename _Up> |
1422 | struct is_trivially_assignable |
1423 | : public __and_<is_assignable<_Tp, _Up>, |
1424 | integral_constant<bool, |
1425 | __is_trivially_assignable(_Tp, _Up)>> |
1426 | { }; |
1427 | |
1428 | /// is_trivially_copy_assignable |
1429 | template<typename _Tp> |
1430 | struct is_trivially_copy_assignable |
1431 | : public __and_<is_copy_assignable<_Tp>, |
1432 | integral_constant<bool, |
1433 | __is_trivially_assignable(_Tp&, const _Tp&)>> |
1434 | { }; |
1435 | |
1436 | /// is_trivially_move_assignable |
1437 | template<typename _Tp> |
1438 | struct is_trivially_move_assignable |
1439 | : public __and_<is_move_assignable<_Tp>, |
1440 | integral_constant<bool, |
1441 | __is_trivially_assignable(_Tp&, _Tp&&)>> |
1442 | { }; |
1443 | |
1444 | /// is_trivially_destructible |
1445 | template<typename _Tp> |
1446 | struct is_trivially_destructible |
1447 | : public __and_<is_destructible<_Tp>, integral_constant<bool, |
1448 | __has_trivial_destructor(_Tp)>> |
1449 | { }; |
1450 | |
1451 | |
1452 | /// has_virtual_destructor |
1453 | template<typename _Tp> |
1454 | struct has_virtual_destructor |
1455 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> |
1456 | { }; |
1457 | |
1458 | |
1459 | // type property queries. |
1460 | |
1461 | /// alignment_of |
1462 | template<typename _Tp> |
1463 | struct alignment_of |
1464 | : public integral_constant<std::size_t, __alignof__(_Tp)> { }; |
1465 | |
1466 | /// rank |
1467 | template<typename> |
1468 | struct rank |
1469 | : public integral_constant<std::size_t, 0> { }; |
1470 | |
1471 | template<typename _Tp, std::size_t _Size> |
1472 | struct rank<_Tp[_Size]> |
1473 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; |
1474 | |
1475 | template<typename _Tp> |
1476 | struct rank<_Tp[]> |
1477 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; |
1478 | |
1479 | /// extent |
1480 | template<typename, unsigned _Uint> |
1481 | struct extent |
1482 | : public integral_constant<std::size_t, 0> { }; |
1483 | |
1484 | template<typename _Tp, unsigned _Uint, std::size_t _Size> |
1485 | struct extent<_Tp[_Size], _Uint> |
1486 | : public integral_constant<std::size_t, |
1487 | _Uint == 0 ? _Size : extent<_Tp, |
1488 | _Uint - 1>::value> |
1489 | { }; |
1490 | |
1491 | template<typename _Tp, unsigned _Uint> |
1492 | struct extent<_Tp[], _Uint> |
1493 | : public integral_constant<std::size_t, |
1494 | _Uint == 0 ? 0 : extent<_Tp, |
1495 | _Uint - 1>::value> |
1496 | { }; |
1497 | |
1498 | |
1499 | // Type relations. |
1500 | |
1501 | /// is_same |
1502 | template<typename, typename> |
1503 | struct is_same |
1504 | : public false_type { }; |
1505 | |
1506 | template<typename _Tp> |
1507 | struct is_same<_Tp, _Tp> |
1508 | : public true_type { }; |
1509 | |
1510 | /// is_base_of |
1511 | template<typename _Base, typename _Derived> |
1512 | struct is_base_of |
1513 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> |
1514 | { }; |
1515 | |
1516 | template<typename _From, typename _To, |
1517 | bool = __or_<is_void<_From>, is_function<_To>, |
1518 | is_array<_To>>::value> |
1519 | struct __is_convertible_helper |
1520 | { typedef typename is_void<_To>::type type; }; |
1521 | |
1522 | template<typename _From, typename _To> |
1523 | class __is_convertible_helper<_From, _To, false> |
1524 | { |
1525 | template<typename _To1> |
1526 | static void __test_aux(_To1); |
1527 | |
1528 | template<typename _From1, typename _To1, |
1529 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> |
1530 | static true_type |
1531 | __test(int); |
1532 | |
1533 | template<typename, typename> |
1534 | static false_type |
1535 | __test(...); |
1536 | |
1537 | public: |
1538 | typedef decltype(__test<_From, _To>(0)) type; |
1539 | }; |
1540 | |
1541 | |
1542 | /// is_convertible |
1543 | template<typename _From, typename _To> |
1544 | struct is_convertible |
1545 | : public __is_convertible_helper<_From, _To>::type |
1546 | { }; |
1547 | |
1548 | |
1549 | // Const-volatile modifications. |
1550 | |
1551 | /// remove_const |
1552 | template<typename _Tp> |
1553 | struct remove_const |
1554 | { typedef _Tp type; }; |
1555 | |
1556 | template<typename _Tp> |
1557 | struct remove_const<_Tp const> |
1558 | { typedef _Tp type; }; |
1559 | |
1560 | /// remove_volatile |
1561 | template<typename _Tp> |
1562 | struct remove_volatile |
1563 | { typedef _Tp type; }; |
1564 | |
1565 | template<typename _Tp> |
1566 | struct remove_volatile<_Tp volatile> |
1567 | { typedef _Tp type; }; |
1568 | |
1569 | /// remove_cv |
1570 | template<typename _Tp> |
1571 | struct remove_cv |
1572 | { |
1573 | typedef typename |
1574 | remove_const<typename remove_volatile<_Tp>::type>::type type; |
1575 | }; |
1576 | |
1577 | /// add_const |
1578 | template<typename _Tp> |
1579 | struct add_const |
1580 | { typedef _Tp const type; }; |
1581 | |
1582 | /// add_volatile |
1583 | template<typename _Tp> |
1584 | struct add_volatile |
1585 | { typedef _Tp volatile type; }; |
1586 | |
1587 | /// add_cv |
1588 | template<typename _Tp> |
1589 | struct add_cv |
1590 | { |
1591 | typedef typename |
1592 | add_const<typename add_volatile<_Tp>::type>::type type; |
1593 | }; |
1594 | |
1595 | #if __cplusplus > 201103L |
1596 | |
1597 | #define __cpp_lib_transformation_trait_aliases 201304 |
1598 | |
1599 | /// Alias template for remove_const |
1600 | template<typename _Tp> |
1601 | using remove_const_t = typename remove_const<_Tp>::type; |
1602 | |
1603 | /// Alias template for remove_volatile |
1604 | template<typename _Tp> |
1605 | using remove_volatile_t = typename remove_volatile<_Tp>::type; |
1606 | |
1607 | /// Alias template for remove_cv |
1608 | template<typename _Tp> |
1609 | using remove_cv_t = typename remove_cv<_Tp>::type; |
1610 | |
1611 | /// Alias template for add_const |
1612 | template<typename _Tp> |
1613 | using add_const_t = typename add_const<_Tp>::type; |
1614 | |
1615 | /// Alias template for add_volatile |
1616 | template<typename _Tp> |
1617 | using add_volatile_t = typename add_volatile<_Tp>::type; |
1618 | |
1619 | /// Alias template for add_cv |
1620 | template<typename _Tp> |
1621 | using add_cv_t = typename add_cv<_Tp>::type; |
1622 | #endif |
1623 | |
1624 | // Reference transformations. |
1625 | |
1626 | /// remove_reference |
1627 | template<typename _Tp> |
1628 | struct remove_reference |
1629 | { typedef _Tp type; }; |
1630 | |
1631 | template<typename _Tp> |
1632 | struct remove_reference<_Tp&> |
1633 | { typedef _Tp type; }; |
1634 | |
1635 | template<typename _Tp> |
1636 | struct remove_reference<_Tp&&> |
1637 | { typedef _Tp type; }; |
1638 | |
1639 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1640 | struct __add_lvalue_reference_helper |
1641 | { typedef _Tp type; }; |
1642 | |
1643 | template<typename _Tp> |
1644 | struct __add_lvalue_reference_helper<_Tp, true> |
1645 | { typedef _Tp& type; }; |
1646 | |
1647 | /// add_lvalue_reference |
1648 | template<typename _Tp> |
1649 | struct add_lvalue_reference |
1650 | : public __add_lvalue_reference_helper<_Tp> |
1651 | { }; |
1652 | |
1653 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
1654 | struct __add_rvalue_reference_helper |
1655 | { typedef _Tp type; }; |
1656 | |
1657 | template<typename _Tp> |
1658 | struct __add_rvalue_reference_helper<_Tp, true> |
1659 | { typedef _Tp&& type; }; |
1660 | |
1661 | /// add_rvalue_reference |
1662 | template<typename _Tp> |
1663 | struct add_rvalue_reference |
1664 | : public __add_rvalue_reference_helper<_Tp> |
1665 | { }; |
1666 | |
1667 | #if __cplusplus > 201103L |
1668 | /// Alias template for remove_reference |
1669 | template<typename _Tp> |
1670 | using remove_reference_t = typename remove_reference<_Tp>::type; |
1671 | |
1672 | /// Alias template for add_lvalue_reference |
1673 | template<typename _Tp> |
1674 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; |
1675 | |
1676 | /// Alias template for add_rvalue_reference |
1677 | template<typename _Tp> |
1678 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; |
1679 | #endif |
1680 | |
1681 | // Sign modifications. |
1682 | |
1683 | // Utility for constructing identically cv-qualified types. |
1684 | template<typename _Unqualified, bool _IsConst, bool _IsVol> |
1685 | struct __cv_selector; |
1686 | |
1687 | template<typename _Unqualified> |
1688 | struct __cv_selector<_Unqualified, false, false> |
1689 | { typedef _Unqualified __type; }; |
1690 | |
1691 | template<typename _Unqualified> |
1692 | struct __cv_selector<_Unqualified, false, true> |
1693 | { typedef volatile _Unqualified __type; }; |
1694 | |
1695 | template<typename _Unqualified> |
1696 | struct __cv_selector<_Unqualified, true, false> |
1697 | { typedef const _Unqualified __type; }; |
1698 | |
1699 | template<typename _Unqualified> |
1700 | struct __cv_selector<_Unqualified, true, true> |
1701 | { typedef const volatile _Unqualified __type; }; |
1702 | |
1703 | template<typename _Qualified, typename _Unqualified, |
1704 | bool _IsConst = is_const<_Qualified>::value, |
1705 | bool _IsVol = is_volatile<_Qualified>::value> |
1706 | class __match_cv_qualifiers |
1707 | { |
1708 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1709 | |
1710 | public: |
1711 | typedef typename __match::__type __type; |
1712 | }; |
1713 | |
1714 | // Utility for finding the unsigned versions of signed integral types. |
1715 | template<typename _Tp> |
1716 | struct __make_unsigned |
1717 | { typedef _Tp __type; }; |
1718 | |
1719 | template<> |
1720 | struct __make_unsigned<char> |
1721 | { typedef unsigned char __type; }; |
1722 | |
1723 | template<> |
1724 | struct __make_unsigned<signed char> |
1725 | { typedef unsigned char __type; }; |
1726 | |
1727 | template<> |
1728 | struct __make_unsigned<short> |
1729 | { typedef unsigned short __type; }; |
1730 | |
1731 | template<> |
1732 | struct __make_unsigned<int> |
1733 | { typedef unsigned int __type; }; |
1734 | |
1735 | template<> |
1736 | struct __make_unsigned<long> |
1737 | { typedef unsigned long __type; }; |
1738 | |
1739 | template<> |
1740 | struct __make_unsigned<long long> |
1741 | { typedef unsigned long long __type; }; |
1742 | |
1743 | #if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__) |
1744 | template<> |
1745 | struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__> |
1746 | { }; |
1747 | #endif |
1748 | |
1749 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1750 | template<> |
1751 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> |
1752 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; |
1753 | #endif |
1754 | #if defined(__GLIBCXX_TYPE_INT_N_1) |
1755 | template<> |
1756 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> |
1757 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; |
1758 | #endif |
1759 | #if defined(__GLIBCXX_TYPE_INT_N_2) |
1760 | template<> |
1761 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1762 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; |
1763 | #endif |
1764 | #if defined(__GLIBCXX_TYPE_INT_N_3) |
1765 | template<> |
1766 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> |
1767 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; |
1768 | #endif |
1769 | |
1770 | // Select between integral and enum: not possible to be both. |
1771 | template<typename _Tp, |
1772 | bool _IsInt = is_integral<_Tp>::value, |
1773 | bool _IsEnum = is_enum<_Tp>::value> |
1774 | class __make_unsigned_selector; |
1775 | |
1776 | template<typename _Tp> |
1777 | class __make_unsigned_selector<_Tp, true, false> |
1778 | { |
1779 | typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; |
1780 | typedef typename __unsignedt::__type __unsigned_type; |
1781 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; |
1782 | |
1783 | public: |
1784 | typedef typename __cv_unsigned::__type __type; |
1785 | }; |
1786 | |
1787 | template<typename _Tp> |
1788 | class __make_unsigned_selector<_Tp, false, true> |
1789 | { |
1790 | // With -fshort-enums, an enum may be as small as a char. |
1791 | typedef unsigned char __smallest; |
1792 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); |
1793 | static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); |
1794 | static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); |
1795 | static const bool __b3 = sizeof(_Tp) <= sizeof(unsigned long); |
1796 | typedef conditional<__b3, unsigned long, unsigned long long> __cond3; |
1797 | typedef typename __cond3::type __cond3_type; |
1798 | typedef conditional<__b2, unsigned int, __cond3_type> __cond2; |
1799 | typedef typename __cond2::type __cond2_type; |
1800 | typedef conditional<__b1, unsigned short, __cond2_type> __cond1; |
1801 | typedef typename __cond1::type __cond1_type; |
1802 | |
1803 | typedef typename conditional<__b0, __smallest, __cond1_type>::type |
1804 | __unsigned_type; |
1805 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; |
1806 | |
1807 | public: |
1808 | typedef typename __cv_unsigned::__type __type; |
1809 | }; |
1810 | |
1811 | // Given an integral/enum type, return the corresponding unsigned |
1812 | // integer type. |
1813 | // Primary template. |
1814 | /// make_unsigned |
1815 | template<typename _Tp> |
1816 | struct make_unsigned |
1817 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
1818 | |
1819 | // Integral, but don't define. |
1820 | template<> |
1821 | struct make_unsigned<bool>; |
1822 | |
1823 | |
1824 | // Utility for finding the signed versions of unsigned integral types. |
1825 | template<typename _Tp> |
1826 | struct __make_signed |
1827 | { typedef _Tp __type; }; |
1828 | |
1829 | template<> |
1830 | struct __make_signed<char> |
1831 | { typedef signed char __type; }; |
1832 | |
1833 | template<> |
1834 | struct __make_signed<unsigned char> |
1835 | { typedef signed char __type; }; |
1836 | |
1837 | template<> |
1838 | struct __make_signed<unsigned short> |
1839 | { typedef signed short __type; }; |
1840 | |
1841 | template<> |
1842 | struct __make_signed<unsigned int> |
1843 | { typedef signed int __type; }; |
1844 | |
1845 | template<> |
1846 | struct __make_signed<unsigned long> |
1847 | { typedef signed long __type; }; |
1848 | |
1849 | template<> |
1850 | struct __make_signed<unsigned long long> |
1851 | { typedef signed long long __type; }; |
1852 | |
1853 | #if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__) |
1854 | template<> |
1855 | struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__> |
1856 | { }; |
1857 | #endif |
1858 | |
1859 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
1860 | template<> |
1861 | struct __make_signed<char16_t> : __make_signed<uint_least16_t> |
1862 | { }; |
1863 | template<> |
1864 | struct __make_signed<char32_t> : __make_signed<uint_least32_t> |
1865 | { }; |
1866 | #endif |
1867 | |
1868 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1869 | template<> |
1870 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> |
1871 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; |
1872 | #endif |
1873 | #if defined(__GLIBCXX_TYPE_INT_N_1) |
1874 | template<> |
1875 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> |
1876 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; |
1877 | #endif |
1878 | #if defined(__GLIBCXX_TYPE_INT_N_2) |
1879 | template<> |
1880 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> |
1881 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; |
1882 | #endif |
1883 | #if defined(__GLIBCXX_TYPE_INT_N_3) |
1884 | template<> |
1885 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1886 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; |
1887 | #endif |
1888 | |
1889 | // Select between integral and enum: not possible to be both. |
1890 | template<typename _Tp, |
1891 | bool _IsInt = is_integral<_Tp>::value, |
1892 | bool _IsEnum = is_enum<_Tp>::value> |
1893 | class __make_signed_selector; |
1894 | |
1895 | template<typename _Tp> |
1896 | class __make_signed_selector<_Tp, true, false> |
1897 | { |
1898 | typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; |
1899 | typedef typename __signedt::__type __signed_type; |
1900 | typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; |
1901 | |
1902 | public: |
1903 | typedef typename __cv_signed::__type __type; |
1904 | }; |
1905 | |
1906 | template<typename _Tp> |
1907 | class __make_signed_selector<_Tp, false, true> |
1908 | { |
1909 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
1910 | |
1911 | public: |
1912 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
1913 | }; |
1914 | |
1915 | // Given an integral/enum type, return the corresponding signed |
1916 | // integer type. |
1917 | // Primary template. |
1918 | /// make_signed |
1919 | template<typename _Tp> |
1920 | struct make_signed |
1921 | { typedef typename __make_signed_selector<_Tp>::__type type; }; |
1922 | |
1923 | // Integral, but don't define. |
1924 | template<> |
1925 | struct make_signed<bool>; |
1926 | |
1927 | #if __cplusplus > 201103L |
1928 | /// Alias template for make_signed |
1929 | template<typename _Tp> |
1930 | using make_signed_t = typename make_signed<_Tp>::type; |
1931 | |
1932 | /// Alias template for make_unsigned |
1933 | template<typename _Tp> |
1934 | using make_unsigned_t = typename make_unsigned<_Tp>::type; |
1935 | #endif |
1936 | |
1937 | // Array modifications. |
1938 | |
1939 | /// remove_extent |
1940 | template<typename _Tp> |
1941 | struct remove_extent |
1942 | { typedef _Tp type; }; |
1943 | |
1944 | template<typename _Tp, std::size_t _Size> |
1945 | struct remove_extent<_Tp[_Size]> |
1946 | { typedef _Tp type; }; |
1947 | |
1948 | template<typename _Tp> |
1949 | struct remove_extent<_Tp[]> |
1950 | { typedef _Tp type; }; |
1951 | |
1952 | /// remove_all_extents |
1953 | template<typename _Tp> |
1954 | struct remove_all_extents |
1955 | { typedef _Tp type; }; |
1956 | |
1957 | template<typename _Tp, std::size_t _Size> |
1958 | struct remove_all_extents<_Tp[_Size]> |
1959 | { typedef typename remove_all_extents<_Tp>::type type; }; |
1960 | |
1961 | template<typename _Tp> |
1962 | struct remove_all_extents<_Tp[]> |
1963 | { typedef typename remove_all_extents<_Tp>::type type; }; |
1964 | |
1965 | #if __cplusplus > 201103L |
1966 | /// Alias template for remove_extent |
1967 | template<typename _Tp> |
1968 | using remove_extent_t = typename remove_extent<_Tp>::type; |
1969 | |
1970 | /// Alias template for remove_all_extents |
1971 | template<typename _Tp> |
1972 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; |
1973 | #endif |
1974 | |
1975 | // Pointer modifications. |
1976 | |
1977 | template<typename _Tp, typename> |
1978 | struct __remove_pointer_helper |
1979 | { typedef _Tp type; }; |
1980 | |
1981 | template<typename _Tp, typename _Up> |
1982 | struct __remove_pointer_helper<_Tp, _Up*> |
1983 | { typedef _Up type; }; |
1984 | |
1985 | /// remove_pointer |
1986 | template<typename _Tp> |
1987 | struct remove_pointer |
1988 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> |
1989 | { }; |
1990 | |
1991 | /// add_pointer |
1992 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1993 | is_void<_Tp>>::value> |
1994 | struct __add_pointer_helper |
1995 | { typedef _Tp type; }; |
1996 | |
1997 | template<typename _Tp> |
1998 | struct __add_pointer_helper<_Tp, true> |
1999 | { typedef typename remove_reference<_Tp>::type* type; }; |
2000 | |
2001 | template<typename _Tp> |
2002 | struct add_pointer |
2003 | : public __add_pointer_helper<_Tp> |
2004 | { }; |
2005 | |
2006 | #if __cplusplus > 201103L |
2007 | /// Alias template for remove_pointer |
2008 | template<typename _Tp> |
2009 | using remove_pointer_t = typename remove_pointer<_Tp>::type; |
2010 | |
2011 | /// Alias template for add_pointer |
2012 | template<typename _Tp> |
2013 | using add_pointer_t = typename add_pointer<_Tp>::type; |
2014 | #endif |
2015 | |
2016 | template<std::size_t _Len> |
2017 | struct __aligned_storage_msa |
2018 | { |
2019 | union __type |
2020 | { |
2021 | unsigned char __data[_Len]; |
2022 | struct __attribute__((__aligned__)) { } __align; |
2023 | }; |
2024 | }; |
2025 | |
2026 | /** |
2027 | * @brief Alignment type. |
2028 | * |
2029 | * The value of _Align is a default-alignment which shall be the |
2030 | * most stringent alignment requirement for any C++ object type |
2031 | * whose size is no greater than _Len (3.9). The member typedef |
2032 | * type shall be a POD type suitable for use as uninitialized |
2033 | * storage for any object whose size is at most _Len and whose |
2034 | * alignment is a divisor of _Align. |
2035 | */ |
2036 | template<std::size_t _Len, std::size_t _Align = |
2037 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> |
2038 | struct aligned_storage |
2039 | { |
2040 | union type |
2041 | { |
2042 | unsigned char __data[_Len]; |
2043 | struct __attribute__((__aligned__((_Align)))) { } __align; |
2044 | }; |
2045 | }; |
2046 | |
2047 | template <typename... _Types> |
2048 | struct __strictest_alignment |
2049 | { |
2050 | static const size_t _S_alignment = 0; |
2051 | static const size_t _S_size = 0; |
2052 | }; |
2053 | |
2054 | template <typename _Tp, typename... _Types> |
2055 | struct __strictest_alignment<_Tp, _Types...> |
2056 | { |
2057 | static const size_t _S_alignment = |
2058 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment |
2059 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; |
2060 | static const size_t _S_size = |
2061 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size |
2062 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; |
2063 | }; |
2064 | |
2065 | /** |
2066 | * @brief Provide aligned storage for types. |
2067 | * |
2068 | * [meta.trans.other] |
2069 | * |
2070 | * Provides aligned storage for any of the provided types of at |
2071 | * least size _Len. |
2072 | * |
2073 | * @see aligned_storage |
2074 | */ |
2075 | template <size_t _Len, typename... _Types> |
2076 | struct aligned_union |
2077 | { |
2078 | private: |
2079 | static_assert(sizeof...(_Types) != 0, "At least one type is required" ); |
2080 | |
2081 | using __strictest = __strictest_alignment<_Types...>; |
2082 | static const size_t _S_len = _Len > __strictest::_S_size |
2083 | ? _Len : __strictest::_S_size; |
2084 | public: |
2085 | /// The value of the strictest alignment of _Types. |
2086 | static const size_t alignment_value = __strictest::_S_alignment; |
2087 | /// The storage. |
2088 | typedef typename aligned_storage<_S_len, alignment_value>::type type; |
2089 | }; |
2090 | |
2091 | template <size_t _Len, typename... _Types> |
2092 | const size_t aligned_union<_Len, _Types...>::alignment_value; |
2093 | |
2094 | // Decay trait for arrays and functions, used for perfect forwarding |
2095 | // in make_pair, make_tuple, etc. |
2096 | template<typename _Up, |
2097 | bool _IsArray = is_array<_Up>::value, |
2098 | bool _IsFunction = is_function<_Up>::value> |
2099 | struct __decay_selector; |
2100 | |
2101 | // NB: DR 705. |
2102 | template<typename _Up> |
2103 | struct __decay_selector<_Up, false, false> |
2104 | { typedef typename remove_cv<_Up>::type __type; }; |
2105 | |
2106 | template<typename _Up> |
2107 | struct __decay_selector<_Up, true, false> |
2108 | { typedef typename remove_extent<_Up>::type* __type; }; |
2109 | |
2110 | template<typename _Up> |
2111 | struct __decay_selector<_Up, false, true> |
2112 | { typedef typename add_pointer<_Up>::type __type; }; |
2113 | |
2114 | /// decay |
2115 | template<typename _Tp> |
2116 | class decay |
2117 | { |
2118 | typedef typename remove_reference<_Tp>::type __remove_type; |
2119 | |
2120 | public: |
2121 | typedef typename __decay_selector<__remove_type>::__type type; |
2122 | }; |
2123 | |
2124 | template<typename _Tp> |
2125 | class reference_wrapper; |
2126 | |
2127 | // Helper which adds a reference to a type when given a reference_wrapper |
2128 | template<typename _Tp> |
2129 | struct __strip_reference_wrapper |
2130 | { |
2131 | typedef _Tp __type; |
2132 | }; |
2133 | |
2134 | template<typename _Tp> |
2135 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > |
2136 | { |
2137 | typedef _Tp& __type; |
2138 | }; |
2139 | |
2140 | template<typename _Tp> |
2141 | struct __decay_and_strip |
2142 | { |
2143 | typedef typename __strip_reference_wrapper< |
2144 | typename decay<_Tp>::type>::__type __type; |
2145 | }; |
2146 | |
2147 | |
2148 | // Primary template. |
2149 | /// Define a member typedef @c type only if a boolean constant is true. |
2150 | template<bool, typename _Tp = void> |
2151 | struct enable_if |
2152 | { }; |
2153 | |
2154 | // Partial specialization for true. |
2155 | template<typename _Tp> |
2156 | struct enable_if<true, _Tp> |
2157 | { typedef _Tp type; }; |
2158 | |
2159 | template<typename... _Cond> |
2160 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; |
2161 | |
2162 | // Primary template. |
2163 | /// Define a member typedef @c type to one of two argument types. |
2164 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2165 | struct conditional |
2166 | { typedef _Iftrue type; }; |
2167 | |
2168 | // Partial specialization for false. |
2169 | template<typename _Iftrue, typename _Iffalse> |
2170 | struct conditional<false, _Iftrue, _Iffalse> |
2171 | { typedef _Iffalse type; }; |
2172 | |
2173 | /// common_type |
2174 | template<typename... _Tp> |
2175 | struct common_type; |
2176 | |
2177 | // Sfinae-friendly common_type implementation: |
2178 | |
2179 | struct __do_common_type_impl |
2180 | { |
2181 | template<typename _Tp, typename _Up> |
2182 | static __success_type<typename decay<decltype |
2183 | (true ? std::declval<_Tp>() |
2184 | : std::declval<_Up>())>::type> _S_test(int); |
2185 | |
2186 | template<typename, typename> |
2187 | static __failure_type _S_test(...); |
2188 | }; |
2189 | |
2190 | template<typename _Tp, typename _Up> |
2191 | struct __common_type_impl |
2192 | : private __do_common_type_impl |
2193 | { |
2194 | typedef decltype(_S_test<_Tp, _Up>(0)) type; |
2195 | }; |
2196 | |
2197 | struct __do_member_type_wrapper |
2198 | { |
2199 | template<typename _Tp> |
2200 | static __success_type<typename _Tp::type> _S_test(int); |
2201 | |
2202 | template<typename> |
2203 | static __failure_type _S_test(...); |
2204 | }; |
2205 | |
2206 | template<typename _Tp> |
2207 | struct __member_type_wrapper |
2208 | : private __do_member_type_wrapper |
2209 | { |
2210 | typedef decltype(_S_test<_Tp>(0)) type; |
2211 | }; |
2212 | |
2213 | template<typename _CTp, typename... _Args> |
2214 | struct __expanded_common_type_wrapper |
2215 | { |
2216 | typedef common_type<typename _CTp::type, _Args...> type; |
2217 | }; |
2218 | |
2219 | template<typename... _Args> |
2220 | struct __expanded_common_type_wrapper<__failure_type, _Args...> |
2221 | { typedef __failure_type type; }; |
2222 | |
2223 | template<typename _Tp> |
2224 | struct common_type<_Tp> |
2225 | { typedef typename decay<_Tp>::type type; }; |
2226 | |
2227 | template<typename _Tp, typename _Up> |
2228 | struct common_type<_Tp, _Up> |
2229 | : public __common_type_impl<_Tp, _Up>::type |
2230 | { }; |
2231 | |
2232 | template<typename _Tp, typename _Up, typename... _Vp> |
2233 | struct common_type<_Tp, _Up, _Vp...> |
2234 | : public __expanded_common_type_wrapper<typename __member_type_wrapper< |
2235 | common_type<_Tp, _Up>>::type, _Vp...>::type |
2236 | { }; |
2237 | |
2238 | /// The underlying type of an enum. |
2239 | template<typename _Tp> |
2240 | struct underlying_type |
2241 | { |
2242 | typedef __underlying_type(_Tp) type; |
2243 | }; |
2244 | |
2245 | template<typename _Tp> |
2246 | struct __declval_protector |
2247 | { |
2248 | static const bool __stop = false; |
2249 | static typename add_rvalue_reference<_Tp>::type __delegate(); |
2250 | }; |
2251 | |
2252 | template<typename _Tp> |
2253 | inline typename add_rvalue_reference<_Tp>::type |
2254 | declval() noexcept |
2255 | { |
2256 | static_assert(__declval_protector<_Tp>::__stop, |
2257 | "declval() must not be used!" ); |
2258 | return __declval_protector<_Tp>::__delegate(); |
2259 | } |
2260 | |
2261 | /// result_of |
2262 | template<typename _Signature> |
2263 | class result_of; |
2264 | |
2265 | // Sfinae-friendly result_of implementation: |
2266 | |
2267 | #define __cpp_lib_result_of_sfinae 201210 |
2268 | |
2269 | struct __invoke_memfun_ref { }; |
2270 | struct __invoke_memfun_deref { }; |
2271 | struct __invoke_memobj_ref { }; |
2272 | struct __invoke_memobj_deref { }; |
2273 | struct __invoke_other { }; |
2274 | |
2275 | // Associate a tag type with a specialization of __success_type. |
2276 | template<typename _Tp, typename _Tag> |
2277 | struct __result_of_success : __success_type<_Tp> |
2278 | { using __invoke_type = _Tag; }; |
2279 | |
2280 | // [func.require] paragraph 1 bullet 1: |
2281 | struct __result_of_memfun_ref_impl |
2282 | { |
2283 | template<typename _Fp, typename _Tp1, typename... _Args> |
2284 | static __result_of_success<decltype( |
2285 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
2286 | ), __invoke_memfun_ref> _S_test(int); |
2287 | |
2288 | template<typename...> |
2289 | static __failure_type _S_test(...); |
2290 | }; |
2291 | |
2292 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2293 | struct __result_of_memfun_ref |
2294 | : private __result_of_memfun_ref_impl |
2295 | { |
2296 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; |
2297 | }; |
2298 | |
2299 | // [func.require] paragraph 1 bullet 2: |
2300 | struct __result_of_memfun_deref_impl |
2301 | { |
2302 | template<typename _Fp, typename _Tp1, typename... _Args> |
2303 | static __result_of_success<decltype( |
2304 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
2305 | ), __invoke_memfun_deref> _S_test(int); |
2306 | |
2307 | template<typename...> |
2308 | static __failure_type _S_test(...); |
2309 | }; |
2310 | |
2311 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2312 | struct __result_of_memfun_deref |
2313 | : private __result_of_memfun_deref_impl |
2314 | { |
2315 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; |
2316 | }; |
2317 | |
2318 | // [func.require] paragraph 1 bullet 3: |
2319 | struct __result_of_memobj_ref_impl |
2320 | { |
2321 | template<typename _Fp, typename _Tp1> |
2322 | static __result_of_success<decltype( |
2323 | std::declval<_Tp1>().*std::declval<_Fp>() |
2324 | ), __invoke_memobj_ref> _S_test(int); |
2325 | |
2326 | template<typename, typename> |
2327 | static __failure_type _S_test(...); |
2328 | }; |
2329 | |
2330 | template<typename _MemPtr, typename _Arg> |
2331 | struct __result_of_memobj_ref |
2332 | : private __result_of_memobj_ref_impl |
2333 | { |
2334 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; |
2335 | }; |
2336 | |
2337 | // [func.require] paragraph 1 bullet 4: |
2338 | struct __result_of_memobj_deref_impl |
2339 | { |
2340 | template<typename _Fp, typename _Tp1> |
2341 | static __result_of_success<decltype( |
2342 | (*std::declval<_Tp1>()).*std::declval<_Fp>() |
2343 | ), __invoke_memobj_deref> _S_test(int); |
2344 | |
2345 | template<typename, typename> |
2346 | static __failure_type _S_test(...); |
2347 | }; |
2348 | |
2349 | template<typename _MemPtr, typename _Arg> |
2350 | struct __result_of_memobj_deref |
2351 | : private __result_of_memobj_deref_impl |
2352 | { |
2353 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; |
2354 | }; |
2355 | |
2356 | template<typename _MemPtr, typename _Arg> |
2357 | struct __result_of_memobj; |
2358 | |
2359 | template<typename _Res, typename _Class, typename _Arg> |
2360 | struct __result_of_memobj<_Res _Class::*, _Arg> |
2361 | { |
2362 | typedef typename remove_cv<typename remove_reference< |
2363 | _Arg>::type>::type _Argval; |
2364 | typedef _Res _Class::* _MemPtr; |
2365 | typedef typename conditional<__or_<is_same<_Argval, _Class>, |
2366 | is_base_of<_Class, _Argval>>::value, |
2367 | __result_of_memobj_ref<_MemPtr, _Arg>, |
2368 | __result_of_memobj_deref<_MemPtr, _Arg> |
2369 | >::type::type type; |
2370 | }; |
2371 | |
2372 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2373 | struct __result_of_memfun; |
2374 | |
2375 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> |
2376 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
2377 | { |
2378 | typedef typename remove_cv<typename remove_reference< |
2379 | _Arg>::type>::type _Argval; |
2380 | typedef _Res _Class::* _MemPtr; |
2381 | typedef typename conditional<__or_<is_same<_Argval, _Class>, |
2382 | is_base_of<_Class, _Argval>>::value, |
2383 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, |
2384 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> |
2385 | >::type::type type; |
2386 | }; |
2387 | |
2388 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2389 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper |
2390 | // as the object expression |
2391 | |
2392 | // Used by result_of, invoke etc. to unwrap a reference_wrapper. |
2393 | template<typename _Tp, typename _Up = typename decay<_Tp>::type> |
2394 | struct __inv_unwrap |
2395 | { |
2396 | using type = _Tp; |
2397 | }; |
2398 | |
2399 | template<typename _Tp, typename _Up> |
2400 | struct __inv_unwrap<_Tp, reference_wrapper<_Up>> |
2401 | { |
2402 | using type = _Up&; |
2403 | }; |
2404 | |
2405 | template<bool, bool, typename _Functor, typename... _ArgTypes> |
2406 | struct __result_of_impl |
2407 | { |
2408 | typedef __failure_type type; |
2409 | }; |
2410 | |
2411 | template<typename _MemPtr, typename _Arg> |
2412 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
2413 | : public __result_of_memobj<typename decay<_MemPtr>::type, |
2414 | typename __inv_unwrap<_Arg>::type> |
2415 | { }; |
2416 | |
2417 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2418 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> |
2419 | : public __result_of_memfun<typename decay<_MemPtr>::type, |
2420 | typename __inv_unwrap<_Arg>::type, _Args...> |
2421 | { }; |
2422 | |
2423 | // [func.require] paragraph 1 bullet 5: |
2424 | struct __result_of_other_impl |
2425 | { |
2426 | template<typename _Fn, typename... _Args> |
2427 | static __result_of_success<decltype( |
2428 | std::declval<_Fn>()(std::declval<_Args>()...) |
2429 | ), __invoke_other> _S_test(int); |
2430 | |
2431 | template<typename...> |
2432 | static __failure_type _S_test(...); |
2433 | }; |
2434 | |
2435 | template<typename _Functor, typename... _ArgTypes> |
2436 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2437 | : private __result_of_other_impl |
2438 | { |
2439 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
2440 | }; |
2441 | |
2442 | // __invoke_result (std::invoke_result for C++11) |
2443 | template<typename _Functor, typename... _ArgTypes> |
2444 | struct __invoke_result |
2445 | : public __result_of_impl< |
2446 | is_member_object_pointer< |
2447 | typename remove_reference<_Functor>::type |
2448 | >::value, |
2449 | is_member_function_pointer< |
2450 | typename remove_reference<_Functor>::type |
2451 | >::value, |
2452 | _Functor, _ArgTypes... |
2453 | >::type |
2454 | { }; |
2455 | |
2456 | template<typename _Functor, typename... _ArgTypes> |
2457 | struct result_of<_Functor(_ArgTypes...)> |
2458 | : public __invoke_result<_Functor, _ArgTypes...> |
2459 | { }; |
2460 | |
2461 | #if __cplusplus >= 201402L |
2462 | /// Alias template for aligned_storage |
2463 | template<size_t _Len, size_t _Align = |
2464 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> |
2465 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; |
2466 | |
2467 | template <size_t _Len, typename... _Types> |
2468 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; |
2469 | |
2470 | /// Alias template for decay |
2471 | template<typename _Tp> |
2472 | using decay_t = typename decay<_Tp>::type; |
2473 | |
2474 | /// Alias template for enable_if |
2475 | template<bool _Cond, typename _Tp = void> |
2476 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; |
2477 | |
2478 | /// Alias template for conditional |
2479 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2480 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; |
2481 | |
2482 | /// Alias template for common_type |
2483 | template<typename... _Tp> |
2484 | using common_type_t = typename common_type<_Tp...>::type; |
2485 | |
2486 | /// Alias template for underlying_type |
2487 | template<typename _Tp> |
2488 | using underlying_type_t = typename underlying_type<_Tp>::type; |
2489 | |
2490 | /// Alias template for result_of |
2491 | template<typename _Tp> |
2492 | using result_of_t = typename result_of<_Tp>::type; |
2493 | #endif // C++14 |
2494 | |
2495 | // __enable_if_t (std::enable_if_t for C++11) |
2496 | template<bool _Cond, typename _Tp = void> |
2497 | using __enable_if_t = typename enable_if<_Cond, _Tp>::type; |
2498 | |
2499 | // __void_t (std::void_t for C++11) |
2500 | template<typename...> using __void_t = void; |
2501 | |
2502 | #if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11 |
2503 | #define __cpp_lib_void_t 201411 |
2504 | /// A metafunction that always yields void, used for detecting valid types. |
2505 | template<typename...> using void_t = void; |
2506 | #endif |
2507 | |
2508 | /// Implementation of the detection idiom (negative case). |
2509 | template<typename _Default, typename _AlwaysVoid, |
2510 | template<typename...> class _Op, typename... _Args> |
2511 | struct __detector |
2512 | { |
2513 | using value_t = false_type; |
2514 | using type = _Default; |
2515 | }; |
2516 | |
2517 | /// Implementation of the detection idiom (positive case). |
2518 | template<typename _Default, template<typename...> class _Op, |
2519 | typename... _Args> |
2520 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> |
2521 | { |
2522 | using value_t = true_type; |
2523 | using type = _Op<_Args...>; |
2524 | }; |
2525 | |
2526 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. |
2527 | template<typename _Default, template<typename...> class _Op, |
2528 | typename... _Args> |
2529 | using __detected_or = __detector<_Default, void, _Op, _Args...>; |
2530 | |
2531 | // _Op<_Args...> if that is a valid type, otherwise _Default. |
2532 | template<typename _Default, template<typename...> class _Op, |
2533 | typename... _Args> |
2534 | using __detected_or_t |
2535 | = typename __detected_or<_Default, _Op, _Args...>::type; |
2536 | |
2537 | /// @} group metaprogramming |
2538 | |
2539 | /** |
2540 | * Use SFINAE to determine if the type _Tp has a publicly-accessible |
2541 | * member type _NTYPE. |
2542 | */ |
2543 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
2544 | template<typename _Tp, typename = __void_t<>> \ |
2545 | struct __has_##_NTYPE \ |
2546 | : false_type \ |
2547 | { }; \ |
2548 | template<typename _Tp> \ |
2549 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ |
2550 | : true_type \ |
2551 | { }; |
2552 | |
2553 | template <typename _Tp> |
2554 | struct __is_swappable; |
2555 | |
2556 | template <typename _Tp> |
2557 | struct __is_nothrow_swappable; |
2558 | |
2559 | template<typename... _Elements> |
2560 | class tuple; |
2561 | |
2562 | template<typename> |
2563 | struct __is_tuple_like_impl : false_type |
2564 | { }; |
2565 | |
2566 | template<typename... _Tps> |
2567 | struct __is_tuple_like_impl<tuple<_Tps...>> : true_type |
2568 | { }; |
2569 | |
2570 | // Internal type trait that allows us to sfinae-protect tuple_cat. |
2571 | template<typename _Tp> |
2572 | struct __is_tuple_like |
2573 | : public __is_tuple_like_impl<typename remove_cv< |
2574 | typename remove_reference<_Tp>::type>::type>::type |
2575 | { }; |
2576 | |
2577 | template<typename _Tp> |
2578 | inline |
2579 | typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>, |
2580 | is_move_constructible<_Tp>, |
2581 | is_move_assignable<_Tp>>::value>::type |
2582 | swap(_Tp&, _Tp&) |
2583 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, |
2584 | is_nothrow_move_assignable<_Tp>>::value); |
2585 | |
2586 | template<typename _Tp, size_t _Nm> |
2587 | inline |
2588 | typename enable_if<__is_swappable<_Tp>::value>::type |
2589 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) |
2590 | noexcept(__is_nothrow_swappable<_Tp>::value); |
2591 | |
2592 | namespace __swappable_details { |
2593 | using std::swap; |
2594 | |
2595 | struct __do_is_swappable_impl |
2596 | { |
2597 | template<typename _Tp, typename |
2598 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> |
2599 | static true_type __test(int); |
2600 | |
2601 | template<typename> |
2602 | static false_type __test(...); |
2603 | }; |
2604 | |
2605 | struct __do_is_nothrow_swappable_impl |
2606 | { |
2607 | template<typename _Tp> |
2608 | static __bool_constant< |
2609 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) |
2610 | > __test(int); |
2611 | |
2612 | template<typename> |
2613 | static false_type __test(...); |
2614 | }; |
2615 | |
2616 | } // namespace __swappable_details |
2617 | |
2618 | template<typename _Tp> |
2619 | struct __is_swappable_impl |
2620 | : public __swappable_details::__do_is_swappable_impl |
2621 | { |
2622 | typedef decltype(__test<_Tp>(0)) type; |
2623 | }; |
2624 | |
2625 | template<typename _Tp> |
2626 | struct __is_nothrow_swappable_impl |
2627 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2628 | { |
2629 | typedef decltype(__test<_Tp>(0)) type; |
2630 | }; |
2631 | |
2632 | template<typename _Tp> |
2633 | struct __is_swappable |
2634 | : public __is_swappable_impl<_Tp>::type |
2635 | { }; |
2636 | |
2637 | template<typename _Tp> |
2638 | struct __is_nothrow_swappable |
2639 | : public __is_nothrow_swappable_impl<_Tp>::type |
2640 | { }; |
2641 | |
2642 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2643 | #define __cpp_lib_is_swappable 201603 |
2644 | /// Metafunctions used for detecting swappable types: p0185r1 |
2645 | |
2646 | /// is_swappable |
2647 | template<typename _Tp> |
2648 | struct is_swappable |
2649 | : public __is_swappable_impl<_Tp>::type |
2650 | { }; |
2651 | |
2652 | /// is_nothrow_swappable |
2653 | template<typename _Tp> |
2654 | struct is_nothrow_swappable |
2655 | : public __is_nothrow_swappable_impl<_Tp>::type |
2656 | { }; |
2657 | |
2658 | #if __cplusplus >= 201402L |
2659 | /// is_swappable_v |
2660 | template<typename _Tp> |
2661 | _GLIBCXX17_INLINE constexpr bool is_swappable_v = |
2662 | is_swappable<_Tp>::value; |
2663 | |
2664 | /// is_nothrow_swappable_v |
2665 | template<typename _Tp> |
2666 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v = |
2667 | is_nothrow_swappable<_Tp>::value; |
2668 | #endif // __cplusplus >= 201402L |
2669 | |
2670 | namespace __swappable_with_details { |
2671 | using std::swap; |
2672 | |
2673 | struct __do_is_swappable_with_impl |
2674 | { |
2675 | template<typename _Tp, typename _Up, typename |
2676 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), |
2677 | typename |
2678 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> |
2679 | static true_type __test(int); |
2680 | |
2681 | template<typename, typename> |
2682 | static false_type __test(...); |
2683 | }; |
2684 | |
2685 | struct __do_is_nothrow_swappable_with_impl |
2686 | { |
2687 | template<typename _Tp, typename _Up> |
2688 | static __bool_constant< |
2689 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) |
2690 | && |
2691 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) |
2692 | > __test(int); |
2693 | |
2694 | template<typename, typename> |
2695 | static false_type __test(...); |
2696 | }; |
2697 | |
2698 | } // namespace __swappable_with_details |
2699 | |
2700 | template<typename _Tp, typename _Up> |
2701 | struct __is_swappable_with_impl |
2702 | : public __swappable_with_details::__do_is_swappable_with_impl |
2703 | { |
2704 | typedef decltype(__test<_Tp, _Up>(0)) type; |
2705 | }; |
2706 | |
2707 | // Optimization for the homogenous lvalue case, not required: |
2708 | template<typename _Tp> |
2709 | struct __is_swappable_with_impl<_Tp&, _Tp&> |
2710 | : public __swappable_details::__do_is_swappable_impl |
2711 | { |
2712 | typedef decltype(__test<_Tp&>(0)) type; |
2713 | }; |
2714 | |
2715 | template<typename _Tp, typename _Up> |
2716 | struct __is_nothrow_swappable_with_impl |
2717 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl |
2718 | { |
2719 | typedef decltype(__test<_Tp, _Up>(0)) type; |
2720 | }; |
2721 | |
2722 | // Optimization for the homogenous lvalue case, not required: |
2723 | template<typename _Tp> |
2724 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> |
2725 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2726 | { |
2727 | typedef decltype(__test<_Tp&>(0)) type; |
2728 | }; |
2729 | |
2730 | /// is_swappable_with |
2731 | template<typename _Tp, typename _Up> |
2732 | struct is_swappable_with |
2733 | : public __is_swappable_with_impl<_Tp, _Up>::type |
2734 | { }; |
2735 | |
2736 | /// is_nothrow_swappable_with |
2737 | template<typename _Tp, typename _Up> |
2738 | struct is_nothrow_swappable_with |
2739 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type |
2740 | { }; |
2741 | |
2742 | #if __cplusplus >= 201402L |
2743 | /// is_swappable_with_v |
2744 | template<typename _Tp, typename _Up> |
2745 | _GLIBCXX17_INLINE constexpr bool is_swappable_with_v = |
2746 | is_swappable_with<_Tp, _Up>::value; |
2747 | |
2748 | /// is_nothrow_swappable_with_v |
2749 | template<typename _Tp, typename _Up> |
2750 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v = |
2751 | is_nothrow_swappable_with<_Tp, _Up>::value; |
2752 | #endif // __cplusplus >= 201402L |
2753 | |
2754 | #endif// c++1z or gnu++11 |
2755 | |
2756 | // __is_invocable (std::is_invocable for C++11) |
2757 | |
2758 | template<typename _Result, typename _Ret, typename = void> |
2759 | struct __is_invocable_impl : false_type { }; |
2760 | |
2761 | template<typename _Result, typename _Ret> |
2762 | struct __is_invocable_impl<_Result, _Ret, __void_t<typename _Result::type>> |
2763 | : __or_<is_void<_Ret>, is_convertible<typename _Result::type, _Ret>>::type |
2764 | { }; |
2765 | |
2766 | template<typename _Fn, typename... _ArgTypes> |
2767 | struct __is_invocable |
2768 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type |
2769 | { }; |
2770 | |
2771 | template<typename _Fn, typename _Tp, typename... _Args> |
2772 | constexpr bool __call_is_nt(__invoke_memfun_ref) |
2773 | { |
2774 | using _Up = typename __inv_unwrap<_Tp>::type; |
2775 | return noexcept((std::declval<_Up>().*std::declval<_Fn>())( |
2776 | std::declval<_Args>()...)); |
2777 | } |
2778 | |
2779 | template<typename _Fn, typename _Tp, typename... _Args> |
2780 | constexpr bool __call_is_nt(__invoke_memfun_deref) |
2781 | { |
2782 | return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())( |
2783 | std::declval<_Args>()...)); |
2784 | } |
2785 | |
2786 | template<typename _Fn, typename _Tp> |
2787 | constexpr bool __call_is_nt(__invoke_memobj_ref) |
2788 | { |
2789 | using _Up = typename __inv_unwrap<_Tp>::type; |
2790 | return noexcept(std::declval<_Up>().*std::declval<_Fn>()); |
2791 | } |
2792 | |
2793 | template<typename _Fn, typename _Tp> |
2794 | constexpr bool __call_is_nt(__invoke_memobj_deref) |
2795 | { |
2796 | return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>()); |
2797 | } |
2798 | |
2799 | template<typename _Fn, typename... _Args> |
2800 | constexpr bool __call_is_nt(__invoke_other) |
2801 | { |
2802 | return noexcept(std::declval<_Fn>()(std::declval<_Args>()...)); |
2803 | } |
2804 | |
2805 | template<typename _Result, typename _Fn, typename... _Args> |
2806 | struct __call_is_nothrow |
2807 | : __bool_constant< |
2808 | std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{}) |
2809 | > |
2810 | { }; |
2811 | |
2812 | template<typename _Fn, typename... _Args> |
2813 | using __call_is_nothrow_ |
2814 | = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>; |
2815 | |
2816 | // __is_nothrow_invocable (std::is_nothrow_invocable for C++11) |
2817 | template<typename _Fn, typename... _Args> |
2818 | struct __is_nothrow_invocable |
2819 | : __and_<__is_invocable<_Fn, _Args...>, |
2820 | __call_is_nothrow_<_Fn, _Args...>>::type |
2821 | { }; |
2822 | |
2823 | struct __nonesuch { |
2824 | __nonesuch() = delete; |
2825 | ~__nonesuch() = delete; |
2826 | __nonesuch(__nonesuch const&) = delete; |
2827 | void operator=(__nonesuch const&) = delete; |
2828 | }; |
2829 | |
2830 | #if __cplusplus > 201402L |
2831 | # define __cpp_lib_is_invocable 201703 |
2832 | |
2833 | /// std::invoke_result |
2834 | template<typename _Functor, typename... _ArgTypes> |
2835 | struct invoke_result |
2836 | : public __invoke_result<_Functor, _ArgTypes...> |
2837 | { }; |
2838 | |
2839 | /// std::invoke_result_t |
2840 | template<typename _Fn, typename... _Args> |
2841 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; |
2842 | |
2843 | /// std::is_invocable |
2844 | template<typename _Fn, typename... _ArgTypes> |
2845 | struct is_invocable |
2846 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type |
2847 | { }; |
2848 | |
2849 | /// std::is_invocable_r |
2850 | template<typename _Ret, typename _Fn, typename... _ArgTypes> |
2851 | struct is_invocable_r |
2852 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type |
2853 | { }; |
2854 | |
2855 | /// std::is_nothrow_invocable |
2856 | template<typename _Fn, typename... _ArgTypes> |
2857 | struct is_nothrow_invocable |
2858 | : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>, |
2859 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
2860 | { }; |
2861 | |
2862 | template<typename _Result, typename _Ret, typename = void> |
2863 | struct __is_nt_invocable_impl : false_type { }; |
2864 | |
2865 | template<typename _Result, typename _Ret> |
2866 | struct __is_nt_invocable_impl<_Result, _Ret, |
2867 | __void_t<typename _Result::type>> |
2868 | : __or_<is_void<_Ret>, |
2869 | __and_<is_convertible<typename _Result::type, _Ret>, |
2870 | is_nothrow_constructible<_Ret, typename _Result::type>>> |
2871 | { }; |
2872 | |
2873 | /// std::is_nothrow_invocable_r |
2874 | template<typename _Ret, typename _Fn, typename... _ArgTypes> |
2875 | struct is_nothrow_invocable_r |
2876 | : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>, |
2877 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
2878 | { }; |
2879 | |
2880 | /// std::is_invocable_v |
2881 | template<typename _Fn, typename... _Args> |
2882 | inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value; |
2883 | |
2884 | /// std::is_nothrow_invocable_v |
2885 | template<typename _Fn, typename... _Args> |
2886 | inline constexpr bool is_nothrow_invocable_v |
2887 | = is_nothrow_invocable<_Fn, _Args...>::value; |
2888 | |
2889 | /// std::is_invocable_r_v |
2890 | template<typename _Fn, typename... _Args> |
2891 | inline constexpr bool is_invocable_r_v |
2892 | = is_invocable_r<_Fn, _Args...>::value; |
2893 | |
2894 | /// std::is_nothrow_invocable_r_v |
2895 | template<typename _Fn, typename... _Args> |
2896 | inline constexpr bool is_nothrow_invocable_r_v |
2897 | = is_nothrow_invocable_r<_Fn, _Args...>::value; |
2898 | #endif // C++17 |
2899 | |
2900 | #if __cplusplus > 201402L |
2901 | # define __cpp_lib_type_trait_variable_templates 201510L |
2902 | template <typename _Tp> |
2903 | inline constexpr bool is_void_v = is_void<_Tp>::value; |
2904 | template <typename _Tp> |
2905 | inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; |
2906 | template <typename _Tp> |
2907 | inline constexpr bool is_integral_v = is_integral<_Tp>::value; |
2908 | template <typename _Tp> |
2909 | inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; |
2910 | template <typename _Tp> |
2911 | inline constexpr bool is_array_v = is_array<_Tp>::value; |
2912 | template <typename _Tp> |
2913 | inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |
2914 | template <typename _Tp> |
2915 | inline constexpr bool is_lvalue_reference_v = |
2916 | is_lvalue_reference<_Tp>::value; |
2917 | template <typename _Tp> |
2918 | inline constexpr bool is_rvalue_reference_v = |
2919 | is_rvalue_reference<_Tp>::value; |
2920 | template <typename _Tp> |
2921 | inline constexpr bool is_member_object_pointer_v = |
2922 | is_member_object_pointer<_Tp>::value; |
2923 | template <typename _Tp> |
2924 | inline constexpr bool is_member_function_pointer_v = |
2925 | is_member_function_pointer<_Tp>::value; |
2926 | template <typename _Tp> |
2927 | inline constexpr bool is_enum_v = is_enum<_Tp>::value; |
2928 | template <typename _Tp> |
2929 | inline constexpr bool is_union_v = is_union<_Tp>::value; |
2930 | template <typename _Tp> |
2931 | inline constexpr bool is_class_v = is_class<_Tp>::value; |
2932 | template <typename _Tp> |
2933 | inline constexpr bool is_function_v = is_function<_Tp>::value; |
2934 | template <typename _Tp> |
2935 | inline constexpr bool is_reference_v = is_reference<_Tp>::value; |
2936 | template <typename _Tp> |
2937 | inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; |
2938 | template <typename _Tp> |
2939 | inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; |
2940 | template <typename _Tp> |
2941 | inline constexpr bool is_object_v = is_object<_Tp>::value; |
2942 | template <typename _Tp> |
2943 | inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
2944 | template <typename _Tp> |
2945 | inline constexpr bool is_compound_v = is_compound<_Tp>::value; |
2946 | template <typename _Tp> |
2947 | inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; |
2948 | template <typename _Tp> |
2949 | inline constexpr bool is_const_v = is_const<_Tp>::value; |
2950 | template <typename _Tp> |
2951 | inline constexpr bool is_volatile_v = is_volatile<_Tp>::value; |
2952 | template <typename _Tp> |
2953 | inline constexpr bool is_trivial_v = is_trivial<_Tp>::value; |
2954 | template <typename _Tp> |
2955 | inline constexpr bool is_trivially_copyable_v = |
2956 | is_trivially_copyable<_Tp>::value; |
2957 | template <typename _Tp> |
2958 | inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; |
2959 | template <typename _Tp> |
2960 | inline constexpr bool is_pod_v = is_pod<_Tp>::value; |
2961 | template <typename _Tp> |
2962 | inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; |
2963 | template <typename _Tp> |
2964 | inline constexpr bool is_empty_v = is_empty<_Tp>::value; |
2965 | template <typename _Tp> |
2966 | inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; |
2967 | template <typename _Tp> |
2968 | inline constexpr bool is_abstract_v = is_abstract<_Tp>::value; |
2969 | template <typename _Tp> |
2970 | inline constexpr bool is_final_v = is_final<_Tp>::value; |
2971 | template <typename _Tp> |
2972 | inline constexpr bool is_signed_v = is_signed<_Tp>::value; |
2973 | template <typename _Tp> |
2974 | inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; |
2975 | template <typename _Tp, typename... _Args> |
2976 | inline constexpr bool is_constructible_v = |
2977 | is_constructible<_Tp, _Args...>::value; |
2978 | template <typename _Tp> |
2979 | inline constexpr bool is_default_constructible_v = |
2980 | is_default_constructible<_Tp>::value; |
2981 | template <typename _Tp> |
2982 | inline constexpr bool is_copy_constructible_v = |
2983 | is_copy_constructible<_Tp>::value; |
2984 | template <typename _Tp> |
2985 | inline constexpr bool is_move_constructible_v = |
2986 | is_move_constructible<_Tp>::value; |
2987 | template <typename _Tp, typename _Up> |
2988 | inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; |
2989 | template <typename _Tp> |
2990 | inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; |
2991 | template <typename _Tp> |
2992 | inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; |
2993 | template <typename _Tp> |
2994 | inline constexpr bool is_destructible_v = is_destructible<_Tp>::value; |
2995 | template <typename _Tp, typename... _Args> |
2996 | inline constexpr bool is_trivially_constructible_v = |
2997 | is_trivially_constructible<_Tp, _Args...>::value; |
2998 | template <typename _Tp> |
2999 | inline constexpr bool is_trivially_default_constructible_v = |
3000 | is_trivially_default_constructible<_Tp>::value; |
3001 | template <typename _Tp> |
3002 | inline constexpr bool is_trivially_copy_constructible_v = |
3003 | is_trivially_copy_constructible<_Tp>::value; |
3004 | template <typename _Tp> |
3005 | inline constexpr bool is_trivially_move_constructible_v = |
3006 | is_trivially_move_constructible<_Tp>::value; |
3007 | template <typename _Tp, typename _Up> |
3008 | inline constexpr bool is_trivially_assignable_v = |
3009 | is_trivially_assignable<_Tp, _Up>::value; |
3010 | template <typename _Tp> |
3011 | inline constexpr bool is_trivially_copy_assignable_v = |
3012 | is_trivially_copy_assignable<_Tp>::value; |
3013 | template <typename _Tp> |
3014 | inline constexpr bool is_trivially_move_assignable_v = |
3015 | is_trivially_move_assignable<_Tp>::value; |
3016 | template <typename _Tp> |
3017 | inline constexpr bool is_trivially_destructible_v = |
3018 | is_trivially_destructible<_Tp>::value; |
3019 | template <typename _Tp, typename... _Args> |
3020 | inline constexpr bool is_nothrow_constructible_v = |
3021 | is_nothrow_constructible<_Tp, _Args...>::value; |
3022 | template <typename _Tp> |
3023 | inline constexpr bool is_nothrow_default_constructible_v = |
3024 | is_nothrow_default_constructible<_Tp>::value; |
3025 | template <typename _Tp> |
3026 | inline constexpr bool is_nothrow_copy_constructible_v = |
3027 | is_nothrow_copy_constructible<_Tp>::value; |
3028 | template <typename _Tp> |
3029 | inline constexpr bool is_nothrow_move_constructible_v = |
3030 | is_nothrow_move_constructible<_Tp>::value; |
3031 | template <typename _Tp, typename _Up> |
3032 | inline constexpr bool is_nothrow_assignable_v = |
3033 | is_nothrow_assignable<_Tp, _Up>::value; |
3034 | template <typename _Tp> |
3035 | inline constexpr bool is_nothrow_copy_assignable_v = |
3036 | is_nothrow_copy_assignable<_Tp>::value; |
3037 | template <typename _Tp> |
3038 | inline constexpr bool is_nothrow_move_assignable_v = |
3039 | is_nothrow_move_assignable<_Tp>::value; |
3040 | template <typename _Tp> |
3041 | inline constexpr bool is_nothrow_destructible_v = |
3042 | is_nothrow_destructible<_Tp>::value; |
3043 | template <typename _Tp> |
3044 | inline constexpr bool has_virtual_destructor_v = |
3045 | has_virtual_destructor<_Tp>::value; |
3046 | template <typename _Tp> |
3047 | inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value; |
3048 | template <typename _Tp> |
3049 | inline constexpr size_t rank_v = rank<_Tp>::value; |
3050 | template <typename _Tp, unsigned _Idx = 0> |
3051 | inline constexpr size_t extent_v = extent<_Tp, _Idx>::value; |
3052 | template <typename _Tp, typename _Up> |
3053 | inline constexpr bool is_same_v = is_same<_Tp, _Up>::value; |
3054 | template <typename _Base, typename _Derived> |
3055 | inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; |
3056 | template <typename _From, typename _To> |
3057 | inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value; |
3058 | |
3059 | #if __GNUC__ >= 7 |
3060 | # define _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP 1 |
3061 | #elif defined(__is_identifier) |
3062 | // For non-GNU compilers: |
3063 | # if ! __is_identifier(__has_unique_object_representations) |
3064 | # define _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP 1 |
3065 | # endif |
3066 | #endif |
3067 | |
3068 | #ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP |
3069 | # define __cpp_lib_has_unique_object_representations 201606 |
3070 | /// has_unique_object_representations |
3071 | template<typename _Tp> |
3072 | struct has_unique_object_representations |
3073 | : bool_constant<__has_unique_object_representations( |
3074 | remove_cv_t<remove_all_extents_t<_Tp>> |
3075 | )> |
3076 | { }; |
3077 | |
3078 | template<typename _Tp> |
3079 | inline constexpr bool has_unique_object_representations_v |
3080 | = has_unique_object_representations<_Tp>::value; |
3081 | #endif |
3082 | #undef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP |
3083 | |
3084 | #if __GNUC__ >= 7 |
3085 | # define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1 |
3086 | #elif defined(__is_identifier) |
3087 | // For non-GNU compilers: |
3088 | # if ! __is_identifier(__is_aggregate) |
3089 | # define _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE 1 |
3090 | # endif |
3091 | #endif |
3092 | |
3093 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE |
3094 | #define __cpp_lib_is_aggregate 201703 |
3095 | /// is_aggregate |
3096 | template<typename _Tp> |
3097 | struct is_aggregate |
3098 | : bool_constant<__is_aggregate(remove_cv_t<_Tp>)> { }; |
3099 | |
3100 | /// is_aggregate_v |
3101 | template<typename _Tp> |
3102 | inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value; |
3103 | #endif |
3104 | #undef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE |
3105 | |
3106 | #endif // C++17 |
3107 | |
3108 | _GLIBCXX_END_NAMESPACE_VERSION |
3109 | } // namespace std |
3110 | |
3111 | #endif // C++11 |
3112 | |
3113 | #endif // _GLIBCXX_TYPE_TRAITS |
3114 | |