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c0ffa2ba | 1 | // C++11 <type_traits> -*- C++ -*- |
af13a7a6 | 2 | |
5624e564 | 3 | // Copyright (C) 2007-2015 Free Software Foundation, Inc. |
af13a7a6 BK |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
af13a7a6 BK |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
af13a7a6 BK |
24 | |
25 | /** @file include/type_traits | |
26 | * This is a Standard C++ Library header. | |
27 | */ | |
28 | ||
4514bed6 BK |
29 | #ifndef _GLIBCXX_TYPE_TRAITS |
30 | #define _GLIBCXX_TYPE_TRAITS 1 | |
af13a7a6 BK |
31 | |
32 | #pragma GCC system_header | |
33 | ||
734f5023 | 34 | #if __cplusplus < 201103L |
ab65a4c7 | 35 | # include <bits/c++0x_warning.h> |
57317d2a | 36 | #else |
af13a7a6 | 37 | |
8fc81078 | 38 | #include <bits/c++config.h> |
e133ace8 | 39 | |
c0eef1c8 JW |
40 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
41 | # if defined (__UINT_LEAST16_TYPE__) && defined(__UINT_LEAST32_TYPE__) | |
21e2806a JW |
42 | namespace std |
43 | { | |
c0eef1c8 JW |
44 | typedef __UINT_LEAST16_TYPE__ uint_least16_t; |
45 | typedef __UINT_LEAST32_TYPE__ uint_least32_t; | |
21e2806a | 46 | } |
c0eef1c8 JW |
47 | # else |
48 | # include <cstdint> | |
49 | # endif | |
50 | #endif | |
51 | ||
21e2806a JW |
52 | namespace std _GLIBCXX_VISIBILITY(default) |
53 | { | |
54 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
55 | ||
8e32aa11 | 56 | /** |
c0ffa2ba | 57 | * @defgroup metaprogramming Metaprogramming |
13901e4b JW |
58 | * @ingroup utilities |
59 | * | |
60 | * Template utilities for compile-time introspection and modification, | |
61 | * including type classification traits, type property inspection traits | |
62 | * and type transformation traits. | |
63 | * | |
5b9daa7e BK |
64 | * @{ |
65 | */ | |
ac65b7d2 DK |
66 | |
67 | /// integral_constant | |
68 | template<typename _Tp, _Tp __v> | |
69 | struct integral_constant | |
70 | { | |
71 | static constexpr _Tp value = __v; | |
72 | typedef _Tp value_type; | |
73 | typedef integral_constant<_Tp, __v> type; | |
9191d7a8 | 74 | constexpr operator value_type() const { return value; } |
db113eda | 75 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
76 | |
77 | #define __cpp_lib_integral_constant_callable 201304 | |
78 | ||
db113eda JW |
79 | constexpr value_type operator()() const { return value; } |
80 | #endif | |
ac65b7d2 DK |
81 | }; |
82 | ||
c0ffa2ba BK |
83 | template<typename _Tp, _Tp __v> |
84 | constexpr _Tp integral_constant<_Tp, __v>::value; | |
85 | ||
13901e4b | 86 | /// The type used as a compile-time boolean with true value. |
ac65b7d2 DK |
87 | typedef integral_constant<bool, true> true_type; |
88 | ||
13901e4b | 89 | /// The type used as a compile-time boolean with false value. |
ac65b7d2 DK |
90 | typedef integral_constant<bool, false> false_type; |
91 | ||
f6b640be JW |
92 | template<bool __v> |
93 | using __bool_constant = integral_constant<bool, __v>; | |
94 | ||
123c516a | 95 | // Meta programming helper types. |
53dc5044 | 96 | |
123c516a PC |
97 | template<bool, typename, typename> |
98 | struct conditional; | |
53dc5044 | 99 | |
dd7b175e | 100 | template<typename...> |
123c516a PC |
101 | struct __or_; |
102 | ||
ac65b7d2 DK |
103 | template<> |
104 | struct __or_<> | |
105 | : public false_type | |
106 | { }; | |
107 | ||
dd7b175e PC |
108 | template<typename _B1> |
109 | struct __or_<_B1> | |
110 | : public _B1 | |
111 | { }; | |
112 | ||
123c516a PC |
113 | template<typename _B1, typename _B2> |
114 | struct __or_<_B1, _B2> | |
115 | : public conditional<_B1::value, _B1, _B2>::type | |
116 | { }; | |
117 | ||
118 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
119 | struct __or_<_B1, _B2, _B3, _Bn...> | |
120 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
121 | { }; | |
53dc5044 | 122 | |
dd7b175e | 123 | template<typename...> |
123c516a | 124 | struct __and_; |
53dc5044 | 125 | |
ac65b7d2 DK |
126 | template<> |
127 | struct __and_<> | |
128 | : public true_type | |
129 | { }; | |
130 | ||
dd7b175e PC |
131 | template<typename _B1> |
132 | struct __and_<_B1> | |
133 | : public _B1 | |
134 | { }; | |
135 | ||
123c516a PC |
136 | template<typename _B1, typename _B2> |
137 | struct __and_<_B1, _B2> | |
138 | : public conditional<_B1::value, _B2, _B1>::type | |
139 | { }; | |
140 | ||
141 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
142 | struct __and_<_B1, _B2, _B3, _Bn...> | |
143 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
144 | { }; | |
145 | ||
146 | template<typename _Pp> | |
147 | struct __not_ | |
148 | : public integral_constant<bool, !_Pp::value> | |
149 | { }; | |
150 | ||
b3618b71 DK |
151 | // For several sfinae-friendly trait implementations we transport both the |
152 | // result information (as the member type) and the failure information (no | |
153 | // member type). This is very similar to std::enable_if, but we cannot use | |
154 | // them, because we need to derive from them as an implementation detail. | |
155 | ||
156 | template<typename _Tp> | |
157 | struct __success_type | |
158 | { typedef _Tp type; }; | |
159 | ||
160 | struct __failure_type | |
161 | { }; | |
162 | ||
c0ffa2ba | 163 | // Primary type categories. |
123c516a | 164 | |
53dc5044 PC |
165 | template<typename> |
166 | struct remove_cv; | |
167 | ||
168 | template<typename> | |
169 | struct __is_void_helper | |
170 | : public false_type { }; | |
53dc5044 | 171 | |
123c516a PC |
172 | template<> |
173 | struct __is_void_helper<void> | |
174 | : public true_type { }; | |
53dc5044 PC |
175 | |
176 | /// is_void | |
177 | template<typename _Tp> | |
178 | struct is_void | |
82b12c4b | 179 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
180 | { }; |
181 | ||
182 | template<typename> | |
183 | struct __is_integral_helper | |
184 | : public false_type { }; | |
123c516a PC |
185 | |
186 | template<> | |
187 | struct __is_integral_helper<bool> | |
188 | : public true_type { }; | |
189 | ||
190 | template<> | |
191 | struct __is_integral_helper<char> | |
192 | : public true_type { }; | |
193 | ||
194 | template<> | |
195 | struct __is_integral_helper<signed char> | |
196 | : public true_type { }; | |
197 | ||
198 | template<> | |
199 | struct __is_integral_helper<unsigned char> | |
200 | : public true_type { }; | |
201 | ||
53dc5044 | 202 | #ifdef _GLIBCXX_USE_WCHAR_T |
123c516a PC |
203 | template<> |
204 | struct __is_integral_helper<wchar_t> | |
205 | : public true_type { }; | |
53dc5044 | 206 | #endif |
123c516a PC |
207 | |
208 | template<> | |
209 | struct __is_integral_helper<char16_t> | |
210 | : public true_type { }; | |
211 | ||
212 | template<> | |
213 | struct __is_integral_helper<char32_t> | |
214 | : public true_type { }; | |
215 | ||
216 | template<> | |
217 | struct __is_integral_helper<short> | |
218 | : public true_type { }; | |
219 | ||
220 | template<> | |
221 | struct __is_integral_helper<unsigned short> | |
222 | : public true_type { }; | |
223 | ||
224 | template<> | |
225 | struct __is_integral_helper<int> | |
226 | : public true_type { }; | |
227 | ||
228 | template<> | |
229 | struct __is_integral_helper<unsigned int> | |
230 | : public true_type { }; | |
231 | ||
232 | template<> | |
233 | struct __is_integral_helper<long> | |
234 | : public true_type { }; | |
235 | ||
236 | template<> | |
237 | struct __is_integral_helper<unsigned long> | |
238 | : public true_type { }; | |
239 | ||
240 | template<> | |
241 | struct __is_integral_helper<long long> | |
242 | : public true_type { }; | |
243 | ||
244 | template<> | |
245 | struct __is_integral_helper<unsigned long long> | |
246 | : public true_type { }; | |
53dc5044 | 247 | |
78a7c317 DD |
248 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
249 | // uses one of these types for size_t. | |
250 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
6d585f01 | 251 | template<> |
78a7c317 | 252 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
6d585f01 PC |
253 | : public true_type { }; |
254 | ||
255 | template<> | |
78a7c317 DD |
256 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
257 | : public true_type { }; | |
258 | #endif | |
259 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
260 | template<> | |
261 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
262 | : public true_type { }; | |
263 | ||
264 | template<> | |
265 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
266 | : public true_type { }; | |
267 | #endif | |
268 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
269 | template<> | |
270 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
271 | : public true_type { }; | |
272 | ||
273 | template<> | |
274 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
275 | : public true_type { }; | |
276 | #endif | |
277 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
278 | template<> | |
279 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
280 | : public true_type { }; | |
281 | ||
282 | template<> | |
283 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
6d585f01 PC |
284 | : public true_type { }; |
285 | #endif | |
286 | ||
53dc5044 PC |
287 | /// is_integral |
288 | template<typename _Tp> | |
289 | struct is_integral | |
82b12c4b | 290 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
291 | { }; |
292 | ||
293 | template<typename> | |
294 | struct __is_floating_point_helper | |
295 | : public false_type { }; | |
123c516a PC |
296 | |
297 | template<> | |
298 | struct __is_floating_point_helper<float> | |
299 | : public true_type { }; | |
300 | ||
301 | template<> | |
302 | struct __is_floating_point_helper<double> | |
303 | : public true_type { }; | |
304 | ||
305 | template<> | |
306 | struct __is_floating_point_helper<long double> | |
307 | : public true_type { }; | |
53dc5044 | 308 | |
6d585f01 PC |
309 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
310 | template<> | |
311 | struct __is_floating_point_helper<__float128> | |
312 | : public true_type { }; | |
313 | #endif | |
314 | ||
53dc5044 PC |
315 | /// is_floating_point |
316 | template<typename _Tp> | |
317 | struct is_floating_point | |
82b12c4b | 318 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
319 | { }; |
320 | ||
321 | /// is_array | |
322 | template<typename> | |
323 | struct is_array | |
324 | : public false_type { }; | |
325 | ||
326 | template<typename _Tp, std::size_t _Size> | |
327 | struct is_array<_Tp[_Size]> | |
328 | : public true_type { }; | |
329 | ||
330 | template<typename _Tp> | |
331 | struct is_array<_Tp[]> | |
332 | : public true_type { }; | |
333 | ||
334 | template<typename> | |
335 | struct __is_pointer_helper | |
336 | : public false_type { }; | |
123c516a PC |
337 | |
338 | template<typename _Tp> | |
339 | struct __is_pointer_helper<_Tp*> | |
340 | : public true_type { }; | |
53dc5044 PC |
341 | |
342 | /// is_pointer | |
343 | template<typename _Tp> | |
344 | struct is_pointer | |
82b12c4b | 345 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
346 | { }; |
347 | ||
123c516a PC |
348 | /// is_lvalue_reference |
349 | template<typename> | |
350 | struct is_lvalue_reference | |
351 | : public false_type { }; | |
352 | ||
53dc5044 | 353 | template<typename _Tp> |
123c516a PC |
354 | struct is_lvalue_reference<_Tp&> |
355 | : public true_type { }; | |
356 | ||
357 | /// is_rvalue_reference | |
358 | template<typename> | |
359 | struct is_rvalue_reference | |
360 | : public false_type { }; | |
53dc5044 | 361 | |
53dc5044 | 362 | template<typename _Tp> |
123c516a PC |
363 | struct is_rvalue_reference<_Tp&&> |
364 | : public true_type { }; | |
365 | ||
366 | template<typename> | |
53dc5044 PC |
367 | struct is_function; |
368 | ||
369 | template<typename> | |
370 | struct __is_member_object_pointer_helper | |
371 | : public false_type { }; | |
123c516a PC |
372 | |
373 | template<typename _Tp, typename _Cp> | |
374 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
375 | : public integral_constant<bool, !is_function<_Tp>::value> { }; | |
53dc5044 PC |
376 | |
377 | /// is_member_object_pointer | |
378 | template<typename _Tp> | |
379 | struct is_member_object_pointer | |
82b12c4b FD |
380 | : public __is_member_object_pointer_helper< |
381 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
382 | { }; |
383 | ||
384 | template<typename> | |
385 | struct __is_member_function_pointer_helper | |
386 | : public false_type { }; | |
123c516a PC |
387 | |
388 | template<typename _Tp, typename _Cp> | |
389 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
390 | : public integral_constant<bool, is_function<_Tp>::value> { }; | |
53dc5044 PC |
391 | |
392 | /// is_member_function_pointer | |
393 | template<typename _Tp> | |
394 | struct is_member_function_pointer | |
82b12c4b FD |
395 | : public __is_member_function_pointer_helper< |
396 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
397 | { }; |
398 | ||
399 | /// is_enum | |
400 | template<typename _Tp> | |
401 | struct is_enum | |
402 | : public integral_constant<bool, __is_enum(_Tp)> | |
403 | { }; | |
404 | ||
405 | /// is_union | |
406 | template<typename _Tp> | |
407 | struct is_union | |
408 | : public integral_constant<bool, __is_union(_Tp)> | |
409 | { }; | |
410 | ||
411 | /// is_class | |
412 | template<typename _Tp> | |
413 | struct is_class | |
414 | : public integral_constant<bool, __is_class(_Tp)> | |
415 | { }; | |
416 | ||
417 | /// is_function | |
418 | template<typename> | |
419 | struct is_function | |
420 | : public false_type { }; | |
123c516a | 421 | |
53dc5044 PC |
422 | template<typename _Res, typename... _ArgTypes> |
423 | struct is_function<_Res(_ArgTypes...)> | |
424 | : public true_type { }; | |
123c516a | 425 | |
89898034 DK |
426 | template<typename _Res, typename... _ArgTypes> |
427 | struct is_function<_Res(_ArgTypes...) &> | |
428 | : public true_type { }; | |
429 | ||
430 | template<typename _Res, typename... _ArgTypes> | |
431 | struct is_function<_Res(_ArgTypes...) &&> | |
432 | : public true_type { }; | |
433 | ||
53dc5044 PC |
434 | template<typename _Res, typename... _ArgTypes> |
435 | struct is_function<_Res(_ArgTypes......)> | |
436 | : public true_type { }; | |
123c516a | 437 | |
89898034 DK |
438 | template<typename _Res, typename... _ArgTypes> |
439 | struct is_function<_Res(_ArgTypes......) &> | |
440 | : public true_type { }; | |
441 | ||
442 | template<typename _Res, typename... _ArgTypes> | |
443 | struct is_function<_Res(_ArgTypes......) &&> | |
444 | : public true_type { }; | |
445 | ||
53dc5044 PC |
446 | template<typename _Res, typename... _ArgTypes> |
447 | struct is_function<_Res(_ArgTypes...) const> | |
448 | : public true_type { }; | |
123c516a | 449 | |
89898034 DK |
450 | template<typename _Res, typename... _ArgTypes> |
451 | struct is_function<_Res(_ArgTypes...) const &> | |
452 | : public true_type { }; | |
453 | ||
454 | template<typename _Res, typename... _ArgTypes> | |
455 | struct is_function<_Res(_ArgTypes...) const &&> | |
456 | : public true_type { }; | |
457 | ||
53dc5044 PC |
458 | template<typename _Res, typename... _ArgTypes> |
459 | struct is_function<_Res(_ArgTypes......) const> | |
460 | : public true_type { }; | |
123c516a | 461 | |
89898034 DK |
462 | template<typename _Res, typename... _ArgTypes> |
463 | struct is_function<_Res(_ArgTypes......) const &> | |
464 | : public true_type { }; | |
465 | ||
466 | template<typename _Res, typename... _ArgTypes> | |
467 | struct is_function<_Res(_ArgTypes......) const &&> | |
468 | : public true_type { }; | |
469 | ||
53dc5044 PC |
470 | template<typename _Res, typename... _ArgTypes> |
471 | struct is_function<_Res(_ArgTypes...) volatile> | |
472 | : public true_type { }; | |
123c516a | 473 | |
89898034 DK |
474 | template<typename _Res, typename... _ArgTypes> |
475 | struct is_function<_Res(_ArgTypes...) volatile &> | |
476 | : public true_type { }; | |
477 | ||
478 | template<typename _Res, typename... _ArgTypes> | |
479 | struct is_function<_Res(_ArgTypes...) volatile &&> | |
480 | : public true_type { }; | |
481 | ||
53dc5044 PC |
482 | template<typename _Res, typename... _ArgTypes> |
483 | struct is_function<_Res(_ArgTypes......) volatile> | |
484 | : public true_type { }; | |
123c516a | 485 | |
89898034 DK |
486 | template<typename _Res, typename... _ArgTypes> |
487 | struct is_function<_Res(_ArgTypes......) volatile &> | |
488 | : public true_type { }; | |
489 | ||
490 | template<typename _Res, typename... _ArgTypes> | |
491 | struct is_function<_Res(_ArgTypes......) volatile &&> | |
492 | : public true_type { }; | |
493 | ||
53dc5044 PC |
494 | template<typename _Res, typename... _ArgTypes> |
495 | struct is_function<_Res(_ArgTypes...) const volatile> | |
496 | : public true_type { }; | |
123c516a | 497 | |
89898034 DK |
498 | template<typename _Res, typename... _ArgTypes> |
499 | struct is_function<_Res(_ArgTypes...) const volatile &> | |
500 | : public true_type { }; | |
501 | ||
502 | template<typename _Res, typename... _ArgTypes> | |
503 | struct is_function<_Res(_ArgTypes...) const volatile &&> | |
504 | : public true_type { }; | |
505 | ||
53dc5044 PC |
506 | template<typename _Res, typename... _ArgTypes> |
507 | struct is_function<_Res(_ArgTypes......) const volatile> | |
508 | : public true_type { }; | |
509 | ||
89898034 DK |
510 | template<typename _Res, typename... _ArgTypes> |
511 | struct is_function<_Res(_ArgTypes......) const volatile &> | |
512 | : public true_type { }; | |
513 | ||
514 | template<typename _Res, typename... _ArgTypes> | |
515 | struct is_function<_Res(_ArgTypes......) const volatile &&> | |
516 | : public true_type { }; | |
517 | ||
a15f7cb8 ESR |
518 | #define __cpp_lib_is_null_pointer 201309 |
519 | ||
1e673415 | 520 | template<typename> |
aa940ab5 | 521 | struct __is_null_pointer_helper |
1e673415 | 522 | : public false_type { }; |
123c516a PC |
523 | |
524 | template<> | |
aa940ab5 | 525 | struct __is_null_pointer_helper<std::nullptr_t> |
123c516a | 526 | : public true_type { }; |
1e673415 | 527 | |
aa940ab5 PC |
528 | /// is_null_pointer (LWG 2247). |
529 | template<typename _Tp> | |
530 | struct is_null_pointer | |
531 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
532 | { }; | |
533 | ||
534 | /// __is_nullptr_t (extension). | |
1e673415 PC |
535 | template<typename _Tp> |
536 | struct __is_nullptr_t | |
aa940ab5 | 537 | : public is_null_pointer<_Tp> |
1e673415 PC |
538 | { }; |
539 | ||
c0ffa2ba | 540 | // Composite type categories. |
123c516a PC |
541 | |
542 | /// is_reference | |
543 | template<typename _Tp> | |
544 | struct is_reference | |
545 | : public __or_<is_lvalue_reference<_Tp>, | |
546 | is_rvalue_reference<_Tp>>::type | |
547 | { }; | |
548 | ||
53dc5044 PC |
549 | /// is_arithmetic |
550 | template<typename _Tp> | |
551 | struct is_arithmetic | |
123c516a | 552 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
53dc5044 PC |
553 | { }; |
554 | ||
555 | /// is_fundamental | |
556 | template<typename _Tp> | |
557 | struct is_fundamental | |
aa940ab5 PC |
558 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
559 | is_null_pointer<_Tp>>::type | |
53dc5044 PC |
560 | { }; |
561 | ||
562 | /// is_object | |
563 | template<typename _Tp> | |
564 | struct is_object | |
123c516a PC |
565 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
566 | is_void<_Tp>>>::type | |
53dc5044 PC |
567 | { }; |
568 | ||
123c516a | 569 | template<typename> |
53dc5044 PC |
570 | struct is_member_pointer; |
571 | ||
572 | /// is_scalar | |
573 | template<typename _Tp> | |
574 | struct is_scalar | |
123c516a | 575 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
aa940ab5 | 576 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
53dc5044 PC |
577 | { }; |
578 | ||
579 | /// is_compound | |
580 | template<typename _Tp> | |
581 | struct is_compound | |
582 | : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; | |
583 | ||
53dc5044 PC |
584 | template<typename _Tp> |
585 | struct __is_member_pointer_helper | |
586 | : public false_type { }; | |
123c516a PC |
587 | |
588 | template<typename _Tp, typename _Cp> | |
589 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
590 | : public true_type { }; | |
53dc5044 | 591 | |
13901e4b | 592 | /// is_member_pointer |
53dc5044 | 593 | template<typename _Tp> |
123c516a | 594 | struct is_member_pointer |
82b12c4b | 595 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
596 | { }; |
597 | ||
89898034 DK |
598 | // Utility to detect referenceable types ([defns.referenceable]). |
599 | ||
600 | template<typename _Tp> | |
601 | struct __is_referenceable | |
602 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type | |
603 | { }; | |
604 | ||
605 | template<typename _Res, typename... _Args> | |
606 | struct __is_referenceable<_Res(_Args...)> | |
607 | : public true_type | |
608 | { }; | |
609 | ||
610 | template<typename _Res, typename... _Args> | |
611 | struct __is_referenceable<_Res(_Args......)> | |
612 | : public true_type | |
613 | { }; | |
614 | ||
c0ffa2ba | 615 | // Type properties. |
123c516a | 616 | |
53dc5044 PC |
617 | /// is_const |
618 | template<typename> | |
619 | struct is_const | |
620 | : public false_type { }; | |
621 | ||
622 | template<typename _Tp> | |
623 | struct is_const<_Tp const> | |
624 | : public true_type { }; | |
625 | ||
626 | /// is_volatile | |
627 | template<typename> | |
628 | struct is_volatile | |
629 | : public false_type { }; | |
630 | ||
631 | template<typename _Tp> | |
632 | struct is_volatile<_Tp volatile> | |
633 | : public true_type { }; | |
634 | ||
123c516a PC |
635 | /// is_trivial |
636 | template<typename _Tp> | |
637 | struct is_trivial | |
638 | : public integral_constant<bool, __is_trivial(_Tp)> | |
639 | { }; | |
640 | ||
f5e523b7 VV |
641 | // is_trivially_copyable |
642 | template<typename _Tp> | |
643 | struct is_trivially_copyable | |
644 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
645 | { }; | |
123c516a PC |
646 | |
647 | /// is_standard_layout | |
648 | template<typename _Tp> | |
649 | struct is_standard_layout | |
650 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
651 | { }; | |
652 | ||
653 | /// is_pod | |
654 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
655 | template<typename _Tp> | |
656 | struct is_pod | |
657 | : public integral_constant<bool, __is_pod(_Tp)> | |
658 | { }; | |
659 | ||
660 | /// is_literal_type | |
661 | template<typename _Tp> | |
662 | struct is_literal_type | |
663 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
664 | { }; | |
665 | ||
53dc5044 PC |
666 | /// is_empty |
667 | template<typename _Tp> | |
668 | struct is_empty | |
669 | : public integral_constant<bool, __is_empty(_Tp)> | |
670 | { }; | |
671 | ||
672 | /// is_polymorphic | |
673 | template<typename _Tp> | |
674 | struct is_polymorphic | |
675 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
676 | { }; | |
677 | ||
4db7fcb9 ESR |
678 | #if __cplusplus >= 201402L |
679 | #define __cpp_lib_is_final 201402L | |
680 | /// is_final | |
681 | template<typename _Tp> | |
682 | struct is_final | |
683 | : public integral_constant<bool, __is_final(_Tp)> | |
684 | { }; | |
685 | #endif | |
686 | ||
53dc5044 PC |
687 | /// is_abstract |
688 | template<typename _Tp> | |
689 | struct is_abstract | |
690 | : public integral_constant<bool, __is_abstract(_Tp)> | |
691 | { }; | |
692 | ||
123c516a | 693 | template<typename _Tp, |
6a4b1a00 | 694 | bool = is_arithmetic<_Tp>::value> |
123c516a PC |
695 | struct __is_signed_helper |
696 | : public false_type { }; | |
697 | ||
53dc5044 | 698 | template<typename _Tp> |
6a4b1a00 PC |
699 | struct __is_signed_helper<_Tp, true> |
700 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
53dc5044 PC |
701 | { }; |
702 | ||
123c516a | 703 | /// is_signed |
53dc5044 | 704 | template<typename _Tp> |
123c516a | 705 | struct is_signed |
82b12c4b | 706 | : public __is_signed_helper<_Tp>::type |
123c516a PC |
707 | { }; |
708 | ||
709 | /// is_unsigned | |
710 | template<typename _Tp> | |
711 | struct is_unsigned | |
712 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type | |
713 | { }; | |
714 | ||
715 | ||
c0ffa2ba | 716 | // Destructible and constructible type properties. |
123c516a | 717 | |
53dc5044 | 718 | template<typename> |
123c516a | 719 | struct add_rvalue_reference; |
53dc5044 | 720 | |
13901e4b JW |
721 | /** |
722 | * @brief Utility to simplify expressions used in unevaluated operands | |
723 | * @ingroup utilities | |
724 | */ | |
53dc5044 | 725 | template<typename _Tp> |
123c516a | 726 | typename add_rvalue_reference<_Tp>::type declval() noexcept; |
53dc5044 | 727 | |
123c516a PC |
728 | template<typename, unsigned = 0> |
729 | struct extent; | |
730 | ||
731 | template<typename> | |
732 | struct remove_all_extents; | |
733 | ||
734 | template<typename _Tp> | |
735 | struct __is_array_known_bounds | |
736 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
53dc5044 PC |
737 | { }; |
738 | ||
123c516a PC |
739 | template<typename _Tp> |
740 | struct __is_array_unknown_bounds | |
741 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>::type | |
53dc5044 | 742 | { }; |
2c7a09d7 | 743 | |
62fa805f | 744 | // In N3290 is_destructible does not say anything about function |
2c7a09d7 | 745 | // types and abstract types, see LWG 2049. This implementation |
62fa805f DK |
746 | // describes function types as non-destructible and all complete |
747 | // object types as destructible, iff the explicit destructor | |
2c7a09d7 | 748 | // call expression is wellformed. |
62fa805f | 749 | struct __do_is_destructible_impl |
123c516a | 750 | { |
62fa805f | 751 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
123c516a PC |
752 | static true_type __test(int); |
753 | ||
754 | template<typename> | |
755 | static false_type __test(...); | |
756 | }; | |
53dc5044 PC |
757 | |
758 | template<typename _Tp> | |
62fa805f DK |
759 | struct __is_destructible_impl |
760 | : public __do_is_destructible_impl | |
123c516a PC |
761 | { |
762 | typedef decltype(__test<_Tp>(0)) type; | |
763 | }; | |
53dc5044 | 764 | |
62fa805f DK |
765 | template<typename _Tp, |
766 | bool = __or_<is_void<_Tp>, | |
767 | __is_array_unknown_bounds<_Tp>, | |
768 | is_function<_Tp>>::value, | |
769 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
770 | struct __is_destructible_safe; | |
771 | ||
772 | template<typename _Tp> | |
773 | struct __is_destructible_safe<_Tp, false, false> | |
774 | : public __is_destructible_impl<typename | |
775 | remove_all_extents<_Tp>::type>::type | |
776 | { }; | |
777 | ||
778 | template<typename _Tp> | |
779 | struct __is_destructible_safe<_Tp, true, false> | |
780 | : public false_type { }; | |
781 | ||
782 | template<typename _Tp> | |
783 | struct __is_destructible_safe<_Tp, false, true> | |
784 | : public true_type { }; | |
785 | ||
786 | /// is_destructible | |
787 | template<typename _Tp> | |
788 | struct is_destructible | |
82b12c4b | 789 | : public __is_destructible_safe<_Tp>::type |
62fa805f DK |
790 | { }; |
791 | ||
792 | // is_nothrow_destructible requires that is_destructible is | |
793 | // satisfied as well. We realize that by mimicing the | |
794 | // implementation of is_destructible but refer to noexcept(expr) | |
795 | // instead of decltype(expr). | |
796 | struct __do_is_nt_destructible_impl | |
123c516a | 797 | { |
62fa805f DK |
798 | template<typename _Tp> |
799 | static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())> | |
800 | __test(int); | |
123c516a PC |
801 | |
802 | template<typename> | |
803 | static false_type __test(...); | |
804 | }; | |
53dc5044 | 805 | |
53dc5044 | 806 | template<typename _Tp> |
62fa805f DK |
807 | struct __is_nt_destructible_impl |
808 | : public __do_is_nt_destructible_impl | |
123c516a PC |
809 | { |
810 | typedef decltype(__test<_Tp>(0)) type; | |
811 | }; | |
812 | ||
813 | template<typename _Tp, | |
814 | bool = __or_<is_void<_Tp>, | |
62fa805f DK |
815 | __is_array_unknown_bounds<_Tp>, |
816 | is_function<_Tp>>::value, | |
817 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
818 | struct __is_nt_destructible_safe; | |
53dc5044 PC |
819 | |
820 | template<typename _Tp> | |
62fa805f DK |
821 | struct __is_nt_destructible_safe<_Tp, false, false> |
822 | : public __is_nt_destructible_impl<typename | |
823 | remove_all_extents<_Tp>::type>::type | |
123c516a PC |
824 | { }; |
825 | ||
53dc5044 | 826 | template<typename _Tp> |
62fa805f | 827 | struct __is_nt_destructible_safe<_Tp, true, false> |
123c516a | 828 | : public false_type { }; |
53dc5044 PC |
829 | |
830 | template<typename _Tp> | |
62fa805f | 831 | struct __is_nt_destructible_safe<_Tp, false, true> |
123c516a PC |
832 | : public true_type { }; |
833 | ||
62fa805f | 834 | /// is_nothrow_destructible |
53dc5044 | 835 | template<typename _Tp> |
62fa805f | 836 | struct is_nothrow_destructible |
82b12c4b | 837 | : public __is_nt_destructible_safe<_Tp>::type |
123c516a PC |
838 | { }; |
839 | ||
840 | struct __do_is_default_constructible_impl | |
841 | { | |
842 | template<typename _Tp, typename = decltype(_Tp())> | |
843 | static true_type __test(int); | |
844 | ||
845 | template<typename> | |
846 | static false_type __test(...); | |
847 | }; | |
848 | ||
849 | template<typename _Tp> | |
850 | struct __is_default_constructible_impl | |
851 | : public __do_is_default_constructible_impl | |
53dc5044 | 852 | { |
123c516a | 853 | typedef decltype(__test<_Tp>(0)) type; |
53dc5044 | 854 | }; |
53dc5044 PC |
855 | |
856 | template<typename _Tp> | |
123c516a | 857 | struct __is_default_constructible_atom |
2c7a09d7 PC |
858 | : public __and_<__not_<is_void<_Tp>>, |
859 | __is_default_constructible_impl<_Tp>>::type | |
123c516a | 860 | { }; |
53dc5044 | 861 | |
123c516a PC |
862 | template<typename _Tp, bool = is_array<_Tp>::value> |
863 | struct __is_default_constructible_safe; | |
53dc5044 | 864 | |
2c7a09d7 PC |
865 | // The following technique is a workaround for a current core language |
866 | // restriction, which does not allow for array types to occur in | |
867 | // functional casts of the form T(). Complete arrays can be default- | |
868 | // constructed, if the element type is default-constructible, but | |
869 | // arrays with unknown bounds are not. | |
53dc5044 | 870 | template<typename _Tp> |
123c516a PC |
871 | struct __is_default_constructible_safe<_Tp, true> |
872 | : public __and_<__is_array_known_bounds<_Tp>, | |
873 | __is_default_constructible_atom<typename | |
2c7a09d7 | 874 | remove_all_extents<_Tp>::type>>::type |
53dc5044 PC |
875 | { }; |
876 | ||
53dc5044 | 877 | template<typename _Tp> |
123c516a PC |
878 | struct __is_default_constructible_safe<_Tp, false> |
879 | : public __is_default_constructible_atom<_Tp>::type | |
880 | { }; | |
4a27a739 | 881 | |
123c516a | 882 | /// is_default_constructible |
4a27a739 | 883 | template<typename _Tp> |
123c516a | 884 | struct is_default_constructible |
82b12c4b | 885 | : public __is_default_constructible_safe<_Tp>::type |
123c516a | 886 | { }; |
4a27a739 | 887 | |
2c7a09d7 PC |
888 | |
889 | // Implementation of is_constructible. | |
890 | ||
891 | // The hardest part of this trait is the binary direct-initialization | |
892 | // case, because we hit into a functional cast of the form T(arg). | |
893 | // This implementation uses different strategies depending on the | |
894 | // target type to reduce the test overhead as much as possible: | |
895 | // | |
896 | // a) For a reference target type, we use a static_cast expression | |
897 | // modulo its extra cases. | |
898 | // | |
899 | // b) For a non-reference target type we use a ::new expression. | |
123c516a PC |
900 | struct __do_is_static_castable_impl |
901 | { | |
902 | template<typename _From, typename _To, typename | |
903 | = decltype(static_cast<_To>(declval<_From>()))> | |
904 | static true_type __test(int); | |
4a27a739 | 905 | |
123c516a PC |
906 | template<typename, typename> |
907 | static false_type __test(...); | |
908 | }; | |
4a27a739 | 909 | |
123c516a PC |
910 | template<typename _From, typename _To> |
911 | struct __is_static_castable_impl | |
912 | : public __do_is_static_castable_impl | |
913 | { | |
914 | typedef decltype(__test<_From, _To>(0)) type; | |
915 | }; | |
939759fc | 916 | |
123c516a PC |
917 | template<typename _From, typename _To> |
918 | struct __is_static_castable_safe | |
2c7a09d7 | 919 | : public __is_static_castable_impl<_From, _To>::type |
4a27a739 PC |
920 | { }; |
921 | ||
123c516a PC |
922 | // __is_static_castable |
923 | template<typename _From, typename _To> | |
924 | struct __is_static_castable | |
925 | : public integral_constant<bool, (__is_static_castable_safe< | |
926 | _From, _To>::value)> | |
927 | { }; | |
939759fc | 928 | |
2c7a09d7 PC |
929 | // Implementation for non-reference types. To meet the proper |
930 | // variable definition semantics, we also need to test for | |
931 | // is_destructible in this case. | |
5db25ab1 DK |
932 | // This form should be simplified by a single expression: |
933 | // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. | |
123c516a PC |
934 | struct __do_is_direct_constructible_impl |
935 | { | |
936 | template<typename _Tp, typename _Arg, typename | |
937 | = decltype(::new _Tp(declval<_Arg>()))> | |
938 | static true_type __test(int); | |
4a27a739 | 939 | |
123c516a PC |
940 | template<typename, typename> |
941 | static false_type __test(...); | |
942 | }; | |
4a27a739 | 943 | |
123c516a PC |
944 | template<typename _Tp, typename _Arg> |
945 | struct __is_direct_constructible_impl | |
946 | : public __do_is_direct_constructible_impl | |
947 | { | |
948 | typedef decltype(__test<_Tp, _Arg>(0)) type; | |
949 | }; | |
4a27a739 | 950 | |
123c516a PC |
951 | template<typename _Tp, typename _Arg> |
952 | struct __is_direct_constructible_new_safe | |
953 | : public __and_<is_destructible<_Tp>, | |
2c7a09d7 | 954 | __is_direct_constructible_impl<_Tp, _Arg>>::type |
123c516a | 955 | { }; |
4a27a739 | 956 | |
123c516a PC |
957 | template<typename, typename> |
958 | struct is_same; | |
4a27a739 | 959 | |
123c516a PC |
960 | template<typename, typename> |
961 | struct is_base_of; | |
4a27a739 | 962 | |
123c516a PC |
963 | template<typename> |
964 | struct remove_reference; | |
4a27a739 | 965 | |
123c516a | 966 | template<typename _From, typename _To, bool |
5db25ab1 DK |
967 | = __not_<__or_<is_void<_From>, |
968 | is_function<_From>>>::value> | |
123c516a | 969 | struct __is_base_to_derived_ref; |
4a27a739 | 970 | |
5db25ab1 DK |
971 | // Detect whether we have a downcast situation during |
972 | // reference binding. | |
123c516a PC |
973 | template<typename _From, typename _To> |
974 | struct __is_base_to_derived_ref<_From, _To, true> | |
975 | { | |
976 | typedef typename remove_cv<typename remove_reference<_From | |
977 | >::type>::type __src_t; | |
978 | typedef typename remove_cv<typename remove_reference<_To | |
979 | >::type>::type __dst_t; | |
2c7a09d7 PC |
980 | typedef __and_<__not_<is_same<__src_t, __dst_t>>, |
981 | is_base_of<__src_t, __dst_t>> type; | |
123c516a PC |
982 | static constexpr bool value = type::value; |
983 | }; | |
4a27a739 | 984 | |
123c516a PC |
985 | template<typename _From, typename _To> |
986 | struct __is_base_to_derived_ref<_From, _To, false> | |
987 | : public false_type | |
4a27a739 PC |
988 | { }; |
989 | ||
123c516a PC |
990 | template<typename _From, typename _To, bool |
991 | = __and_<is_lvalue_reference<_From>, | |
992 | is_rvalue_reference<_To>>::value> | |
993 | struct __is_lvalue_to_rvalue_ref; | |
e133ace8 | 994 | |
5db25ab1 DK |
995 | // Detect whether we have an lvalue of non-function type |
996 | // bound to a reference-compatible rvalue-reference. | |
123c516a PC |
997 | template<typename _From, typename _To> |
998 | struct __is_lvalue_to_rvalue_ref<_From, _To, true> | |
999 | { | |
1000 | typedef typename remove_cv<typename remove_reference< | |
1001 | _From>::type>::type __src_t; | |
1002 | typedef typename remove_cv<typename remove_reference< | |
1003 | _To>::type>::type __dst_t; | |
5db25ab1 DK |
1004 | typedef __and_<__not_<is_function<__src_t>>, |
1005 | __or_<is_same<__src_t, __dst_t>, | |
1006 | is_base_of<__dst_t, __src_t>>> type; | |
123c516a PC |
1007 | static constexpr bool value = type::value; |
1008 | }; | |
e133ace8 | 1009 | |
123c516a PC |
1010 | template<typename _From, typename _To> |
1011 | struct __is_lvalue_to_rvalue_ref<_From, _To, false> | |
1012 | : public false_type | |
e133ace8 PC |
1013 | { }; |
1014 | ||
2c7a09d7 PC |
1015 | // Here we handle direct-initialization to a reference type as |
1016 | // equivalent to a static_cast modulo overshooting conversions. | |
1017 | // These are restricted to the following conversions: | |
5db25ab1 | 1018 | // a) A base class value to a derived class reference |
2c7a09d7 | 1019 | // b) An lvalue to an rvalue-reference of reference-compatible |
5db25ab1 | 1020 | // types that are not functions |
123c516a PC |
1021 | template<typename _Tp, typename _Arg> |
1022 | struct __is_direct_constructible_ref_cast | |
1023 | : public __and_<__is_static_castable<_Arg, _Tp>, | |
1024 | __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, | |
1025 | __is_lvalue_to_rvalue_ref<_Arg, _Tp> | |
2c7a09d7 | 1026 | >>>::type |
e133ace8 PC |
1027 | { }; |
1028 | ||
123c516a PC |
1029 | template<typename _Tp, typename _Arg> |
1030 | struct __is_direct_constructible_new | |
1031 | : public conditional<is_reference<_Tp>::value, | |
1032 | __is_direct_constructible_ref_cast<_Tp, _Arg>, | |
1033 | __is_direct_constructible_new_safe<_Tp, _Arg> | |
1034 | >::type | |
b0302c68 PC |
1035 | { }; |
1036 | ||
123c516a PC |
1037 | template<typename _Tp, typename _Arg> |
1038 | struct __is_direct_constructible | |
82b12c4b | 1039 | : public __is_direct_constructible_new<_Tp, _Arg>::type |
e133ace8 PC |
1040 | { }; |
1041 | ||
2c7a09d7 PC |
1042 | // Since default-construction and binary direct-initialization have |
1043 | // been handled separately, the implementation of the remaining | |
5db25ab1 DK |
1044 | // n-ary construction cases is rather straightforward. We can use |
1045 | // here a functional cast, because array types are excluded anyway | |
1046 | // and this form is never interpreted as a C cast. | |
123c516a PC |
1047 | struct __do_is_nary_constructible_impl |
1048 | { | |
1049 | template<typename _Tp, typename... _Args, typename | |
1050 | = decltype(_Tp(declval<_Args>()...))> | |
1051 | static true_type __test(int); | |
2b08f2c5 | 1052 | |
123c516a PC |
1053 | template<typename, typename...> |
1054 | static false_type __test(...); | |
1055 | }; | |
b0302c68 PC |
1056 | |
1057 | template<typename _Tp, typename... _Args> | |
123c516a PC |
1058 | struct __is_nary_constructible_impl |
1059 | : public __do_is_nary_constructible_impl | |
b0302c68 | 1060 | { |
123c516a | 1061 | typedef decltype(__test<_Tp, _Args...>(0)) type; |
b0302c68 PC |
1062 | }; |
1063 | ||
123c516a PC |
1064 | template<typename _Tp, typename... _Args> |
1065 | struct __is_nary_constructible | |
2c7a09d7 | 1066 | : public __is_nary_constructible_impl<_Tp, _Args...>::type |
b0302c68 | 1067 | { |
123c516a PC |
1068 | static_assert(sizeof...(_Args) > 1, |
1069 | "Only useful for > 1 arguments"); | |
1070 | }; | |
b0302c68 | 1071 | |
123c516a PC |
1072 | template<typename _Tp, typename... _Args> |
1073 | struct __is_constructible_impl | |
1074 | : public __is_nary_constructible<_Tp, _Args...> | |
1075 | { }; | |
b0302c68 | 1076 | |
123c516a PC |
1077 | template<typename _Tp, typename _Arg> |
1078 | struct __is_constructible_impl<_Tp, _Arg> | |
1079 | : public __is_direct_constructible<_Tp, _Arg> | |
1080 | { }; | |
1081 | ||
1082 | template<typename _Tp> | |
1083 | struct __is_constructible_impl<_Tp> | |
1084 | : public is_default_constructible<_Tp> | |
1085 | { }; | |
b0302c68 PC |
1086 | |
1087 | /// is_constructible | |
b0302c68 PC |
1088 | template<typename _Tp, typename... _Args> |
1089 | struct is_constructible | |
82b12c4b | 1090 | : public __is_constructible_impl<_Tp, _Args...>::type |
c32097d8 JM |
1091 | { }; |
1092 | ||
89898034 | 1093 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd | 1094 | struct __is_copy_constructible_impl; |
123c516a | 1095 | |
65cee9bd | 1096 | template<typename _Tp> |
89898034 | 1097 | struct __is_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1098 | : public false_type { }; |
1099 | ||
1100 | template<typename _Tp> | |
89898034 | 1101 | struct __is_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1102 | : public is_constructible<_Tp, const _Tp&> |
1103 | { }; | |
1104 | ||
1105 | /// is_copy_constructible | |
1106 | template<typename _Tp> | |
1107 | struct is_copy_constructible | |
1108 | : public __is_copy_constructible_impl<_Tp> | |
1109 | { }; | |
1110 | ||
89898034 | 1111 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1112 | struct __is_move_constructible_impl; |
1113 | ||
1114 | template<typename _Tp> | |
89898034 | 1115 | struct __is_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1116 | : public false_type { }; |
1117 | ||
1118 | template<typename _Tp> | |
89898034 | 1119 | struct __is_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1120 | : public is_constructible<_Tp, _Tp&&> |
1121 | { }; | |
1122 | ||
1123 | /// is_move_constructible | |
1124 | template<typename _Tp> | |
1125 | struct is_move_constructible | |
1126 | : public __is_move_constructible_impl<_Tp> | |
1127 | { }; | |
1128 | ||
1129 | template<typename _Tp> | |
1130 | struct __is_nt_default_constructible_atom | |
1131 | : public integral_constant<bool, noexcept(_Tp())> | |
1132 | { }; | |
1133 | ||
1134 | template<typename _Tp, bool = is_array<_Tp>::value> | |
1135 | struct __is_nt_default_constructible_impl; | |
1136 | ||
1137 | template<typename _Tp> | |
1138 | struct __is_nt_default_constructible_impl<_Tp, true> | |
1139 | : public __and_<__is_array_known_bounds<_Tp>, | |
1140 | __is_nt_default_constructible_atom<typename | |
1141 | remove_all_extents<_Tp>::type>>::type | |
1142 | { }; | |
1143 | ||
1144 | template<typename _Tp> | |
1145 | struct __is_nt_default_constructible_impl<_Tp, false> | |
1146 | : public __is_nt_default_constructible_atom<_Tp> | |
1147 | { }; | |
1148 | ||
1149 | /// is_nothrow_default_constructible | |
1150 | template<typename _Tp> | |
1151 | struct is_nothrow_default_constructible | |
1152 | : public __and_<is_default_constructible<_Tp>, | |
1153 | __is_nt_default_constructible_impl<_Tp>>::type | |
1154 | { }; | |
e4f32cb0 PC |
1155 | |
1156 | template<typename _Tp, typename... _Args> | |
65cee9bd PC |
1157 | struct __is_nt_constructible_impl |
1158 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
1159 | { }; | |
e4f32cb0 PC |
1160 | |
1161 | template<typename _Tp, typename _Arg> | |
65cee9bd PC |
1162 | struct __is_nt_constructible_impl<_Tp, _Arg> |
1163 | : public integral_constant<bool, | |
1164 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
1165 | { }; | |
1166 | ||
1167 | template<typename _Tp> | |
1168 | struct __is_nt_constructible_impl<_Tp> | |
1169 | : public is_nothrow_default_constructible<_Tp> | |
1170 | { }; | |
e4f32cb0 PC |
1171 | |
1172 | /// is_nothrow_constructible | |
1173 | template<typename _Tp, typename... _Args> | |
1174 | struct is_nothrow_constructible | |
65cee9bd PC |
1175 | : public __and_<is_constructible<_Tp, _Args...>, |
1176 | __is_nt_constructible_impl<_Tp, _Args...>>::type | |
1177 | { }; | |
1178 | ||
89898034 | 1179 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1180 | struct __is_nothrow_copy_constructible_impl; |
1181 | ||
1182 | template<typename _Tp> | |
89898034 | 1183 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1184 | : public false_type { }; |
1185 | ||
1186 | template<typename _Tp> | |
89898034 | 1187 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1188 | : public is_nothrow_constructible<_Tp, const _Tp&> |
1189 | { }; | |
1190 | ||
1191 | /// is_nothrow_copy_constructible | |
1192 | template<typename _Tp> | |
1193 | struct is_nothrow_copy_constructible | |
1194 | : public __is_nothrow_copy_constructible_impl<_Tp> | |
1195 | { }; | |
1196 | ||
89898034 | 1197 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1198 | struct __is_nothrow_move_constructible_impl; |
1199 | ||
1200 | template<typename _Tp> | |
89898034 | 1201 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1202 | : public false_type { }; |
1203 | ||
1204 | template<typename _Tp> | |
89898034 | 1205 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1206 | : public is_nothrow_constructible<_Tp, _Tp&&> |
1207 | { }; | |
1208 | ||
1209 | /// is_nothrow_move_constructible | |
1210 | template<typename _Tp> | |
1211 | struct is_nothrow_move_constructible | |
1212 | : public __is_nothrow_move_constructible_impl<_Tp> | |
1213 | { }; | |
1214 | ||
f263981a PC |
1215 | template<typename _Tp, typename _Up> |
1216 | class __is_assignable_helper | |
f263981a | 1217 | { |
82b12c4b FD |
1218 | template<typename _Tp1, typename _Up1, |
1219 | typename = decltype(declval<_Tp1>() = declval<_Up1>())> | |
1220 | static true_type | |
f263981a PC |
1221 | __test(int); |
1222 | ||
1223 | template<typename, typename> | |
82b12c4b FD |
1224 | static false_type |
1225 | __test(...); | |
f263981a PC |
1226 | |
1227 | public: | |
82b12c4b | 1228 | typedef decltype(__test<_Tp, _Up>(0)) type; |
f263981a PC |
1229 | }; |
1230 | ||
1231 | /// is_assignable | |
1232 | template<typename _Tp, typename _Up> | |
1233 | struct is_assignable | |
82b12c4b | 1234 | : public __is_assignable_helper<_Tp, _Up>::type |
f263981a PC |
1235 | { }; |
1236 | ||
89898034 | 1237 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1238 | struct __is_copy_assignable_impl; |
1239 | ||
1240 | template<typename _Tp> | |
89898034 | 1241 | struct __is_copy_assignable_impl<_Tp, false> |
f263981a PC |
1242 | : public false_type { }; |
1243 | ||
1244 | template<typename _Tp> | |
89898034 | 1245 | struct __is_copy_assignable_impl<_Tp, true> |
9b3a81da | 1246 | : public is_assignable<_Tp&, const _Tp&> |
f263981a PC |
1247 | { }; |
1248 | ||
1249 | /// is_copy_assignable | |
1250 | template<typename _Tp> | |
1251 | struct is_copy_assignable | |
1252 | : public __is_copy_assignable_impl<_Tp> | |
1253 | { }; | |
1254 | ||
89898034 | 1255 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1256 | struct __is_move_assignable_impl; |
1257 | ||
1258 | template<typename _Tp> | |
89898034 | 1259 | struct __is_move_assignable_impl<_Tp, false> |
f263981a PC |
1260 | : public false_type { }; |
1261 | ||
1262 | template<typename _Tp> | |
89898034 | 1263 | struct __is_move_assignable_impl<_Tp, true> |
f263981a PC |
1264 | : public is_assignable<_Tp&, _Tp&&> |
1265 | { }; | |
1266 | ||
1267 | /// is_move_assignable | |
1268 | template<typename _Tp> | |
1269 | struct is_move_assignable | |
1270 | : public __is_move_assignable_impl<_Tp> | |
1271 | { }; | |
1272 | ||
1273 | template<typename _Tp, typename _Up> | |
1274 | struct __is_nt_assignable_impl | |
1275 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1276 | { }; | |
1277 | ||
1278 | /// is_nothrow_assignable | |
1279 | template<typename _Tp, typename _Up> | |
1280 | struct is_nothrow_assignable | |
1281 | : public __and_<is_assignable<_Tp, _Up>, | |
1282 | __is_nt_assignable_impl<_Tp, _Up>>::type | |
1283 | { }; | |
1284 | ||
89898034 | 1285 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1286 | struct __is_nt_copy_assignable_impl; |
1287 | ||
1288 | template<typename _Tp> | |
89898034 | 1289 | struct __is_nt_copy_assignable_impl<_Tp, false> |
f263981a PC |
1290 | : public false_type { }; |
1291 | ||
1292 | template<typename _Tp> | |
89898034 | 1293 | struct __is_nt_copy_assignable_impl<_Tp, true> |
9b3a81da | 1294 | : public is_nothrow_assignable<_Tp&, const _Tp&> |
f263981a PC |
1295 | { }; |
1296 | ||
1297 | /// is_nothrow_copy_assignable | |
1298 | template<typename _Tp> | |
1299 | struct is_nothrow_copy_assignable | |
1300 | : public __is_nt_copy_assignable_impl<_Tp> | |
1301 | { }; | |
1302 | ||
89898034 | 1303 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1304 | struct __is_nt_move_assignable_impl; |
1305 | ||
1306 | template<typename _Tp> | |
89898034 | 1307 | struct __is_nt_move_assignable_impl<_Tp, false> |
f263981a PC |
1308 | : public false_type { }; |
1309 | ||
1310 | template<typename _Tp> | |
89898034 | 1311 | struct __is_nt_move_assignable_impl<_Tp, true> |
f263981a PC |
1312 | : public is_nothrow_assignable<_Tp&, _Tp&&> |
1313 | { }; | |
1314 | ||
1315 | /// is_nothrow_move_assignable | |
65cee9bd | 1316 | template<typename _Tp> |
f263981a PC |
1317 | struct is_nothrow_move_assignable |
1318 | : public __is_nt_move_assignable_impl<_Tp> | |
e4f32cb0 PC |
1319 | { }; |
1320 | ||
f5e523b7 VV |
1321 | /// is_trivially_constructible |
1322 | template<typename _Tp, typename... _Args> | |
1323 | struct is_trivially_constructible | |
1324 | : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool, | |
1325 | __is_trivially_constructible(_Tp, _Args...)>>::type | |
1326 | { }; | |
6a9ecd34 | 1327 | |
f5e523b7 VV |
1328 | /// is_trivially_default_constructible |
1329 | template<typename _Tp> | |
1330 | struct is_trivially_default_constructible | |
1331 | : public is_trivially_constructible<_Tp>::type | |
1332 | { }; | |
6a9ecd34 | 1333 | |
f5e523b7 VV |
1334 | /// is_trivially_copy_constructible |
1335 | template<typename _Tp> | |
1336 | struct is_trivially_copy_constructible | |
1337 | : public __and_<is_copy_constructible<_Tp>, | |
1338 | integral_constant<bool, | |
1339 | __is_trivially_constructible(_Tp, const _Tp&)>>::type | |
1340 | { }; | |
1341 | ||
1342 | /// is_trivially_move_constructible | |
1343 | template<typename _Tp> | |
1344 | struct is_trivially_move_constructible | |
1345 | : public __and_<is_move_constructible<_Tp>, | |
1346 | integral_constant<bool, | |
1347 | __is_trivially_constructible(_Tp, _Tp&&)>>::type | |
1348 | { }; | |
6a9ecd34 | 1349 | |
f5e523b7 VV |
1350 | /// is_trivially_assignable |
1351 | template<typename _Tp, typename _Up> | |
1352 | struct is_trivially_assignable | |
1353 | : public __and_<is_assignable<_Tp, _Up>, | |
1354 | integral_constant<bool, | |
1355 | __is_trivially_assignable(_Tp, _Up)>>::type | |
1356 | { }; | |
6a9ecd34 | 1357 | |
f5e523b7 VV |
1358 | /// is_trivially_copy_assignable |
1359 | template<typename _Tp> | |
1360 | struct is_trivially_copy_assignable | |
1361 | : public __and_<is_copy_assignable<_Tp>, | |
1362 | integral_constant<bool, | |
1363 | __is_trivially_assignable(_Tp&, const _Tp&)>>::type | |
1364 | { }; | |
6a9ecd34 | 1365 | |
f5e523b7 VV |
1366 | /// is_trivially_move_assignable |
1367 | template<typename _Tp> | |
1368 | struct is_trivially_move_assignable | |
1369 | : public __and_<is_move_assignable<_Tp>, | |
1370 | integral_constant<bool, | |
1371 | __is_trivially_assignable(_Tp&, _Tp&&)>>::type | |
1372 | { }; | |
6a9ecd34 PC |
1373 | |
1374 | /// is_trivially_destructible | |
1375 | template<typename _Tp> | |
1376 | struct is_trivially_destructible | |
1377 | : public __and_<is_destructible<_Tp>, integral_constant<bool, | |
1378 | __has_trivial_destructor(_Tp)>>::type | |
1379 | { }; | |
1380 | ||
1381 | /// has_trivial_default_constructor (temporary legacy) | |
e133ace8 PC |
1382 | template<typename _Tp> |
1383 | struct has_trivial_default_constructor | |
1384 | : public integral_constant<bool, __has_trivial_constructor(_Tp)> | |
1385 | { }; | |
1386 | ||
6a9ecd34 | 1387 | /// has_trivial_copy_constructor (temporary legacy) |
e133ace8 PC |
1388 | template<typename _Tp> |
1389 | struct has_trivial_copy_constructor | |
1390 | : public integral_constant<bool, __has_trivial_copy(_Tp)> | |
1391 | { }; | |
1392 | ||
6a9ecd34 | 1393 | /// has_trivial_copy_assign (temporary legacy) |
e133ace8 | 1394 | template<typename _Tp> |
6f5e9b8d | 1395 | struct has_trivial_copy_assign |
e133ace8 PC |
1396 | : public integral_constant<bool, __has_trivial_assign(_Tp)> |
1397 | { }; | |
1398 | ||
123c516a PC |
1399 | /// has_virtual_destructor |
1400 | template<typename _Tp> | |
1401 | struct has_virtual_destructor | |
1402 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
1403 | { }; | |
1404 | ||
1405 | ||
1406 | // type property queries. | |
1407 | ||
1408 | /// alignment_of | |
1409 | template<typename _Tp> | |
1410 | struct alignment_of | |
1411 | : public integral_constant<std::size_t, __alignof__(_Tp)> { }; | |
1412 | ||
1413 | /// rank | |
1414 | template<typename> | |
1415 | struct rank | |
1416 | : public integral_constant<std::size_t, 0> { }; | |
1417 | ||
1418 | template<typename _Tp, std::size_t _Size> | |
1419 | struct rank<_Tp[_Size]> | |
1420 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1421 | ||
1422 | template<typename _Tp> | |
1423 | struct rank<_Tp[]> | |
1424 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1425 | ||
1426 | /// extent | |
1427 | template<typename, unsigned _Uint> | |
1428 | struct extent | |
1429 | : public integral_constant<std::size_t, 0> { }; | |
1430 | ||
1431 | template<typename _Tp, unsigned _Uint, std::size_t _Size> | |
1432 | struct extent<_Tp[_Size], _Uint> | |
1433 | : public integral_constant<std::size_t, | |
1434 | _Uint == 0 ? _Size : extent<_Tp, | |
1435 | _Uint - 1>::value> | |
1436 | { }; | |
1437 | ||
1438 | template<typename _Tp, unsigned _Uint> | |
1439 | struct extent<_Tp[], _Uint> | |
1440 | : public integral_constant<std::size_t, | |
1441 | _Uint == 0 ? 0 : extent<_Tp, | |
1442 | _Uint - 1>::value> | |
1443 | { }; | |
1444 | ||
1445 | ||
c0ffa2ba | 1446 | // Type relations. |
123c516a PC |
1447 | |
1448 | /// is_same | |
1449 | template<typename, typename> | |
1450 | struct is_same | |
1451 | : public false_type { }; | |
1452 | ||
1453 | template<typename _Tp> | |
1454 | struct is_same<_Tp, _Tp> | |
1455 | : public true_type { }; | |
b0302c68 | 1456 | |
939759fc | 1457 | /// is_base_of |
e133ace8 PC |
1458 | template<typename _Base, typename _Derived> |
1459 | struct is_base_of | |
1460 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1461 | { }; | |
1462 | ||
297f34d7 | 1463 | template<typename _From, typename _To, |
123c516a PC |
1464 | bool = __or_<is_void<_From>, is_function<_To>, |
1465 | is_array<_To>>::value> | |
297f34d7 | 1466 | struct __is_convertible_helper |
82b12c4b | 1467 | { typedef typename is_void<_To>::type type; }; |
297f34d7 | 1468 | |
e133ace8 | 1469 | template<typename _From, typename _To> |
b0302c68 | 1470 | class __is_convertible_helper<_From, _To, false> |
e133ace8 | 1471 | { |
82b12c4b FD |
1472 | template<typename _To1> |
1473 | static void __test_aux(_To1); | |
8e7d962a | 1474 | |
82b12c4b FD |
1475 | template<typename _From1, typename _To1, |
1476 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1477 | static true_type | |
8e7d962a PC |
1478 | __test(int); |
1479 | ||
1480 | template<typename, typename> | |
82b12c4b FD |
1481 | static false_type |
1482 | __test(...); | |
297f34d7 | 1483 | |
e133ace8 | 1484 | public: |
82b12c4b | 1485 | typedef decltype(__test<_From, _To>(0)) type; |
e133ace8 PC |
1486 | }; |
1487 | ||
82b12c4b | 1488 | |
b0302c68 | 1489 | /// is_convertible |
e133ace8 PC |
1490 | template<typename _From, typename _To> |
1491 | struct is_convertible | |
82b12c4b | 1492 | : public __is_convertible_helper<_From, _To>::type |
e133ace8 PC |
1493 | { }; |
1494 | ||
fd735b6a | 1495 | |
c0ffa2ba | 1496 | // Const-volatile modifications. |
7b50cdef | 1497 | |
123c516a | 1498 | /// remove_const |
7b50cdef | 1499 | template<typename _Tp> |
123c516a PC |
1500 | struct remove_const |
1501 | { typedef _Tp type; }; | |
7b50cdef | 1502 | |
123c516a PC |
1503 | template<typename _Tp> |
1504 | struct remove_const<_Tp const> | |
1505 | { typedef _Tp type; }; | |
1506 | ||
1507 | /// remove_volatile | |
1508 | template<typename _Tp> | |
1509 | struct remove_volatile | |
1510 | { typedef _Tp type; }; | |
7b50cdef | 1511 | |
123c516a PC |
1512 | template<typename _Tp> |
1513 | struct remove_volatile<_Tp volatile> | |
1514 | { typedef _Tp type; }; | |
1515 | ||
1516 | /// remove_cv | |
1517 | template<typename _Tp> | |
1518 | struct remove_cv | |
1519 | { | |
1520 | typedef typename | |
1521 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1522 | }; | |
1523 | ||
1524 | /// add_const | |
1525 | template<typename _Tp> | |
1526 | struct add_const | |
1527 | { typedef _Tp const type; }; | |
1528 | ||
1529 | /// add_volatile | |
1530 | template<typename _Tp> | |
1531 | struct add_volatile | |
1532 | { typedef _Tp volatile type; }; | |
1533 | ||
1534 | /// add_cv | |
1535 | template<typename _Tp> | |
1536 | struct add_cv | |
1537 | { | |
1538 | typedef typename | |
1539 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1540 | }; | |
7b50cdef | 1541 | |
4457e88c | 1542 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
1543 | |
1544 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1545 | ||
4457e88c JW |
1546 | /// Alias template for remove_const |
1547 | template<typename _Tp> | |
1548 | using remove_const_t = typename remove_const<_Tp>::type; | |
1549 | ||
1550 | /// Alias template for remove_volatile | |
1551 | template<typename _Tp> | |
1552 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1553 | ||
1554 | /// Alias template for remove_cv | |
1555 | template<typename _Tp> | |
1556 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1557 | ||
1558 | /// Alias template for add_const | |
1559 | template<typename _Tp> | |
1560 | using add_const_t = typename add_const<_Tp>::type; | |
1561 | ||
1562 | /// Alias template for add_volatile | |
1563 | template<typename _Tp> | |
1564 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1565 | ||
1566 | /// Alias template for add_cv | |
1567 | template<typename _Tp> | |
1568 | using add_cv_t = typename add_cv<_Tp>::type; | |
1569 | #endif | |
7b50cdef | 1570 | |
123c516a | 1571 | // Reference transformations. |
7b50cdef | 1572 | |
123c516a PC |
1573 | /// remove_reference |
1574 | template<typename _Tp> | |
1575 | struct remove_reference | |
1576 | { typedef _Tp type; }; | |
7b50cdef | 1577 | |
123c516a PC |
1578 | template<typename _Tp> |
1579 | struct remove_reference<_Tp&> | |
1580 | { typedef _Tp type; }; | |
7b50cdef | 1581 | |
123c516a PC |
1582 | template<typename _Tp> |
1583 | struct remove_reference<_Tp&&> | |
1584 | { typedef _Tp type; }; | |
1585 | ||
89898034 | 1586 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1587 | struct __add_lvalue_reference_helper |
1588 | { typedef _Tp type; }; | |
7b50cdef | 1589 | |
5e108459 | 1590 | template<typename _Tp> |
89898034 | 1591 | struct __add_lvalue_reference_helper<_Tp, true> |
123c516a | 1592 | { typedef _Tp& type; }; |
5e108459 | 1593 | |
123c516a | 1594 | /// add_lvalue_reference |
5e108459 | 1595 | template<typename _Tp> |
123c516a PC |
1596 | struct add_lvalue_reference |
1597 | : public __add_lvalue_reference_helper<_Tp> | |
1598 | { }; | |
1599 | ||
89898034 | 1600 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1601 | struct __add_rvalue_reference_helper |
1602 | { typedef _Tp type; }; | |
5e108459 PC |
1603 | |
1604 | template<typename _Tp> | |
123c516a PC |
1605 | struct __add_rvalue_reference_helper<_Tp, true> |
1606 | { typedef _Tp&& type; }; | |
5e108459 | 1607 | |
123c516a | 1608 | /// add_rvalue_reference |
5e108459 | 1609 | template<typename _Tp> |
123c516a PC |
1610 | struct add_rvalue_reference |
1611 | : public __add_rvalue_reference_helper<_Tp> | |
1612 | { }; | |
5e108459 | 1613 | |
4457e88c JW |
1614 | #if __cplusplus > 201103L |
1615 | /// Alias template for remove_reference | |
1616 | template<typename _Tp> | |
1617 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1618 | ||
1619 | /// Alias template for add_lvalue_reference | |
1620 | template<typename _Tp> | |
1621 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1622 | ||
1623 | /// Alias template for add_rvalue_reference | |
1624 | template<typename _Tp> | |
1625 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1626 | #endif | |
7b50cdef | 1627 | |
c0ffa2ba | 1628 | // Sign modifications. |
123c516a | 1629 | |
7b50cdef BK |
1630 | // Utility for constructing identically cv-qualified types. |
1631 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1632 | struct __cv_selector; | |
1633 | ||
1634 | template<typename _Unqualified> | |
1635 | struct __cv_selector<_Unqualified, false, false> | |
1636 | { typedef _Unqualified __type; }; | |
1637 | ||
1638 | template<typename _Unqualified> | |
1639 | struct __cv_selector<_Unqualified, false, true> | |
1640 | { typedef volatile _Unqualified __type; }; | |
1641 | ||
1642 | template<typename _Unqualified> | |
1643 | struct __cv_selector<_Unqualified, true, false> | |
1644 | { typedef const _Unqualified __type; }; | |
1645 | ||
1646 | template<typename _Unqualified> | |
1647 | struct __cv_selector<_Unqualified, true, true> | |
1648 | { typedef const volatile _Unqualified __type; }; | |
1649 | ||
1650 | template<typename _Qualified, typename _Unqualified, | |
1651 | bool _IsConst = is_const<_Qualified>::value, | |
1652 | bool _IsVol = is_volatile<_Qualified>::value> | |
b0302c68 | 1653 | class __match_cv_qualifiers |
7b50cdef | 1654 | { |
7b50cdef BK |
1655 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1656 | ||
1657 | public: | |
1658 | typedef typename __match::__type __type; | |
1659 | }; | |
1660 | ||
7b50cdef BK |
1661 | // Utility for finding the unsigned versions of signed integral types. |
1662 | template<typename _Tp> | |
e133ace8 PC |
1663 | struct __make_unsigned |
1664 | { typedef _Tp __type; }; | |
7b50cdef BK |
1665 | |
1666 | template<> | |
1667 | struct __make_unsigned<char> | |
1668 | { typedef unsigned char __type; }; | |
1669 | ||
1670 | template<> | |
1671 | struct __make_unsigned<signed char> | |
1672 | { typedef unsigned char __type; }; | |
1673 | ||
7b50cdef BK |
1674 | template<> |
1675 | struct __make_unsigned<short> | |
1676 | { typedef unsigned short __type; }; | |
1677 | ||
1678 | template<> | |
1679 | struct __make_unsigned<int> | |
1680 | { typedef unsigned int __type; }; | |
1681 | ||
1682 | template<> | |
1683 | struct __make_unsigned<long> | |
1684 | { typedef unsigned long __type; }; | |
1685 | ||
1686 | template<> | |
1687 | struct __make_unsigned<long long> | |
1688 | { typedef unsigned long long __type; }; | |
1689 | ||
c0eef1c8 JW |
1690 | #if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__) |
1691 | template<> | |
1692 | struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__> | |
1693 | { }; | |
1694 | #endif | |
1695 | ||
78a7c317 DD |
1696 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1697 | template<> | |
1698 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1699 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1700 | #endif | |
1701 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1702 | template<> | |
1703 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1704 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1705 | #endif | |
1706 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
6d585f01 | 1707 | template<> |
78a7c317 DD |
1708 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1709 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1710 | #endif | |
1711 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1712 | template<> | |
1713 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1714 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1715 | #endif |
1716 | ||
7b50cdef BK |
1717 | // Select between integral and enum: not possible to be both. |
1718 | template<typename _Tp, | |
1719 | bool _IsInt = is_integral<_Tp>::value, | |
7b50cdef | 1720 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1721 | class __make_unsigned_selector; |
1722 | ||
7b50cdef | 1723 | template<typename _Tp> |
b0302c68 | 1724 | class __make_unsigned_selector<_Tp, true, false> |
7b50cdef | 1725 | { |
7b50cdef BK |
1726 | typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; |
1727 | typedef typename __unsignedt::__type __unsigned_type; | |
1728 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1729 | ||
1730 | public: | |
1731 | typedef typename __cv_unsigned::__type __type; | |
1732 | }; | |
1733 | ||
7b50cdef | 1734 | template<typename _Tp> |
b0302c68 | 1735 | class __make_unsigned_selector<_Tp, false, true> |
7b50cdef | 1736 | { |
a0230468 MM |
1737 | // With -fshort-enums, an enum may be as small as a char. |
1738 | typedef unsigned char __smallest; | |
1739 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); | |
1740 | static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); | |
ce2e6349 | 1741 | static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); |
a0230468 MM |
1742 | typedef conditional<__b2, unsigned int, unsigned long> __cond2; |
1743 | typedef typename __cond2::type __cond2_type; | |
1744 | typedef conditional<__b1, unsigned short, __cond2_type> __cond1; | |
1745 | typedef typename __cond1::type __cond1_type; | |
7b50cdef BK |
1746 | |
1747 | public: | |
a0230468 | 1748 | typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; |
7b50cdef BK |
1749 | }; |
1750 | ||
7b50cdef BK |
1751 | // Given an integral/enum type, return the corresponding unsigned |
1752 | // integer type. | |
5b9daa7e BK |
1753 | // Primary template. |
1754 | /// make_unsigned | |
7b50cdef BK |
1755 | template<typename _Tp> |
1756 | struct make_unsigned | |
1757 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; | |
1758 | ||
1759 | // Integral, but don't define. | |
1760 | template<> | |
1761 | struct make_unsigned<bool>; | |
1762 | ||
1763 | ||
1764 | // Utility for finding the signed versions of unsigned integral types. | |
1765 | template<typename _Tp> | |
e133ace8 PC |
1766 | struct __make_signed |
1767 | { typedef _Tp __type; }; | |
7b50cdef BK |
1768 | |
1769 | template<> | |
1770 | struct __make_signed<char> | |
1771 | { typedef signed char __type; }; | |
1772 | ||
1773 | template<> | |
1774 | struct __make_signed<unsigned char> | |
1775 | { typedef signed char __type; }; | |
1776 | ||
7b50cdef BK |
1777 | template<> |
1778 | struct __make_signed<unsigned short> | |
1779 | { typedef signed short __type; }; | |
1780 | ||
1781 | template<> | |
1782 | struct __make_signed<unsigned int> | |
1783 | { typedef signed int __type; }; | |
1784 | ||
1785 | template<> | |
1786 | struct __make_signed<unsigned long> | |
1787 | { typedef signed long __type; }; | |
1788 | ||
1789 | template<> | |
1790 | struct __make_signed<unsigned long long> | |
1791 | { typedef signed long long __type; }; | |
1792 | ||
c0eef1c8 JW |
1793 | #if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__) |
1794 | template<> | |
1795 | struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__> | |
1796 | { }; | |
1797 | #endif | |
1798 | ||
1799 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
1800 | template<> | |
1801 | struct __make_signed<char16_t> : __make_signed<uint_least16_t> | |
1802 | { }; | |
1803 | template<> | |
1804 | struct __make_signed<char32_t> : __make_signed<uint_least32_t> | |
1805 | { }; | |
1806 | #endif | |
1807 | ||
78a7c317 DD |
1808 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1809 | template<> | |
1810 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1811 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1812 | #endif | |
1813 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1814 | template<> | |
1815 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1816 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1817 | #endif | |
1818 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1819 | template<> | |
1820 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1821 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1822 | #endif | |
1823 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
6d585f01 | 1824 | template<> |
78a7c317 DD |
1825 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1826 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1827 | #endif |
1828 | ||
fb8ffd10 | 1829 | // Select between integral and enum: not possible to be both. |
7b50cdef BK |
1830 | template<typename _Tp, |
1831 | bool _IsInt = is_integral<_Tp>::value, | |
7b50cdef | 1832 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1833 | class __make_signed_selector; |
1834 | ||
7b50cdef | 1835 | template<typename _Tp> |
b0302c68 | 1836 | class __make_signed_selector<_Tp, true, false> |
7b50cdef | 1837 | { |
7b50cdef BK |
1838 | typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; |
1839 | typedef typename __signedt::__type __signed_type; | |
1840 | typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; | |
1841 | ||
1842 | public: | |
1843 | typedef typename __cv_signed::__type __type; | |
1844 | }; | |
1845 | ||
7b50cdef | 1846 | template<typename _Tp> |
b0302c68 | 1847 | class __make_signed_selector<_Tp, false, true> |
7b50cdef | 1848 | { |
a0230468 MM |
1849 | // With -fshort-enums, an enum may be as small as a char. |
1850 | typedef signed char __smallest; | |
1851 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); | |
1852 | static const bool __b1 = sizeof(_Tp) <= sizeof(signed short); | |
ce2e6349 | 1853 | static const bool __b2 = sizeof(_Tp) <= sizeof(signed int); |
a0230468 MM |
1854 | typedef conditional<__b2, signed int, signed long> __cond2; |
1855 | typedef typename __cond2::type __cond2_type; | |
1856 | typedef conditional<__b1, signed short, __cond2_type> __cond1; | |
1857 | typedef typename __cond1::type __cond1_type; | |
7b50cdef BK |
1858 | |
1859 | public: | |
a0230468 | 1860 | typedef typename conditional<__b0, __smallest, __cond1_type>::type __type; |
7b50cdef BK |
1861 | }; |
1862 | ||
7b50cdef BK |
1863 | // Given an integral/enum type, return the corresponding signed |
1864 | // integer type. | |
5b9daa7e BK |
1865 | // Primary template. |
1866 | /// make_signed | |
7b50cdef BK |
1867 | template<typename _Tp> |
1868 | struct make_signed | |
1869 | { typedef typename __make_signed_selector<_Tp>::__type type; }; | |
1870 | ||
1871 | // Integral, but don't define. | |
1872 | template<> | |
1873 | struct make_signed<bool>; | |
cfa9a96b | 1874 | |
4457e88c JW |
1875 | #if __cplusplus > 201103L |
1876 | /// Alias template for make_signed | |
1877 | template<typename _Tp> | |
1878 | using make_signed_t = typename make_signed<_Tp>::type; | |
1879 | ||
1880 | /// Alias template for make_unsigned | |
1881 | template<typename _Tp> | |
1882 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1883 | #endif | |
123c516a | 1884 | |
c0ffa2ba | 1885 | // Array modifications. |
123c516a PC |
1886 | |
1887 | /// remove_extent | |
1888 | template<typename _Tp> | |
1889 | struct remove_extent | |
1890 | { typedef _Tp type; }; | |
1891 | ||
1892 | template<typename _Tp, std::size_t _Size> | |
1893 | struct remove_extent<_Tp[_Size]> | |
1894 | { typedef _Tp type; }; | |
1895 | ||
1896 | template<typename _Tp> | |
1897 | struct remove_extent<_Tp[]> | |
1898 | { typedef _Tp type; }; | |
1899 | ||
1900 | /// remove_all_extents | |
1901 | template<typename _Tp> | |
1902 | struct remove_all_extents | |
1903 | { typedef _Tp type; }; | |
1904 | ||
1905 | template<typename _Tp, std::size_t _Size> | |
1906 | struct remove_all_extents<_Tp[_Size]> | |
1907 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1908 | ||
1909 | template<typename _Tp> | |
1910 | struct remove_all_extents<_Tp[]> | |
1911 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1912 | ||
4457e88c JW |
1913 | #if __cplusplus > 201103L |
1914 | /// Alias template for remove_extent | |
1915 | template<typename _Tp> | |
1916 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1917 | ||
1918 | /// Alias template for remove_all_extents | |
1919 | template<typename _Tp> | |
1920 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1921 | #endif | |
123c516a | 1922 | |
c0ffa2ba | 1923 | // Pointer modifications. |
123c516a PC |
1924 | |
1925 | template<typename _Tp, typename> | |
1926 | struct __remove_pointer_helper | |
1927 | { typedef _Tp type; }; | |
1928 | ||
1929 | template<typename _Tp, typename _Up> | |
1930 | struct __remove_pointer_helper<_Tp, _Up*> | |
1931 | { typedef _Up type; }; | |
1932 | ||
1933 | /// remove_pointer | |
1934 | template<typename _Tp> | |
1935 | struct remove_pointer | |
1936 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1937 | { }; | |
1938 | ||
1939 | /// add_pointer | |
89898034 DK |
1940 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1941 | is_void<_Tp>>::value> | |
1942 | struct __add_pointer_helper | |
1943 | { typedef _Tp type; }; | |
1944 | ||
123c516a | 1945 | template<typename _Tp> |
89898034 | 1946 | struct __add_pointer_helper<_Tp, true> |
123c516a PC |
1947 | { typedef typename remove_reference<_Tp>::type* type; }; |
1948 | ||
89898034 DK |
1949 | template<typename _Tp> |
1950 | struct add_pointer | |
1951 | : public __add_pointer_helper<_Tp> | |
1952 | { }; | |
1953 | ||
4457e88c JW |
1954 | #if __cplusplus > 201103L |
1955 | /// Alias template for remove_pointer | |
1956 | template<typename _Tp> | |
1957 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
1958 | ||
1959 | /// Alias template for add_pointer | |
1960 | template<typename _Tp> | |
1961 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
1962 | #endif | |
123c516a PC |
1963 | |
1964 | template<std::size_t _Len> | |
1965 | struct __aligned_storage_msa | |
1966 | { | |
1967 | union __type | |
1968 | { | |
1969 | unsigned char __data[_Len]; | |
1970 | struct __attribute__((__aligned__)) { } __align; | |
1971 | }; | |
1972 | }; | |
1973 | ||
1974 | /** | |
1975 | * @brief Alignment type. | |
1976 | * | |
1977 | * The value of _Align is a default-alignment which shall be the | |
1978 | * most stringent alignment requirement for any C++ object type | |
1979 | * whose size is no greater than _Len (3.9). The member typedef | |
1980 | * type shall be a POD type suitable for use as uninitialized | |
1981 | * storage for any object whose size is at most _Len and whose | |
1982 | * alignment is a divisor of _Align. | |
1983 | */ | |
1984 | template<std::size_t _Len, std::size_t _Align = | |
1985 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
1986 | struct aligned_storage | |
1987 | { | |
1988 | union type | |
1989 | { | |
1990 | unsigned char __data[_Len]; | |
1991 | struct __attribute__((__aligned__((_Align)))) { } __align; | |
1992 | }; | |
1993 | }; | |
1994 | ||
d3718027 RS |
1995 | template <typename... _Types> |
1996 | struct __strictest_alignment | |
1997 | { | |
1998 | static const size_t _S_alignment = 0; | |
1999 | static const size_t _S_size = 0; | |
2000 | }; | |
2001 | ||
2002 | template <typename _Tp, typename... _Types> | |
2003 | struct __strictest_alignment<_Tp, _Types...> | |
2004 | { | |
2005 | static const size_t _S_alignment = | |
2006 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2007 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2008 | static const size_t _S_size = | |
2009 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2010 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2011 | }; | |
2012 | ||
2013 | /** | |
2014 | * @brief Provide aligned storage for types. | |
2015 | * | |
2016 | * [meta.trans.other] | |
2017 | * | |
2018 | * Provides aligned storage for any of the provided types of at | |
2019 | * least size _Len. | |
2020 | * | |
2021 | * @see aligned_storage | |
2022 | */ | |
2023 | template <size_t _Len, typename... _Types> | |
2024 | struct aligned_union | |
2025 | { | |
2026 | private: | |
2027 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2028 | ||
2029 | using __strictest = __strictest_alignment<_Types...>; | |
2030 | static const size_t _S_len = _Len > __strictest::_S_size | |
2031 | ? _Len : __strictest::_S_size; | |
2032 | public: | |
2033 | /// The value of the strictest alignment of _Types. | |
2034 | static const size_t alignment_value = __strictest::_S_alignment; | |
2035 | /// The storage. | |
2036 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2037 | }; | |
2038 | ||
2039 | template <size_t _Len, typename... _Types> | |
2040 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
123c516a PC |
2041 | |
2042 | // Decay trait for arrays and functions, used for perfect forwarding | |
2043 | // in make_pair, make_tuple, etc. | |
2044 | template<typename _Up, | |
2045 | bool _IsArray = is_array<_Up>::value, | |
2046 | bool _IsFunction = is_function<_Up>::value> | |
2047 | struct __decay_selector; | |
2048 | ||
2049 | // NB: DR 705. | |
2050 | template<typename _Up> | |
2051 | struct __decay_selector<_Up, false, false> | |
2052 | { typedef typename remove_cv<_Up>::type __type; }; | |
2053 | ||
2054 | template<typename _Up> | |
2055 | struct __decay_selector<_Up, true, false> | |
2056 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2057 | ||
2058 | template<typename _Up> | |
2059 | struct __decay_selector<_Up, false, true> | |
2060 | { typedef typename add_pointer<_Up>::type __type; }; | |
2061 | ||
2062 | /// decay | |
2063 | template<typename _Tp> | |
2064 | class decay | |
2065 | { | |
2066 | typedef typename remove_reference<_Tp>::type __remove_type; | |
2067 | ||
2068 | public: | |
2069 | typedef typename __decay_selector<__remove_type>::__type type; | |
2070 | }; | |
2071 | ||
2072 | template<typename _Tp> | |
2073 | class reference_wrapper; | |
2074 | ||
2075 | // Helper which adds a reference to a type when given a reference_wrapper | |
2076 | template<typename _Tp> | |
2077 | struct __strip_reference_wrapper | |
2078 | { | |
2079 | typedef _Tp __type; | |
2080 | }; | |
2081 | ||
2082 | template<typename _Tp> | |
2083 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2084 | { | |
2085 | typedef _Tp& __type; | |
2086 | }; | |
2087 | ||
123c516a PC |
2088 | template<typename _Tp> |
2089 | struct __decay_and_strip | |
2090 | { | |
2091 | typedef typename __strip_reference_wrapper< | |
2092 | typename decay<_Tp>::type>::__type __type; | |
2093 | }; | |
2094 | ||
2095 | ||
123c516a | 2096 | // Primary template. |
13901e4b | 2097 | /// Define a member typedef @c type only if a boolean constant is true. |
123c516a PC |
2098 | template<bool, typename _Tp = void> |
2099 | struct enable_if | |
2100 | { }; | |
2101 | ||
2102 | // Partial specialization for true. | |
2103 | template<typename _Tp> | |
2104 | struct enable_if<true, _Tp> | |
2105 | { typedef _Tp type; }; | |
2106 | ||
23df8534 JW |
2107 | template<typename... _Cond> |
2108 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
123c516a | 2109 | |
123c516a | 2110 | // Primary template. |
13901e4b | 2111 | /// Define a member typedef @c type to one of two argument types. |
123c516a PC |
2112 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2113 | struct conditional | |
2114 | { typedef _Iftrue type; }; | |
2115 | ||
2116 | // Partial specialization for false. | |
2117 | template<typename _Iftrue, typename _Iffalse> | |
2118 | struct conditional<false, _Iftrue, _Iffalse> | |
2119 | { typedef _Iffalse type; }; | |
2120 | ||
5b9daa7e | 2121 | /// common_type |
cfa9a96b CF |
2122 | template<typename... _Tp> |
2123 | struct common_type; | |
2124 | ||
c0ffa2ba | 2125 | // Sfinae-friendly common_type implementation: |
b3618b71 DK |
2126 | |
2127 | struct __do_common_type_impl | |
2128 | { | |
2129 | template<typename _Tp, typename _Up> | |
6c5173c0 | 2130 | static __success_type<typename decay<decltype |
fe4e4e3b | 2131 | (true ? std::declval<_Tp>() |
6c5173c0 | 2132 | : std::declval<_Up>())>::type> _S_test(int); |
b3618b71 DK |
2133 | |
2134 | template<typename, typename> | |
2135 | static __failure_type _S_test(...); | |
2136 | }; | |
2137 | ||
2138 | template<typename _Tp, typename _Up> | |
2139 | struct __common_type_impl | |
2140 | : private __do_common_type_impl | |
2141 | { | |
2142 | typedef decltype(_S_test<_Tp, _Up>(0)) type; | |
2143 | }; | |
2144 | ||
2145 | struct __do_member_type_wrapper | |
2146 | { | |
2147 | template<typename _Tp> | |
2148 | static __success_type<typename _Tp::type> _S_test(int); | |
2149 | ||
2150 | template<typename> | |
2151 | static __failure_type _S_test(...); | |
2152 | }; | |
2153 | ||
2154 | template<typename _Tp> | |
2155 | struct __member_type_wrapper | |
2156 | : private __do_member_type_wrapper | |
2157 | { | |
2158 | typedef decltype(_S_test<_Tp>(0)) type; | |
2159 | }; | |
2160 | ||
2161 | template<typename _CTp, typename... _Args> | |
2162 | struct __expanded_common_type_wrapper | |
2163 | { | |
2164 | typedef common_type<typename _CTp::type, _Args...> type; | |
2165 | }; | |
2166 | ||
2167 | template<typename... _Args> | |
2168 | struct __expanded_common_type_wrapper<__failure_type, _Args...> | |
2169 | { typedef __failure_type type; }; | |
2170 | ||
cfa9a96b CF |
2171 | template<typename _Tp> |
2172 | struct common_type<_Tp> | |
6c5173c0 | 2173 | { typedef typename decay<_Tp>::type type; }; |
cfa9a96b CF |
2174 | |
2175 | template<typename _Tp, typename _Up> | |
7274deff | 2176 | struct common_type<_Tp, _Up> |
b3618b71 DK |
2177 | : public __common_type_impl<_Tp, _Up>::type |
2178 | { }; | |
cfa9a96b CF |
2179 | |
2180 | template<typename _Tp, typename _Up, typename... _Vp> | |
2181 | struct common_type<_Tp, _Up, _Vp...> | |
b3618b71 DK |
2182 | : public __expanded_common_type_wrapper<typename __member_type_wrapper< |
2183 | common_type<_Tp, _Up>>::type, _Vp...>::type | |
2184 | { }; | |
7274deff | 2185 | |
13901e4b | 2186 | /// The underlying type of an enum. |
a47407f6 PC |
2187 | template<typename _Tp> |
2188 | struct underlying_type | |
2189 | { | |
2190 | typedef __underlying_type(_Tp) type; | |
2191 | }; | |
123c516a | 2192 | |
7274deff PC |
2193 | template<typename _Tp> |
2194 | struct __declval_protector | |
2195 | { | |
2196 | static const bool __stop = false; | |
2197 | static typename add_rvalue_reference<_Tp>::type __delegate(); | |
2198 | }; | |
2199 | ||
2200 | template<typename _Tp> | |
2201 | inline typename add_rvalue_reference<_Tp>::type | |
e4f32cb0 | 2202 | declval() noexcept |
7274deff PC |
2203 | { |
2204 | static_assert(__declval_protector<_Tp>::__stop, | |
2205 | "declval() must not be used!"); | |
2206 | return __declval_protector<_Tp>::__delegate(); | |
2207 | } | |
1041daba | 2208 | |
be7f7822 JW |
2209 | /// result_of |
2210 | template<typename _Signature> | |
2211 | class result_of; | |
2212 | ||
c0ffa2ba | 2213 | // Sfinae-friendly result_of implementation: |
83ddb39f | 2214 | |
a15f7cb8 ESR |
2215 | #define __cpp_lib_result_of_sfinae 201210 |
2216 | ||
83ddb39f DK |
2217 | // [func.require] paragraph 1 bullet 1: |
2218 | struct __result_of_memfun_ref_impl | |
2219 | { | |
2220 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2221 | static __success_type<decltype( | |
2222 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) | |
2223 | )> _S_test(int); | |
2224 | ||
2225 | template<typename...> | |
2226 | static __failure_type _S_test(...); | |
2227 | }; | |
2228 | ||
2229 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2230 | struct __result_of_memfun_ref | |
2231 | : private __result_of_memfun_ref_impl | |
2232 | { | |
2233 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2234 | }; | |
2235 | ||
2236 | // [func.require] paragraph 1 bullet 2: | |
2237 | struct __result_of_memfun_deref_impl | |
2238 | { | |
2239 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2240 | static __success_type<decltype( | |
2241 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) | |
2242 | )> _S_test(int); | |
2243 | ||
2244 | template<typename...> | |
2245 | static __failure_type _S_test(...); | |
2246 | }; | |
2247 | ||
2248 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2249 | struct __result_of_memfun_deref | |
2250 | : private __result_of_memfun_deref_impl | |
2251 | { | |
2252 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2253 | }; | |
2254 | ||
2255 | // [func.require] paragraph 1 bullet 3: | |
2256 | struct __result_of_memobj_ref_impl | |
2257 | { | |
2258 | template<typename _Fp, typename _Tp1> | |
2259 | static __success_type<decltype( | |
2260 | std::declval<_Tp1>().*std::declval<_Fp>() | |
2261 | )> _S_test(int); | |
2262 | ||
2263 | template<typename, typename> | |
2264 | static __failure_type _S_test(...); | |
2265 | }; | |
2266 | ||
2267 | template<typename _MemPtr, typename _Arg> | |
2268 | struct __result_of_memobj_ref | |
2269 | : private __result_of_memobj_ref_impl | |
2270 | { | |
2271 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2272 | }; | |
2273 | ||
2274 | // [func.require] paragraph 1 bullet 4: | |
2275 | struct __result_of_memobj_deref_impl | |
2276 | { | |
2277 | template<typename _Fp, typename _Tp1> | |
2278 | static __success_type<decltype( | |
2279 | (*std::declval<_Tp1>()).*std::declval<_Fp>() | |
2280 | )> _S_test(int); | |
2281 | ||
2282 | template<typename, typename> | |
2283 | static __failure_type _S_test(...); | |
2284 | }; | |
2285 | ||
be7f7822 | 2286 | template<typename _MemPtr, typename _Arg> |
83ddb39f DK |
2287 | struct __result_of_memobj_deref |
2288 | : private __result_of_memobj_deref_impl | |
2289 | { | |
2290 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2291 | }; | |
2292 | ||
2293 | template<typename _MemPtr, typename _Arg> | |
2294 | struct __result_of_memobj; | |
be7f7822 JW |
2295 | |
2296 | template<typename _Res, typename _Class, typename _Arg> | |
83ddb39f | 2297 | struct __result_of_memobj<_Res _Class::*, _Arg> |
be7f7822 | 2298 | { |
83ddb39f DK |
2299 | typedef typename remove_cv<typename remove_reference< |
2300 | _Arg>::type>::type _Argval; | |
2301 | typedef _Res _Class::* _MemPtr; | |
2302 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2303 | is_base_of<_Class, _Argval>>::value, | |
2304 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2305 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2306 | >::type::type type; | |
be7f7822 JW |
2307 | }; |
2308 | ||
83ddb39f DK |
2309 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2310 | struct __result_of_memfun; | |
be7f7822 JW |
2311 | |
2312 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
83ddb39f | 2313 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
be7f7822 | 2314 | { |
83ddb39f DK |
2315 | typedef typename remove_cv<typename remove_reference< |
2316 | _Arg>::type>::type _Argval; | |
2317 | typedef _Res _Class::* _MemPtr; | |
2318 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2319 | is_base_of<_Class, _Argval>>::value, | |
2320 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, | |
2321 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2322 | >::type::type type; | |
be7f7822 JW |
2323 | }; |
2324 | ||
2325 | template<bool, bool, typename _Functor, typename... _ArgTypes> | |
83ddb39f | 2326 | struct __result_of_impl |
be7f7822 | 2327 | { |
83ddb39f | 2328 | typedef __failure_type type; |
be7f7822 JW |
2329 | }; |
2330 | ||
2331 | template<typename _MemPtr, typename _Arg> | |
83ddb39f DK |
2332 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
2333 | : public __result_of_memobj<typename decay<_MemPtr>::type, _Arg> | |
c4db9a77 | 2334 | { }; |
be7f7822 | 2335 | |
83ddb39f DK |
2336 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2337 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
2338 | : public __result_of_memfun<typename decay<_MemPtr>::type, _Arg, _Args...> | |
c4db9a77 | 2339 | { }; |
be7f7822 | 2340 | |
83ddb39f DK |
2341 | // [func.require] paragraph 1 bullet 5: |
2342 | struct __result_of_other_impl | |
2343 | { | |
2344 | template<typename _Fn, typename... _Args> | |
2345 | static __success_type<decltype( | |
2346 | std::declval<_Fn>()(std::declval<_Args>()...) | |
2347 | )> _S_test(int); | |
2348 | ||
2349 | template<typename...> | |
2350 | static __failure_type _S_test(...); | |
2351 | }; | |
2352 | ||
be7f7822 | 2353 | template<typename _Functor, typename... _ArgTypes> |
83ddb39f DK |
2354 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2355 | : private __result_of_other_impl | |
be7f7822 | 2356 | { |
83ddb39f | 2357 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
be7f7822 JW |
2358 | }; |
2359 | ||
83ddb39f DK |
2360 | template<typename _Functor, typename... _ArgTypes> |
2361 | struct result_of<_Functor(_ArgTypes...)> | |
2362 | : public __result_of_impl< | |
2363 | is_member_object_pointer< | |
2364 | typename remove_reference<_Functor>::type | |
2365 | >::value, | |
2366 | is_member_function_pointer< | |
2367 | typename remove_reference<_Functor>::type | |
2368 | >::value, | |
2369 | _Functor, _ArgTypes... | |
2370 | >::type | |
2371 | { }; | |
c0ffa2ba | 2372 | |
4457e88c JW |
2373 | #if __cplusplus > 201103L |
2374 | /// Alias template for aligned_storage | |
2375 | template<size_t _Len, size_t _Align = | |
2376 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2377 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2378 | ||
d3718027 RS |
2379 | template <size_t _Len, typename... _Types> |
2380 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2381 | ||
4457e88c JW |
2382 | /// Alias template for decay |
2383 | template<typename _Tp> | |
2384 | using decay_t = typename decay<_Tp>::type; | |
2385 | ||
2386 | /// Alias template for enable_if | |
2387 | template<bool _Cond, typename _Tp = void> | |
2388 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2389 | ||
2390 | /// Alias template for conditional | |
2391 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2392 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2393 | ||
2394 | /// Alias template for common_type | |
2395 | template<typename... _Tp> | |
2396 | using common_type_t = typename common_type<_Tp...>::type; | |
2397 | ||
2398 | /// Alias template for underlying_type | |
2399 | template<typename _Tp> | |
2400 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2401 | ||
2402 | /// Alias template for result_of | |
2403 | template<typename _Tp> | |
2404 | using result_of_t = typename result_of<_Tp>::type; | |
2405 | #endif | |
2406 | ||
847e9cf8 JW |
2407 | template<typename...> using __void_t = void; |
2408 | ||
c0ffa2ba | 2409 | /// @} group metaprogramming |
847e9cf8 | 2410 | |
033b71ce PC |
2411 | /** |
2412 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2413 | * member type _NTYPE. | |
2414 | */ | |
82b12c4b | 2415 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
847e9cf8 | 2416 | template<typename _Tp, typename = __void_t<>> \ |
82b12c4b | 2417 | struct __has_##_NTYPE \ |
847e9cf8 JW |
2418 | : false_type \ |
2419 | { }; \ | |
2420 | template<typename _Tp> \ | |
2421 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2422 | : true_type \ | |
033b71ce PC |
2423 | { }; |
2424 | ||
12ffa228 | 2425 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 2426 | } // namespace std |
7b50cdef | 2427 | |
734f5023 | 2428 | #endif // C++11 |
57317d2a | 2429 | |
7274deff | 2430 | #endif // _GLIBCXX_TYPE_TRAITS |