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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 { return value; } | |
75 | #if __cplusplus > 201103L | |
76 | ||
77 | #define __cpp_lib_integral_constant_callable 201304 | |
78 | ||
79 | constexpr value_type operator()() const { 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 integral_constant<bool, !_Pp::value> | |
155 | { }; | |
156 | ||
157 | #if __cplusplus > 201402L | |
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 | constexpr bool conjunction_v | |
178 | = conjunction<_Bn...>::value; | |
179 | ||
180 | template<typename... _Bn> | |
181 | constexpr bool disjunction_v | |
182 | = disjunction<_Bn...>::value; | |
183 | ||
184 | template<typename _Pp> | |
185 | constexpr bool negation_v | |
186 | = negation<_Pp>::value; | |
187 | ||
188 | #endif | |
189 | ||
190 | // For several sfinae-friendly trait implementations we transport both the | |
191 | // result information (as the member type) and the failure information (no | |
192 | // member type). This is very similar to std::enable_if, but we cannot use | |
193 | // them, because we need to derive from them as an implementation detail. | |
194 | ||
195 | template<typename _Tp> | |
196 | struct __success_type | |
197 | { typedef _Tp type; }; | |
198 | ||
199 | struct __failure_type | |
200 | { }; | |
201 | ||
202 | // Primary type categories. | |
203 | ||
204 | template<typename> | |
205 | struct remove_cv; | |
206 | ||
207 | template<typename> | |
208 | struct __is_void_helper | |
209 | : public false_type { }; | |
210 | ||
211 | template<> | |
212 | struct __is_void_helper<void> | |
213 | : public true_type { }; | |
214 | ||
215 | /// is_void | |
216 | template<typename _Tp> | |
217 | struct is_void | |
218 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type | |
219 | { }; | |
220 | ||
221 | template<typename> | |
222 | struct __is_integral_helper | |
223 | : public false_type { }; | |
224 | ||
225 | template<> | |
226 | struct __is_integral_helper<bool> | |
227 | : public true_type { }; | |
228 | ||
229 | template<> | |
230 | struct __is_integral_helper<char> | |
231 | : public true_type { }; | |
232 | ||
233 | template<> | |
234 | struct __is_integral_helper<signed char> | |
235 | : public true_type { }; | |
236 | ||
237 | template<> | |
238 | struct __is_integral_helper<unsigned char> | |
239 | : public true_type { }; | |
240 | ||
241 | #ifdef _GLIBCXX_USE_WCHAR_T | |
242 | template<> | |
243 | struct __is_integral_helper<wchar_t> | |
244 | : public true_type { }; | |
245 | #endif | |
246 | ||
247 | template<> | |
248 | struct __is_integral_helper<char16_t> | |
249 | : public true_type { }; | |
250 | ||
251 | template<> | |
252 | struct __is_integral_helper<char32_t> | |
253 | : public true_type { }; | |
254 | ||
255 | template<> | |
256 | struct __is_integral_helper<short> | |
257 | : public true_type { }; | |
258 | ||
259 | template<> | |
260 | struct __is_integral_helper<unsigned short> | |
261 | : public true_type { }; | |
262 | ||
263 | template<> | |
264 | struct __is_integral_helper<int> | |
265 | : public true_type { }; | |
266 | ||
267 | template<> | |
268 | struct __is_integral_helper<unsigned int> | |
269 | : public true_type { }; | |
270 | ||
271 | template<> | |
272 | struct __is_integral_helper<long> | |
273 | : public true_type { }; | |
274 | ||
275 | template<> | |
276 | struct __is_integral_helper<unsigned long> | |
277 | : public true_type { }; | |
278 | ||
279 | template<> | |
280 | struct __is_integral_helper<long long> | |
281 | : public true_type { }; | |
282 | ||
283 | template<> | |
284 | struct __is_integral_helper<unsigned long long> | |
285 | : public true_type { }; | |
286 | ||
287 | // Conditionalizing on __STRICT_ANSI__ here will break any port that | |
288 | // uses one of these types for size_t. | |
289 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
290 | template<> | |
291 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> | |
292 | : public true_type { }; | |
293 | ||
294 | template<> | |
295 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> | |
296 | : public true_type { }; | |
297 | #endif | |
298 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
299 | template<> | |
300 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
301 | : public true_type { }; | |
302 | ||
303 | template<> | |
304 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
305 | : public true_type { }; | |
306 | #endif | |
307 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
308 | template<> | |
309 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
310 | : public true_type { }; | |
311 | ||
312 | template<> | |
313 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
314 | : public true_type { }; | |
315 | #endif | |
316 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
317 | template<> | |
318 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
319 | : public true_type { }; | |
320 | ||
321 | template<> | |
322 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
323 | : public true_type { }; | |
324 | #endif | |
325 | ||
326 | /// is_integral | |
327 | template<typename _Tp> | |
328 | struct is_integral | |
329 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type | |
330 | { }; | |
331 | ||
332 | template<typename> | |
333 | struct __is_floating_point_helper | |
334 | : public false_type { }; | |
335 | ||
336 | template<> | |
337 | struct __is_floating_point_helper<float> | |
338 | : public true_type { }; | |
339 | ||
340 | template<> | |
341 | struct __is_floating_point_helper<double> | |
342 | : public true_type { }; | |
343 | ||
344 | template<> | |
345 | struct __is_floating_point_helper<long double> | |
346 | : public true_type { }; | |
347 | ||
348 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) | |
349 | template<> | |
350 | struct __is_floating_point_helper<__float128> | |
351 | : public true_type { }; | |
352 | #endif | |
353 | ||
354 | /// is_floating_point | |
355 | template<typename _Tp> | |
356 | struct is_floating_point | |
357 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type | |
358 | { }; | |
359 | ||
360 | /// is_array | |
361 | template<typename> | |
362 | struct is_array | |
363 | : public false_type { }; | |
364 | ||
365 | template<typename _Tp, std::size_t _Size> | |
366 | struct is_array<_Tp[_Size]> | |
367 | : public true_type { }; | |
368 | ||
369 | template<typename _Tp> | |
370 | struct is_array<_Tp[]> | |
371 | : public true_type { }; | |
372 | ||
373 | template<typename> | |
374 | struct __is_pointer_helper | |
375 | : public false_type { }; | |
376 | ||
377 | template<typename _Tp> | |
378 | struct __is_pointer_helper<_Tp*> | |
379 | : public true_type { }; | |
380 | ||
381 | /// is_pointer | |
382 | template<typename _Tp> | |
383 | struct is_pointer | |
384 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type | |
385 | { }; | |
386 | ||
387 | /// is_lvalue_reference | |
388 | template<typename> | |
389 | struct is_lvalue_reference | |
390 | : public false_type { }; | |
391 | ||
392 | template<typename _Tp> | |
393 | struct is_lvalue_reference<_Tp&> | |
394 | : public true_type { }; | |
395 | ||
396 | /// is_rvalue_reference | |
397 | template<typename> | |
398 | struct is_rvalue_reference | |
399 | : public false_type { }; | |
400 | ||
401 | template<typename _Tp> | |
402 | struct is_rvalue_reference<_Tp&&> | |
403 | : public true_type { }; | |
404 | ||
405 | template<typename> | |
406 | struct is_function; | |
407 | ||
408 | template<typename> | |
409 | struct __is_member_object_pointer_helper | |
410 | : public false_type { }; | |
411 | ||
412 | template<typename _Tp, typename _Cp> | |
413 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
414 | : public integral_constant<bool, !is_function<_Tp>::value> { }; | |
415 | ||
416 | /// is_member_object_pointer | |
417 | template<typename _Tp> | |
418 | struct is_member_object_pointer | |
419 | : public __is_member_object_pointer_helper< | |
420 | typename remove_cv<_Tp>::type>::type | |
421 | { }; | |
422 | ||
423 | template<typename> | |
424 | struct __is_member_function_pointer_helper | |
425 | : public false_type { }; | |
426 | ||
427 | template<typename _Tp, typename _Cp> | |
428 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
429 | : public integral_constant<bool, is_function<_Tp>::value> { }; | |
430 | ||
431 | /// is_member_function_pointer | |
432 | template<typename _Tp> | |
433 | struct is_member_function_pointer | |
434 | : public __is_member_function_pointer_helper< | |
435 | typename remove_cv<_Tp>::type>::type | |
436 | { }; | |
437 | ||
438 | /// is_enum | |
439 | template<typename _Tp> | |
440 | struct is_enum | |
441 | : public integral_constant<bool, __is_enum(_Tp)> | |
442 | { }; | |
443 | ||
444 | /// is_union | |
445 | template<typename _Tp> | |
446 | struct is_union | |
447 | : public integral_constant<bool, __is_union(_Tp)> | |
448 | { }; | |
449 | ||
450 | /// is_class | |
451 | template<typename _Tp> | |
452 | struct is_class | |
453 | : public integral_constant<bool, __is_class(_Tp)> | |
454 | { }; | |
455 | ||
456 | /// is_function | |
457 | template<typename> | |
458 | struct is_function | |
459 | : public false_type { }; | |
460 | ||
461 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
462 | struct is_function<_Res(_ArgTypes...) _GLIBCXX_NOEXCEPT_QUAL> | |
463 | : public true_type { }; | |
464 | ||
465 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
466 | struct is_function<_Res(_ArgTypes...) & _GLIBCXX_NOEXCEPT_QUAL> | |
467 | : public true_type { }; | |
468 | ||
469 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
470 | struct is_function<_Res(_ArgTypes...) && _GLIBCXX_NOEXCEPT_QUAL> | |
471 | : public true_type { }; | |
472 | ||
473 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
474 | struct is_function<_Res(_ArgTypes......) _GLIBCXX_NOEXCEPT_QUAL> | |
475 | : public true_type { }; | |
476 | ||
477 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
478 | struct is_function<_Res(_ArgTypes......) & _GLIBCXX_NOEXCEPT_QUAL> | |
479 | : public true_type { }; | |
480 | ||
481 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
482 | struct is_function<_Res(_ArgTypes......) && _GLIBCXX_NOEXCEPT_QUAL> | |
483 | : public true_type { }; | |
484 | ||
485 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
486 | struct is_function<_Res(_ArgTypes...) const _GLIBCXX_NOEXCEPT_QUAL> | |
487 | : public true_type { }; | |
488 | ||
489 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
490 | struct is_function<_Res(_ArgTypes...) const & _GLIBCXX_NOEXCEPT_QUAL> | |
491 | : public true_type { }; | |
492 | ||
493 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
494 | struct is_function<_Res(_ArgTypes...) const && _GLIBCXX_NOEXCEPT_QUAL> | |
495 | : public true_type { }; | |
496 | ||
497 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
498 | struct is_function<_Res(_ArgTypes......) const _GLIBCXX_NOEXCEPT_QUAL> | |
499 | : public true_type { }; | |
500 | ||
501 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
502 | struct is_function<_Res(_ArgTypes......) const & _GLIBCXX_NOEXCEPT_QUAL> | |
503 | : public true_type { }; | |
504 | ||
505 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
506 | struct is_function<_Res(_ArgTypes......) const && _GLIBCXX_NOEXCEPT_QUAL> | |
507 | : public true_type { }; | |
508 | ||
509 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
510 | struct is_function<_Res(_ArgTypes...) volatile _GLIBCXX_NOEXCEPT_QUAL> | |
511 | : public true_type { }; | |
512 | ||
513 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
514 | struct is_function<_Res(_ArgTypes...) volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
515 | : public true_type { }; | |
516 | ||
517 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
518 | struct is_function<_Res(_ArgTypes...) volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
519 | : public true_type { }; | |
520 | ||
521 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
522 | struct is_function<_Res(_ArgTypes......) volatile _GLIBCXX_NOEXCEPT_QUAL> | |
523 | : public true_type { }; | |
524 | ||
525 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
526 | struct is_function<_Res(_ArgTypes......) volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
527 | : public true_type { }; | |
528 | ||
529 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
530 | struct is_function<_Res(_ArgTypes......) volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
531 | : public true_type { }; | |
532 | ||
533 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
534 | struct is_function<_Res(_ArgTypes...) const volatile _GLIBCXX_NOEXCEPT_QUAL> | |
535 | : public true_type { }; | |
536 | ||
537 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
538 | struct is_function<_Res(_ArgTypes...) const volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
539 | : public true_type { }; | |
540 | ||
541 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
542 | struct is_function<_Res(_ArgTypes...) const volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
543 | : public true_type { }; | |
544 | ||
545 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
546 | struct is_function<_Res(_ArgTypes......) const volatile _GLIBCXX_NOEXCEPT_QUAL> | |
547 | : public true_type { }; | |
548 | ||
549 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
550 | struct is_function<_Res(_ArgTypes......) const volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
551 | : public true_type { }; | |
552 | ||
553 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> | |
554 | struct is_function<_Res(_ArgTypes......) const volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
555 | : public true_type { }; | |
556 | ||
557 | #define __cpp_lib_is_null_pointer 201309 | |
558 | ||
559 | template<typename> | |
560 | struct __is_null_pointer_helper | |
561 | : public false_type { }; | |
562 | ||
563 | template<> | |
564 | struct __is_null_pointer_helper<std::nullptr_t> | |
565 | : public true_type { }; | |
566 | ||
567 | /// is_null_pointer (LWG 2247). | |
568 | template<typename _Tp> | |
569 | struct is_null_pointer | |
570 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
571 | { }; | |
572 | ||
573 | /// __is_nullptr_t (extension). | |
574 | template<typename _Tp> | |
575 | struct __is_nullptr_t | |
576 | : public is_null_pointer<_Tp> | |
577 | { }; | |
578 | ||
579 | // Composite type categories. | |
580 | ||
581 | /// is_reference | |
582 | template<typename _Tp> | |
583 | struct is_reference | |
584 | : public __or_<is_lvalue_reference<_Tp>, | |
585 | is_rvalue_reference<_Tp>>::type | |
586 | { }; | |
587 | ||
588 | /// is_arithmetic | |
589 | template<typename _Tp> | |
590 | struct is_arithmetic | |
591 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type | |
592 | { }; | |
593 | ||
594 | /// is_fundamental | |
595 | template<typename _Tp> | |
596 | struct is_fundamental | |
597 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, | |
598 | is_null_pointer<_Tp>>::type | |
599 | { }; | |
600 | ||
601 | /// is_object | |
602 | template<typename _Tp> | |
603 | struct is_object | |
604 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, | |
605 | is_void<_Tp>>>::type | |
606 | { }; | |
607 | ||
608 | template<typename> | |
609 | struct is_member_pointer; | |
610 | ||
611 | /// is_scalar | |
612 | template<typename _Tp> | |
613 | struct is_scalar | |
614 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, | |
615 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type | |
616 | { }; | |
617 | ||
618 | /// is_compound | |
619 | template<typename _Tp> | |
620 | struct is_compound | |
621 | : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; | |
622 | ||
623 | template<typename _Tp> | |
624 | struct __is_member_pointer_helper | |
625 | : public false_type { }; | |
626 | ||
627 | template<typename _Tp, typename _Cp> | |
628 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
629 | : public true_type { }; | |
630 | ||
631 | /// is_member_pointer | |
632 | template<typename _Tp> | |
633 | struct is_member_pointer | |
634 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type | |
635 | { }; | |
636 | ||
637 | // Utility to detect referenceable types ([defns.referenceable]). | |
638 | ||
639 | template<typename _Tp> | |
640 | struct __is_referenceable | |
641 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type | |
642 | { }; | |
643 | ||
644 | template<typename _Res, typename... _Args> | |
645 | struct __is_referenceable<_Res(_Args...)> | |
646 | : public true_type | |
647 | { }; | |
648 | ||
649 | template<typename _Res, typename... _Args> | |
650 | struct __is_referenceable<_Res(_Args......)> | |
651 | : public true_type | |
652 | { }; | |
653 | ||
654 | // Type properties. | |
655 | ||
656 | /// is_const | |
657 | template<typename> | |
658 | struct is_const | |
659 | : public false_type { }; | |
660 | ||
661 | template<typename _Tp> | |
662 | struct is_const<_Tp const> | |
663 | : public true_type { }; | |
664 | ||
665 | /// is_volatile | |
666 | template<typename> | |
667 | struct is_volatile | |
668 | : public false_type { }; | |
669 | ||
670 | template<typename _Tp> | |
671 | struct is_volatile<_Tp volatile> | |
672 | : public true_type { }; | |
673 | ||
674 | /// is_trivial | |
675 | template<typename _Tp> | |
676 | struct is_trivial | |
677 | : public integral_constant<bool, __is_trivial(_Tp)> | |
678 | { }; | |
679 | ||
680 | // is_trivially_copyable | |
681 | template<typename _Tp> | |
682 | struct is_trivially_copyable | |
683 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
684 | { }; | |
685 | ||
686 | /// is_standard_layout | |
687 | template<typename _Tp> | |
688 | struct is_standard_layout | |
689 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
690 | { }; | |
691 | ||
692 | /// is_pod | |
693 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
694 | template<typename _Tp> | |
695 | struct is_pod | |
696 | : public integral_constant<bool, __is_pod(_Tp)> | |
697 | { }; | |
698 | ||
699 | /// is_literal_type | |
700 | template<typename _Tp> | |
701 | struct is_literal_type | |
702 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
703 | { }; | |
704 | ||
705 | /// is_empty | |
706 | template<typename _Tp> | |
707 | struct is_empty | |
708 | : public integral_constant<bool, __is_empty(_Tp)> | |
709 | { }; | |
710 | ||
711 | /// is_polymorphic | |
712 | template<typename _Tp> | |
713 | struct is_polymorphic | |
714 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
715 | { }; | |
716 | ||
717 | #if __cplusplus >= 201402L | |
718 | #define __cpp_lib_is_final 201402L | |
719 | /// is_final | |
720 | template<typename _Tp> | |
721 | struct is_final | |
722 | : public integral_constant<bool, __is_final(_Tp)> | |
723 | { }; | |
724 | #endif | |
725 | ||
726 | /// is_abstract | |
727 | template<typename _Tp> | |
728 | struct is_abstract | |
729 | : public integral_constant<bool, __is_abstract(_Tp)> | |
730 | { }; | |
731 | ||
732 | template<typename _Tp, | |
733 | bool = is_arithmetic<_Tp>::value> | |
734 | struct __is_signed_helper | |
735 | : public false_type { }; | |
736 | ||
737 | template<typename _Tp> | |
738 | struct __is_signed_helper<_Tp, true> | |
739 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
740 | { }; | |
741 | ||
742 | /// is_signed | |
743 | template<typename _Tp> | |
744 | struct is_signed | |
745 | : public __is_signed_helper<_Tp>::type | |
746 | { }; | |
747 | ||
748 | /// is_unsigned | |
749 | template<typename _Tp> | |
750 | struct is_unsigned | |
751 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> | |
752 | { }; | |
753 | ||
754 | ||
755 | // Destructible and constructible type properties. | |
756 | ||
757 | template<typename> | |
758 | struct add_rvalue_reference; | |
759 | ||
760 | /** | |
761 | * @brief Utility to simplify expressions used in unevaluated operands | |
762 | * @ingroup utilities | |
763 | */ | |
764 | template<typename _Tp> | |
765 | typename add_rvalue_reference<_Tp>::type declval() noexcept; | |
766 | ||
767 | template<typename, unsigned = 0> | |
768 | struct extent; | |
769 | ||
770 | template<typename> | |
771 | struct remove_all_extents; | |
772 | ||
773 | template<typename _Tp> | |
774 | struct __is_array_known_bounds | |
775 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
776 | { }; | |
777 | ||
778 | template<typename _Tp> | |
779 | struct __is_array_unknown_bounds | |
780 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> | |
781 | { }; | |
782 | ||
783 | // In N3290 is_destructible does not say anything about function | |
784 | // types and abstract types, see LWG 2049. This implementation | |
785 | // describes function types as non-destructible and all complete | |
786 | // object types as destructible, iff the explicit destructor | |
787 | // call expression is wellformed. | |
788 | struct __do_is_destructible_impl | |
789 | { | |
790 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> | |
791 | static true_type __test(int); | |
792 | ||
793 | template<typename> | |
794 | static false_type __test(...); | |
795 | }; | |
796 | ||
797 | template<typename _Tp> | |
798 | struct __is_destructible_impl | |
799 | : public __do_is_destructible_impl | |
800 | { | |
801 | typedef decltype(__test<_Tp>(0)) type; | |
802 | }; | |
803 | ||
804 | template<typename _Tp, | |
805 | bool = __or_<is_void<_Tp>, | |
806 | __is_array_unknown_bounds<_Tp>, | |
807 | is_function<_Tp>>::value, | |
808 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
809 | struct __is_destructible_safe; | |
810 | ||
811 | template<typename _Tp> | |
812 | struct __is_destructible_safe<_Tp, false, false> | |
813 | : public __is_destructible_impl<typename | |
814 | remove_all_extents<_Tp>::type>::type | |
815 | { }; | |
816 | ||
817 | template<typename _Tp> | |
818 | struct __is_destructible_safe<_Tp, true, false> | |
819 | : public false_type { }; | |
820 | ||
821 | template<typename _Tp> | |
822 | struct __is_destructible_safe<_Tp, false, true> | |
823 | : public true_type { }; | |
824 | ||
825 | /// is_destructible | |
826 | template<typename _Tp> | |
827 | struct is_destructible | |
828 | : public __is_destructible_safe<_Tp>::type | |
829 | { }; | |
830 | ||
831 | // is_nothrow_destructible requires that is_destructible is | |
832 | // satisfied as well. We realize that by mimicing the | |
833 | // implementation of is_destructible but refer to noexcept(expr) | |
834 | // instead of decltype(expr). | |
835 | struct __do_is_nt_destructible_impl | |
836 | { | |
837 | template<typename _Tp> | |
838 | static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())> | |
839 | __test(int); | |
840 | ||
841 | template<typename> | |
842 | static false_type __test(...); | |
843 | }; | |
844 | ||
845 | template<typename _Tp> | |
846 | struct __is_nt_destructible_impl | |
847 | : public __do_is_nt_destructible_impl | |
848 | { | |
849 | typedef decltype(__test<_Tp>(0)) type; | |
850 | }; | |
851 | ||
852 | template<typename _Tp, | |
853 | bool = __or_<is_void<_Tp>, | |
854 | __is_array_unknown_bounds<_Tp>, | |
855 | is_function<_Tp>>::value, | |
856 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
857 | struct __is_nt_destructible_safe; | |
858 | ||
859 | template<typename _Tp> | |
860 | struct __is_nt_destructible_safe<_Tp, false, false> | |
861 | : public __is_nt_destructible_impl<typename | |
862 | remove_all_extents<_Tp>::type>::type | |
863 | { }; | |
864 | ||
865 | template<typename _Tp> | |
866 | struct __is_nt_destructible_safe<_Tp, true, false> | |
867 | : public false_type { }; | |
868 | ||
869 | template<typename _Tp> | |
870 | struct __is_nt_destructible_safe<_Tp, false, true> | |
871 | : public true_type { }; | |
872 | ||
873 | /// is_nothrow_destructible | |
874 | template<typename _Tp> | |
875 | struct is_nothrow_destructible | |
876 | : public __is_nt_destructible_safe<_Tp>::type | |
877 | { }; | |
878 | ||
879 | struct __do_is_default_constructible_impl | |
880 | { | |
881 | template<typename _Tp, typename = decltype(_Tp())> | |
882 | static true_type __test(int); | |
883 | ||
884 | template<typename> | |
885 | static false_type __test(...); | |
886 | }; | |
887 | ||
888 | template<typename _Tp> | |
889 | struct __is_default_constructible_impl | |
890 | : public __do_is_default_constructible_impl | |
891 | { | |
892 | typedef decltype(__test<_Tp>(0)) type; | |
893 | }; | |
894 | ||
895 | template<typename _Tp> | |
896 | struct __is_default_constructible_atom | |
897 | : public __and_<__not_<is_void<_Tp>>, | |
898 | __is_default_constructible_impl<_Tp>> | |
899 | { }; | |
900 | ||
901 | template<typename _Tp, bool = is_array<_Tp>::value> | |
902 | struct __is_default_constructible_safe; | |
903 | ||
904 | // The following technique is a workaround for a current core language | |
905 | // restriction, which does not allow for array types to occur in | |
906 | // functional casts of the form T(). Complete arrays can be default- | |
907 | // constructed, if the element type is default-constructible, but | |
908 | // arrays with unknown bounds are not. | |
909 | template<typename _Tp> | |
910 | struct __is_default_constructible_safe<_Tp, true> | |
911 | : public __and_<__is_array_known_bounds<_Tp>, | |
912 | __is_default_constructible_atom<typename | |
913 | remove_all_extents<_Tp>::type>> | |
914 | { }; | |
915 | ||
916 | template<typename _Tp> | |
917 | struct __is_default_constructible_safe<_Tp, false> | |
918 | : public __is_default_constructible_atom<_Tp>::type | |
919 | { }; | |
920 | ||
921 | /// is_default_constructible | |
922 | template<typename _Tp> | |
923 | struct is_default_constructible | |
924 | : public __is_default_constructible_safe<_Tp>::type | |
925 | { }; | |
926 | ||
927 | ||
928 | // Implementation of is_constructible. | |
929 | ||
930 | // The hardest part of this trait is the binary direct-initialization | |
931 | // case, because we hit into a functional cast of the form T(arg). | |
932 | // This implementation uses different strategies depending on the | |
933 | // target type to reduce the test overhead as much as possible: | |
934 | // | |
935 | // a) For a reference target type, we use a static_cast expression | |
936 | // modulo its extra cases. | |
937 | // | |
938 | // b) For a non-reference target type we use a ::new expression. | |
939 | struct __do_is_static_castable_impl | |
940 | { | |
941 | template<typename _From, typename _To, typename | |
942 | = decltype(static_cast<_To>(declval<_From>()))> | |
943 | static true_type __test(int); | |
944 | ||
945 | template<typename, typename> | |
946 | static false_type __test(...); | |
947 | }; | |
948 | ||
949 | template<typename _From, typename _To> | |
950 | struct __is_static_castable_impl | |
951 | : public __do_is_static_castable_impl | |
952 | { | |
953 | typedef decltype(__test<_From, _To>(0)) type; | |
954 | }; | |
955 | ||
956 | template<typename _From, typename _To> | |
957 | struct __is_static_castable_safe | |
958 | : public __is_static_castable_impl<_From, _To>::type | |
959 | { }; | |
960 | ||
961 | // __is_static_castable | |
962 | template<typename _From, typename _To> | |
963 | struct __is_static_castable | |
964 | : public integral_constant<bool, (__is_static_castable_safe< | |
965 | _From, _To>::value)> | |
966 | { }; | |
967 | ||
968 | // Implementation for non-reference types. To meet the proper | |
969 | // variable definition semantics, we also need to test for | |
970 | // is_destructible in this case. | |
971 | // This form should be simplified by a single expression: | |
972 | // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. | |
973 | struct __do_is_direct_constructible_impl | |
974 | { | |
975 | template<typename _Tp, typename _Arg, typename | |
976 | = decltype(::new _Tp(declval<_Arg>()))> | |
977 | static true_type __test(int); | |
978 | ||
979 | template<typename, typename> | |
980 | static false_type __test(...); | |
981 | }; | |
982 | ||
983 | template<typename _Tp, typename _Arg> | |
984 | struct __is_direct_constructible_impl | |
985 | : public __do_is_direct_constructible_impl | |
986 | { | |
987 | typedef decltype(__test<_Tp, _Arg>(0)) type; | |
988 | }; | |
989 | ||
990 | template<typename _Tp, typename _Arg> | |
991 | struct __is_direct_constructible_new_safe | |
992 | : public __and_<is_destructible<_Tp>, | |
993 | __is_direct_constructible_impl<_Tp, _Arg>> | |
994 | { }; | |
995 | ||
996 | template<typename, typename> | |
997 | struct is_same; | |
998 | ||
999 | template<typename, typename> | |
1000 | struct is_base_of; | |
1001 | ||
1002 | template<typename> | |
1003 | struct remove_reference; | |
1004 | ||
1005 | template<typename _From, typename _To, bool | |
1006 | = __not_<__or_<is_void<_From>, | |
1007 | is_function<_From>>>::value> | |
1008 | struct __is_base_to_derived_ref; | |
1009 | ||
1010 | template<typename _Tp, typename... _Args> | |
1011 | struct is_constructible; | |
1012 | ||
1013 | // Detect whether we have a downcast situation during | |
1014 | // reference binding. | |
1015 | template<typename _From, typename _To> | |
1016 | struct __is_base_to_derived_ref<_From, _To, true> | |
1017 | { | |
1018 | typedef typename remove_cv<typename remove_reference<_From | |
1019 | >::type>::type __src_t; | |
1020 | typedef typename remove_cv<typename remove_reference<_To | |
1021 | >::type>::type __dst_t; | |
1022 | typedef __and_<__not_<is_same<__src_t, __dst_t>>, | |
1023 | is_base_of<__src_t, __dst_t>, | |
1024 | __not_<is_constructible<__dst_t, _From>>> type; | |
1025 | static constexpr bool value = type::value; | |
1026 | }; | |
1027 | ||
1028 | template<typename _From, typename _To> | |
1029 | struct __is_base_to_derived_ref<_From, _To, false> | |
1030 | : public false_type | |
1031 | { }; | |
1032 | ||
1033 | template<typename _From, typename _To, bool | |
1034 | = __and_<is_lvalue_reference<_From>, | |
1035 | is_rvalue_reference<_To>>::value> | |
1036 | struct __is_lvalue_to_rvalue_ref; | |
1037 | ||
1038 | // Detect whether we have an lvalue of non-function type | |
1039 | // bound to a reference-compatible rvalue-reference. | |
1040 | template<typename _From, typename _To> | |
1041 | struct __is_lvalue_to_rvalue_ref<_From, _To, true> | |
1042 | { | |
1043 | typedef typename remove_cv<typename remove_reference< | |
1044 | _From>::type>::type __src_t; | |
1045 | typedef typename remove_cv<typename remove_reference< | |
1046 | _To>::type>::type __dst_t; | |
1047 | typedef __and_<__not_<is_function<__src_t>>, | |
1048 | __or_<is_same<__src_t, __dst_t>, | |
1049 | is_base_of<__dst_t, __src_t>>> type; | |
1050 | static constexpr bool value = type::value; | |
1051 | }; | |
1052 | ||
1053 | template<typename _From, typename _To> | |
1054 | struct __is_lvalue_to_rvalue_ref<_From, _To, false> | |
1055 | : public false_type | |
1056 | { }; | |
1057 | ||
1058 | // Here we handle direct-initialization to a reference type as | |
1059 | // equivalent to a static_cast modulo overshooting conversions. | |
1060 | // These are restricted to the following conversions: | |
1061 | // a) A base class value to a derived class reference | |
1062 | // b) An lvalue to an rvalue-reference of reference-compatible | |
1063 | // types that are not functions | |
1064 | template<typename _Tp, typename _Arg> | |
1065 | struct __is_direct_constructible_ref_cast | |
1066 | : public __and_<__is_static_castable<_Arg, _Tp>, | |
1067 | __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, | |
1068 | __is_lvalue_to_rvalue_ref<_Arg, _Tp> | |
1069 | >>> | |
1070 | { }; | |
1071 | ||
1072 | template<typename _Tp, typename _Arg> | |
1073 | struct __is_direct_constructible_new | |
1074 | : public conditional<is_reference<_Tp>::value, | |
1075 | __is_direct_constructible_ref_cast<_Tp, _Arg>, | |
1076 | __is_direct_constructible_new_safe<_Tp, _Arg> | |
1077 | >::type | |
1078 | { }; | |
1079 | ||
1080 | template<typename _Tp, typename _Arg> | |
1081 | struct __is_direct_constructible | |
1082 | : public __is_direct_constructible_new<_Tp, _Arg>::type | |
1083 | { }; | |
1084 | ||
1085 | // Since default-construction and binary direct-initialization have | |
1086 | // been handled separately, the implementation of the remaining | |
1087 | // n-ary construction cases is rather straightforward. We can use | |
1088 | // here a functional cast, because array types are excluded anyway | |
1089 | // and this form is never interpreted as a C cast. | |
1090 | struct __do_is_nary_constructible_impl | |
1091 | { | |
1092 | template<typename _Tp, typename... _Args, typename | |
1093 | = decltype(_Tp(declval<_Args>()...))> | |
1094 | static true_type __test(int); | |
1095 | ||
1096 | template<typename, typename...> | |
1097 | static false_type __test(...); | |
1098 | }; | |
1099 | ||
1100 | template<typename _Tp, typename... _Args> | |
1101 | struct __is_nary_constructible_impl | |
1102 | : public __do_is_nary_constructible_impl | |
1103 | { | |
1104 | typedef decltype(__test<_Tp, _Args...>(0)) type; | |
1105 | }; | |
1106 | ||
1107 | template<typename _Tp, typename... _Args> | |
1108 | struct __is_nary_constructible | |
1109 | : public __is_nary_constructible_impl<_Tp, _Args...>::type | |
1110 | { | |
1111 | static_assert(sizeof...(_Args) > 1, | |
1112 | "Only useful for > 1 arguments"); | |
1113 | }; | |
1114 | ||
1115 | template<typename _Tp, typename... _Args> | |
1116 | struct __is_constructible_impl | |
1117 | : public __is_nary_constructible<_Tp, _Args...> | |
1118 | { }; | |
1119 | ||
1120 | template<typename _Tp, typename _Arg> | |
1121 | struct __is_constructible_impl<_Tp, _Arg> | |
1122 | : public __is_direct_constructible<_Tp, _Arg> | |
1123 | { }; | |
1124 | ||
1125 | template<typename _Tp> | |
1126 | struct __is_constructible_impl<_Tp> | |
1127 | : public is_default_constructible<_Tp> | |
1128 | { }; | |
1129 | ||
1130 | /// is_constructible | |
1131 | template<typename _Tp, typename... _Args> | |
1132 | struct is_constructible | |
1133 | : public __is_constructible_impl<_Tp, _Args...>::type | |
1134 | { }; | |
1135 | ||
1136 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1137 | struct __is_copy_constructible_impl; | |
1138 | ||
1139 | template<typename _Tp> | |
1140 | struct __is_copy_constructible_impl<_Tp, false> | |
1141 | : public false_type { }; | |
1142 | ||
1143 | template<typename _Tp> | |
1144 | struct __is_copy_constructible_impl<_Tp, true> | |
1145 | : public is_constructible<_Tp, const _Tp&> | |
1146 | { }; | |
1147 | ||
1148 | /// is_copy_constructible | |
1149 | template<typename _Tp> | |
1150 | struct is_copy_constructible | |
1151 | : public __is_copy_constructible_impl<_Tp> | |
1152 | { }; | |
1153 | ||
1154 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1155 | struct __is_move_constructible_impl; | |
1156 | ||
1157 | template<typename _Tp> | |
1158 | struct __is_move_constructible_impl<_Tp, false> | |
1159 | : public false_type { }; | |
1160 | ||
1161 | template<typename _Tp> | |
1162 | struct __is_move_constructible_impl<_Tp, true> | |
1163 | : public is_constructible<_Tp, _Tp&&> | |
1164 | { }; | |
1165 | ||
1166 | /// is_move_constructible | |
1167 | template<typename _Tp> | |
1168 | struct is_move_constructible | |
1169 | : public __is_move_constructible_impl<_Tp> | |
1170 | { }; | |
1171 | ||
1172 | template<typename _Tp> | |
1173 | struct __is_nt_default_constructible_atom | |
1174 | : public integral_constant<bool, noexcept(_Tp())> | |
1175 | { }; | |
1176 | ||
1177 | template<typename _Tp, bool = is_array<_Tp>::value> | |
1178 | struct __is_nt_default_constructible_impl; | |
1179 | ||
1180 | template<typename _Tp> | |
1181 | struct __is_nt_default_constructible_impl<_Tp, true> | |
1182 | : public __and_<__is_array_known_bounds<_Tp>, | |
1183 | __is_nt_default_constructible_atom<typename | |
1184 | remove_all_extents<_Tp>::type>> | |
1185 | { }; | |
1186 | ||
1187 | template<typename _Tp> | |
1188 | struct __is_nt_default_constructible_impl<_Tp, false> | |
1189 | : public __is_nt_default_constructible_atom<_Tp> | |
1190 | { }; | |
1191 | ||
1192 | /// is_nothrow_default_constructible | |
1193 | template<typename _Tp> | |
1194 | struct is_nothrow_default_constructible | |
1195 | : public __and_<is_default_constructible<_Tp>, | |
1196 | __is_nt_default_constructible_impl<_Tp>> | |
1197 | { }; | |
1198 | ||
1199 | template<typename _Tp, typename... _Args> | |
1200 | struct __is_nt_constructible_impl | |
1201 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
1202 | { }; | |
1203 | ||
1204 | template<typename _Tp, typename _Arg> | |
1205 | struct __is_nt_constructible_impl<_Tp, _Arg> | |
1206 | : public integral_constant<bool, | |
1207 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
1208 | { }; | |
1209 | ||
1210 | template<typename _Tp> | |
1211 | struct __is_nt_constructible_impl<_Tp> | |
1212 | : public is_nothrow_default_constructible<_Tp> | |
1213 | { }; | |
1214 | ||
1215 | /// is_nothrow_constructible | |
1216 | template<typename _Tp, typename... _Args> | |
1217 | struct is_nothrow_constructible | |
1218 | : public __and_<is_constructible<_Tp, _Args...>, | |
1219 | __is_nt_constructible_impl<_Tp, _Args...>> | |
1220 | { }; | |
1221 | ||
1222 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1223 | struct __is_nothrow_copy_constructible_impl; | |
1224 | ||
1225 | template<typename _Tp> | |
1226 | struct __is_nothrow_copy_constructible_impl<_Tp, false> | |
1227 | : public false_type { }; | |
1228 | ||
1229 | template<typename _Tp> | |
1230 | struct __is_nothrow_copy_constructible_impl<_Tp, true> | |
1231 | : public is_nothrow_constructible<_Tp, const _Tp&> | |
1232 | { }; | |
1233 | ||
1234 | /// is_nothrow_copy_constructible | |
1235 | template<typename _Tp> | |
1236 | struct is_nothrow_copy_constructible | |
1237 | : public __is_nothrow_copy_constructible_impl<_Tp> | |
1238 | { }; | |
1239 | ||
1240 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1241 | struct __is_nothrow_move_constructible_impl; | |
1242 | ||
1243 | template<typename _Tp> | |
1244 | struct __is_nothrow_move_constructible_impl<_Tp, false> | |
1245 | : public false_type { }; | |
1246 | ||
1247 | template<typename _Tp> | |
1248 | struct __is_nothrow_move_constructible_impl<_Tp, true> | |
1249 | : public is_nothrow_constructible<_Tp, _Tp&&> | |
1250 | { }; | |
1251 | ||
1252 | /// is_nothrow_move_constructible | |
1253 | template<typename _Tp> | |
1254 | struct is_nothrow_move_constructible | |
1255 | : public __is_nothrow_move_constructible_impl<_Tp> | |
1256 | { }; | |
1257 | ||
1258 | template<typename _Tp, typename _Up> | |
1259 | class __is_assignable_helper | |
1260 | { | |
1261 | template<typename _Tp1, typename _Up1, | |
1262 | typename = decltype(declval<_Tp1>() = declval<_Up1>())> | |
1263 | static true_type | |
1264 | __test(int); | |
1265 | ||
1266 | template<typename, typename> | |
1267 | static false_type | |
1268 | __test(...); | |
1269 | ||
1270 | public: | |
1271 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
1272 | }; | |
1273 | ||
1274 | /// is_assignable | |
1275 | template<typename _Tp, typename _Up> | |
1276 | struct is_assignable | |
1277 | : public __is_assignable_helper<_Tp, _Up>::type | |
1278 | { }; | |
1279 | ||
1280 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1281 | struct __is_copy_assignable_impl; | |
1282 | ||
1283 | template<typename _Tp> | |
1284 | struct __is_copy_assignable_impl<_Tp, false> | |
1285 | : public false_type { }; | |
1286 | ||
1287 | template<typename _Tp> | |
1288 | struct __is_copy_assignable_impl<_Tp, true> | |
1289 | : public is_assignable<_Tp&, const _Tp&> | |
1290 | { }; | |
1291 | ||
1292 | /// is_copy_assignable | |
1293 | template<typename _Tp> | |
1294 | struct is_copy_assignable | |
1295 | : public __is_copy_assignable_impl<_Tp> | |
1296 | { }; | |
1297 | ||
1298 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1299 | struct __is_move_assignable_impl; | |
1300 | ||
1301 | template<typename _Tp> | |
1302 | struct __is_move_assignable_impl<_Tp, false> | |
1303 | : public false_type { }; | |
1304 | ||
1305 | template<typename _Tp> | |
1306 | struct __is_move_assignable_impl<_Tp, true> | |
1307 | : public is_assignable<_Tp&, _Tp&&> | |
1308 | { }; | |
1309 | ||
1310 | /// is_move_assignable | |
1311 | template<typename _Tp> | |
1312 | struct is_move_assignable | |
1313 | : public __is_move_assignable_impl<_Tp> | |
1314 | { }; | |
1315 | ||
1316 | template<typename _Tp, typename _Up> | |
1317 | struct __is_nt_assignable_impl | |
1318 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1319 | { }; | |
1320 | ||
1321 | /// is_nothrow_assignable | |
1322 | template<typename _Tp, typename _Up> | |
1323 | struct is_nothrow_assignable | |
1324 | : public __and_<is_assignable<_Tp, _Up>, | |
1325 | __is_nt_assignable_impl<_Tp, _Up>> | |
1326 | { }; | |
1327 | ||
1328 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1329 | struct __is_nt_copy_assignable_impl; | |
1330 | ||
1331 | template<typename _Tp> | |
1332 | struct __is_nt_copy_assignable_impl<_Tp, false> | |
1333 | : public false_type { }; | |
1334 | ||
1335 | template<typename _Tp> | |
1336 | struct __is_nt_copy_assignable_impl<_Tp, true> | |
1337 | : public is_nothrow_assignable<_Tp&, const _Tp&> | |
1338 | { }; | |
1339 | ||
1340 | /// is_nothrow_copy_assignable | |
1341 | template<typename _Tp> | |
1342 | struct is_nothrow_copy_assignable | |
1343 | : public __is_nt_copy_assignable_impl<_Tp> | |
1344 | { }; | |
1345 | ||
1346 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1347 | struct __is_nt_move_assignable_impl; | |
1348 | ||
1349 | template<typename _Tp> | |
1350 | struct __is_nt_move_assignable_impl<_Tp, false> | |
1351 | : public false_type { }; | |
1352 | ||
1353 | template<typename _Tp> | |
1354 | struct __is_nt_move_assignable_impl<_Tp, true> | |
1355 | : public is_nothrow_assignable<_Tp&, _Tp&&> | |
1356 | { }; | |
1357 | ||
1358 | /// is_nothrow_move_assignable | |
1359 | template<typename _Tp> | |
1360 | struct is_nothrow_move_assignable | |
1361 | : public __is_nt_move_assignable_impl<_Tp> | |
1362 | { }; | |
1363 | ||
1364 | /// is_trivially_constructible | |
1365 | template<typename _Tp, typename... _Args> | |
1366 | struct is_trivially_constructible | |
1367 | : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool, | |
1368 | __is_trivially_constructible(_Tp, _Args...)>> | |
1369 | { }; | |
1370 | ||
1371 | /// is_trivially_default_constructible | |
1372 | template<typename _Tp> | |
1373 | struct is_trivially_default_constructible | |
1374 | : public is_trivially_constructible<_Tp>::type | |
1375 | { }; | |
1376 | ||
1377 | struct __do_is_implicitly_default_constructible_impl | |
1378 | { | |
1379 | template <typename _Tp> | |
1380 | static void __helper(const _Tp&); | |
1381 | ||
1382 | template <typename _Tp> | |
1383 | static true_type __test(const _Tp&, | |
1384 | decltype(__helper<const _Tp&>({}))* = 0); | |
1385 | ||
1386 | static false_type __test(...); | |
1387 | }; | |
1388 | ||
1389 | template<typename _Tp> | |
1390 | struct __is_implicitly_default_constructible_impl | |
1391 | : public __do_is_implicitly_default_constructible_impl | |
1392 | { | |
1393 | typedef decltype(__test(declval<_Tp>())) type; | |
1394 | }; | |
1395 | ||
1396 | template<typename _Tp> | |
1397 | struct __is_implicitly_default_constructible_safe | |
1398 | : public __is_implicitly_default_constructible_impl<_Tp>::type | |
1399 | { }; | |
1400 | ||
1401 | template <typename _Tp> | |
1402 | struct __is_implicitly_default_constructible | |
1403 | : public __and_<is_default_constructible<_Tp>, | |
1404 | __is_implicitly_default_constructible_safe<_Tp>> | |
1405 | { }; | |
1406 | ||
1407 | /// is_trivially_copy_constructible | |
1408 | template<typename _Tp> | |
1409 | struct is_trivially_copy_constructible | |
1410 | : public __and_<is_copy_constructible<_Tp>, | |
1411 | integral_constant<bool, | |
1412 | __is_trivially_constructible(_Tp, const _Tp&)>> | |
1413 | { }; | |
1414 | ||
1415 | /// is_trivially_move_constructible | |
1416 | template<typename _Tp> | |
1417 | struct is_trivially_move_constructible | |
1418 | : public __and_<is_move_constructible<_Tp>, | |
1419 | integral_constant<bool, | |
1420 | __is_trivially_constructible(_Tp, _Tp&&)>> | |
1421 | { }; | |
1422 | ||
1423 | /// is_trivially_assignable | |
1424 | template<typename _Tp, typename _Up> | |
1425 | struct is_trivially_assignable | |
1426 | : public __and_<is_assignable<_Tp, _Up>, | |
1427 | integral_constant<bool, | |
1428 | __is_trivially_assignable(_Tp, _Up)>> | |
1429 | { }; | |
1430 | ||
1431 | /// is_trivially_copy_assignable | |
1432 | template<typename _Tp> | |
1433 | struct is_trivially_copy_assignable | |
1434 | : public __and_<is_copy_assignable<_Tp>, | |
1435 | integral_constant<bool, | |
1436 | __is_trivially_assignable(_Tp&, const _Tp&)>> | |
1437 | { }; | |
1438 | ||
1439 | /// is_trivially_move_assignable | |
1440 | template<typename _Tp> | |
1441 | struct is_trivially_move_assignable | |
1442 | : public __and_<is_move_assignable<_Tp>, | |
1443 | integral_constant<bool, | |
1444 | __is_trivially_assignable(_Tp&, _Tp&&)>> | |
1445 | { }; | |
1446 | ||
1447 | /// is_trivially_destructible | |
1448 | template<typename _Tp> | |
1449 | struct is_trivially_destructible | |
1450 | : public __and_<is_destructible<_Tp>, integral_constant<bool, | |
1451 | __has_trivial_destructor(_Tp)>> | |
1452 | { }; | |
1453 | ||
1454 | ||
1455 | /// has_virtual_destructor | |
1456 | template<typename _Tp> | |
1457 | struct has_virtual_destructor | |
1458 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
1459 | { }; | |
1460 | ||
1461 | ||
1462 | // type property queries. | |
1463 | ||
1464 | /// alignment_of | |
1465 | template<typename _Tp> | |
1466 | struct alignment_of | |
1467 | : public integral_constant<std::size_t, __alignof__(_Tp)> { }; | |
1468 | ||
1469 | /// rank | |
1470 | template<typename> | |
1471 | struct rank | |
1472 | : public integral_constant<std::size_t, 0> { }; | |
1473 | ||
1474 | template<typename _Tp, std::size_t _Size> | |
1475 | struct rank<_Tp[_Size]> | |
1476 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1477 | ||
1478 | template<typename _Tp> | |
1479 | struct rank<_Tp[]> | |
1480 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1481 | ||
1482 | /// extent | |
1483 | template<typename, unsigned _Uint> | |
1484 | struct extent | |
1485 | : public integral_constant<std::size_t, 0> { }; | |
1486 | ||
1487 | template<typename _Tp, unsigned _Uint, std::size_t _Size> | |
1488 | struct extent<_Tp[_Size], _Uint> | |
1489 | : public integral_constant<std::size_t, | |
1490 | _Uint == 0 ? _Size : extent<_Tp, | |
1491 | _Uint - 1>::value> | |
1492 | { }; | |
1493 | ||
1494 | template<typename _Tp, unsigned _Uint> | |
1495 | struct extent<_Tp[], _Uint> | |
1496 | : public integral_constant<std::size_t, | |
1497 | _Uint == 0 ? 0 : extent<_Tp, | |
1498 | _Uint - 1>::value> | |
1499 | { }; | |
1500 | ||
1501 | ||
1502 | // Type relations. | |
1503 | ||
1504 | /// is_same | |
1505 | template<typename, typename> | |
1506 | struct is_same | |
1507 | : public false_type { }; | |
1508 | ||
1509 | template<typename _Tp> | |
1510 | struct is_same<_Tp, _Tp> | |
1511 | : public true_type { }; | |
1512 | ||
1513 | /// is_base_of | |
1514 | template<typename _Base, typename _Derived> | |
1515 | struct is_base_of | |
1516 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1517 | { }; | |
1518 | ||
1519 | template<typename _From, typename _To, | |
1520 | bool = __or_<is_void<_From>, is_function<_To>, | |
1521 | is_array<_To>>::value> | |
1522 | struct __is_convertible_helper | |
1523 | { typedef typename is_void<_To>::type type; }; | |
1524 | ||
1525 | template<typename _From, typename _To> | |
1526 | class __is_convertible_helper<_From, _To, false> | |
1527 | { | |
1528 | template<typename _To1> | |
1529 | static void __test_aux(_To1); | |
1530 | ||
1531 | template<typename _From1, typename _To1, | |
1532 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1533 | static true_type | |
1534 | __test(int); | |
1535 | ||
1536 | template<typename, typename> | |
1537 | static false_type | |
1538 | __test(...); | |
1539 | ||
1540 | public: | |
1541 | typedef decltype(__test<_From, _To>(0)) type; | |
1542 | }; | |
1543 | ||
1544 | ||
1545 | /// is_convertible | |
1546 | template<typename _From, typename _To> | |
1547 | struct is_convertible | |
1548 | : public __is_convertible_helper<_From, _To>::type | |
1549 | { }; | |
1550 | ||
1551 | ||
1552 | // Const-volatile modifications. | |
1553 | ||
1554 | /// remove_const | |
1555 | template<typename _Tp> | |
1556 | struct remove_const | |
1557 | { typedef _Tp type; }; | |
1558 | ||
1559 | template<typename _Tp> | |
1560 | struct remove_const<_Tp const> | |
1561 | { typedef _Tp type; }; | |
1562 | ||
1563 | /// remove_volatile | |
1564 | template<typename _Tp> | |
1565 | struct remove_volatile | |
1566 | { typedef _Tp type; }; | |
1567 | ||
1568 | template<typename _Tp> | |
1569 | struct remove_volatile<_Tp volatile> | |
1570 | { typedef _Tp type; }; | |
1571 | ||
1572 | /// remove_cv | |
1573 | template<typename _Tp> | |
1574 | struct remove_cv | |
1575 | { | |
1576 | typedef typename | |
1577 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1578 | }; | |
1579 | ||
1580 | /// add_const | |
1581 | template<typename _Tp> | |
1582 | struct add_const | |
1583 | { typedef _Tp const type; }; | |
1584 | ||
1585 | /// add_volatile | |
1586 | template<typename _Tp> | |
1587 | struct add_volatile | |
1588 | { typedef _Tp volatile type; }; | |
1589 | ||
1590 | /// add_cv | |
1591 | template<typename _Tp> | |
1592 | struct add_cv | |
1593 | { | |
1594 | typedef typename | |
1595 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1596 | }; | |
1597 | ||
1598 | #if __cplusplus > 201103L | |
1599 | ||
1600 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1601 | ||
1602 | /// Alias template for remove_const | |
1603 | template<typename _Tp> | |
1604 | using remove_const_t = typename remove_const<_Tp>::type; | |
1605 | ||
1606 | /// Alias template for remove_volatile | |
1607 | template<typename _Tp> | |
1608 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1609 | ||
1610 | /// Alias template for remove_cv | |
1611 | template<typename _Tp> | |
1612 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1613 | ||
1614 | /// Alias template for add_const | |
1615 | template<typename _Tp> | |
1616 | using add_const_t = typename add_const<_Tp>::type; | |
1617 | ||
1618 | /// Alias template for add_volatile | |
1619 | template<typename _Tp> | |
1620 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1621 | ||
1622 | /// Alias template for add_cv | |
1623 | template<typename _Tp> | |
1624 | using add_cv_t = typename add_cv<_Tp>::type; | |
1625 | #endif | |
1626 | ||
1627 | // Reference transformations. | |
1628 | ||
1629 | /// remove_reference | |
1630 | template<typename _Tp> | |
1631 | struct remove_reference | |
1632 | { typedef _Tp type; }; | |
1633 | ||
1634 | template<typename _Tp> | |
1635 | struct remove_reference<_Tp&> | |
1636 | { typedef _Tp type; }; | |
1637 | ||
1638 | template<typename _Tp> | |
1639 | struct remove_reference<_Tp&&> | |
1640 | { typedef _Tp type; }; | |
1641 | ||
1642 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1643 | struct __add_lvalue_reference_helper | |
1644 | { typedef _Tp type; }; | |
1645 | ||
1646 | template<typename _Tp> | |
1647 | struct __add_lvalue_reference_helper<_Tp, true> | |
1648 | { typedef _Tp& type; }; | |
1649 | ||
1650 | /// add_lvalue_reference | |
1651 | template<typename _Tp> | |
1652 | struct add_lvalue_reference | |
1653 | : public __add_lvalue_reference_helper<_Tp> | |
1654 | { }; | |
1655 | ||
1656 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1657 | struct __add_rvalue_reference_helper | |
1658 | { typedef _Tp type; }; | |
1659 | ||
1660 | template<typename _Tp> | |
1661 | struct __add_rvalue_reference_helper<_Tp, true> | |
1662 | { typedef _Tp&& type; }; | |
1663 | ||
1664 | /// add_rvalue_reference | |
1665 | template<typename _Tp> | |
1666 | struct add_rvalue_reference | |
1667 | : public __add_rvalue_reference_helper<_Tp> | |
1668 | { }; | |
1669 | ||
1670 | #if __cplusplus > 201103L | |
1671 | /// Alias template for remove_reference | |
1672 | template<typename _Tp> | |
1673 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1674 | ||
1675 | /// Alias template for add_lvalue_reference | |
1676 | template<typename _Tp> | |
1677 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1678 | ||
1679 | /// Alias template for add_rvalue_reference | |
1680 | template<typename _Tp> | |
1681 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1682 | #endif | |
1683 | ||
1684 | // Sign modifications. | |
1685 | ||
1686 | // Utility for constructing identically cv-qualified types. | |
1687 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1688 | struct __cv_selector; | |
1689 | ||
1690 | template<typename _Unqualified> | |
1691 | struct __cv_selector<_Unqualified, false, false> | |
1692 | { typedef _Unqualified __type; }; | |
1693 | ||
1694 | template<typename _Unqualified> | |
1695 | struct __cv_selector<_Unqualified, false, true> | |
1696 | { typedef volatile _Unqualified __type; }; | |
1697 | ||
1698 | template<typename _Unqualified> | |
1699 | struct __cv_selector<_Unqualified, true, false> | |
1700 | { typedef const _Unqualified __type; }; | |
1701 | ||
1702 | template<typename _Unqualified> | |
1703 | struct __cv_selector<_Unqualified, true, true> | |
1704 | { typedef const volatile _Unqualified __type; }; | |
1705 | ||
1706 | template<typename _Qualified, typename _Unqualified, | |
1707 | bool _IsConst = is_const<_Qualified>::value, | |
1708 | bool _IsVol = is_volatile<_Qualified>::value> | |
1709 | class __match_cv_qualifiers | |
1710 | { | |
1711 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; | |
1712 | ||
1713 | public: | |
1714 | typedef typename __match::__type __type; | |
1715 | }; | |
1716 | ||
1717 | // Utility for finding the unsigned versions of signed integral types. | |
1718 | template<typename _Tp> | |
1719 | struct __make_unsigned | |
1720 | { typedef _Tp __type; }; | |
1721 | ||
1722 | template<> | |
1723 | struct __make_unsigned<char> | |
1724 | { typedef unsigned char __type; }; | |
1725 | ||
1726 | template<> | |
1727 | struct __make_unsigned<signed char> | |
1728 | { typedef unsigned char __type; }; | |
1729 | ||
1730 | template<> | |
1731 | struct __make_unsigned<short> | |
1732 | { typedef unsigned short __type; }; | |
1733 | ||
1734 | template<> | |
1735 | struct __make_unsigned<int> | |
1736 | { typedef unsigned int __type; }; | |
1737 | ||
1738 | template<> | |
1739 | struct __make_unsigned<long> | |
1740 | { typedef unsigned long __type; }; | |
1741 | ||
1742 | template<> | |
1743 | struct __make_unsigned<long long> | |
1744 | { typedef unsigned long long __type; }; | |
1745 | ||
1746 | #if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__) | |
1747 | template<> | |
1748 | struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__> | |
1749 | { }; | |
1750 | #endif | |
1751 | ||
1752 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
1753 | template<> | |
1754 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1755 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1756 | #endif | |
1757 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1758 | template<> | |
1759 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1760 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1761 | #endif | |
1762 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1763 | template<> | |
1764 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> | |
1765 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1766 | #endif | |
1767 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1768 | template<> | |
1769 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1770 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
1771 | #endif | |
1772 | ||
1773 | // Select between integral and enum: not possible to be both. | |
1774 | template<typename _Tp, | |
1775 | bool _IsInt = is_integral<_Tp>::value, | |
1776 | bool _IsEnum = is_enum<_Tp>::value> | |
1777 | class __make_unsigned_selector; | |
1778 | ||
1779 | template<typename _Tp> | |
1780 | class __make_unsigned_selector<_Tp, true, false> | |
1781 | { | |
1782 | typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; | |
1783 | typedef typename __unsignedt::__type __unsigned_type; | |
1784 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1785 | ||
1786 | public: | |
1787 | typedef typename __cv_unsigned::__type __type; | |
1788 | }; | |
1789 | ||
1790 | template<typename _Tp> | |
1791 | class __make_unsigned_selector<_Tp, false, true> | |
1792 | { | |
1793 | // With -fshort-enums, an enum may be as small as a char. | |
1794 | typedef unsigned char __smallest; | |
1795 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); | |
1796 | static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); | |
1797 | static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); | |
1798 | static const bool __b3 = sizeof(_Tp) <= sizeof(unsigned long); | |
1799 | typedef conditional<__b3, unsigned long, unsigned long long> __cond3; | |
1800 | typedef typename __cond3::type __cond3_type; | |
1801 | typedef conditional<__b2, unsigned int, __cond3_type> __cond2; | |
1802 | typedef typename __cond2::type __cond2_type; | |
1803 | typedef conditional<__b1, unsigned short, __cond2_type> __cond1; | |
1804 | typedef typename __cond1::type __cond1_type; | |
1805 | ||
1806 | typedef typename conditional<__b0, __smallest, __cond1_type>::type | |
1807 | __unsigned_type; | |
1808 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1809 | ||
1810 | public: | |
1811 | typedef typename __cv_unsigned::__type __type; | |
1812 | }; | |
1813 | ||
1814 | // Given an integral/enum type, return the corresponding unsigned | |
1815 | // integer type. | |
1816 | // Primary template. | |
1817 | /// make_unsigned | |
1818 | template<typename _Tp> | |
1819 | struct make_unsigned | |
1820 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; | |
1821 | ||
1822 | // Integral, but don't define. | |
1823 | template<> | |
1824 | struct make_unsigned<bool>; | |
1825 | ||
1826 | ||
1827 | // Utility for finding the signed versions of unsigned integral types. | |
1828 | template<typename _Tp> | |
1829 | struct __make_signed | |
1830 | { typedef _Tp __type; }; | |
1831 | ||
1832 | template<> | |
1833 | struct __make_signed<char> | |
1834 | { typedef signed char __type; }; | |
1835 | ||
1836 | template<> | |
1837 | struct __make_signed<unsigned char> | |
1838 | { typedef signed char __type; }; | |
1839 | ||
1840 | template<> | |
1841 | struct __make_signed<unsigned short> | |
1842 | { typedef signed short __type; }; | |
1843 | ||
1844 | template<> | |
1845 | struct __make_signed<unsigned int> | |
1846 | { typedef signed int __type; }; | |
1847 | ||
1848 | template<> | |
1849 | struct __make_signed<unsigned long> | |
1850 | { typedef signed long __type; }; | |
1851 | ||
1852 | template<> | |
1853 | struct __make_signed<unsigned long long> | |
1854 | { typedef signed long long __type; }; | |
1855 | ||
1856 | #if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__) | |
1857 | template<> | |
1858 | struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__> | |
1859 | { }; | |
1860 | #endif | |
1861 | ||
1862 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
1863 | template<> | |
1864 | struct __make_signed<char16_t> : __make_signed<uint_least16_t> | |
1865 | { }; | |
1866 | template<> | |
1867 | struct __make_signed<char32_t> : __make_signed<uint_least32_t> | |
1868 | { }; | |
1869 | #endif | |
1870 | ||
1871 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
1872 | template<> | |
1873 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1874 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1875 | #endif | |
1876 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1877 | template<> | |
1878 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1879 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1880 | #endif | |
1881 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1882 | template<> | |
1883 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1884 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1885 | #endif | |
1886 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1887 | template<> | |
1888 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> | |
1889 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
1890 | #endif | |
1891 | ||
1892 | // Select between integral and enum: not possible to be both. | |
1893 | template<typename _Tp, | |
1894 | bool _IsInt = is_integral<_Tp>::value, | |
1895 | bool _IsEnum = is_enum<_Tp>::value> | |
1896 | class __make_signed_selector; | |
1897 | ||
1898 | template<typename _Tp> | |
1899 | class __make_signed_selector<_Tp, true, false> | |
1900 | { | |
1901 | typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; | |
1902 | typedef typename __signedt::__type __signed_type; | |
1903 | typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; | |
1904 | ||
1905 | public: | |
1906 | typedef typename __cv_signed::__type __type; | |
1907 | }; | |
1908 | ||
1909 | template<typename _Tp> | |
1910 | class __make_signed_selector<_Tp, false, true> | |
1911 | { | |
1912 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; | |
1913 | ||
1914 | public: | |
1915 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; | |
1916 | }; | |
1917 | ||
1918 | // Given an integral/enum type, return the corresponding signed | |
1919 | // integer type. | |
1920 | // Primary template. | |
1921 | /// make_signed | |
1922 | template<typename _Tp> | |
1923 | struct make_signed | |
1924 | { typedef typename __make_signed_selector<_Tp>::__type type; }; | |
1925 | ||
1926 | // Integral, but don't define. | |
1927 | template<> | |
1928 | struct make_signed<bool>; | |
1929 | ||
1930 | #if __cplusplus > 201103L | |
1931 | /// Alias template for make_signed | |
1932 | template<typename _Tp> | |
1933 | using make_signed_t = typename make_signed<_Tp>::type; | |
1934 | ||
1935 | /// Alias template for make_unsigned | |
1936 | template<typename _Tp> | |
1937 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1938 | #endif | |
1939 | ||
1940 | // Array modifications. | |
1941 | ||
1942 | /// remove_extent | |
1943 | template<typename _Tp> | |
1944 | struct remove_extent | |
1945 | { typedef _Tp type; }; | |
1946 | ||
1947 | template<typename _Tp, std::size_t _Size> | |
1948 | struct remove_extent<_Tp[_Size]> | |
1949 | { typedef _Tp type; }; | |
1950 | ||
1951 | template<typename _Tp> | |
1952 | struct remove_extent<_Tp[]> | |
1953 | { typedef _Tp type; }; | |
1954 | ||
1955 | /// remove_all_extents | |
1956 | template<typename _Tp> | |
1957 | struct remove_all_extents | |
1958 | { typedef _Tp type; }; | |
1959 | ||
1960 | template<typename _Tp, std::size_t _Size> | |
1961 | struct remove_all_extents<_Tp[_Size]> | |
1962 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1963 | ||
1964 | template<typename _Tp> | |
1965 | struct remove_all_extents<_Tp[]> | |
1966 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1967 | ||
1968 | #if __cplusplus > 201103L | |
1969 | /// Alias template for remove_extent | |
1970 | template<typename _Tp> | |
1971 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1972 | ||
1973 | /// Alias template for remove_all_extents | |
1974 | template<typename _Tp> | |
1975 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1976 | #endif | |
1977 | ||
1978 | // Pointer modifications. | |
1979 | ||
1980 | template<typename _Tp, typename> | |
1981 | struct __remove_pointer_helper | |
1982 | { typedef _Tp type; }; | |
1983 | ||
1984 | template<typename _Tp, typename _Up> | |
1985 | struct __remove_pointer_helper<_Tp, _Up*> | |
1986 | { typedef _Up type; }; | |
1987 | ||
1988 | /// remove_pointer | |
1989 | template<typename _Tp> | |
1990 | struct remove_pointer | |
1991 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1992 | { }; | |
1993 | ||
1994 | /// add_pointer | |
1995 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, | |
1996 | is_void<_Tp>>::value> | |
1997 | struct __add_pointer_helper | |
1998 | { typedef _Tp type; }; | |
1999 | ||
2000 | template<typename _Tp> | |
2001 | struct __add_pointer_helper<_Tp, true> | |
2002 | { typedef typename remove_reference<_Tp>::type* type; }; | |
2003 | ||
2004 | template<typename _Tp> | |
2005 | struct add_pointer | |
2006 | : public __add_pointer_helper<_Tp> | |
2007 | { }; | |
2008 | ||
2009 | #if __cplusplus > 201103L | |
2010 | /// Alias template for remove_pointer | |
2011 | template<typename _Tp> | |
2012 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
2013 | ||
2014 | /// Alias template for add_pointer | |
2015 | template<typename _Tp> | |
2016 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
2017 | #endif | |
2018 | ||
2019 | template<std::size_t _Len> | |
2020 | struct __aligned_storage_msa | |
2021 | { | |
2022 | union __type | |
2023 | { | |
2024 | unsigned char __data[_Len]; | |
2025 | struct __attribute__((__aligned__)) { } __align; | |
2026 | }; | |
2027 | }; | |
2028 | ||
2029 | /** | |
2030 | * @brief Alignment type. | |
2031 | * | |
2032 | * The value of _Align is a default-alignment which shall be the | |
2033 | * most stringent alignment requirement for any C++ object type | |
2034 | * whose size is no greater than _Len (3.9). The member typedef | |
2035 | * type shall be a POD type suitable for use as uninitialized | |
2036 | * storage for any object whose size is at most _Len and whose | |
2037 | * alignment is a divisor of _Align. | |
2038 | */ | |
2039 | template<std::size_t _Len, std::size_t _Align = | |
2040 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2041 | struct aligned_storage | |
2042 | { | |
2043 | union type | |
2044 | { | |
2045 | unsigned char __data[_Len]; | |
2046 | struct __attribute__((__aligned__((_Align)))) { } __align; | |
2047 | }; | |
2048 | }; | |
2049 | ||
2050 | template <typename... _Types> | |
2051 | struct __strictest_alignment | |
2052 | { | |
2053 | static const size_t _S_alignment = 0; | |
2054 | static const size_t _S_size = 0; | |
2055 | }; | |
2056 | ||
2057 | template <typename _Tp, typename... _Types> | |
2058 | struct __strictest_alignment<_Tp, _Types...> | |
2059 | { | |
2060 | static const size_t _S_alignment = | |
2061 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2062 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2063 | static const size_t _S_size = | |
2064 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2065 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2066 | }; | |
2067 | ||
2068 | /** | |
2069 | * @brief Provide aligned storage for types. | |
2070 | * | |
2071 | * [meta.trans.other] | |
2072 | * | |
2073 | * Provides aligned storage for any of the provided types of at | |
2074 | * least size _Len. | |
2075 | * | |
2076 | * @see aligned_storage | |
2077 | */ | |
2078 | template <size_t _Len, typename... _Types> | |
2079 | struct aligned_union | |
2080 | { | |
2081 | private: | |
2082 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2083 | ||
2084 | using __strictest = __strictest_alignment<_Types...>; | |
2085 | static const size_t _S_len = _Len > __strictest::_S_size | |
2086 | ? _Len : __strictest::_S_size; | |
2087 | public: | |
2088 | /// The value of the strictest alignment of _Types. | |
2089 | static const size_t alignment_value = __strictest::_S_alignment; | |
2090 | /// The storage. | |
2091 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2092 | }; | |
2093 | ||
2094 | template <size_t _Len, typename... _Types> | |
2095 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
2096 | ||
2097 | // Decay trait for arrays and functions, used for perfect forwarding | |
2098 | // in make_pair, make_tuple, etc. | |
2099 | template<typename _Up, | |
2100 | bool _IsArray = is_array<_Up>::value, | |
2101 | bool _IsFunction = is_function<_Up>::value> | |
2102 | struct __decay_selector; | |
2103 | ||
2104 | // NB: DR 705. | |
2105 | template<typename _Up> | |
2106 | struct __decay_selector<_Up, false, false> | |
2107 | { typedef typename remove_cv<_Up>::type __type; }; | |
2108 | ||
2109 | template<typename _Up> | |
2110 | struct __decay_selector<_Up, true, false> | |
2111 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2112 | ||
2113 | template<typename _Up> | |
2114 | struct __decay_selector<_Up, false, true> | |
2115 | { typedef typename add_pointer<_Up>::type __type; }; | |
2116 | ||
2117 | /// decay | |
2118 | template<typename _Tp> | |
2119 | class decay | |
2120 | { | |
2121 | typedef typename remove_reference<_Tp>::type __remove_type; | |
2122 | ||
2123 | public: | |
2124 | typedef typename __decay_selector<__remove_type>::__type type; | |
2125 | }; | |
2126 | ||
2127 | template<typename _Tp> | |
2128 | class reference_wrapper; | |
2129 | ||
2130 | // Helper which adds a reference to a type when given a reference_wrapper | |
2131 | template<typename _Tp> | |
2132 | struct __strip_reference_wrapper | |
2133 | { | |
2134 | typedef _Tp __type; | |
2135 | }; | |
2136 | ||
2137 | template<typename _Tp> | |
2138 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2139 | { | |
2140 | typedef _Tp& __type; | |
2141 | }; | |
2142 | ||
2143 | template<typename _Tp> | |
2144 | struct __decay_and_strip | |
2145 | { | |
2146 | typedef typename __strip_reference_wrapper< | |
2147 | typename decay<_Tp>::type>::__type __type; | |
2148 | }; | |
2149 | ||
2150 | ||
2151 | // Primary template. | |
2152 | /// Define a member typedef @c type only if a boolean constant is true. | |
2153 | template<bool, typename _Tp = void> | |
2154 | struct enable_if | |
2155 | { }; | |
2156 | ||
2157 | // Partial specialization for true. | |
2158 | template<typename _Tp> | |
2159 | struct enable_if<true, _Tp> | |
2160 | { typedef _Tp type; }; | |
2161 | ||
2162 | template<typename... _Cond> | |
2163 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
2164 | ||
2165 | // Primary template. | |
2166 | /// Define a member typedef @c type to one of two argument types. | |
2167 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2168 | struct conditional | |
2169 | { typedef _Iftrue type; }; | |
2170 | ||
2171 | // Partial specialization for false. | |
2172 | template<typename _Iftrue, typename _Iffalse> | |
2173 | struct conditional<false, _Iftrue, _Iffalse> | |
2174 | { typedef _Iffalse type; }; | |
2175 | ||
2176 | /// common_type | |
2177 | template<typename... _Tp> | |
2178 | struct common_type; | |
2179 | ||
2180 | // Sfinae-friendly common_type implementation: | |
2181 | ||
2182 | struct __do_common_type_impl | |
2183 | { | |
2184 | template<typename _Tp, typename _Up> | |
2185 | static __success_type<typename decay<decltype | |
2186 | (true ? std::declval<_Tp>() | |
2187 | : std::declval<_Up>())>::type> _S_test(int); | |
2188 | ||
2189 | template<typename, typename> | |
2190 | static __failure_type _S_test(...); | |
2191 | }; | |
2192 | ||
2193 | template<typename _Tp, typename _Up> | |
2194 | struct __common_type_impl | |
2195 | : private __do_common_type_impl | |
2196 | { | |
2197 | typedef decltype(_S_test<_Tp, _Up>(0)) type; | |
2198 | }; | |
2199 | ||
2200 | struct __do_member_type_wrapper | |
2201 | { | |
2202 | template<typename _Tp> | |
2203 | static __success_type<typename _Tp::type> _S_test(int); | |
2204 | ||
2205 | template<typename> | |
2206 | static __failure_type _S_test(...); | |
2207 | }; | |
2208 | ||
2209 | template<typename _Tp> | |
2210 | struct __member_type_wrapper | |
2211 | : private __do_member_type_wrapper | |
2212 | { | |
2213 | typedef decltype(_S_test<_Tp>(0)) type; | |
2214 | }; | |
2215 | ||
2216 | template<typename _CTp, typename... _Args> | |
2217 | struct __expanded_common_type_wrapper | |
2218 | { | |
2219 | typedef common_type<typename _CTp::type, _Args...> type; | |
2220 | }; | |
2221 | ||
2222 | template<typename... _Args> | |
2223 | struct __expanded_common_type_wrapper<__failure_type, _Args...> | |
2224 | { typedef __failure_type type; }; | |
2225 | ||
2226 | template<typename _Tp> | |
2227 | struct common_type<_Tp> | |
2228 | { typedef typename decay<_Tp>::type type; }; | |
2229 | ||
2230 | template<typename _Tp, typename _Up> | |
2231 | struct common_type<_Tp, _Up> | |
2232 | : public __common_type_impl<_Tp, _Up>::type | |
2233 | { }; | |
2234 | ||
2235 | template<typename _Tp, typename _Up, typename... _Vp> | |
2236 | struct common_type<_Tp, _Up, _Vp...> | |
2237 | : public __expanded_common_type_wrapper<typename __member_type_wrapper< | |
2238 | common_type<_Tp, _Up>>::type, _Vp...>::type | |
2239 | { }; | |
2240 | ||
2241 | /// The underlying type of an enum. | |
2242 | template<typename _Tp> | |
2243 | struct underlying_type | |
2244 | { | |
2245 | typedef __underlying_type(_Tp) type; | |
2246 | }; | |
2247 | ||
2248 | template<typename _Tp> | |
2249 | struct __declval_protector | |
2250 | { | |
2251 | static const bool __stop = false; | |
2252 | static typename add_rvalue_reference<_Tp>::type __delegate(); | |
2253 | }; | |
2254 | ||
2255 | template<typename _Tp> | |
2256 | inline typename add_rvalue_reference<_Tp>::type | |
2257 | declval() noexcept | |
2258 | { | |
2259 | static_assert(__declval_protector<_Tp>::__stop, | |
2260 | "declval() must not be used!"); | |
2261 | return __declval_protector<_Tp>::__delegate(); | |
2262 | } | |
2263 | ||
2264 | /// result_of | |
2265 | template<typename _Signature> | |
2266 | class result_of; | |
2267 | ||
2268 | // Sfinae-friendly result_of implementation: | |
2269 | ||
2270 | #define __cpp_lib_result_of_sfinae 201210 | |
2271 | ||
2272 | struct __invoke_memfun_ref { }; | |
2273 | struct __invoke_memfun_deref { }; | |
2274 | struct __invoke_memobj_ref { }; | |
2275 | struct __invoke_memobj_deref { }; | |
2276 | struct __invoke_other { }; | |
2277 | ||
2278 | // Associate a tag type with a specialization of __success_type. | |
2279 | template<typename _Tp, typename _Tag> | |
2280 | struct __result_of_success : __success_type<_Tp> | |
2281 | { using __invoke_type = _Tag; }; | |
2282 | ||
2283 | // [func.require] paragraph 1 bullet 1: | |
2284 | struct __result_of_memfun_ref_impl | |
2285 | { | |
2286 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2287 | static __result_of_success<decltype( | |
2288 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) | |
2289 | ), __invoke_memfun_ref> _S_test(int); | |
2290 | ||
2291 | template<typename...> | |
2292 | static __failure_type _S_test(...); | |
2293 | }; | |
2294 | ||
2295 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2296 | struct __result_of_memfun_ref | |
2297 | : private __result_of_memfun_ref_impl | |
2298 | { | |
2299 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2300 | }; | |
2301 | ||
2302 | // [func.require] paragraph 1 bullet 2: | |
2303 | struct __result_of_memfun_deref_impl | |
2304 | { | |
2305 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2306 | static __result_of_success<decltype( | |
2307 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) | |
2308 | ), __invoke_memfun_deref> _S_test(int); | |
2309 | ||
2310 | template<typename...> | |
2311 | static __failure_type _S_test(...); | |
2312 | }; | |
2313 | ||
2314 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2315 | struct __result_of_memfun_deref | |
2316 | : private __result_of_memfun_deref_impl | |
2317 | { | |
2318 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2319 | }; | |
2320 | ||
2321 | // [func.require] paragraph 1 bullet 3: | |
2322 | struct __result_of_memobj_ref_impl | |
2323 | { | |
2324 | template<typename _Fp, typename _Tp1> | |
2325 | static __result_of_success<decltype( | |
2326 | std::declval<_Tp1>().*std::declval<_Fp>() | |
2327 | ), __invoke_memobj_ref> _S_test(int); | |
2328 | ||
2329 | template<typename, typename> | |
2330 | static __failure_type _S_test(...); | |
2331 | }; | |
2332 | ||
2333 | template<typename _MemPtr, typename _Arg> | |
2334 | struct __result_of_memobj_ref | |
2335 | : private __result_of_memobj_ref_impl | |
2336 | { | |
2337 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2338 | }; | |
2339 | ||
2340 | // [func.require] paragraph 1 bullet 4: | |
2341 | struct __result_of_memobj_deref_impl | |
2342 | { | |
2343 | template<typename _Fp, typename _Tp1> | |
2344 | static __result_of_success<decltype( | |
2345 | (*std::declval<_Tp1>()).*std::declval<_Fp>() | |
2346 | ), __invoke_memobj_deref> _S_test(int); | |
2347 | ||
2348 | template<typename, typename> | |
2349 | static __failure_type _S_test(...); | |
2350 | }; | |
2351 | ||
2352 | template<typename _MemPtr, typename _Arg> | |
2353 | struct __result_of_memobj_deref | |
2354 | : private __result_of_memobj_deref_impl | |
2355 | { | |
2356 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2357 | }; | |
2358 | ||
2359 | template<typename _MemPtr, typename _Arg> | |
2360 | struct __result_of_memobj; | |
2361 | ||
2362 | template<typename _Res, typename _Class, typename _Arg> | |
2363 | struct __result_of_memobj<_Res _Class::*, _Arg> | |
2364 | { | |
2365 | typedef typename remove_cv<typename remove_reference< | |
2366 | _Arg>::type>::type _Argval; | |
2367 | typedef _Res _Class::* _MemPtr; | |
2368 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2369 | is_base_of<_Class, _Argval>>::value, | |
2370 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2371 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2372 | >::type::type type; | |
2373 | }; | |
2374 | ||
2375 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2376 | struct __result_of_memfun; | |
2377 | ||
2378 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2379 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> | |
2380 | { | |
2381 | typedef typename remove_cv<typename remove_reference< | |
2382 | _Arg>::type>::type _Argval; | |
2383 | typedef _Res _Class::* _MemPtr; | |
2384 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2385 | is_base_of<_Class, _Argval>>::value, | |
2386 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, | |
2387 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2388 | >::type::type type; | |
2389 | }; | |
2390 | ||
2391 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
2392 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper | |
2393 | // as the object expression | |
2394 | ||
2395 | template<typename _Res, typename _Class, typename _Arg> | |
2396 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>> | |
2397 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
2398 | { }; | |
2399 | ||
2400 | template<typename _Res, typename _Class, typename _Arg> | |
2401 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>&> | |
2402 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
2403 | { }; | |
2404 | ||
2405 | template<typename _Res, typename _Class, typename _Arg> | |
2406 | struct __result_of_memobj<_Res _Class::*, const reference_wrapper<_Arg>&> | |
2407 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
2408 | { }; | |
2409 | ||
2410 | template<typename _Res, typename _Class, typename _Arg> | |
2411 | struct __result_of_memobj<_Res _Class::*, reference_wrapper<_Arg>&&> | |
2412 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
2413 | { }; | |
2414 | ||
2415 | template<typename _Res, typename _Class, typename _Arg> | |
2416 | struct __result_of_memobj<_Res _Class::*, const reference_wrapper<_Arg>&&> | |
2417 | : __result_of_memobj_ref<_Res _Class::*, _Arg&> | |
2418 | { }; | |
2419 | ||
2420 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2421 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>, _Args...> | |
2422 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
2423 | { }; | |
2424 | ||
2425 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2426 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>&, | |
2427 | _Args...> | |
2428 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
2429 | { }; | |
2430 | ||
2431 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2432 | struct __result_of_memfun<_Res _Class::*, const reference_wrapper<_Arg>&, | |
2433 | _Args...> | |
2434 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
2435 | { }; | |
2436 | ||
2437 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2438 | struct __result_of_memfun<_Res _Class::*, reference_wrapper<_Arg>&&, | |
2439 | _Args...> | |
2440 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
2441 | { }; | |
2442 | ||
2443 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
2444 | struct __result_of_memfun<_Res _Class::*, const reference_wrapper<_Arg>&&, | |
2445 | _Args...> | |
2446 | : __result_of_memfun_ref<_Res _Class::*, _Arg&, _Args...> | |
2447 | { }; | |
2448 | ||
2449 | template<bool, bool, typename _Functor, typename... _ArgTypes> | |
2450 | struct __result_of_impl | |
2451 | { | |
2452 | typedef __failure_type type; | |
2453 | }; | |
2454 | ||
2455 | template<typename _MemPtr, typename _Arg> | |
2456 | struct __result_of_impl<true, false, _MemPtr, _Arg> | |
2457 | : public __result_of_memobj<typename decay<_MemPtr>::type, _Arg> | |
2458 | { }; | |
2459 | ||
2460 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2461 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
2462 | : public __result_of_memfun<typename decay<_MemPtr>::type, _Arg, _Args...> | |
2463 | { }; | |
2464 | ||
2465 | // [func.require] paragraph 1 bullet 5: | |
2466 | struct __result_of_other_impl | |
2467 | { | |
2468 | template<typename _Fn, typename... _Args> | |
2469 | static __result_of_success<decltype( | |
2470 | std::declval<_Fn>()(std::declval<_Args>()...) | |
2471 | ), __invoke_other> _S_test(int); | |
2472 | ||
2473 | template<typename...> | |
2474 | static __failure_type _S_test(...); | |
2475 | }; | |
2476 | ||
2477 | template<typename _Functor, typename... _ArgTypes> | |
2478 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> | |
2479 | : private __result_of_other_impl | |
2480 | { | |
2481 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; | |
2482 | }; | |
2483 | ||
2484 | template<typename _Functor, typename... _ArgTypes> | |
2485 | struct result_of<_Functor(_ArgTypes...)> | |
2486 | : public __result_of_impl< | |
2487 | is_member_object_pointer< | |
2488 | typename remove_reference<_Functor>::type | |
2489 | >::value, | |
2490 | is_member_function_pointer< | |
2491 | typename remove_reference<_Functor>::type | |
2492 | >::value, | |
2493 | _Functor, _ArgTypes... | |
2494 | >::type | |
2495 | { }; | |
2496 | ||
2497 | #if __cplusplus > 201103L | |
2498 | /// Alias template for aligned_storage | |
2499 | template<size_t _Len, size_t _Align = | |
2500 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2501 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2502 | ||
2503 | template <size_t _Len, typename... _Types> | |
2504 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2505 | ||
2506 | /// Alias template for decay | |
2507 | template<typename _Tp> | |
2508 | using decay_t = typename decay<_Tp>::type; | |
2509 | ||
2510 | /// Alias template for enable_if | |
2511 | template<bool _Cond, typename _Tp = void> | |
2512 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2513 | ||
2514 | /// Alias template for conditional | |
2515 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2516 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2517 | ||
2518 | /// Alias template for common_type | |
2519 | template<typename... _Tp> | |
2520 | using common_type_t = typename common_type<_Tp...>::type; | |
2521 | ||
2522 | /// Alias template for underlying_type | |
2523 | template<typename _Tp> | |
2524 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2525 | ||
2526 | /// Alias template for result_of | |
2527 | template<typename _Tp> | |
2528 | using result_of_t = typename result_of<_Tp>::type; | |
2529 | #endif | |
2530 | ||
2531 | template<typename...> using __void_t = void; | |
2532 | ||
2533 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 | |
2534 | #define __cpp_lib_void_t 201411 | |
2535 | /// A metafunction that always yields void, used for detecting valid types. | |
2536 | template<typename...> using void_t = void; | |
2537 | #endif | |
2538 | ||
2539 | /// Implementation of the detection idiom (negative case). | |
2540 | template<typename _Default, typename _AlwaysVoid, | |
2541 | template<typename...> class _Op, typename... _Args> | |
2542 | struct __detector | |
2543 | { | |
2544 | using value_t = false_type; | |
2545 | using type = _Default; | |
2546 | }; | |
2547 | ||
2548 | /// Implementation of the detection idiom (positive case). | |
2549 | template<typename _Default, template<typename...> class _Op, | |
2550 | typename... _Args> | |
2551 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2552 | { | |
2553 | using value_t = true_type; | |
2554 | using type = _Op<_Args...>; | |
2555 | }; | |
2556 | ||
2557 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2558 | template<typename _Default, template<typename...> class _Op, | |
2559 | typename... _Args> | |
2560 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2561 | ||
2562 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2563 | template<typename _Default, template<typename...> class _Op, | |
2564 | typename... _Args> | |
2565 | using __detected_or_t | |
2566 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2567 | ||
2568 | // _Op<_Args...> if that is a valid type, otherwise _Default<_Args...>. | |
2569 | template<template<typename...> class _Default, | |
2570 | template<typename...> class _Op, typename... _Args> | |
2571 | using __detected_or_t_ = | |
2572 | __detected_or_t<_Default<_Args...>, _Op, _Args...>; | |
2573 | ||
2574 | /// @} group metaprogramming | |
2575 | ||
2576 | /** | |
2577 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2578 | * member type _NTYPE. | |
2579 | */ | |
2580 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ | |
2581 | template<typename _Tp, typename = __void_t<>> \ | |
2582 | struct __has_##_NTYPE \ | |
2583 | : false_type \ | |
2584 | { }; \ | |
2585 | template<typename _Tp> \ | |
2586 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2587 | : true_type \ | |
2588 | { }; | |
2589 | ||
2590 | template <typename _Tp> | |
2591 | struct __is_swappable; | |
2592 | ||
2593 | template <typename _Tp> | |
2594 | struct __is_nothrow_swappable; | |
2595 | ||
2596 | template<typename... _Elements> | |
2597 | class tuple; | |
2598 | ||
2599 | template<typename> | |
2600 | struct __is_tuple_like_impl : false_type | |
2601 | { }; | |
2602 | ||
2603 | template<typename... _Tps> | |
2604 | struct __is_tuple_like_impl<tuple<_Tps...>> : true_type | |
2605 | { }; | |
2606 | ||
2607 | // Internal type trait that allows us to sfinae-protect tuple_cat. | |
2608 | template<typename _Tp> | |
2609 | struct __is_tuple_like | |
2610 | : public __is_tuple_like_impl<typename remove_cv< | |
2611 | typename remove_reference<_Tp>::type>::type>::type | |
2612 | { }; | |
2613 | ||
2614 | template<typename _Tp> | |
2615 | inline | |
2616 | typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>, | |
2617 | is_move_constructible<_Tp>, | |
2618 | is_move_assignable<_Tp>>::value>::type | |
2619 | swap(_Tp&, _Tp&) | |
2620 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2621 | is_nothrow_move_assignable<_Tp>>::value); | |
2622 | ||
2623 | template<typename _Tp, size_t _Nm> | |
2624 | inline | |
2625 | typename enable_if<__is_swappable<_Tp>::value>::type | |
2626 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) | |
2627 | noexcept(__is_nothrow_swappable<_Tp>::value); | |
2628 | ||
2629 | namespace __swappable_details { | |
2630 | using std::swap; | |
2631 | ||
2632 | struct __do_is_swappable_impl | |
2633 | { | |
2634 | template<typename _Tp, typename | |
2635 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> | |
2636 | static true_type __test(int); | |
2637 | ||
2638 | template<typename> | |
2639 | static false_type __test(...); | |
2640 | }; | |
2641 | ||
2642 | struct __do_is_nothrow_swappable_impl | |
2643 | { | |
2644 | template<typename _Tp> | |
2645 | static __bool_constant< | |
2646 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) | |
2647 | > __test(int); | |
2648 | ||
2649 | template<typename> | |
2650 | static false_type __test(...); | |
2651 | }; | |
2652 | ||
2653 | } // namespace __swappable_details | |
2654 | ||
2655 | template<typename _Tp> | |
2656 | struct __is_swappable_impl | |
2657 | : public __swappable_details::__do_is_swappable_impl | |
2658 | { | |
2659 | typedef decltype(__test<_Tp>(0)) type; | |
2660 | }; | |
2661 | ||
2662 | template<typename _Tp> | |
2663 | struct __is_nothrow_swappable_impl | |
2664 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2665 | { | |
2666 | typedef decltype(__test<_Tp>(0)) type; | |
2667 | }; | |
2668 | ||
2669 | template<typename _Tp> | |
2670 | struct __is_swappable | |
2671 | : public __is_swappable_impl<_Tp>::type | |
2672 | { }; | |
2673 | ||
2674 | template<typename _Tp> | |
2675 | struct __is_nothrow_swappable | |
2676 | : public __is_nothrow_swappable_impl<_Tp>::type | |
2677 | { }; | |
2678 | ||
2679 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 | |
2680 | #define __cpp_lib_is_swappable 201603 | |
2681 | /// Metafunctions used for detecting swappable types: p0185r1 | |
2682 | ||
2683 | /// is_swappable | |
2684 | template<typename _Tp> | |
2685 | struct is_swappable | |
2686 | : public __is_swappable_impl<_Tp>::type | |
2687 | { }; | |
2688 | ||
2689 | /// is_nothrow_swappable | |
2690 | template<typename _Tp> | |
2691 | struct is_nothrow_swappable | |
2692 | : public __is_nothrow_swappable_impl<_Tp>::type | |
2693 | { }; | |
2694 | ||
2695 | #if __cplusplus >= 201402L | |
2696 | /// is_swappable_v | |
2697 | template<typename _Tp> | |
2698 | constexpr bool is_swappable_v = is_swappable<_Tp>::value; | |
2699 | ||
2700 | /// is_nothrow_swappable_v | |
2701 | template<typename _Tp> | |
2702 | constexpr bool is_nothrow_swappable_v = is_nothrow_swappable<_Tp>::value; | |
2703 | #endif // __cplusplus >= 201402L | |
2704 | ||
2705 | namespace __swappable_with_details { | |
2706 | using std::swap; | |
2707 | ||
2708 | struct __do_is_swappable_with_impl | |
2709 | { | |
2710 | template<typename _Tp, typename _Up, typename | |
2711 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), | |
2712 | typename | |
2713 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> | |
2714 | static true_type __test(int); | |
2715 | ||
2716 | template<typename, typename> | |
2717 | static false_type __test(...); | |
2718 | }; | |
2719 | ||
2720 | struct __do_is_nothrow_swappable_with_impl | |
2721 | { | |
2722 | template<typename _Tp, typename _Up> | |
2723 | static __bool_constant< | |
2724 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) | |
2725 | && | |
2726 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) | |
2727 | > __test(int); | |
2728 | ||
2729 | template<typename, typename> | |
2730 | static false_type __test(...); | |
2731 | }; | |
2732 | ||
2733 | } // namespace __swappable_with_details | |
2734 | ||
2735 | template<typename _Tp, typename _Up> | |
2736 | struct __is_swappable_with_impl | |
2737 | : public __swappable_with_details::__do_is_swappable_with_impl | |
2738 | { | |
2739 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2740 | }; | |
2741 | ||
2742 | // Optimization for the homogenous lvalue case, not required: | |
2743 | template<typename _Tp> | |
2744 | struct __is_swappable_with_impl<_Tp&, _Tp&> | |
2745 | : public __swappable_details::__do_is_swappable_impl | |
2746 | { | |
2747 | typedef decltype(__test<_Tp&>(0)) type; | |
2748 | }; | |
2749 | ||
2750 | template<typename _Tp, typename _Up> | |
2751 | struct __is_nothrow_swappable_with_impl | |
2752 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl | |
2753 | { | |
2754 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2755 | }; | |
2756 | ||
2757 | // Optimization for the homogenous lvalue case, not required: | |
2758 | template<typename _Tp> | |
2759 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> | |
2760 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2761 | { | |
2762 | typedef decltype(__test<_Tp&>(0)) type; | |
2763 | }; | |
2764 | ||
2765 | /// is_swappable_with | |
2766 | template<typename _Tp, typename _Up> | |
2767 | struct is_swappable_with | |
2768 | : public __is_swappable_with_impl<_Tp, _Up>::type | |
2769 | { }; | |
2770 | ||
2771 | /// is_nothrow_swappable_with | |
2772 | template<typename _Tp, typename _Up> | |
2773 | struct is_nothrow_swappable_with | |
2774 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type | |
2775 | { }; | |
2776 | ||
2777 | #if __cplusplus >= 201402L | |
2778 | /// is_swappable_with_v | |
2779 | template<typename _Tp, typename _Up> | |
2780 | constexpr bool is_swappable_with_v = is_swappable_with<_Tp, _Up>::value; | |
2781 | ||
2782 | /// is_nothrow_swappable_with_v | |
2783 | template<typename _Tp, typename _Up> | |
2784 | constexpr bool is_nothrow_swappable_with_v = | |
2785 | is_nothrow_swappable_with<_Tp, _Up>::value; | |
2786 | #endif // __cplusplus >= 201402L | |
2787 | ||
2788 | #endif// c++1z or gnu++11 | |
2789 | ||
2790 | // __is_callable (std::is_callable for C++11) | |
2791 | ||
2792 | template<typename _Result, typename _Ret, typename = __void_t<>> | |
2793 | struct __is_callable_impl : false_type { }; | |
2794 | ||
2795 | template<typename _Result, typename _Ret> | |
2796 | struct __is_callable_impl<_Result, _Ret, __void_t<typename _Result::type>> | |
2797 | : __or_<is_void<_Ret>, is_convertible<typename _Result::type, _Ret>>::type | |
2798 | { }; | |
2799 | ||
2800 | template<typename, typename _Ret = void> | |
2801 | struct __is_callable; // not defined | |
2802 | ||
2803 | template<typename _Fn, typename... _ArgTypes, typename _Ret> | |
2804 | struct __is_callable<_Fn(_ArgTypes...), _Ret> | |
2805 | : __is_callable_impl<result_of<_Fn(_ArgTypes...)>, _Ret>::type | |
2806 | { }; | |
2807 | ||
2808 | // Used by __invoke and __is_nothrow_callable to unwrap a reference_wrapper. | |
2809 | template<typename _Tp, typename _Up = typename decay<_Tp>::type> | |
2810 | struct __inv_unwrap | |
2811 | { | |
2812 | using type = _Tp; | |
2813 | }; | |
2814 | ||
2815 | template<typename _Tp, typename _Up> | |
2816 | struct __inv_unwrap<_Tp, reference_wrapper<_Up>> | |
2817 | { | |
2818 | using type = _Up&; | |
2819 | }; | |
2820 | ||
2821 | template<typename _Fn, typename _Tp, typename... _Args> | |
2822 | constexpr bool __call_is_nt(__invoke_memfun_ref) | |
2823 | { | |
2824 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2825 | return noexcept((std::declval<_Up>().*std::declval<_Fn>())( | |
2826 | std::declval<_Args>()...)); | |
2827 | } | |
2828 | ||
2829 | template<typename _Fn, typename _Tp, typename... _Args> | |
2830 | constexpr bool __call_is_nt(__invoke_memfun_deref) | |
2831 | { | |
2832 | return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())( | |
2833 | std::declval<_Args>()...)); | |
2834 | } | |
2835 | ||
2836 | template<typename _Fn, typename _Tp> | |
2837 | constexpr bool __call_is_nt(__invoke_memobj_ref) | |
2838 | { | |
2839 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2840 | return noexcept(std::declval<_Up>().*std::declval<_Fn>()); | |
2841 | } | |
2842 | ||
2843 | template<typename _Fn, typename _Tp> | |
2844 | constexpr bool __call_is_nt(__invoke_memobj_deref) | |
2845 | { | |
2846 | return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>()); | |
2847 | } | |
2848 | ||
2849 | template<typename _Fn, typename... _Args> | |
2850 | constexpr bool __call_is_nt(__invoke_other) | |
2851 | { | |
2852 | return noexcept(std::declval<_Fn>()(std::declval<_Args>()...)); | |
2853 | } | |
2854 | ||
2855 | template<typename _ResultOf, typename _Fn, typename... _Args> | |
2856 | struct __call_is_nothrow | |
2857 | : __bool_constant< | |
2858 | std::__call_is_nt<_Fn, _Args...>(typename _ResultOf::__invoke_type{})> | |
2859 | { }; | |
2860 | ||
2861 | // __is_nothrow_callable (std::is_nothrow_callable for C++11) | |
2862 | ||
2863 | template<typename, typename _Ret = void> | |
2864 | struct __is_nothrow_callable; // not defined | |
2865 | ||
2866 | template<typename _Fn, typename... _Args, typename _Ret> | |
2867 | struct __is_nothrow_callable<_Fn(_Args...), _Ret> | |
2868 | : __and_<__is_callable<_Fn(_Args...), _Ret>, | |
2869 | __call_is_nothrow<result_of<_Fn(_Args...)>, _Fn, _Args...>>::type | |
2870 | { }; | |
2871 | ||
2872 | struct __nonesuch { | |
2873 | __nonesuch() = delete; | |
2874 | ~__nonesuch() = delete; | |
2875 | __nonesuch(__nonesuch const&) = delete; | |
2876 | void operator=(__nonesuch const&) = delete; | |
2877 | }; | |
2878 | ||
2879 | #if __cplusplus > 201402L | |
2880 | # define __cpp_lib_is_callable 201603 | |
2881 | ||
2882 | /// std::is_callable | |
2883 | template<typename, typename _Ret = void> | |
2884 | struct is_callable; // not defined | |
2885 | ||
2886 | template<typename _Fn, typename... _ArgTypes, typename _Ret> | |
2887 | struct is_callable<_Fn(_ArgTypes...), _Ret> | |
2888 | : __is_callable<_Fn(_ArgTypes...), _Ret>::type | |
2889 | { }; | |
2890 | ||
2891 | /// std::is_nothrow_callable | |
2892 | template<typename, typename _Ret = void> | |
2893 | struct is_nothrow_callable; // not defined | |
2894 | ||
2895 | template<typename _Fn, typename... _ArgTypes, typename _Ret> | |
2896 | struct is_nothrow_callable<_Fn(_ArgTypes...), _Ret> | |
2897 | : __is_nothrow_callable<_Fn(_ArgTypes...), _Ret>::type | |
2898 | { }; | |
2899 | ||
2900 | /// std::is_callable_v | |
2901 | template<typename T, typename _Ret = void> | |
2902 | constexpr bool is_callable_v = is_callable<T, _Ret>::value; | |
2903 | ||
2904 | /// std::is_nothrow_callable_v | |
2905 | template<typename T, typename _Ret = void> | |
2906 | constexpr bool is_nothrow_callable_v = is_nothrow_callable<T, _Ret>::value; | |
2907 | #endif // C++17 | |
2908 | ||
2909 | ||
2910 | #if __cplusplus > 201402L | |
2911 | # define __cpp_lib_type_trait_variable_templates 201510L | |
2912 | template <typename _Tp> | |
2913 | constexpr bool is_void_v = is_void<_Tp>::value; | |
2914 | template <typename _Tp> | |
2915 | constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; | |
2916 | template <typename _Tp> | |
2917 | constexpr bool is_integral_v = is_integral<_Tp>::value; | |
2918 | template <typename _Tp> | |
2919 | constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; | |
2920 | template <typename _Tp> | |
2921 | constexpr bool is_array_v = is_array<_Tp>::value; | |
2922 | template <typename _Tp> | |
2923 | constexpr bool is_pointer_v = is_pointer<_Tp>::value; | |
2924 | template <typename _Tp> | |
2925 | constexpr bool is_lvalue_reference_v = is_lvalue_reference<_Tp>::value; | |
2926 | template <typename _Tp> | |
2927 | constexpr bool is_rvalue_reference_v = is_rvalue_reference<_Tp>::value; | |
2928 | template <typename _Tp> | |
2929 | constexpr bool is_member_object_pointer_v = | |
2930 | is_member_object_pointer<_Tp>::value; | |
2931 | template <typename _Tp> | |
2932 | constexpr bool is_member_function_pointer_v = | |
2933 | is_member_function_pointer<_Tp>::value; | |
2934 | template <typename _Tp> | |
2935 | constexpr bool is_enum_v = is_enum<_Tp>::value; | |
2936 | template <typename _Tp> | |
2937 | constexpr bool is_union_v = is_union<_Tp>::value; | |
2938 | template <typename _Tp> | |
2939 | constexpr bool is_class_v = is_class<_Tp>::value; | |
2940 | template <typename _Tp> | |
2941 | constexpr bool is_function_v = is_function<_Tp>::value; | |
2942 | template <typename _Tp> | |
2943 | constexpr bool is_reference_v = is_reference<_Tp>::value; | |
2944 | template <typename _Tp> | |
2945 | constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; | |
2946 | template <typename _Tp> | |
2947 | constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; | |
2948 | template <typename _Tp> | |
2949 | constexpr bool is_object_v = is_object<_Tp>::value; | |
2950 | template <typename _Tp> | |
2951 | constexpr bool is_scalar_v = is_scalar<_Tp>::value; | |
2952 | template <typename _Tp> | |
2953 | constexpr bool is_compound_v = is_compound<_Tp>::value; | |
2954 | template <typename _Tp> | |
2955 | constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; | |
2956 | template <typename _Tp> | |
2957 | constexpr bool is_const_v = is_const<_Tp>::value; | |
2958 | template <typename _Tp> | |
2959 | constexpr bool is_volatile_v = is_volatile<_Tp>::value; | |
2960 | template <typename _Tp> | |
2961 | constexpr bool is_trivial_v = is_trivial<_Tp>::value; | |
2962 | template <typename _Tp> | |
2963 | constexpr bool is_trivially_copyable_v = is_trivially_copyable<_Tp>::value; | |
2964 | template <typename _Tp> | |
2965 | constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; | |
2966 | template <typename _Tp> | |
2967 | constexpr bool is_pod_v = is_pod<_Tp>::value; | |
2968 | template <typename _Tp> | |
2969 | constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; | |
2970 | template <typename _Tp> | |
2971 | constexpr bool is_empty_v = is_empty<_Tp>::value; | |
2972 | template <typename _Tp> | |
2973 | constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; | |
2974 | template <typename _Tp> | |
2975 | constexpr bool is_abstract_v = is_abstract<_Tp>::value; | |
2976 | template <typename _Tp> | |
2977 | constexpr bool is_final_v = is_final<_Tp>::value; | |
2978 | template <typename _Tp> | |
2979 | constexpr bool is_signed_v = is_signed<_Tp>::value; | |
2980 | template <typename _Tp> | |
2981 | constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; | |
2982 | template <typename _Tp, typename... _Args> | |
2983 | constexpr bool is_constructible_v = is_constructible<_Tp, _Args...>::value; | |
2984 | template <typename _Tp> | |
2985 | constexpr bool is_default_constructible_v = | |
2986 | is_default_constructible<_Tp>::value; | |
2987 | template <typename _Tp> | |
2988 | constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value; | |
2989 | template <typename _Tp> | |
2990 | constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value; | |
2991 | template <typename _Tp, typename _Up> | |
2992 | constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; | |
2993 | template <typename _Tp> | |
2994 | constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; | |
2995 | template <typename _Tp> | |
2996 | constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; | |
2997 | template <typename _Tp> | |
2998 | constexpr bool is_destructible_v = is_destructible<_Tp>::value; | |
2999 | template <typename _Tp, typename... _Args> | |
3000 | constexpr bool is_trivially_constructible_v = | |
3001 | is_trivially_constructible<_Tp, _Args...>::value; | |
3002 | template <typename _Tp> | |
3003 | constexpr bool is_trivially_default_constructible_v = | |
3004 | is_trivially_default_constructible<_Tp>::value; | |
3005 | template <typename _Tp> | |
3006 | constexpr bool is_trivially_copy_constructible_v = | |
3007 | is_trivially_copy_constructible<_Tp>::value; | |
3008 | template <typename _Tp> | |
3009 | constexpr bool is_trivially_move_constructible_v = | |
3010 | is_trivially_move_constructible<_Tp>::value; | |
3011 | template <typename _Tp, typename _Up> | |
3012 | constexpr bool is_trivially_assignable_v = | |
3013 | is_trivially_assignable<_Tp, _Up>::value; | |
3014 | template <typename _Tp> | |
3015 | constexpr bool is_trivially_copy_assignable_v = | |
3016 | is_trivially_copy_assignable<_Tp>::value; | |
3017 | template <typename _Tp> | |
3018 | constexpr bool is_trivially_move_assignable_v = | |
3019 | is_trivially_move_assignable<_Tp>::value; | |
3020 | template <typename _Tp> | |
3021 | constexpr bool is_trivially_destructible_v = | |
3022 | is_trivially_destructible<_Tp>::value; | |
3023 | template <typename _Tp, typename... _Args> | |
3024 | constexpr bool is_nothrow_constructible_v = | |
3025 | is_nothrow_constructible<_Tp, _Args...>::value; | |
3026 | template <typename _Tp> | |
3027 | constexpr bool is_nothrow_default_constructible_v = | |
3028 | is_nothrow_default_constructible<_Tp>::value; | |
3029 | template <typename _Tp> | |
3030 | constexpr bool is_nothrow_copy_constructible_v = | |
3031 | is_nothrow_copy_constructible<_Tp>::value; | |
3032 | template <typename _Tp> | |
3033 | constexpr bool is_nothrow_move_constructible_v = | |
3034 | is_nothrow_move_constructible<_Tp>::value; | |
3035 | template <typename _Tp, typename _Up> | |
3036 | constexpr bool is_nothrow_assignable_v = | |
3037 | is_nothrow_assignable<_Tp, _Up>::value; | |
3038 | template <typename _Tp> | |
3039 | constexpr bool is_nothrow_copy_assignable_v = | |
3040 | is_nothrow_copy_assignable<_Tp>::value; | |
3041 | template <typename _Tp> | |
3042 | constexpr bool is_nothrow_move_assignable_v = | |
3043 | is_nothrow_move_assignable<_Tp>::value; | |
3044 | template <typename _Tp> | |
3045 | constexpr bool is_nothrow_destructible_v = | |
3046 | is_nothrow_destructible<_Tp>::value; | |
3047 | template <typename _Tp> | |
3048 | constexpr bool has_virtual_destructor_v = | |
3049 | has_virtual_destructor<_Tp>::value; | |
3050 | template <typename _Tp> | |
3051 | constexpr size_t alignment_of_v = alignment_of<_Tp>::value; | |
3052 | template <typename _Tp> | |
3053 | constexpr size_t rank_v = rank<_Tp>::value; | |
3054 | template <typename _Tp, unsigned _Idx = 0> | |
3055 | constexpr size_t extent_v = extent<_Tp, _Idx>::value; | |
3056 | template <typename _Tp, typename _Up> | |
3057 | constexpr bool is_same_v = is_same<_Tp, _Up>::value; | |
3058 | template <typename _Base, typename _Derived> | |
3059 | constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; | |
3060 | template <typename _From, typename _To> | |
3061 | constexpr bool is_convertible_v = is_convertible<_From, _To>::value; | |
3062 | ||
3063 | #ifdef __has_builtin | |
3064 | # if !__has_builtin(__has_unique_object_representations) | |
3065 | // Try not to break non-GNU compilers that don't support the built-in: | |
3066 | # define _GLIBCXX_NO_BUILTIN_HAS_UNIQ_OBJ_REP 1 | |
3067 | # endif | |
3068 | #endif | |
3069 | ||
3070 | #ifndef _GLIBCXX_NO_BUILTIN_HAS_UNIQ_OBJ_REP | |
3071 | # define __cpp_lib_has_unique_object_representations 201606 | |
3072 | /// has_unique_object_representations | |
3073 | template<typename _Tp> | |
3074 | struct has_unique_object_representations | |
3075 | : bool_constant<__has_unique_object_representations( | |
3076 | remove_cv_t<remove_all_extents_t<_Tp>> | |
3077 | )> | |
3078 | { }; | |
3079 | #endif | |
3080 | #undef _GLIBCXX_NO_BUILTIN_HAS_UNIQ_OBJ_REP | |
3081 | ||
3082 | #endif // C++17 | |
3083 | ||
3084 | _GLIBCXX_END_NAMESPACE_VERSION | |
3085 | } // namespace std | |
3086 | ||
3087 | #endif // C++11 | |
3088 | ||
3089 | #endif // _GLIBCXX_TYPE_TRAITS |