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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 | ||
46ba1281 | 95 | #if __cplusplus > 201402L |
f9badf71 | 96 | # define __cpp_lib_bool_constant 201505 |
46ba1281 JW |
97 | template<bool __v> |
98 | using bool_constant = integral_constant<bool, __v>; | |
99 | #endif | |
100 | ||
123c516a | 101 | // Meta programming helper types. |
53dc5044 | 102 | |
123c516a PC |
103 | template<bool, typename, typename> |
104 | struct conditional; | |
53dc5044 | 105 | |
dd7b175e | 106 | template<typename...> |
123c516a PC |
107 | struct __or_; |
108 | ||
ac65b7d2 DK |
109 | template<> |
110 | struct __or_<> | |
111 | : public false_type | |
112 | { }; | |
113 | ||
dd7b175e PC |
114 | template<typename _B1> |
115 | struct __or_<_B1> | |
116 | : public _B1 | |
117 | { }; | |
118 | ||
123c516a PC |
119 | template<typename _B1, typename _B2> |
120 | struct __or_<_B1, _B2> | |
121 | : public conditional<_B1::value, _B1, _B2>::type | |
122 | { }; | |
123 | ||
124 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
125 | struct __or_<_B1, _B2, _B3, _Bn...> | |
126 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
127 | { }; | |
53dc5044 | 128 | |
dd7b175e | 129 | template<typename...> |
123c516a | 130 | struct __and_; |
53dc5044 | 131 | |
ac65b7d2 DK |
132 | template<> |
133 | struct __and_<> | |
134 | : public true_type | |
135 | { }; | |
136 | ||
dd7b175e PC |
137 | template<typename _B1> |
138 | struct __and_<_B1> | |
139 | : public _B1 | |
140 | { }; | |
141 | ||
123c516a PC |
142 | template<typename _B1, typename _B2> |
143 | struct __and_<_B1, _B2> | |
144 | : public conditional<_B1::value, _B2, _B1>::type | |
145 | { }; | |
146 | ||
147 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
148 | struct __and_<_B1, _B2, _B3, _Bn...> | |
149 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
150 | { }; | |
151 | ||
152 | template<typename _Pp> | |
153 | struct __not_ | |
154 | : public integral_constant<bool, !_Pp::value> | |
155 | { }; | |
156 | ||
b3618b71 DK |
157 | // For several sfinae-friendly trait implementations we transport both the |
158 | // result information (as the member type) and the failure information (no | |
159 | // member type). This is very similar to std::enable_if, but we cannot use | |
160 | // them, because we need to derive from them as an implementation detail. | |
161 | ||
162 | template<typename _Tp> | |
163 | struct __success_type | |
164 | { typedef _Tp type; }; | |
165 | ||
166 | struct __failure_type | |
167 | { }; | |
168 | ||
c0ffa2ba | 169 | // Primary type categories. |
123c516a | 170 | |
53dc5044 PC |
171 | template<typename> |
172 | struct remove_cv; | |
173 | ||
174 | template<typename> | |
175 | struct __is_void_helper | |
176 | : public false_type { }; | |
53dc5044 | 177 | |
123c516a PC |
178 | template<> |
179 | struct __is_void_helper<void> | |
180 | : public true_type { }; | |
53dc5044 PC |
181 | |
182 | /// is_void | |
183 | template<typename _Tp> | |
184 | struct is_void | |
82b12c4b | 185 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
186 | { }; |
187 | ||
188 | template<typename> | |
189 | struct __is_integral_helper | |
190 | : public false_type { }; | |
123c516a PC |
191 | |
192 | template<> | |
193 | struct __is_integral_helper<bool> | |
194 | : public true_type { }; | |
195 | ||
196 | template<> | |
197 | struct __is_integral_helper<char> | |
198 | : public true_type { }; | |
199 | ||
200 | template<> | |
201 | struct __is_integral_helper<signed char> | |
202 | : public true_type { }; | |
203 | ||
204 | template<> | |
205 | struct __is_integral_helper<unsigned char> | |
206 | : public true_type { }; | |
207 | ||
53dc5044 | 208 | #ifdef _GLIBCXX_USE_WCHAR_T |
123c516a PC |
209 | template<> |
210 | struct __is_integral_helper<wchar_t> | |
211 | : public true_type { }; | |
53dc5044 | 212 | #endif |
123c516a PC |
213 | |
214 | template<> | |
215 | struct __is_integral_helper<char16_t> | |
216 | : public true_type { }; | |
217 | ||
218 | template<> | |
219 | struct __is_integral_helper<char32_t> | |
220 | : public true_type { }; | |
221 | ||
222 | template<> | |
223 | struct __is_integral_helper<short> | |
224 | : public true_type { }; | |
225 | ||
226 | template<> | |
227 | struct __is_integral_helper<unsigned short> | |
228 | : public true_type { }; | |
229 | ||
230 | template<> | |
231 | struct __is_integral_helper<int> | |
232 | : public true_type { }; | |
233 | ||
234 | template<> | |
235 | struct __is_integral_helper<unsigned int> | |
236 | : public true_type { }; | |
237 | ||
238 | template<> | |
239 | struct __is_integral_helper<long> | |
240 | : public true_type { }; | |
241 | ||
242 | template<> | |
243 | struct __is_integral_helper<unsigned long> | |
244 | : public true_type { }; | |
245 | ||
246 | template<> | |
247 | struct __is_integral_helper<long long> | |
248 | : public true_type { }; | |
249 | ||
250 | template<> | |
251 | struct __is_integral_helper<unsigned long long> | |
252 | : public true_type { }; | |
53dc5044 | 253 | |
78a7c317 DD |
254 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
255 | // uses one of these types for size_t. | |
256 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
6d585f01 | 257 | template<> |
78a7c317 | 258 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
6d585f01 PC |
259 | : public true_type { }; |
260 | ||
261 | template<> | |
78a7c317 DD |
262 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
263 | : public true_type { }; | |
264 | #endif | |
265 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
266 | template<> | |
267 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
268 | : public true_type { }; | |
269 | ||
270 | template<> | |
271 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
272 | : public true_type { }; | |
273 | #endif | |
274 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
275 | template<> | |
276 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
277 | : public true_type { }; | |
278 | ||
279 | template<> | |
280 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
281 | : public true_type { }; | |
282 | #endif | |
283 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
284 | template<> | |
285 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
286 | : public true_type { }; | |
287 | ||
288 | template<> | |
289 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
6d585f01 PC |
290 | : public true_type { }; |
291 | #endif | |
292 | ||
53dc5044 PC |
293 | /// is_integral |
294 | template<typename _Tp> | |
295 | struct is_integral | |
82b12c4b | 296 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
297 | { }; |
298 | ||
299 | template<typename> | |
300 | struct __is_floating_point_helper | |
301 | : public false_type { }; | |
123c516a PC |
302 | |
303 | template<> | |
304 | struct __is_floating_point_helper<float> | |
305 | : public true_type { }; | |
306 | ||
307 | template<> | |
308 | struct __is_floating_point_helper<double> | |
309 | : public true_type { }; | |
310 | ||
311 | template<> | |
312 | struct __is_floating_point_helper<long double> | |
313 | : public true_type { }; | |
53dc5044 | 314 | |
6d585f01 PC |
315 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
316 | template<> | |
317 | struct __is_floating_point_helper<__float128> | |
318 | : public true_type { }; | |
319 | #endif | |
320 | ||
53dc5044 PC |
321 | /// is_floating_point |
322 | template<typename _Tp> | |
323 | struct is_floating_point | |
82b12c4b | 324 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
325 | { }; |
326 | ||
327 | /// is_array | |
328 | template<typename> | |
329 | struct is_array | |
330 | : public false_type { }; | |
331 | ||
332 | template<typename _Tp, std::size_t _Size> | |
333 | struct is_array<_Tp[_Size]> | |
334 | : public true_type { }; | |
335 | ||
336 | template<typename _Tp> | |
337 | struct is_array<_Tp[]> | |
338 | : public true_type { }; | |
339 | ||
340 | template<typename> | |
341 | struct __is_pointer_helper | |
342 | : public false_type { }; | |
123c516a PC |
343 | |
344 | template<typename _Tp> | |
345 | struct __is_pointer_helper<_Tp*> | |
346 | : public true_type { }; | |
53dc5044 PC |
347 | |
348 | /// is_pointer | |
349 | template<typename _Tp> | |
350 | struct is_pointer | |
82b12c4b | 351 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
352 | { }; |
353 | ||
123c516a PC |
354 | /// is_lvalue_reference |
355 | template<typename> | |
356 | struct is_lvalue_reference | |
357 | : public false_type { }; | |
358 | ||
53dc5044 | 359 | template<typename _Tp> |
123c516a PC |
360 | struct is_lvalue_reference<_Tp&> |
361 | : public true_type { }; | |
362 | ||
363 | /// is_rvalue_reference | |
364 | template<typename> | |
365 | struct is_rvalue_reference | |
366 | : public false_type { }; | |
53dc5044 | 367 | |
53dc5044 | 368 | template<typename _Tp> |
123c516a PC |
369 | struct is_rvalue_reference<_Tp&&> |
370 | : public true_type { }; | |
371 | ||
372 | template<typename> | |
53dc5044 PC |
373 | struct is_function; |
374 | ||
375 | template<typename> | |
376 | struct __is_member_object_pointer_helper | |
377 | : public false_type { }; | |
123c516a PC |
378 | |
379 | template<typename _Tp, typename _Cp> | |
380 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
381 | : public integral_constant<bool, !is_function<_Tp>::value> { }; | |
53dc5044 PC |
382 | |
383 | /// is_member_object_pointer | |
384 | template<typename _Tp> | |
385 | struct is_member_object_pointer | |
82b12c4b FD |
386 | : public __is_member_object_pointer_helper< |
387 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
388 | { }; |
389 | ||
390 | template<typename> | |
391 | struct __is_member_function_pointer_helper | |
392 | : public false_type { }; | |
123c516a PC |
393 | |
394 | template<typename _Tp, typename _Cp> | |
395 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
396 | : public integral_constant<bool, is_function<_Tp>::value> { }; | |
53dc5044 PC |
397 | |
398 | /// is_member_function_pointer | |
399 | template<typename _Tp> | |
400 | struct is_member_function_pointer | |
82b12c4b FD |
401 | : public __is_member_function_pointer_helper< |
402 | typename remove_cv<_Tp>::type>::type | |
53dc5044 PC |
403 | { }; |
404 | ||
405 | /// is_enum | |
406 | template<typename _Tp> | |
407 | struct is_enum | |
408 | : public integral_constant<bool, __is_enum(_Tp)> | |
409 | { }; | |
410 | ||
411 | /// is_union | |
412 | template<typename _Tp> | |
413 | struct is_union | |
414 | : public integral_constant<bool, __is_union(_Tp)> | |
415 | { }; | |
416 | ||
417 | /// is_class | |
418 | template<typename _Tp> | |
419 | struct is_class | |
420 | : public integral_constant<bool, __is_class(_Tp)> | |
421 | { }; | |
422 | ||
423 | /// is_function | |
424 | template<typename> | |
425 | struct is_function | |
426 | : public false_type { }; | |
123c516a | 427 | |
53dc5044 PC |
428 | template<typename _Res, typename... _ArgTypes> |
429 | struct is_function<_Res(_ArgTypes...)> | |
430 | : public true_type { }; | |
123c516a | 431 | |
89898034 DK |
432 | template<typename _Res, typename... _ArgTypes> |
433 | struct is_function<_Res(_ArgTypes...) &> | |
434 | : public true_type { }; | |
435 | ||
436 | template<typename _Res, typename... _ArgTypes> | |
437 | struct is_function<_Res(_ArgTypes...) &&> | |
438 | : public true_type { }; | |
439 | ||
53dc5044 PC |
440 | template<typename _Res, typename... _ArgTypes> |
441 | struct is_function<_Res(_ArgTypes......)> | |
442 | : public true_type { }; | |
123c516a | 443 | |
89898034 DK |
444 | template<typename _Res, typename... _ArgTypes> |
445 | struct is_function<_Res(_ArgTypes......) &> | |
446 | : public true_type { }; | |
447 | ||
448 | template<typename _Res, typename... _ArgTypes> | |
449 | struct is_function<_Res(_ArgTypes......) &&> | |
450 | : public true_type { }; | |
451 | ||
53dc5044 PC |
452 | template<typename _Res, typename... _ArgTypes> |
453 | struct is_function<_Res(_ArgTypes...) const> | |
454 | : public true_type { }; | |
123c516a | 455 | |
89898034 DK |
456 | template<typename _Res, typename... _ArgTypes> |
457 | struct is_function<_Res(_ArgTypes...) const &> | |
458 | : public true_type { }; | |
459 | ||
460 | template<typename _Res, typename... _ArgTypes> | |
461 | struct is_function<_Res(_ArgTypes...) const &&> | |
462 | : public true_type { }; | |
463 | ||
53dc5044 PC |
464 | template<typename _Res, typename... _ArgTypes> |
465 | struct is_function<_Res(_ArgTypes......) const> | |
466 | : public true_type { }; | |
123c516a | 467 | |
89898034 DK |
468 | template<typename _Res, typename... _ArgTypes> |
469 | struct is_function<_Res(_ArgTypes......) const &> | |
470 | : public true_type { }; | |
471 | ||
472 | template<typename _Res, typename... _ArgTypes> | |
473 | struct is_function<_Res(_ArgTypes......) const &&> | |
474 | : public true_type { }; | |
475 | ||
53dc5044 PC |
476 | template<typename _Res, typename... _ArgTypes> |
477 | struct is_function<_Res(_ArgTypes...) volatile> | |
478 | : public true_type { }; | |
123c516a | 479 | |
89898034 DK |
480 | template<typename _Res, typename... _ArgTypes> |
481 | struct is_function<_Res(_ArgTypes...) volatile &> | |
482 | : public true_type { }; | |
483 | ||
484 | template<typename _Res, typename... _ArgTypes> | |
485 | struct is_function<_Res(_ArgTypes...) volatile &&> | |
486 | : public true_type { }; | |
487 | ||
53dc5044 PC |
488 | template<typename _Res, typename... _ArgTypes> |
489 | struct is_function<_Res(_ArgTypes......) volatile> | |
490 | : public true_type { }; | |
123c516a | 491 | |
89898034 DK |
492 | template<typename _Res, typename... _ArgTypes> |
493 | struct is_function<_Res(_ArgTypes......) volatile &> | |
494 | : public true_type { }; | |
495 | ||
496 | template<typename _Res, typename... _ArgTypes> | |
497 | struct is_function<_Res(_ArgTypes......) volatile &&> | |
498 | : public true_type { }; | |
499 | ||
53dc5044 PC |
500 | template<typename _Res, typename... _ArgTypes> |
501 | struct is_function<_Res(_ArgTypes...) const volatile> | |
502 | : public true_type { }; | |
123c516a | 503 | |
89898034 DK |
504 | template<typename _Res, typename... _ArgTypes> |
505 | struct is_function<_Res(_ArgTypes...) const volatile &> | |
506 | : public true_type { }; | |
507 | ||
508 | template<typename _Res, typename... _ArgTypes> | |
509 | struct is_function<_Res(_ArgTypes...) const volatile &&> | |
510 | : public true_type { }; | |
511 | ||
53dc5044 PC |
512 | template<typename _Res, typename... _ArgTypes> |
513 | struct is_function<_Res(_ArgTypes......) const volatile> | |
514 | : public true_type { }; | |
515 | ||
89898034 DK |
516 | template<typename _Res, typename... _ArgTypes> |
517 | struct is_function<_Res(_ArgTypes......) const volatile &> | |
518 | : public true_type { }; | |
519 | ||
520 | template<typename _Res, typename... _ArgTypes> | |
521 | struct is_function<_Res(_ArgTypes......) const volatile &&> | |
522 | : public true_type { }; | |
523 | ||
a15f7cb8 ESR |
524 | #define __cpp_lib_is_null_pointer 201309 |
525 | ||
1e673415 | 526 | template<typename> |
aa940ab5 | 527 | struct __is_null_pointer_helper |
1e673415 | 528 | : public false_type { }; |
123c516a PC |
529 | |
530 | template<> | |
aa940ab5 | 531 | struct __is_null_pointer_helper<std::nullptr_t> |
123c516a | 532 | : public true_type { }; |
1e673415 | 533 | |
aa940ab5 PC |
534 | /// is_null_pointer (LWG 2247). |
535 | template<typename _Tp> | |
536 | struct is_null_pointer | |
537 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
538 | { }; | |
539 | ||
540 | /// __is_nullptr_t (extension). | |
1e673415 PC |
541 | template<typename _Tp> |
542 | struct __is_nullptr_t | |
aa940ab5 | 543 | : public is_null_pointer<_Tp> |
1e673415 PC |
544 | { }; |
545 | ||
c0ffa2ba | 546 | // Composite type categories. |
123c516a PC |
547 | |
548 | /// is_reference | |
549 | template<typename _Tp> | |
550 | struct is_reference | |
551 | : public __or_<is_lvalue_reference<_Tp>, | |
552 | is_rvalue_reference<_Tp>>::type | |
553 | { }; | |
554 | ||
53dc5044 PC |
555 | /// is_arithmetic |
556 | template<typename _Tp> | |
557 | struct is_arithmetic | |
123c516a | 558 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
53dc5044 PC |
559 | { }; |
560 | ||
561 | /// is_fundamental | |
562 | template<typename _Tp> | |
563 | struct is_fundamental | |
aa940ab5 PC |
564 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
565 | is_null_pointer<_Tp>>::type | |
53dc5044 PC |
566 | { }; |
567 | ||
568 | /// is_object | |
569 | template<typename _Tp> | |
570 | struct is_object | |
123c516a PC |
571 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
572 | is_void<_Tp>>>::type | |
53dc5044 PC |
573 | { }; |
574 | ||
123c516a | 575 | template<typename> |
53dc5044 PC |
576 | struct is_member_pointer; |
577 | ||
578 | /// is_scalar | |
579 | template<typename _Tp> | |
580 | struct is_scalar | |
123c516a | 581 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
aa940ab5 | 582 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
53dc5044 PC |
583 | { }; |
584 | ||
585 | /// is_compound | |
586 | template<typename _Tp> | |
587 | struct is_compound | |
588 | : public integral_constant<bool, !is_fundamental<_Tp>::value> { }; | |
589 | ||
53dc5044 PC |
590 | template<typename _Tp> |
591 | struct __is_member_pointer_helper | |
592 | : public false_type { }; | |
123c516a PC |
593 | |
594 | template<typename _Tp, typename _Cp> | |
595 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
596 | : public true_type { }; | |
53dc5044 | 597 | |
13901e4b | 598 | /// is_member_pointer |
53dc5044 | 599 | template<typename _Tp> |
123c516a | 600 | struct is_member_pointer |
82b12c4b | 601 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
53dc5044 PC |
602 | { }; |
603 | ||
89898034 DK |
604 | // Utility to detect referenceable types ([defns.referenceable]). |
605 | ||
606 | template<typename _Tp> | |
607 | struct __is_referenceable | |
608 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type | |
609 | { }; | |
610 | ||
611 | template<typename _Res, typename... _Args> | |
612 | struct __is_referenceable<_Res(_Args...)> | |
613 | : public true_type | |
614 | { }; | |
615 | ||
616 | template<typename _Res, typename... _Args> | |
617 | struct __is_referenceable<_Res(_Args......)> | |
618 | : public true_type | |
619 | { }; | |
620 | ||
c0ffa2ba | 621 | // Type properties. |
123c516a | 622 | |
53dc5044 PC |
623 | /// is_const |
624 | template<typename> | |
625 | struct is_const | |
626 | : public false_type { }; | |
627 | ||
628 | template<typename _Tp> | |
629 | struct is_const<_Tp const> | |
630 | : public true_type { }; | |
631 | ||
632 | /// is_volatile | |
633 | template<typename> | |
634 | struct is_volatile | |
635 | : public false_type { }; | |
636 | ||
637 | template<typename _Tp> | |
638 | struct is_volatile<_Tp volatile> | |
639 | : public true_type { }; | |
640 | ||
123c516a PC |
641 | /// is_trivial |
642 | template<typename _Tp> | |
643 | struct is_trivial | |
644 | : public integral_constant<bool, __is_trivial(_Tp)> | |
645 | { }; | |
646 | ||
f5e523b7 VV |
647 | // is_trivially_copyable |
648 | template<typename _Tp> | |
649 | struct is_trivially_copyable | |
650 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
651 | { }; | |
123c516a PC |
652 | |
653 | /// is_standard_layout | |
654 | template<typename _Tp> | |
655 | struct is_standard_layout | |
656 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
657 | { }; | |
658 | ||
659 | /// is_pod | |
660 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
661 | template<typename _Tp> | |
662 | struct is_pod | |
663 | : public integral_constant<bool, __is_pod(_Tp)> | |
664 | { }; | |
665 | ||
666 | /// is_literal_type | |
667 | template<typename _Tp> | |
668 | struct is_literal_type | |
669 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
670 | { }; | |
671 | ||
53dc5044 PC |
672 | /// is_empty |
673 | template<typename _Tp> | |
674 | struct is_empty | |
675 | : public integral_constant<bool, __is_empty(_Tp)> | |
676 | { }; | |
677 | ||
678 | /// is_polymorphic | |
679 | template<typename _Tp> | |
680 | struct is_polymorphic | |
681 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
682 | { }; | |
683 | ||
4db7fcb9 ESR |
684 | #if __cplusplus >= 201402L |
685 | #define __cpp_lib_is_final 201402L | |
686 | /// is_final | |
687 | template<typename _Tp> | |
688 | struct is_final | |
689 | : public integral_constant<bool, __is_final(_Tp)> | |
690 | { }; | |
691 | #endif | |
692 | ||
53dc5044 PC |
693 | /// is_abstract |
694 | template<typename _Tp> | |
695 | struct is_abstract | |
696 | : public integral_constant<bool, __is_abstract(_Tp)> | |
697 | { }; | |
698 | ||
123c516a | 699 | template<typename _Tp, |
6a4b1a00 | 700 | bool = is_arithmetic<_Tp>::value> |
123c516a PC |
701 | struct __is_signed_helper |
702 | : public false_type { }; | |
703 | ||
53dc5044 | 704 | template<typename _Tp> |
6a4b1a00 PC |
705 | struct __is_signed_helper<_Tp, true> |
706 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
53dc5044 PC |
707 | { }; |
708 | ||
123c516a | 709 | /// is_signed |
53dc5044 | 710 | template<typename _Tp> |
123c516a | 711 | struct is_signed |
82b12c4b | 712 | : public __is_signed_helper<_Tp>::type |
123c516a PC |
713 | { }; |
714 | ||
715 | /// is_unsigned | |
716 | template<typename _Tp> | |
717 | struct is_unsigned | |
718 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type | |
719 | { }; | |
720 | ||
721 | ||
c0ffa2ba | 722 | // Destructible and constructible type properties. |
123c516a | 723 | |
53dc5044 | 724 | template<typename> |
123c516a | 725 | struct add_rvalue_reference; |
53dc5044 | 726 | |
13901e4b JW |
727 | /** |
728 | * @brief Utility to simplify expressions used in unevaluated operands | |
729 | * @ingroup utilities | |
730 | */ | |
53dc5044 | 731 | template<typename _Tp> |
123c516a | 732 | typename add_rvalue_reference<_Tp>::type declval() noexcept; |
53dc5044 | 733 | |
123c516a PC |
734 | template<typename, unsigned = 0> |
735 | struct extent; | |
736 | ||
737 | template<typename> | |
738 | struct remove_all_extents; | |
739 | ||
740 | template<typename _Tp> | |
741 | struct __is_array_known_bounds | |
742 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
53dc5044 PC |
743 | { }; |
744 | ||
123c516a PC |
745 | template<typename _Tp> |
746 | struct __is_array_unknown_bounds | |
747 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>>::type | |
53dc5044 | 748 | { }; |
2c7a09d7 | 749 | |
62fa805f | 750 | // In N3290 is_destructible does not say anything about function |
2c7a09d7 | 751 | // types and abstract types, see LWG 2049. This implementation |
62fa805f DK |
752 | // describes function types as non-destructible and all complete |
753 | // object types as destructible, iff the explicit destructor | |
2c7a09d7 | 754 | // call expression is wellformed. |
62fa805f | 755 | struct __do_is_destructible_impl |
123c516a | 756 | { |
62fa805f | 757 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
123c516a PC |
758 | static true_type __test(int); |
759 | ||
760 | template<typename> | |
761 | static false_type __test(...); | |
762 | }; | |
53dc5044 PC |
763 | |
764 | template<typename _Tp> | |
62fa805f DK |
765 | struct __is_destructible_impl |
766 | : public __do_is_destructible_impl | |
123c516a PC |
767 | { |
768 | typedef decltype(__test<_Tp>(0)) type; | |
769 | }; | |
53dc5044 | 770 | |
62fa805f DK |
771 | template<typename _Tp, |
772 | bool = __or_<is_void<_Tp>, | |
773 | __is_array_unknown_bounds<_Tp>, | |
774 | is_function<_Tp>>::value, | |
775 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
776 | struct __is_destructible_safe; | |
777 | ||
778 | template<typename _Tp> | |
779 | struct __is_destructible_safe<_Tp, false, false> | |
780 | : public __is_destructible_impl<typename | |
781 | remove_all_extents<_Tp>::type>::type | |
782 | { }; | |
783 | ||
784 | template<typename _Tp> | |
785 | struct __is_destructible_safe<_Tp, true, false> | |
786 | : public false_type { }; | |
787 | ||
788 | template<typename _Tp> | |
789 | struct __is_destructible_safe<_Tp, false, true> | |
790 | : public true_type { }; | |
791 | ||
792 | /// is_destructible | |
793 | template<typename _Tp> | |
794 | struct is_destructible | |
82b12c4b | 795 | : public __is_destructible_safe<_Tp>::type |
62fa805f DK |
796 | { }; |
797 | ||
798 | // is_nothrow_destructible requires that is_destructible is | |
799 | // satisfied as well. We realize that by mimicing the | |
800 | // implementation of is_destructible but refer to noexcept(expr) | |
801 | // instead of decltype(expr). | |
802 | struct __do_is_nt_destructible_impl | |
123c516a | 803 | { |
62fa805f DK |
804 | template<typename _Tp> |
805 | static integral_constant<bool, noexcept(declval<_Tp&>().~_Tp())> | |
806 | __test(int); | |
123c516a PC |
807 | |
808 | template<typename> | |
809 | static false_type __test(...); | |
810 | }; | |
53dc5044 | 811 | |
53dc5044 | 812 | template<typename _Tp> |
62fa805f DK |
813 | struct __is_nt_destructible_impl |
814 | : public __do_is_nt_destructible_impl | |
123c516a PC |
815 | { |
816 | typedef decltype(__test<_Tp>(0)) type; | |
817 | }; | |
818 | ||
819 | template<typename _Tp, | |
820 | bool = __or_<is_void<_Tp>, | |
62fa805f DK |
821 | __is_array_unknown_bounds<_Tp>, |
822 | is_function<_Tp>>::value, | |
823 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
824 | struct __is_nt_destructible_safe; | |
53dc5044 PC |
825 | |
826 | template<typename _Tp> | |
62fa805f DK |
827 | struct __is_nt_destructible_safe<_Tp, false, false> |
828 | : public __is_nt_destructible_impl<typename | |
829 | remove_all_extents<_Tp>::type>::type | |
123c516a PC |
830 | { }; |
831 | ||
53dc5044 | 832 | template<typename _Tp> |
62fa805f | 833 | struct __is_nt_destructible_safe<_Tp, true, false> |
123c516a | 834 | : public false_type { }; |
53dc5044 PC |
835 | |
836 | template<typename _Tp> | |
62fa805f | 837 | struct __is_nt_destructible_safe<_Tp, false, true> |
123c516a PC |
838 | : public true_type { }; |
839 | ||
62fa805f | 840 | /// is_nothrow_destructible |
53dc5044 | 841 | template<typename _Tp> |
62fa805f | 842 | struct is_nothrow_destructible |
82b12c4b | 843 | : public __is_nt_destructible_safe<_Tp>::type |
123c516a PC |
844 | { }; |
845 | ||
846 | struct __do_is_default_constructible_impl | |
847 | { | |
848 | template<typename _Tp, typename = decltype(_Tp())> | |
849 | static true_type __test(int); | |
850 | ||
851 | template<typename> | |
852 | static false_type __test(...); | |
853 | }; | |
854 | ||
855 | template<typename _Tp> | |
856 | struct __is_default_constructible_impl | |
857 | : public __do_is_default_constructible_impl | |
53dc5044 | 858 | { |
123c516a | 859 | typedef decltype(__test<_Tp>(0)) type; |
53dc5044 | 860 | }; |
53dc5044 PC |
861 | |
862 | template<typename _Tp> | |
123c516a | 863 | struct __is_default_constructible_atom |
2c7a09d7 PC |
864 | : public __and_<__not_<is_void<_Tp>>, |
865 | __is_default_constructible_impl<_Tp>>::type | |
123c516a | 866 | { }; |
53dc5044 | 867 | |
123c516a PC |
868 | template<typename _Tp, bool = is_array<_Tp>::value> |
869 | struct __is_default_constructible_safe; | |
53dc5044 | 870 | |
2c7a09d7 PC |
871 | // The following technique is a workaround for a current core language |
872 | // restriction, which does not allow for array types to occur in | |
873 | // functional casts of the form T(). Complete arrays can be default- | |
874 | // constructed, if the element type is default-constructible, but | |
875 | // arrays with unknown bounds are not. | |
53dc5044 | 876 | template<typename _Tp> |
123c516a PC |
877 | struct __is_default_constructible_safe<_Tp, true> |
878 | : public __and_<__is_array_known_bounds<_Tp>, | |
879 | __is_default_constructible_atom<typename | |
2c7a09d7 | 880 | remove_all_extents<_Tp>::type>>::type |
53dc5044 PC |
881 | { }; |
882 | ||
53dc5044 | 883 | template<typename _Tp> |
123c516a PC |
884 | struct __is_default_constructible_safe<_Tp, false> |
885 | : public __is_default_constructible_atom<_Tp>::type | |
886 | { }; | |
4a27a739 | 887 | |
123c516a | 888 | /// is_default_constructible |
4a27a739 | 889 | template<typename _Tp> |
123c516a | 890 | struct is_default_constructible |
82b12c4b | 891 | : public __is_default_constructible_safe<_Tp>::type |
123c516a | 892 | { }; |
4a27a739 | 893 | |
2c7a09d7 PC |
894 | |
895 | // Implementation of is_constructible. | |
896 | ||
897 | // The hardest part of this trait is the binary direct-initialization | |
898 | // case, because we hit into a functional cast of the form T(arg). | |
899 | // This implementation uses different strategies depending on the | |
900 | // target type to reduce the test overhead as much as possible: | |
901 | // | |
902 | // a) For a reference target type, we use a static_cast expression | |
903 | // modulo its extra cases. | |
904 | // | |
905 | // b) For a non-reference target type we use a ::new expression. | |
123c516a PC |
906 | struct __do_is_static_castable_impl |
907 | { | |
908 | template<typename _From, typename _To, typename | |
909 | = decltype(static_cast<_To>(declval<_From>()))> | |
910 | static true_type __test(int); | |
4a27a739 | 911 | |
123c516a PC |
912 | template<typename, typename> |
913 | static false_type __test(...); | |
914 | }; | |
4a27a739 | 915 | |
123c516a PC |
916 | template<typename _From, typename _To> |
917 | struct __is_static_castable_impl | |
918 | : public __do_is_static_castable_impl | |
919 | { | |
920 | typedef decltype(__test<_From, _To>(0)) type; | |
921 | }; | |
939759fc | 922 | |
123c516a PC |
923 | template<typename _From, typename _To> |
924 | struct __is_static_castable_safe | |
2c7a09d7 | 925 | : public __is_static_castable_impl<_From, _To>::type |
4a27a739 PC |
926 | { }; |
927 | ||
123c516a PC |
928 | // __is_static_castable |
929 | template<typename _From, typename _To> | |
930 | struct __is_static_castable | |
931 | : public integral_constant<bool, (__is_static_castable_safe< | |
932 | _From, _To>::value)> | |
933 | { }; | |
939759fc | 934 | |
2c7a09d7 PC |
935 | // Implementation for non-reference types. To meet the proper |
936 | // variable definition semantics, we also need to test for | |
937 | // is_destructible in this case. | |
5db25ab1 DK |
938 | // This form should be simplified by a single expression: |
939 | // ::delete ::new _Tp(declval<_Arg>()), see c++/51222. | |
123c516a PC |
940 | struct __do_is_direct_constructible_impl |
941 | { | |
942 | template<typename _Tp, typename _Arg, typename | |
943 | = decltype(::new _Tp(declval<_Arg>()))> | |
944 | static true_type __test(int); | |
4a27a739 | 945 | |
123c516a PC |
946 | template<typename, typename> |
947 | static false_type __test(...); | |
948 | }; | |
4a27a739 | 949 | |
123c516a PC |
950 | template<typename _Tp, typename _Arg> |
951 | struct __is_direct_constructible_impl | |
952 | : public __do_is_direct_constructible_impl | |
953 | { | |
954 | typedef decltype(__test<_Tp, _Arg>(0)) type; | |
955 | }; | |
4a27a739 | 956 | |
123c516a PC |
957 | template<typename _Tp, typename _Arg> |
958 | struct __is_direct_constructible_new_safe | |
959 | : public __and_<is_destructible<_Tp>, | |
2c7a09d7 | 960 | __is_direct_constructible_impl<_Tp, _Arg>>::type |
123c516a | 961 | { }; |
4a27a739 | 962 | |
123c516a PC |
963 | template<typename, typename> |
964 | struct is_same; | |
4a27a739 | 965 | |
123c516a PC |
966 | template<typename, typename> |
967 | struct is_base_of; | |
4a27a739 | 968 | |
123c516a PC |
969 | template<typename> |
970 | struct remove_reference; | |
4a27a739 | 971 | |
123c516a | 972 | template<typename _From, typename _To, bool |
5db25ab1 DK |
973 | = __not_<__or_<is_void<_From>, |
974 | is_function<_From>>>::value> | |
123c516a | 975 | struct __is_base_to_derived_ref; |
4a27a739 | 976 | |
5db25ab1 DK |
977 | // Detect whether we have a downcast situation during |
978 | // reference binding. | |
123c516a PC |
979 | template<typename _From, typename _To> |
980 | struct __is_base_to_derived_ref<_From, _To, true> | |
981 | { | |
982 | typedef typename remove_cv<typename remove_reference<_From | |
983 | >::type>::type __src_t; | |
984 | typedef typename remove_cv<typename remove_reference<_To | |
985 | >::type>::type __dst_t; | |
2c7a09d7 PC |
986 | typedef __and_<__not_<is_same<__src_t, __dst_t>>, |
987 | is_base_of<__src_t, __dst_t>> type; | |
123c516a PC |
988 | static constexpr bool value = type::value; |
989 | }; | |
4a27a739 | 990 | |
123c516a PC |
991 | template<typename _From, typename _To> |
992 | struct __is_base_to_derived_ref<_From, _To, false> | |
993 | : public false_type | |
4a27a739 PC |
994 | { }; |
995 | ||
123c516a PC |
996 | template<typename _From, typename _To, bool |
997 | = __and_<is_lvalue_reference<_From>, | |
998 | is_rvalue_reference<_To>>::value> | |
999 | struct __is_lvalue_to_rvalue_ref; | |
e133ace8 | 1000 | |
5db25ab1 DK |
1001 | // Detect whether we have an lvalue of non-function type |
1002 | // bound to a reference-compatible rvalue-reference. | |
123c516a PC |
1003 | template<typename _From, typename _To> |
1004 | struct __is_lvalue_to_rvalue_ref<_From, _To, true> | |
1005 | { | |
1006 | typedef typename remove_cv<typename remove_reference< | |
1007 | _From>::type>::type __src_t; | |
1008 | typedef typename remove_cv<typename remove_reference< | |
1009 | _To>::type>::type __dst_t; | |
5db25ab1 DK |
1010 | typedef __and_<__not_<is_function<__src_t>>, |
1011 | __or_<is_same<__src_t, __dst_t>, | |
1012 | is_base_of<__dst_t, __src_t>>> type; | |
123c516a PC |
1013 | static constexpr bool value = type::value; |
1014 | }; | |
e133ace8 | 1015 | |
123c516a PC |
1016 | template<typename _From, typename _To> |
1017 | struct __is_lvalue_to_rvalue_ref<_From, _To, false> | |
1018 | : public false_type | |
e133ace8 PC |
1019 | { }; |
1020 | ||
2c7a09d7 PC |
1021 | // Here we handle direct-initialization to a reference type as |
1022 | // equivalent to a static_cast modulo overshooting conversions. | |
1023 | // These are restricted to the following conversions: | |
5db25ab1 | 1024 | // a) A base class value to a derived class reference |
2c7a09d7 | 1025 | // b) An lvalue to an rvalue-reference of reference-compatible |
5db25ab1 | 1026 | // types that are not functions |
123c516a PC |
1027 | template<typename _Tp, typename _Arg> |
1028 | struct __is_direct_constructible_ref_cast | |
1029 | : public __and_<__is_static_castable<_Arg, _Tp>, | |
1030 | __not_<__or_<__is_base_to_derived_ref<_Arg, _Tp>, | |
1031 | __is_lvalue_to_rvalue_ref<_Arg, _Tp> | |
2c7a09d7 | 1032 | >>>::type |
e133ace8 PC |
1033 | { }; |
1034 | ||
123c516a PC |
1035 | template<typename _Tp, typename _Arg> |
1036 | struct __is_direct_constructible_new | |
1037 | : public conditional<is_reference<_Tp>::value, | |
1038 | __is_direct_constructible_ref_cast<_Tp, _Arg>, | |
1039 | __is_direct_constructible_new_safe<_Tp, _Arg> | |
1040 | >::type | |
b0302c68 PC |
1041 | { }; |
1042 | ||
123c516a PC |
1043 | template<typename _Tp, typename _Arg> |
1044 | struct __is_direct_constructible | |
82b12c4b | 1045 | : public __is_direct_constructible_new<_Tp, _Arg>::type |
e133ace8 PC |
1046 | { }; |
1047 | ||
2c7a09d7 PC |
1048 | // Since default-construction and binary direct-initialization have |
1049 | // been handled separately, the implementation of the remaining | |
5db25ab1 DK |
1050 | // n-ary construction cases is rather straightforward. We can use |
1051 | // here a functional cast, because array types are excluded anyway | |
1052 | // and this form is never interpreted as a C cast. | |
123c516a PC |
1053 | struct __do_is_nary_constructible_impl |
1054 | { | |
1055 | template<typename _Tp, typename... _Args, typename | |
1056 | = decltype(_Tp(declval<_Args>()...))> | |
1057 | static true_type __test(int); | |
2b08f2c5 | 1058 | |
123c516a PC |
1059 | template<typename, typename...> |
1060 | static false_type __test(...); | |
1061 | }; | |
b0302c68 PC |
1062 | |
1063 | template<typename _Tp, typename... _Args> | |
123c516a PC |
1064 | struct __is_nary_constructible_impl |
1065 | : public __do_is_nary_constructible_impl | |
b0302c68 | 1066 | { |
123c516a | 1067 | typedef decltype(__test<_Tp, _Args...>(0)) type; |
b0302c68 PC |
1068 | }; |
1069 | ||
123c516a PC |
1070 | template<typename _Tp, typename... _Args> |
1071 | struct __is_nary_constructible | |
2c7a09d7 | 1072 | : public __is_nary_constructible_impl<_Tp, _Args...>::type |
b0302c68 | 1073 | { |
123c516a PC |
1074 | static_assert(sizeof...(_Args) > 1, |
1075 | "Only useful for > 1 arguments"); | |
1076 | }; | |
b0302c68 | 1077 | |
123c516a PC |
1078 | template<typename _Tp, typename... _Args> |
1079 | struct __is_constructible_impl | |
1080 | : public __is_nary_constructible<_Tp, _Args...> | |
1081 | { }; | |
b0302c68 | 1082 | |
123c516a PC |
1083 | template<typename _Tp, typename _Arg> |
1084 | struct __is_constructible_impl<_Tp, _Arg> | |
1085 | : public __is_direct_constructible<_Tp, _Arg> | |
1086 | { }; | |
1087 | ||
1088 | template<typename _Tp> | |
1089 | struct __is_constructible_impl<_Tp> | |
1090 | : public is_default_constructible<_Tp> | |
1091 | { }; | |
b0302c68 PC |
1092 | |
1093 | /// is_constructible | |
b0302c68 PC |
1094 | template<typename _Tp, typename... _Args> |
1095 | struct is_constructible | |
82b12c4b | 1096 | : public __is_constructible_impl<_Tp, _Args...>::type |
c32097d8 JM |
1097 | { }; |
1098 | ||
89898034 | 1099 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd | 1100 | struct __is_copy_constructible_impl; |
123c516a | 1101 | |
65cee9bd | 1102 | template<typename _Tp> |
89898034 | 1103 | struct __is_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1104 | : public false_type { }; |
1105 | ||
1106 | template<typename _Tp> | |
89898034 | 1107 | struct __is_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1108 | : public is_constructible<_Tp, const _Tp&> |
1109 | { }; | |
1110 | ||
1111 | /// is_copy_constructible | |
1112 | template<typename _Tp> | |
1113 | struct is_copy_constructible | |
1114 | : public __is_copy_constructible_impl<_Tp> | |
1115 | { }; | |
1116 | ||
89898034 | 1117 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1118 | struct __is_move_constructible_impl; |
1119 | ||
1120 | template<typename _Tp> | |
89898034 | 1121 | struct __is_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1122 | : public false_type { }; |
1123 | ||
1124 | template<typename _Tp> | |
89898034 | 1125 | struct __is_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1126 | : public is_constructible<_Tp, _Tp&&> |
1127 | { }; | |
1128 | ||
1129 | /// is_move_constructible | |
1130 | template<typename _Tp> | |
1131 | struct is_move_constructible | |
1132 | : public __is_move_constructible_impl<_Tp> | |
1133 | { }; | |
1134 | ||
1135 | template<typename _Tp> | |
1136 | struct __is_nt_default_constructible_atom | |
1137 | : public integral_constant<bool, noexcept(_Tp())> | |
1138 | { }; | |
1139 | ||
1140 | template<typename _Tp, bool = is_array<_Tp>::value> | |
1141 | struct __is_nt_default_constructible_impl; | |
1142 | ||
1143 | template<typename _Tp> | |
1144 | struct __is_nt_default_constructible_impl<_Tp, true> | |
1145 | : public __and_<__is_array_known_bounds<_Tp>, | |
1146 | __is_nt_default_constructible_atom<typename | |
1147 | remove_all_extents<_Tp>::type>>::type | |
1148 | { }; | |
1149 | ||
1150 | template<typename _Tp> | |
1151 | struct __is_nt_default_constructible_impl<_Tp, false> | |
1152 | : public __is_nt_default_constructible_atom<_Tp> | |
1153 | { }; | |
1154 | ||
1155 | /// is_nothrow_default_constructible | |
1156 | template<typename _Tp> | |
1157 | struct is_nothrow_default_constructible | |
1158 | : public __and_<is_default_constructible<_Tp>, | |
1159 | __is_nt_default_constructible_impl<_Tp>>::type | |
1160 | { }; | |
e4f32cb0 PC |
1161 | |
1162 | template<typename _Tp, typename... _Args> | |
65cee9bd PC |
1163 | struct __is_nt_constructible_impl |
1164 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
1165 | { }; | |
e4f32cb0 PC |
1166 | |
1167 | template<typename _Tp, typename _Arg> | |
65cee9bd PC |
1168 | struct __is_nt_constructible_impl<_Tp, _Arg> |
1169 | : public integral_constant<bool, | |
1170 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
1171 | { }; | |
1172 | ||
1173 | template<typename _Tp> | |
1174 | struct __is_nt_constructible_impl<_Tp> | |
1175 | : public is_nothrow_default_constructible<_Tp> | |
1176 | { }; | |
e4f32cb0 PC |
1177 | |
1178 | /// is_nothrow_constructible | |
1179 | template<typename _Tp, typename... _Args> | |
1180 | struct is_nothrow_constructible | |
65cee9bd PC |
1181 | : public __and_<is_constructible<_Tp, _Args...>, |
1182 | __is_nt_constructible_impl<_Tp, _Args...>>::type | |
1183 | { }; | |
1184 | ||
89898034 | 1185 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1186 | struct __is_nothrow_copy_constructible_impl; |
1187 | ||
1188 | template<typename _Tp> | |
89898034 | 1189 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
65cee9bd PC |
1190 | : public false_type { }; |
1191 | ||
1192 | template<typename _Tp> | |
89898034 | 1193 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
65cee9bd PC |
1194 | : public is_nothrow_constructible<_Tp, const _Tp&> |
1195 | { }; | |
1196 | ||
1197 | /// is_nothrow_copy_constructible | |
1198 | template<typename _Tp> | |
1199 | struct is_nothrow_copy_constructible | |
1200 | : public __is_nothrow_copy_constructible_impl<_Tp> | |
1201 | { }; | |
1202 | ||
89898034 | 1203 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
65cee9bd PC |
1204 | struct __is_nothrow_move_constructible_impl; |
1205 | ||
1206 | template<typename _Tp> | |
89898034 | 1207 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
65cee9bd PC |
1208 | : public false_type { }; |
1209 | ||
1210 | template<typename _Tp> | |
89898034 | 1211 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
65cee9bd PC |
1212 | : public is_nothrow_constructible<_Tp, _Tp&&> |
1213 | { }; | |
1214 | ||
1215 | /// is_nothrow_move_constructible | |
1216 | template<typename _Tp> | |
1217 | struct is_nothrow_move_constructible | |
1218 | : public __is_nothrow_move_constructible_impl<_Tp> | |
1219 | { }; | |
1220 | ||
f263981a PC |
1221 | template<typename _Tp, typename _Up> |
1222 | class __is_assignable_helper | |
f263981a | 1223 | { |
82b12c4b FD |
1224 | template<typename _Tp1, typename _Up1, |
1225 | typename = decltype(declval<_Tp1>() = declval<_Up1>())> | |
1226 | static true_type | |
f263981a PC |
1227 | __test(int); |
1228 | ||
1229 | template<typename, typename> | |
82b12c4b FD |
1230 | static false_type |
1231 | __test(...); | |
f263981a PC |
1232 | |
1233 | public: | |
82b12c4b | 1234 | typedef decltype(__test<_Tp, _Up>(0)) type; |
f263981a PC |
1235 | }; |
1236 | ||
1237 | /// is_assignable | |
1238 | template<typename _Tp, typename _Up> | |
1239 | struct is_assignable | |
82b12c4b | 1240 | : public __is_assignable_helper<_Tp, _Up>::type |
f263981a PC |
1241 | { }; |
1242 | ||
89898034 | 1243 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1244 | struct __is_copy_assignable_impl; |
1245 | ||
1246 | template<typename _Tp> | |
89898034 | 1247 | struct __is_copy_assignable_impl<_Tp, false> |
f263981a PC |
1248 | : public false_type { }; |
1249 | ||
1250 | template<typename _Tp> | |
89898034 | 1251 | struct __is_copy_assignable_impl<_Tp, true> |
9b3a81da | 1252 | : public is_assignable<_Tp&, const _Tp&> |
f263981a PC |
1253 | { }; |
1254 | ||
1255 | /// is_copy_assignable | |
1256 | template<typename _Tp> | |
1257 | struct is_copy_assignable | |
1258 | : public __is_copy_assignable_impl<_Tp> | |
1259 | { }; | |
1260 | ||
89898034 | 1261 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1262 | struct __is_move_assignable_impl; |
1263 | ||
1264 | template<typename _Tp> | |
89898034 | 1265 | struct __is_move_assignable_impl<_Tp, false> |
f263981a PC |
1266 | : public false_type { }; |
1267 | ||
1268 | template<typename _Tp> | |
89898034 | 1269 | struct __is_move_assignable_impl<_Tp, true> |
f263981a PC |
1270 | : public is_assignable<_Tp&, _Tp&&> |
1271 | { }; | |
1272 | ||
1273 | /// is_move_assignable | |
1274 | template<typename _Tp> | |
1275 | struct is_move_assignable | |
1276 | : public __is_move_assignable_impl<_Tp> | |
1277 | { }; | |
1278 | ||
1279 | template<typename _Tp, typename _Up> | |
1280 | struct __is_nt_assignable_impl | |
1281 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1282 | { }; | |
1283 | ||
1284 | /// is_nothrow_assignable | |
1285 | template<typename _Tp, typename _Up> | |
1286 | struct is_nothrow_assignable | |
1287 | : public __and_<is_assignable<_Tp, _Up>, | |
1288 | __is_nt_assignable_impl<_Tp, _Up>>::type | |
1289 | { }; | |
1290 | ||
89898034 | 1291 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1292 | struct __is_nt_copy_assignable_impl; |
1293 | ||
1294 | template<typename _Tp> | |
89898034 | 1295 | struct __is_nt_copy_assignable_impl<_Tp, false> |
f263981a PC |
1296 | : public false_type { }; |
1297 | ||
1298 | template<typename _Tp> | |
89898034 | 1299 | struct __is_nt_copy_assignable_impl<_Tp, true> |
9b3a81da | 1300 | : public is_nothrow_assignable<_Tp&, const _Tp&> |
f263981a PC |
1301 | { }; |
1302 | ||
1303 | /// is_nothrow_copy_assignable | |
1304 | template<typename _Tp> | |
1305 | struct is_nothrow_copy_assignable | |
1306 | : public __is_nt_copy_assignable_impl<_Tp> | |
1307 | { }; | |
1308 | ||
89898034 | 1309 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
f263981a PC |
1310 | struct __is_nt_move_assignable_impl; |
1311 | ||
1312 | template<typename _Tp> | |
89898034 | 1313 | struct __is_nt_move_assignable_impl<_Tp, false> |
f263981a PC |
1314 | : public false_type { }; |
1315 | ||
1316 | template<typename _Tp> | |
89898034 | 1317 | struct __is_nt_move_assignable_impl<_Tp, true> |
f263981a PC |
1318 | : public is_nothrow_assignable<_Tp&, _Tp&&> |
1319 | { }; | |
1320 | ||
1321 | /// is_nothrow_move_assignable | |
65cee9bd | 1322 | template<typename _Tp> |
f263981a PC |
1323 | struct is_nothrow_move_assignable |
1324 | : public __is_nt_move_assignable_impl<_Tp> | |
e4f32cb0 PC |
1325 | { }; |
1326 | ||
f5e523b7 VV |
1327 | /// is_trivially_constructible |
1328 | template<typename _Tp, typename... _Args> | |
1329 | struct is_trivially_constructible | |
1330 | : public __and_<is_constructible<_Tp, _Args...>, integral_constant<bool, | |
1331 | __is_trivially_constructible(_Tp, _Args...)>>::type | |
1332 | { }; | |
6a9ecd34 | 1333 | |
f5e523b7 VV |
1334 | /// is_trivially_default_constructible |
1335 | template<typename _Tp> | |
1336 | struct is_trivially_default_constructible | |
1337 | : public is_trivially_constructible<_Tp>::type | |
1338 | { }; | |
6a9ecd34 | 1339 | |
f5e523b7 VV |
1340 | /// is_trivially_copy_constructible |
1341 | template<typename _Tp> | |
1342 | struct is_trivially_copy_constructible | |
1343 | : public __and_<is_copy_constructible<_Tp>, | |
1344 | integral_constant<bool, | |
1345 | __is_trivially_constructible(_Tp, const _Tp&)>>::type | |
1346 | { }; | |
1347 | ||
1348 | /// is_trivially_move_constructible | |
1349 | template<typename _Tp> | |
1350 | struct is_trivially_move_constructible | |
1351 | : public __and_<is_move_constructible<_Tp>, | |
1352 | integral_constant<bool, | |
1353 | __is_trivially_constructible(_Tp, _Tp&&)>>::type | |
1354 | { }; | |
6a9ecd34 | 1355 | |
f5e523b7 VV |
1356 | /// is_trivially_assignable |
1357 | template<typename _Tp, typename _Up> | |
1358 | struct is_trivially_assignable | |
1359 | : public __and_<is_assignable<_Tp, _Up>, | |
1360 | integral_constant<bool, | |
1361 | __is_trivially_assignable(_Tp, _Up)>>::type | |
1362 | { }; | |
6a9ecd34 | 1363 | |
f5e523b7 VV |
1364 | /// is_trivially_copy_assignable |
1365 | template<typename _Tp> | |
1366 | struct is_trivially_copy_assignable | |
1367 | : public __and_<is_copy_assignable<_Tp>, | |
1368 | integral_constant<bool, | |
1369 | __is_trivially_assignable(_Tp&, const _Tp&)>>::type | |
1370 | { }; | |
6a9ecd34 | 1371 | |
f5e523b7 VV |
1372 | /// is_trivially_move_assignable |
1373 | template<typename _Tp> | |
1374 | struct is_trivially_move_assignable | |
1375 | : public __and_<is_move_assignable<_Tp>, | |
1376 | integral_constant<bool, | |
1377 | __is_trivially_assignable(_Tp&, _Tp&&)>>::type | |
1378 | { }; | |
6a9ecd34 PC |
1379 | |
1380 | /// is_trivially_destructible | |
1381 | template<typename _Tp> | |
1382 | struct is_trivially_destructible | |
1383 | : public __and_<is_destructible<_Tp>, integral_constant<bool, | |
1384 | __has_trivial_destructor(_Tp)>>::type | |
1385 | { }; | |
1386 | ||
1387 | /// has_trivial_default_constructor (temporary legacy) | |
e133ace8 PC |
1388 | template<typename _Tp> |
1389 | struct has_trivial_default_constructor | |
1390 | : public integral_constant<bool, __has_trivial_constructor(_Tp)> | |
c66b93fe | 1391 | { } _GLIBCXX_DEPRECATED; |
e133ace8 | 1392 | |
6a9ecd34 | 1393 | /// has_trivial_copy_constructor (temporary legacy) |
e133ace8 PC |
1394 | template<typename _Tp> |
1395 | struct has_trivial_copy_constructor | |
1396 | : public integral_constant<bool, __has_trivial_copy(_Tp)> | |
c66b93fe | 1397 | { } _GLIBCXX_DEPRECATED; |
e133ace8 | 1398 | |
6a9ecd34 | 1399 | /// has_trivial_copy_assign (temporary legacy) |
e133ace8 | 1400 | template<typename _Tp> |
6f5e9b8d | 1401 | struct has_trivial_copy_assign |
e133ace8 | 1402 | : public integral_constant<bool, __has_trivial_assign(_Tp)> |
c66b93fe | 1403 | { } _GLIBCXX_DEPRECATED; |
e133ace8 | 1404 | |
123c516a PC |
1405 | /// has_virtual_destructor |
1406 | template<typename _Tp> | |
1407 | struct has_virtual_destructor | |
1408 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
1409 | { }; | |
1410 | ||
1411 | ||
1412 | // type property queries. | |
1413 | ||
1414 | /// alignment_of | |
1415 | template<typename _Tp> | |
1416 | struct alignment_of | |
1417 | : public integral_constant<std::size_t, __alignof__(_Tp)> { }; | |
1418 | ||
1419 | /// rank | |
1420 | template<typename> | |
1421 | struct rank | |
1422 | : public integral_constant<std::size_t, 0> { }; | |
1423 | ||
1424 | template<typename _Tp, std::size_t _Size> | |
1425 | struct rank<_Tp[_Size]> | |
1426 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1427 | ||
1428 | template<typename _Tp> | |
1429 | struct rank<_Tp[]> | |
1430 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1431 | ||
1432 | /// extent | |
1433 | template<typename, unsigned _Uint> | |
1434 | struct extent | |
1435 | : public integral_constant<std::size_t, 0> { }; | |
1436 | ||
1437 | template<typename _Tp, unsigned _Uint, std::size_t _Size> | |
1438 | struct extent<_Tp[_Size], _Uint> | |
1439 | : public integral_constant<std::size_t, | |
1440 | _Uint == 0 ? _Size : extent<_Tp, | |
1441 | _Uint - 1>::value> | |
1442 | { }; | |
1443 | ||
1444 | template<typename _Tp, unsigned _Uint> | |
1445 | struct extent<_Tp[], _Uint> | |
1446 | : public integral_constant<std::size_t, | |
1447 | _Uint == 0 ? 0 : extent<_Tp, | |
1448 | _Uint - 1>::value> | |
1449 | { }; | |
1450 | ||
1451 | ||
c0ffa2ba | 1452 | // Type relations. |
123c516a PC |
1453 | |
1454 | /// is_same | |
1455 | template<typename, typename> | |
1456 | struct is_same | |
1457 | : public false_type { }; | |
1458 | ||
1459 | template<typename _Tp> | |
1460 | struct is_same<_Tp, _Tp> | |
1461 | : public true_type { }; | |
b0302c68 | 1462 | |
939759fc | 1463 | /// is_base_of |
e133ace8 PC |
1464 | template<typename _Base, typename _Derived> |
1465 | struct is_base_of | |
1466 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1467 | { }; | |
1468 | ||
297f34d7 | 1469 | template<typename _From, typename _To, |
123c516a PC |
1470 | bool = __or_<is_void<_From>, is_function<_To>, |
1471 | is_array<_To>>::value> | |
297f34d7 | 1472 | struct __is_convertible_helper |
82b12c4b | 1473 | { typedef typename is_void<_To>::type type; }; |
297f34d7 | 1474 | |
e133ace8 | 1475 | template<typename _From, typename _To> |
b0302c68 | 1476 | class __is_convertible_helper<_From, _To, false> |
e133ace8 | 1477 | { |
82b12c4b FD |
1478 | template<typename _To1> |
1479 | static void __test_aux(_To1); | |
8e7d962a | 1480 | |
82b12c4b FD |
1481 | template<typename _From1, typename _To1, |
1482 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1483 | static true_type | |
8e7d962a PC |
1484 | __test(int); |
1485 | ||
1486 | template<typename, typename> | |
82b12c4b FD |
1487 | static false_type |
1488 | __test(...); | |
297f34d7 | 1489 | |
e133ace8 | 1490 | public: |
82b12c4b | 1491 | typedef decltype(__test<_From, _To>(0)) type; |
e133ace8 PC |
1492 | }; |
1493 | ||
82b12c4b | 1494 | |
b0302c68 | 1495 | /// is_convertible |
e133ace8 PC |
1496 | template<typename _From, typename _To> |
1497 | struct is_convertible | |
82b12c4b | 1498 | : public __is_convertible_helper<_From, _To>::type |
e133ace8 PC |
1499 | { }; |
1500 | ||
fd735b6a | 1501 | |
c0ffa2ba | 1502 | // Const-volatile modifications. |
7b50cdef | 1503 | |
123c516a | 1504 | /// remove_const |
7b50cdef | 1505 | template<typename _Tp> |
123c516a PC |
1506 | struct remove_const |
1507 | { typedef _Tp type; }; | |
7b50cdef | 1508 | |
123c516a PC |
1509 | template<typename _Tp> |
1510 | struct remove_const<_Tp const> | |
1511 | { typedef _Tp type; }; | |
1512 | ||
1513 | /// remove_volatile | |
1514 | template<typename _Tp> | |
1515 | struct remove_volatile | |
1516 | { typedef _Tp type; }; | |
7b50cdef | 1517 | |
123c516a PC |
1518 | template<typename _Tp> |
1519 | struct remove_volatile<_Tp volatile> | |
1520 | { typedef _Tp type; }; | |
1521 | ||
1522 | /// remove_cv | |
1523 | template<typename _Tp> | |
1524 | struct remove_cv | |
1525 | { | |
1526 | typedef typename | |
1527 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1528 | }; | |
1529 | ||
1530 | /// add_const | |
1531 | template<typename _Tp> | |
1532 | struct add_const | |
1533 | { typedef _Tp const type; }; | |
1534 | ||
1535 | /// add_volatile | |
1536 | template<typename _Tp> | |
1537 | struct add_volatile | |
1538 | { typedef _Tp volatile type; }; | |
1539 | ||
1540 | /// add_cv | |
1541 | template<typename _Tp> | |
1542 | struct add_cv | |
1543 | { | |
1544 | typedef typename | |
1545 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1546 | }; | |
7b50cdef | 1547 | |
4457e88c | 1548 | #if __cplusplus > 201103L |
a15f7cb8 ESR |
1549 | |
1550 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1551 | ||
4457e88c JW |
1552 | /// Alias template for remove_const |
1553 | template<typename _Tp> | |
1554 | using remove_const_t = typename remove_const<_Tp>::type; | |
1555 | ||
1556 | /// Alias template for remove_volatile | |
1557 | template<typename _Tp> | |
1558 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1559 | ||
1560 | /// Alias template for remove_cv | |
1561 | template<typename _Tp> | |
1562 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1563 | ||
1564 | /// Alias template for add_const | |
1565 | template<typename _Tp> | |
1566 | using add_const_t = typename add_const<_Tp>::type; | |
1567 | ||
1568 | /// Alias template for add_volatile | |
1569 | template<typename _Tp> | |
1570 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1571 | ||
1572 | /// Alias template for add_cv | |
1573 | template<typename _Tp> | |
1574 | using add_cv_t = typename add_cv<_Tp>::type; | |
1575 | #endif | |
7b50cdef | 1576 | |
123c516a | 1577 | // Reference transformations. |
7b50cdef | 1578 | |
123c516a PC |
1579 | /// remove_reference |
1580 | template<typename _Tp> | |
1581 | struct remove_reference | |
1582 | { typedef _Tp type; }; | |
7b50cdef | 1583 | |
123c516a PC |
1584 | template<typename _Tp> |
1585 | struct remove_reference<_Tp&> | |
1586 | { typedef _Tp type; }; | |
7b50cdef | 1587 | |
123c516a PC |
1588 | template<typename _Tp> |
1589 | struct remove_reference<_Tp&&> | |
1590 | { typedef _Tp type; }; | |
1591 | ||
89898034 | 1592 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1593 | struct __add_lvalue_reference_helper |
1594 | { typedef _Tp type; }; | |
7b50cdef | 1595 | |
5e108459 | 1596 | template<typename _Tp> |
89898034 | 1597 | struct __add_lvalue_reference_helper<_Tp, true> |
123c516a | 1598 | { typedef _Tp& type; }; |
5e108459 | 1599 | |
123c516a | 1600 | /// add_lvalue_reference |
5e108459 | 1601 | template<typename _Tp> |
123c516a PC |
1602 | struct add_lvalue_reference |
1603 | : public __add_lvalue_reference_helper<_Tp> | |
1604 | { }; | |
1605 | ||
89898034 | 1606 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
123c516a PC |
1607 | struct __add_rvalue_reference_helper |
1608 | { typedef _Tp type; }; | |
5e108459 PC |
1609 | |
1610 | template<typename _Tp> | |
123c516a PC |
1611 | struct __add_rvalue_reference_helper<_Tp, true> |
1612 | { typedef _Tp&& type; }; | |
5e108459 | 1613 | |
123c516a | 1614 | /// add_rvalue_reference |
5e108459 | 1615 | template<typename _Tp> |
123c516a PC |
1616 | struct add_rvalue_reference |
1617 | : public __add_rvalue_reference_helper<_Tp> | |
1618 | { }; | |
5e108459 | 1619 | |
4457e88c JW |
1620 | #if __cplusplus > 201103L |
1621 | /// Alias template for remove_reference | |
1622 | template<typename _Tp> | |
1623 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1624 | ||
1625 | /// Alias template for add_lvalue_reference | |
1626 | template<typename _Tp> | |
1627 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1628 | ||
1629 | /// Alias template for add_rvalue_reference | |
1630 | template<typename _Tp> | |
1631 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1632 | #endif | |
7b50cdef | 1633 | |
c0ffa2ba | 1634 | // Sign modifications. |
123c516a | 1635 | |
7b50cdef BK |
1636 | // Utility for constructing identically cv-qualified types. |
1637 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1638 | struct __cv_selector; | |
1639 | ||
1640 | template<typename _Unqualified> | |
1641 | struct __cv_selector<_Unqualified, false, false> | |
1642 | { typedef _Unqualified __type; }; | |
1643 | ||
1644 | template<typename _Unqualified> | |
1645 | struct __cv_selector<_Unqualified, false, true> | |
1646 | { typedef volatile _Unqualified __type; }; | |
1647 | ||
1648 | template<typename _Unqualified> | |
1649 | struct __cv_selector<_Unqualified, true, false> | |
1650 | { typedef const _Unqualified __type; }; | |
1651 | ||
1652 | template<typename _Unqualified> | |
1653 | struct __cv_selector<_Unqualified, true, true> | |
1654 | { typedef const volatile _Unqualified __type; }; | |
1655 | ||
1656 | template<typename _Qualified, typename _Unqualified, | |
1657 | bool _IsConst = is_const<_Qualified>::value, | |
1658 | bool _IsVol = is_volatile<_Qualified>::value> | |
b0302c68 | 1659 | class __match_cv_qualifiers |
7b50cdef | 1660 | { |
7b50cdef BK |
1661 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1662 | ||
1663 | public: | |
1664 | typedef typename __match::__type __type; | |
1665 | }; | |
1666 | ||
7b50cdef BK |
1667 | // Utility for finding the unsigned versions of signed integral types. |
1668 | template<typename _Tp> | |
e133ace8 PC |
1669 | struct __make_unsigned |
1670 | { typedef _Tp __type; }; | |
7b50cdef BK |
1671 | |
1672 | template<> | |
1673 | struct __make_unsigned<char> | |
1674 | { typedef unsigned char __type; }; | |
1675 | ||
1676 | template<> | |
1677 | struct __make_unsigned<signed char> | |
1678 | { typedef unsigned char __type; }; | |
1679 | ||
7b50cdef BK |
1680 | template<> |
1681 | struct __make_unsigned<short> | |
1682 | { typedef unsigned short __type; }; | |
1683 | ||
1684 | template<> | |
1685 | struct __make_unsigned<int> | |
1686 | { typedef unsigned int __type; }; | |
1687 | ||
1688 | template<> | |
1689 | struct __make_unsigned<long> | |
1690 | { typedef unsigned long __type; }; | |
1691 | ||
1692 | template<> | |
1693 | struct __make_unsigned<long long> | |
1694 | { typedef unsigned long long __type; }; | |
1695 | ||
c0eef1c8 JW |
1696 | #if defined(_GLIBCXX_USE_WCHAR_T) && !defined(__WCHAR_UNSIGNED__) |
1697 | template<> | |
1698 | struct __make_unsigned<wchar_t> : __make_unsigned<__WCHAR_TYPE__> | |
1699 | { }; | |
1700 | #endif | |
1701 | ||
78a7c317 DD |
1702 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1703 | template<> | |
1704 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1705 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1706 | #endif | |
1707 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1708 | template<> | |
1709 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1710 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1711 | #endif | |
1712 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
6d585f01 | 1713 | template<> |
78a7c317 DD |
1714 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1715 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1716 | #endif | |
1717 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1718 | template<> | |
1719 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1720 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1721 | #endif |
1722 | ||
7b50cdef BK |
1723 | // Select between integral and enum: not possible to be both. |
1724 | template<typename _Tp, | |
1725 | bool _IsInt = is_integral<_Tp>::value, | |
7b50cdef | 1726 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1727 | class __make_unsigned_selector; |
1728 | ||
7b50cdef | 1729 | template<typename _Tp> |
b0302c68 | 1730 | class __make_unsigned_selector<_Tp, true, false> |
7b50cdef | 1731 | { |
7b50cdef BK |
1732 | typedef __make_unsigned<typename remove_cv<_Tp>::type> __unsignedt; |
1733 | typedef typename __unsignedt::__type __unsigned_type; | |
1734 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1735 | ||
1736 | public: | |
1737 | typedef typename __cv_unsigned::__type __type; | |
1738 | }; | |
1739 | ||
7b50cdef | 1740 | template<typename _Tp> |
b0302c68 | 1741 | class __make_unsigned_selector<_Tp, false, true> |
7b50cdef | 1742 | { |
a0230468 MM |
1743 | // With -fshort-enums, an enum may be as small as a char. |
1744 | typedef unsigned char __smallest; | |
1745 | static const bool __b0 = sizeof(_Tp) <= sizeof(__smallest); | |
1746 | static const bool __b1 = sizeof(_Tp) <= sizeof(unsigned short); | |
ce2e6349 | 1747 | static const bool __b2 = sizeof(_Tp) <= sizeof(unsigned int); |
73d81d3a JW |
1748 | static const bool __b3 = sizeof(_Tp) <= sizeof(unsigned long); |
1749 | typedef conditional<__b3, unsigned long, unsigned long long> __cond3; | |
1750 | typedef typename __cond3::type __cond3_type; | |
1751 | typedef conditional<__b2, unsigned int, __cond3_type> __cond2; | |
a0230468 MM |
1752 | typedef typename __cond2::type __cond2_type; |
1753 | typedef conditional<__b1, unsigned short, __cond2_type> __cond1; | |
1754 | typedef typename __cond1::type __cond1_type; | |
7b50cdef | 1755 | |
73d81d3a JW |
1756 | typedef typename conditional<__b0, __smallest, __cond1_type>::type |
1757 | __unsigned_type; | |
1758 | typedef __match_cv_qualifiers<_Tp, __unsigned_type> __cv_unsigned; | |
1759 | ||
7b50cdef | 1760 | public: |
73d81d3a | 1761 | typedef typename __cv_unsigned::__type __type; |
7b50cdef BK |
1762 | }; |
1763 | ||
7b50cdef BK |
1764 | // Given an integral/enum type, return the corresponding unsigned |
1765 | // integer type. | |
5b9daa7e BK |
1766 | // Primary template. |
1767 | /// make_unsigned | |
7b50cdef BK |
1768 | template<typename _Tp> |
1769 | struct make_unsigned | |
1770 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; | |
1771 | ||
1772 | // Integral, but don't define. | |
1773 | template<> | |
1774 | struct make_unsigned<bool>; | |
1775 | ||
1776 | ||
1777 | // Utility for finding the signed versions of unsigned integral types. | |
1778 | template<typename _Tp> | |
e133ace8 PC |
1779 | struct __make_signed |
1780 | { typedef _Tp __type; }; | |
7b50cdef BK |
1781 | |
1782 | template<> | |
1783 | struct __make_signed<char> | |
1784 | { typedef signed char __type; }; | |
1785 | ||
1786 | template<> | |
1787 | struct __make_signed<unsigned char> | |
1788 | { typedef signed char __type; }; | |
1789 | ||
7b50cdef BK |
1790 | template<> |
1791 | struct __make_signed<unsigned short> | |
1792 | { typedef signed short __type; }; | |
1793 | ||
1794 | template<> | |
1795 | struct __make_signed<unsigned int> | |
1796 | { typedef signed int __type; }; | |
1797 | ||
1798 | template<> | |
1799 | struct __make_signed<unsigned long> | |
1800 | { typedef signed long __type; }; | |
1801 | ||
1802 | template<> | |
1803 | struct __make_signed<unsigned long long> | |
1804 | { typedef signed long long __type; }; | |
1805 | ||
c0eef1c8 JW |
1806 | #if defined(_GLIBCXX_USE_WCHAR_T) && defined(__WCHAR_UNSIGNED__) |
1807 | template<> | |
1808 | struct __make_signed<wchar_t> : __make_signed<__WCHAR_TYPE__> | |
1809 | { }; | |
1810 | #endif | |
1811 | ||
1812 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
1813 | template<> | |
1814 | struct __make_signed<char16_t> : __make_signed<uint_least16_t> | |
1815 | { }; | |
1816 | template<> | |
1817 | struct __make_signed<char32_t> : __make_signed<uint_least32_t> | |
1818 | { }; | |
1819 | #endif | |
1820 | ||
78a7c317 DD |
1821 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1822 | template<> | |
1823 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1824 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1825 | #endif | |
1826 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1827 | template<> | |
1828 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1829 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1830 | #endif | |
1831 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1832 | template<> | |
1833 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1834 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1835 | #endif | |
1836 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
6d585f01 | 1837 | template<> |
78a7c317 DD |
1838 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1839 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
6d585f01 PC |
1840 | #endif |
1841 | ||
fb8ffd10 | 1842 | // Select between integral and enum: not possible to be both. |
7b50cdef BK |
1843 | template<typename _Tp, |
1844 | bool _IsInt = is_integral<_Tp>::value, | |
7b50cdef | 1845 | bool _IsEnum = is_enum<_Tp>::value> |
b0302c68 PC |
1846 | class __make_signed_selector; |
1847 | ||
7b50cdef | 1848 | template<typename _Tp> |
b0302c68 | 1849 | class __make_signed_selector<_Tp, true, false> |
7b50cdef | 1850 | { |
7b50cdef BK |
1851 | typedef __make_signed<typename remove_cv<_Tp>::type> __signedt; |
1852 | typedef typename __signedt::__type __signed_type; | |
1853 | typedef __match_cv_qualifiers<_Tp, __signed_type> __cv_signed; | |
1854 | ||
1855 | public: | |
1856 | typedef typename __cv_signed::__type __type; | |
1857 | }; | |
1858 | ||
7b50cdef | 1859 | template<typename _Tp> |
b0302c68 | 1860 | class __make_signed_selector<_Tp, false, true> |
7b50cdef | 1861 | { |
73d81d3a | 1862 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
7b50cdef BK |
1863 | |
1864 | public: | |
73d81d3a | 1865 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
7b50cdef BK |
1866 | }; |
1867 | ||
7b50cdef BK |
1868 | // Given an integral/enum type, return the corresponding signed |
1869 | // integer type. | |
5b9daa7e BK |
1870 | // Primary template. |
1871 | /// make_signed | |
7b50cdef BK |
1872 | template<typename _Tp> |
1873 | struct make_signed | |
1874 | { typedef typename __make_signed_selector<_Tp>::__type type; }; | |
1875 | ||
1876 | // Integral, but don't define. | |
1877 | template<> | |
1878 | struct make_signed<bool>; | |
cfa9a96b | 1879 | |
4457e88c JW |
1880 | #if __cplusplus > 201103L |
1881 | /// Alias template for make_signed | |
1882 | template<typename _Tp> | |
1883 | using make_signed_t = typename make_signed<_Tp>::type; | |
1884 | ||
1885 | /// Alias template for make_unsigned | |
1886 | template<typename _Tp> | |
1887 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1888 | #endif | |
123c516a | 1889 | |
c0ffa2ba | 1890 | // Array modifications. |
123c516a PC |
1891 | |
1892 | /// remove_extent | |
1893 | template<typename _Tp> | |
1894 | struct remove_extent | |
1895 | { typedef _Tp type; }; | |
1896 | ||
1897 | template<typename _Tp, std::size_t _Size> | |
1898 | struct remove_extent<_Tp[_Size]> | |
1899 | { typedef _Tp type; }; | |
1900 | ||
1901 | template<typename _Tp> | |
1902 | struct remove_extent<_Tp[]> | |
1903 | { typedef _Tp type; }; | |
1904 | ||
1905 | /// remove_all_extents | |
1906 | template<typename _Tp> | |
1907 | struct remove_all_extents | |
1908 | { typedef _Tp type; }; | |
1909 | ||
1910 | template<typename _Tp, std::size_t _Size> | |
1911 | struct remove_all_extents<_Tp[_Size]> | |
1912 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1913 | ||
1914 | template<typename _Tp> | |
1915 | struct remove_all_extents<_Tp[]> | |
1916 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1917 | ||
4457e88c JW |
1918 | #if __cplusplus > 201103L |
1919 | /// Alias template for remove_extent | |
1920 | template<typename _Tp> | |
1921 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1922 | ||
1923 | /// Alias template for remove_all_extents | |
1924 | template<typename _Tp> | |
1925 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1926 | #endif | |
123c516a | 1927 | |
c0ffa2ba | 1928 | // Pointer modifications. |
123c516a PC |
1929 | |
1930 | template<typename _Tp, typename> | |
1931 | struct __remove_pointer_helper | |
1932 | { typedef _Tp type; }; | |
1933 | ||
1934 | template<typename _Tp, typename _Up> | |
1935 | struct __remove_pointer_helper<_Tp, _Up*> | |
1936 | { typedef _Up type; }; | |
1937 | ||
1938 | /// remove_pointer | |
1939 | template<typename _Tp> | |
1940 | struct remove_pointer | |
1941 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1942 | { }; | |
1943 | ||
1944 | /// add_pointer | |
89898034 DK |
1945 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1946 | is_void<_Tp>>::value> | |
1947 | struct __add_pointer_helper | |
1948 | { typedef _Tp type; }; | |
1949 | ||
123c516a | 1950 | template<typename _Tp> |
89898034 | 1951 | struct __add_pointer_helper<_Tp, true> |
123c516a PC |
1952 | { typedef typename remove_reference<_Tp>::type* type; }; |
1953 | ||
89898034 DK |
1954 | template<typename _Tp> |
1955 | struct add_pointer | |
1956 | : public __add_pointer_helper<_Tp> | |
1957 | { }; | |
1958 | ||
4457e88c JW |
1959 | #if __cplusplus > 201103L |
1960 | /// Alias template for remove_pointer | |
1961 | template<typename _Tp> | |
1962 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
1963 | ||
1964 | /// Alias template for add_pointer | |
1965 | template<typename _Tp> | |
1966 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
1967 | #endif | |
123c516a PC |
1968 | |
1969 | template<std::size_t _Len> | |
1970 | struct __aligned_storage_msa | |
1971 | { | |
1972 | union __type | |
1973 | { | |
1974 | unsigned char __data[_Len]; | |
1975 | struct __attribute__((__aligned__)) { } __align; | |
1976 | }; | |
1977 | }; | |
1978 | ||
1979 | /** | |
1980 | * @brief Alignment type. | |
1981 | * | |
1982 | * The value of _Align is a default-alignment which shall be the | |
1983 | * most stringent alignment requirement for any C++ object type | |
1984 | * whose size is no greater than _Len (3.9). The member typedef | |
1985 | * type shall be a POD type suitable for use as uninitialized | |
1986 | * storage for any object whose size is at most _Len and whose | |
1987 | * alignment is a divisor of _Align. | |
1988 | */ | |
1989 | template<std::size_t _Len, std::size_t _Align = | |
1990 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
1991 | struct aligned_storage | |
1992 | { | |
1993 | union type | |
1994 | { | |
1995 | unsigned char __data[_Len]; | |
1996 | struct __attribute__((__aligned__((_Align)))) { } __align; | |
1997 | }; | |
1998 | }; | |
1999 | ||
d3718027 RS |
2000 | template <typename... _Types> |
2001 | struct __strictest_alignment | |
2002 | { | |
2003 | static const size_t _S_alignment = 0; | |
2004 | static const size_t _S_size = 0; | |
2005 | }; | |
2006 | ||
2007 | template <typename _Tp, typename... _Types> | |
2008 | struct __strictest_alignment<_Tp, _Types...> | |
2009 | { | |
2010 | static const size_t _S_alignment = | |
2011 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
2012 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
2013 | static const size_t _S_size = | |
2014 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
2015 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
2016 | }; | |
2017 | ||
2018 | /** | |
2019 | * @brief Provide aligned storage for types. | |
2020 | * | |
2021 | * [meta.trans.other] | |
2022 | * | |
2023 | * Provides aligned storage for any of the provided types of at | |
2024 | * least size _Len. | |
2025 | * | |
2026 | * @see aligned_storage | |
2027 | */ | |
2028 | template <size_t _Len, typename... _Types> | |
2029 | struct aligned_union | |
2030 | { | |
2031 | private: | |
2032 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
2033 | ||
2034 | using __strictest = __strictest_alignment<_Types...>; | |
2035 | static const size_t _S_len = _Len > __strictest::_S_size | |
2036 | ? _Len : __strictest::_S_size; | |
2037 | public: | |
2038 | /// The value of the strictest alignment of _Types. | |
2039 | static const size_t alignment_value = __strictest::_S_alignment; | |
2040 | /// The storage. | |
2041 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
2042 | }; | |
2043 | ||
2044 | template <size_t _Len, typename... _Types> | |
2045 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
123c516a PC |
2046 | |
2047 | // Decay trait for arrays and functions, used for perfect forwarding | |
2048 | // in make_pair, make_tuple, etc. | |
2049 | template<typename _Up, | |
2050 | bool _IsArray = is_array<_Up>::value, | |
2051 | bool _IsFunction = is_function<_Up>::value> | |
2052 | struct __decay_selector; | |
2053 | ||
2054 | // NB: DR 705. | |
2055 | template<typename _Up> | |
2056 | struct __decay_selector<_Up, false, false> | |
2057 | { typedef typename remove_cv<_Up>::type __type; }; | |
2058 | ||
2059 | template<typename _Up> | |
2060 | struct __decay_selector<_Up, true, false> | |
2061 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2062 | ||
2063 | template<typename _Up> | |
2064 | struct __decay_selector<_Up, false, true> | |
2065 | { typedef typename add_pointer<_Up>::type __type; }; | |
2066 | ||
2067 | /// decay | |
2068 | template<typename _Tp> | |
2069 | class decay | |
2070 | { | |
2071 | typedef typename remove_reference<_Tp>::type __remove_type; | |
2072 | ||
2073 | public: | |
2074 | typedef typename __decay_selector<__remove_type>::__type type; | |
2075 | }; | |
2076 | ||
2077 | template<typename _Tp> | |
2078 | class reference_wrapper; | |
2079 | ||
2080 | // Helper which adds a reference to a type when given a reference_wrapper | |
2081 | template<typename _Tp> | |
2082 | struct __strip_reference_wrapper | |
2083 | { | |
2084 | typedef _Tp __type; | |
2085 | }; | |
2086 | ||
2087 | template<typename _Tp> | |
2088 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2089 | { | |
2090 | typedef _Tp& __type; | |
2091 | }; | |
2092 | ||
123c516a PC |
2093 | template<typename _Tp> |
2094 | struct __decay_and_strip | |
2095 | { | |
2096 | typedef typename __strip_reference_wrapper< | |
2097 | typename decay<_Tp>::type>::__type __type; | |
2098 | }; | |
2099 | ||
2100 | ||
123c516a | 2101 | // Primary template. |
13901e4b | 2102 | /// Define a member typedef @c type only if a boolean constant is true. |
123c516a PC |
2103 | template<bool, typename _Tp = void> |
2104 | struct enable_if | |
2105 | { }; | |
2106 | ||
2107 | // Partial specialization for true. | |
2108 | template<typename _Tp> | |
2109 | struct enable_if<true, _Tp> | |
2110 | { typedef _Tp type; }; | |
2111 | ||
23df8534 JW |
2112 | template<typename... _Cond> |
2113 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
123c516a | 2114 | |
123c516a | 2115 | // Primary template. |
13901e4b | 2116 | /// Define a member typedef @c type to one of two argument types. |
123c516a PC |
2117 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2118 | struct conditional | |
2119 | { typedef _Iftrue type; }; | |
2120 | ||
2121 | // Partial specialization for false. | |
2122 | template<typename _Iftrue, typename _Iffalse> | |
2123 | struct conditional<false, _Iftrue, _Iffalse> | |
2124 | { typedef _Iffalse type; }; | |
2125 | ||
5b9daa7e | 2126 | /// common_type |
cfa9a96b CF |
2127 | template<typename... _Tp> |
2128 | struct common_type; | |
2129 | ||
c0ffa2ba | 2130 | // Sfinae-friendly common_type implementation: |
b3618b71 DK |
2131 | |
2132 | struct __do_common_type_impl | |
2133 | { | |
2134 | template<typename _Tp, typename _Up> | |
6c5173c0 | 2135 | static __success_type<typename decay<decltype |
fe4e4e3b | 2136 | (true ? std::declval<_Tp>() |
6c5173c0 | 2137 | : std::declval<_Up>())>::type> _S_test(int); |
b3618b71 DK |
2138 | |
2139 | template<typename, typename> | |
2140 | static __failure_type _S_test(...); | |
2141 | }; | |
2142 | ||
2143 | template<typename _Tp, typename _Up> | |
2144 | struct __common_type_impl | |
2145 | : private __do_common_type_impl | |
2146 | { | |
2147 | typedef decltype(_S_test<_Tp, _Up>(0)) type; | |
2148 | }; | |
2149 | ||
2150 | struct __do_member_type_wrapper | |
2151 | { | |
2152 | template<typename _Tp> | |
2153 | static __success_type<typename _Tp::type> _S_test(int); | |
2154 | ||
2155 | template<typename> | |
2156 | static __failure_type _S_test(...); | |
2157 | }; | |
2158 | ||
2159 | template<typename _Tp> | |
2160 | struct __member_type_wrapper | |
2161 | : private __do_member_type_wrapper | |
2162 | { | |
2163 | typedef decltype(_S_test<_Tp>(0)) type; | |
2164 | }; | |
2165 | ||
2166 | template<typename _CTp, typename... _Args> | |
2167 | struct __expanded_common_type_wrapper | |
2168 | { | |
2169 | typedef common_type<typename _CTp::type, _Args...> type; | |
2170 | }; | |
2171 | ||
2172 | template<typename... _Args> | |
2173 | struct __expanded_common_type_wrapper<__failure_type, _Args...> | |
2174 | { typedef __failure_type type; }; | |
2175 | ||
cfa9a96b CF |
2176 | template<typename _Tp> |
2177 | struct common_type<_Tp> | |
6c5173c0 | 2178 | { typedef typename decay<_Tp>::type type; }; |
cfa9a96b CF |
2179 | |
2180 | template<typename _Tp, typename _Up> | |
7274deff | 2181 | struct common_type<_Tp, _Up> |
b3618b71 DK |
2182 | : public __common_type_impl<_Tp, _Up>::type |
2183 | { }; | |
cfa9a96b CF |
2184 | |
2185 | template<typename _Tp, typename _Up, typename... _Vp> | |
2186 | struct common_type<_Tp, _Up, _Vp...> | |
b3618b71 DK |
2187 | : public __expanded_common_type_wrapper<typename __member_type_wrapper< |
2188 | common_type<_Tp, _Up>>::type, _Vp...>::type | |
2189 | { }; | |
7274deff | 2190 | |
13901e4b | 2191 | /// The underlying type of an enum. |
a47407f6 PC |
2192 | template<typename _Tp> |
2193 | struct underlying_type | |
2194 | { | |
2195 | typedef __underlying_type(_Tp) type; | |
2196 | }; | |
123c516a | 2197 | |
7274deff PC |
2198 | template<typename _Tp> |
2199 | struct __declval_protector | |
2200 | { | |
2201 | static const bool __stop = false; | |
2202 | static typename add_rvalue_reference<_Tp>::type __delegate(); | |
2203 | }; | |
2204 | ||
2205 | template<typename _Tp> | |
2206 | inline typename add_rvalue_reference<_Tp>::type | |
e4f32cb0 | 2207 | declval() noexcept |
7274deff PC |
2208 | { |
2209 | static_assert(__declval_protector<_Tp>::__stop, | |
2210 | "declval() must not be used!"); | |
2211 | return __declval_protector<_Tp>::__delegate(); | |
2212 | } | |
1041daba | 2213 | |
be7f7822 JW |
2214 | /// result_of |
2215 | template<typename _Signature> | |
2216 | class result_of; | |
2217 | ||
c0ffa2ba | 2218 | // Sfinae-friendly result_of implementation: |
83ddb39f | 2219 | |
a15f7cb8 ESR |
2220 | #define __cpp_lib_result_of_sfinae 201210 |
2221 | ||
83ddb39f DK |
2222 | // [func.require] paragraph 1 bullet 1: |
2223 | struct __result_of_memfun_ref_impl | |
2224 | { | |
2225 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2226 | static __success_type<decltype( | |
2227 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) | |
2228 | )> _S_test(int); | |
2229 | ||
2230 | template<typename...> | |
2231 | static __failure_type _S_test(...); | |
2232 | }; | |
2233 | ||
2234 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2235 | struct __result_of_memfun_ref | |
2236 | : private __result_of_memfun_ref_impl | |
2237 | { | |
2238 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2239 | }; | |
2240 | ||
2241 | // [func.require] paragraph 1 bullet 2: | |
2242 | struct __result_of_memfun_deref_impl | |
2243 | { | |
2244 | template<typename _Fp, typename _Tp1, typename... _Args> | |
2245 | static __success_type<decltype( | |
2246 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) | |
2247 | )> _S_test(int); | |
2248 | ||
2249 | template<typename...> | |
2250 | static __failure_type _S_test(...); | |
2251 | }; | |
2252 | ||
2253 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2254 | struct __result_of_memfun_deref | |
2255 | : private __result_of_memfun_deref_impl | |
2256 | { | |
2257 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2258 | }; | |
2259 | ||
2260 | // [func.require] paragraph 1 bullet 3: | |
2261 | struct __result_of_memobj_ref_impl | |
2262 | { | |
2263 | template<typename _Fp, typename _Tp1> | |
2264 | static __success_type<decltype( | |
2265 | std::declval<_Tp1>().*std::declval<_Fp>() | |
2266 | )> _S_test(int); | |
2267 | ||
2268 | template<typename, typename> | |
2269 | static __failure_type _S_test(...); | |
2270 | }; | |
2271 | ||
2272 | template<typename _MemPtr, typename _Arg> | |
2273 | struct __result_of_memobj_ref | |
2274 | : private __result_of_memobj_ref_impl | |
2275 | { | |
2276 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2277 | }; | |
2278 | ||
2279 | // [func.require] paragraph 1 bullet 4: | |
2280 | struct __result_of_memobj_deref_impl | |
2281 | { | |
2282 | template<typename _Fp, typename _Tp1> | |
2283 | static __success_type<decltype( | |
2284 | (*std::declval<_Tp1>()).*std::declval<_Fp>() | |
2285 | )> _S_test(int); | |
2286 | ||
2287 | template<typename, typename> | |
2288 | static __failure_type _S_test(...); | |
2289 | }; | |
2290 | ||
be7f7822 | 2291 | template<typename _MemPtr, typename _Arg> |
83ddb39f DK |
2292 | struct __result_of_memobj_deref |
2293 | : private __result_of_memobj_deref_impl | |
2294 | { | |
2295 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2296 | }; | |
2297 | ||
2298 | template<typename _MemPtr, typename _Arg> | |
2299 | struct __result_of_memobj; | |
be7f7822 JW |
2300 | |
2301 | template<typename _Res, typename _Class, typename _Arg> | |
83ddb39f | 2302 | struct __result_of_memobj<_Res _Class::*, _Arg> |
be7f7822 | 2303 | { |
83ddb39f DK |
2304 | typedef typename remove_cv<typename remove_reference< |
2305 | _Arg>::type>::type _Argval; | |
2306 | typedef _Res _Class::* _MemPtr; | |
2307 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2308 | is_base_of<_Class, _Argval>>::value, | |
2309 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2310 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2311 | >::type::type type; | |
be7f7822 JW |
2312 | }; |
2313 | ||
83ddb39f DK |
2314 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2315 | struct __result_of_memfun; | |
be7f7822 JW |
2316 | |
2317 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
83ddb39f | 2318 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
be7f7822 | 2319 | { |
83ddb39f DK |
2320 | typedef typename remove_cv<typename remove_reference< |
2321 | _Arg>::type>::type _Argval; | |
2322 | typedef _Res _Class::* _MemPtr; | |
2323 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2324 | is_base_of<_Class, _Argval>>::value, | |
2325 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, | |
2326 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2327 | >::type::type type; | |
be7f7822 JW |
2328 | }; |
2329 | ||
2330 | template<bool, bool, typename _Functor, typename... _ArgTypes> | |
83ddb39f | 2331 | struct __result_of_impl |
be7f7822 | 2332 | { |
83ddb39f | 2333 | typedef __failure_type type; |
be7f7822 JW |
2334 | }; |
2335 | ||
2336 | template<typename _MemPtr, typename _Arg> | |
83ddb39f DK |
2337 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
2338 | : public __result_of_memobj<typename decay<_MemPtr>::type, _Arg> | |
c4db9a77 | 2339 | { }; |
be7f7822 | 2340 | |
83ddb39f DK |
2341 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2342 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
2343 | : public __result_of_memfun<typename decay<_MemPtr>::type, _Arg, _Args...> | |
c4db9a77 | 2344 | { }; |
be7f7822 | 2345 | |
83ddb39f DK |
2346 | // [func.require] paragraph 1 bullet 5: |
2347 | struct __result_of_other_impl | |
2348 | { | |
2349 | template<typename _Fn, typename... _Args> | |
2350 | static __success_type<decltype( | |
2351 | std::declval<_Fn>()(std::declval<_Args>()...) | |
2352 | )> _S_test(int); | |
2353 | ||
2354 | template<typename...> | |
2355 | static __failure_type _S_test(...); | |
2356 | }; | |
2357 | ||
be7f7822 | 2358 | template<typename _Functor, typename... _ArgTypes> |
83ddb39f DK |
2359 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2360 | : private __result_of_other_impl | |
be7f7822 | 2361 | { |
83ddb39f | 2362 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
be7f7822 JW |
2363 | }; |
2364 | ||
83ddb39f DK |
2365 | template<typename _Functor, typename... _ArgTypes> |
2366 | struct result_of<_Functor(_ArgTypes...)> | |
2367 | : public __result_of_impl< | |
2368 | is_member_object_pointer< | |
2369 | typename remove_reference<_Functor>::type | |
2370 | >::value, | |
2371 | is_member_function_pointer< | |
2372 | typename remove_reference<_Functor>::type | |
2373 | >::value, | |
2374 | _Functor, _ArgTypes... | |
2375 | >::type | |
2376 | { }; | |
c0ffa2ba | 2377 | |
4457e88c JW |
2378 | #if __cplusplus > 201103L |
2379 | /// Alias template for aligned_storage | |
2380 | template<size_t _Len, size_t _Align = | |
2381 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2382 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2383 | ||
d3718027 RS |
2384 | template <size_t _Len, typename... _Types> |
2385 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2386 | ||
4457e88c JW |
2387 | /// Alias template for decay |
2388 | template<typename _Tp> | |
2389 | using decay_t = typename decay<_Tp>::type; | |
2390 | ||
2391 | /// Alias template for enable_if | |
2392 | template<bool _Cond, typename _Tp = void> | |
2393 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2394 | ||
2395 | /// Alias template for conditional | |
2396 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2397 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2398 | ||
2399 | /// Alias template for common_type | |
2400 | template<typename... _Tp> | |
2401 | using common_type_t = typename common_type<_Tp...>::type; | |
2402 | ||
2403 | /// Alias template for underlying_type | |
2404 | template<typename _Tp> | |
2405 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2406 | ||
2407 | /// Alias template for result_of | |
2408 | template<typename _Tp> | |
2409 | using result_of_t = typename result_of<_Tp>::type; | |
2410 | #endif | |
2411 | ||
847e9cf8 JW |
2412 | template<typename...> using __void_t = void; |
2413 | ||
bd1eb5e0 JW |
2414 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2415 | #define __cpp_lib_void_t 201411 | |
2416 | /// A metafunction that always yields void, used for detecting valid types. | |
2417 | template<typename...> using void_t = void; | |
2418 | #endif | |
2419 | ||
6af6bef4 JW |
2420 | /// Implementation of the detection idiom (negative case). |
2421 | template<typename _Default, typename _AlwaysVoid, | |
2422 | template<typename...> class _Op, typename... _Args> | |
2423 | struct __detector | |
2424 | { | |
2425 | using value_t = false_type; | |
2426 | using type = _Default; | |
2427 | }; | |
2428 | ||
2429 | /// Implementation of the detection idiom (positive case). | |
2430 | template<typename _Default, template<typename...> class _Op, | |
2431 | typename... _Args> | |
2432 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2433 | { | |
2434 | using value_t = true_type; | |
2435 | using type = _Op<_Args...>; | |
2436 | }; | |
2437 | ||
2438 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2439 | template<typename _Default, template<typename...> class _Op, | |
2440 | typename... _Args> | |
2441 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2442 | ||
2443 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2444 | template<typename _Default, template<typename...> class _Op, | |
2445 | typename... _Args> | |
2446 | using __detected_or_t | |
2447 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2448 | ||
2449 | // _Op<_Args...> if that is a valid type, otherwise _Default<_Args...>. | |
2450 | template<template<typename...> class _Default, | |
2451 | template<typename...> class _Op, typename... _Args> | |
2452 | using __detected_or_t_ = | |
2453 | __detected_or_t<_Default<_Args...>, _Op, _Args...>; | |
2454 | ||
c0ffa2ba | 2455 | /// @} group metaprogramming |
847e9cf8 | 2456 | |
033b71ce PC |
2457 | /** |
2458 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2459 | * member type _NTYPE. | |
2460 | */ | |
82b12c4b | 2461 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
847e9cf8 | 2462 | template<typename _Tp, typename = __void_t<>> \ |
82b12c4b | 2463 | struct __has_##_NTYPE \ |
847e9cf8 JW |
2464 | : false_type \ |
2465 | { }; \ | |
2466 | template<typename _Tp> \ | |
2467 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2468 | : true_type \ | |
033b71ce PC |
2469 | { }; |
2470 | ||
ddb63209 VV |
2471 | |
2472 | namespace __is_swappable_impl { | |
2473 | template <typename _Tp, typename=void> | |
2474 | struct __is_swappable : public false_type | |
2475 | { }; | |
2476 | } | |
2477 | ||
2478 | template<typename _Tp> | |
2479 | inline | |
2480 | typename enable_if<__and_<is_move_constructible<_Tp>, | |
2481 | is_move_assignable<_Tp>>::value>::type | |
2482 | swap(_Tp&, _Tp&) | |
2483 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2484 | is_nothrow_move_assignable<_Tp>>::value); | |
2485 | ||
2486 | template<typename _Tp, size_t _Nm> | |
2487 | inline | |
2488 | typename enable_if<__is_swappable_impl::__is_swappable<_Tp>::value>::type | |
2489 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) | |
2490 | noexcept(noexcept(swap(*__a, *__b))); | |
2491 | ||
2492 | namespace __is_swappable_impl { | |
2493 | using std::swap; | |
2494 | ||
2495 | template <typename _Tp> | |
2496 | struct __is_swappable<_Tp, __void_t<decltype(swap(declval<_Tp&>(), | |
2497 | declval<_Tp&>()))>> | |
2498 | : public true_type | |
2499 | { }; | |
2500 | } | |
2501 | ||
2502 | template <bool, typename _Tp> | |
2503 | struct __is_nothrow_swappable_impl | |
2504 | : public __bool_constant<noexcept(swap(declval<_Tp&>(), declval<_Tp&>()))> | |
2505 | { }; | |
2506 | ||
2507 | template <typename _Tp> | |
2508 | struct __is_nothrow_swappable_impl<false, _Tp> : public false_type | |
2509 | { }; | |
2510 | ||
2511 | template <typename _Tp> | |
2512 | struct __is_nothrow_swappable | |
2513 | : public __is_nothrow_swappable_impl< | |
2514 | __is_swappable_impl::__is_swappable<_Tp>::value, _Tp> | |
2515 | { }; | |
2516 | ||
12ffa228 | 2517 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 2518 | } // namespace std |
7b50cdef | 2519 | |
734f5023 | 2520 | #endif // C++11 |
57317d2a | 2521 | |
7274deff | 2522 | #endif // _GLIBCXX_TYPE_TRAITS |