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8b3d154c | 1 | // C++11 <type_traits> -*- C++ -*- |
bec9a462 | 2 | |
fbd26352 | 3 | // Copyright (C) 2007-2019 Free Software Foundation, Inc. |
bec9a462 | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
bec9a462 | 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 | ||
6bc9506f | 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/>. | |
bec9a462 | 24 | |
25 | /** @file include/type_traits | |
26 | * This is a Standard C++ Library header. | |
27 | */ | |
28 | ||
8965c264 | 29 | #ifndef _GLIBCXX_TYPE_TRAITS |
30 | #define _GLIBCXX_TYPE_TRAITS 1 | |
bec9a462 | 31 | |
32 | #pragma GCC system_header | |
33 | ||
0c8766b1 | 34 | #if __cplusplus < 201103L |
d5ad42a1 | 35 | # include <bits/c++0x_warning.h> |
34e94b7c | 36 | #else |
bec9a462 | 37 | |
e4bb1925 | 38 | #include <bits/c++config.h> |
c17b0a1c | 39 | |
2bf8460e | 40 | namespace std _GLIBCXX_VISIBILITY(default) |
41 | { | |
42 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
43 | ||
73337dee | 44 | /** |
8b3d154c | 45 | * @defgroup metaprogramming Metaprogramming |
3598538c | 46 | * @ingroup utilities |
47 | * | |
48 | * Template utilities for compile-time introspection and modification, | |
49 | * including type classification traits, type property inspection traits | |
50 | * and type transformation traits. | |
51 | * | |
97a32de0 | 52 | * @{ |
53 | */ | |
1db85ffb | 54 | |
55 | /// integral_constant | |
56 | template<typename _Tp, _Tp __v> | |
57 | struct integral_constant | |
58 | { | |
59 | static constexpr _Tp value = __v; | |
60 | typedef _Tp value_type; | |
61 | typedef integral_constant<_Tp, __v> type; | |
962c2793 | 62 | constexpr operator value_type() const noexcept { return value; } |
b82f961e | 63 | #if __cplusplus > 201103L |
f6751ff2 | 64 | |
65 | #define __cpp_lib_integral_constant_callable 201304 | |
66 | ||
962c2793 | 67 | constexpr value_type operator()() const noexcept { return value; } |
b82f961e | 68 | #endif |
1db85ffb | 69 | }; |
fb809cfc | 70 | |
8b3d154c | 71 | template<typename _Tp, _Tp __v> |
72 | constexpr _Tp integral_constant<_Tp, __v>::value; | |
73 | ||
3598538c | 74 | /// The type used as a compile-time boolean with true value. |
1db85ffb | 75 | typedef integral_constant<bool, true> true_type; |
76 | ||
3598538c | 77 | /// The type used as a compile-time boolean with false value. |
1db85ffb | 78 | typedef integral_constant<bool, false> false_type; |
79 | ||
a228eb3e | 80 | template<bool __v> |
81 | using __bool_constant = integral_constant<bool, __v>; | |
82 | ||
d51560f9 | 83 | #if __cplusplus > 201402L |
d05226d5 | 84 | # define __cpp_lib_bool_constant 201505 |
d51560f9 | 85 | template<bool __v> |
86 | using bool_constant = integral_constant<bool, __v>; | |
87 | #endif | |
88 | ||
29928af2 | 89 | // Meta programming helper types. |
5022cf3f | 90 | |
29928af2 | 91 | template<bool, typename, typename> |
92 | struct conditional; | |
5022cf3f | 93 | |
27b4e857 | 94 | template<typename...> |
29928af2 | 95 | struct __or_; |
96 | ||
1db85ffb | 97 | template<> |
98 | struct __or_<> | |
99 | : public false_type | |
100 | { }; | |
101 | ||
27b4e857 | 102 | template<typename _B1> |
103 | struct __or_<_B1> | |
104 | : public _B1 | |
105 | { }; | |
106 | ||
29928af2 | 107 | template<typename _B1, typename _B2> |
108 | struct __or_<_B1, _B2> | |
109 | : public conditional<_B1::value, _B1, _B2>::type | |
110 | { }; | |
111 | ||
112 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
113 | struct __or_<_B1, _B2, _B3, _Bn...> | |
114 | : public conditional<_B1::value, _B1, __or_<_B2, _B3, _Bn...>>::type | |
115 | { }; | |
5022cf3f | 116 | |
27b4e857 | 117 | template<typename...> |
29928af2 | 118 | struct __and_; |
5022cf3f | 119 | |
1db85ffb | 120 | template<> |
121 | struct __and_<> | |
122 | : public true_type | |
123 | { }; | |
124 | ||
27b4e857 | 125 | template<typename _B1> |
126 | struct __and_<_B1> | |
127 | : public _B1 | |
128 | { }; | |
129 | ||
29928af2 | 130 | template<typename _B1, typename _B2> |
131 | struct __and_<_B1, _B2> | |
132 | : public conditional<_B1::value, _B2, _B1>::type | |
133 | { }; | |
134 | ||
135 | template<typename _B1, typename _B2, typename _B3, typename... _Bn> | |
136 | struct __and_<_B1, _B2, _B3, _Bn...> | |
137 | : public conditional<_B1::value, __and_<_B2, _B3, _Bn...>, _B1>::type | |
138 | { }; | |
139 | ||
140 | template<typename _Pp> | |
141 | struct __not_ | |
366595fd | 142 | : public __bool_constant<!bool(_Pp::value)> |
29928af2 | 143 | { }; |
144 | ||
366595fd | 145 | #if __cplusplus >= 201703L |
888a21cd | 146 | |
d3a3029c | 147 | template<typename... _Bn> |
148 | inline constexpr bool __or_v = __or_<_Bn...>::value; | |
149 | template<typename... _Bn> | |
150 | inline constexpr bool __and_v = __and_<_Bn...>::value; | |
151 | ||
3b63bab2 | 152 | #define __cpp_lib_logical_traits 201510 |
888a21cd | 153 | |
154 | template<typename... _Bn> | |
155 | struct conjunction | |
156 | : __and_<_Bn...> | |
157 | { }; | |
158 | ||
159 | template<typename... _Bn> | |
160 | struct disjunction | |
161 | : __or_<_Bn...> | |
162 | { }; | |
163 | ||
164 | template<typename _Pp> | |
165 | struct negation | |
166 | : __not_<_Pp> | |
167 | { }; | |
1615843f | 168 | |
169 | template<typename... _Bn> | |
366595fd | 170 | inline constexpr bool conjunction_v = conjunction<_Bn...>::value; |
93a31400 | 171 | |
1615843f | 172 | template<typename... _Bn> |
366595fd | 173 | inline constexpr bool disjunction_v = disjunction<_Bn...>::value; |
93a31400 | 174 | |
1615843f | 175 | template<typename _Pp> |
366595fd | 176 | inline constexpr bool negation_v = negation<_Pp>::value; |
1615843f | 177 | |
366595fd | 178 | #endif // C++17 |
888a21cd | 179 | |
7ee204d2 | 180 | // For several sfinae-friendly trait implementations we transport both the |
181 | // result information (as the member type) and the failure information (no | |
182 | // member type). This is very similar to std::enable_if, but we cannot use | |
183 | // them, because we need to derive from them as an implementation detail. | |
184 | ||
185 | template<typename _Tp> | |
186 | struct __success_type | |
187 | { typedef _Tp type; }; | |
188 | ||
189 | struct __failure_type | |
190 | { }; | |
191 | ||
8b3d154c | 192 | // Primary type categories. |
29928af2 | 193 | |
5022cf3f | 194 | template<typename> |
195 | struct remove_cv; | |
196 | ||
197 | template<typename> | |
198 | struct __is_void_helper | |
199 | : public false_type { }; | |
5022cf3f | 200 | |
29928af2 | 201 | template<> |
202 | struct __is_void_helper<void> | |
203 | : public true_type { }; | |
5022cf3f | 204 | |
205 | /// is_void | |
206 | template<typename _Tp> | |
207 | struct is_void | |
c6e805a7 | 208 | : public __is_void_helper<typename remove_cv<_Tp>::type>::type |
5022cf3f | 209 | { }; |
210 | ||
211 | template<typename> | |
212 | struct __is_integral_helper | |
213 | : public false_type { }; | |
29928af2 | 214 | |
215 | template<> | |
216 | struct __is_integral_helper<bool> | |
217 | : public true_type { }; | |
fb809cfc | 218 | |
29928af2 | 219 | template<> |
220 | struct __is_integral_helper<char> | |
221 | : public true_type { }; | |
222 | ||
223 | template<> | |
224 | struct __is_integral_helper<signed char> | |
225 | : public true_type { }; | |
226 | ||
227 | template<> | |
228 | struct __is_integral_helper<unsigned char> | |
229 | : public true_type { }; | |
230 | ||
5022cf3f | 231 | #ifdef _GLIBCXX_USE_WCHAR_T |
29928af2 | 232 | template<> |
233 | struct __is_integral_helper<wchar_t> | |
234 | : public true_type { }; | |
5022cf3f | 235 | #endif |
29928af2 | 236 | |
25694c85 | 237 | #ifdef _GLIBCXX_USE_CHAR8_T |
238 | template<> | |
239 | struct __is_integral_helper<char8_t> | |
240 | : public true_type { }; | |
241 | #endif | |
242 | ||
29928af2 | 243 | template<> |
244 | struct __is_integral_helper<char16_t> | |
245 | : public true_type { }; | |
246 | ||
247 | template<> | |
248 | struct __is_integral_helper<char32_t> | |
249 | : public true_type { }; | |
250 | ||
251 | template<> | |
252 | struct __is_integral_helper<short> | |
253 | : public true_type { }; | |
254 | ||
255 | template<> | |
256 | struct __is_integral_helper<unsigned short> | |
257 | : public true_type { }; | |
258 | ||
259 | template<> | |
260 | struct __is_integral_helper<int> | |
261 | : public true_type { }; | |
262 | ||
263 | template<> | |
264 | struct __is_integral_helper<unsigned int> | |
265 | : public true_type { }; | |
266 | ||
267 | template<> | |
268 | struct __is_integral_helper<long> | |
269 | : public true_type { }; | |
270 | ||
271 | template<> | |
272 | struct __is_integral_helper<unsigned long> | |
273 | : public true_type { }; | |
274 | ||
275 | template<> | |
276 | struct __is_integral_helper<long long> | |
277 | : public true_type { }; | |
278 | ||
279 | template<> | |
280 | struct __is_integral_helper<unsigned long long> | |
281 | : public true_type { }; | |
5022cf3f | 282 | |
9f75f026 | 283 | // Conditionalizing on __STRICT_ANSI__ here will break any port that |
284 | // uses one of these types for size_t. | |
285 | #if defined(__GLIBCXX_TYPE_INT_N_0) | |
a3ee70c2 | 286 | template<> |
9f75f026 | 287 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0> |
a3ee70c2 | 288 | : public true_type { }; |
289 | ||
290 | template<> | |
9f75f026 | 291 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0> |
292 | : public true_type { }; | |
293 | #endif | |
294 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
295 | template<> | |
296 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1> | |
297 | : public true_type { }; | |
298 | ||
299 | template<> | |
300 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1> | |
301 | : public true_type { }; | |
302 | #endif | |
303 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
304 | template<> | |
305 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2> | |
306 | : public true_type { }; | |
307 | ||
308 | template<> | |
309 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2> | |
310 | : public true_type { }; | |
311 | #endif | |
312 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
313 | template<> | |
314 | struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3> | |
315 | : public true_type { }; | |
316 | ||
317 | template<> | |
318 | struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3> | |
a3ee70c2 | 319 | : public true_type { }; |
320 | #endif | |
321 | ||
5022cf3f | 322 | /// is_integral |
323 | template<typename _Tp> | |
324 | struct is_integral | |
c6e805a7 | 325 | : public __is_integral_helper<typename remove_cv<_Tp>::type>::type |
5022cf3f | 326 | { }; |
327 | ||
328 | template<typename> | |
329 | struct __is_floating_point_helper | |
330 | : public false_type { }; | |
29928af2 | 331 | |
332 | template<> | |
333 | struct __is_floating_point_helper<float> | |
334 | : public true_type { }; | |
335 | ||
336 | template<> | |
337 | struct __is_floating_point_helper<double> | |
338 | : public true_type { }; | |
339 | ||
340 | template<> | |
341 | struct __is_floating_point_helper<long double> | |
342 | : public true_type { }; | |
5022cf3f | 343 | |
a3ee70c2 | 344 | #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
345 | template<> | |
346 | struct __is_floating_point_helper<__float128> | |
347 | : public true_type { }; | |
348 | #endif | |
349 | ||
5022cf3f | 350 | /// is_floating_point |
351 | template<typename _Tp> | |
352 | struct is_floating_point | |
c6e805a7 | 353 | : public __is_floating_point_helper<typename remove_cv<_Tp>::type>::type |
5022cf3f | 354 | { }; |
355 | ||
356 | /// is_array | |
357 | template<typename> | |
358 | struct is_array | |
359 | : public false_type { }; | |
360 | ||
361 | template<typename _Tp, std::size_t _Size> | |
362 | struct is_array<_Tp[_Size]> | |
363 | : public true_type { }; | |
364 | ||
365 | template<typename _Tp> | |
366 | struct is_array<_Tp[]> | |
367 | : public true_type { }; | |
368 | ||
369 | template<typename> | |
370 | struct __is_pointer_helper | |
371 | : public false_type { }; | |
29928af2 | 372 | |
373 | template<typename _Tp> | |
374 | struct __is_pointer_helper<_Tp*> | |
375 | : public true_type { }; | |
5022cf3f | 376 | |
377 | /// is_pointer | |
378 | template<typename _Tp> | |
379 | struct is_pointer | |
c6e805a7 | 380 | : public __is_pointer_helper<typename remove_cv<_Tp>::type>::type |
5022cf3f | 381 | { }; |
382 | ||
29928af2 | 383 | /// is_lvalue_reference |
384 | template<typename> | |
385 | struct is_lvalue_reference | |
386 | : public false_type { }; | |
387 | ||
5022cf3f | 388 | template<typename _Tp> |
29928af2 | 389 | struct is_lvalue_reference<_Tp&> |
390 | : public true_type { }; | |
391 | ||
392 | /// is_rvalue_reference | |
393 | template<typename> | |
394 | struct is_rvalue_reference | |
395 | : public false_type { }; | |
5022cf3f | 396 | |
5022cf3f | 397 | template<typename _Tp> |
29928af2 | 398 | struct is_rvalue_reference<_Tp&&> |
399 | : public true_type { }; | |
400 | ||
401 | template<typename> | |
5022cf3f | 402 | struct is_function; |
403 | ||
404 | template<typename> | |
405 | struct __is_member_object_pointer_helper | |
406 | : public false_type { }; | |
29928af2 | 407 | |
408 | template<typename _Tp, typename _Cp> | |
409 | struct __is_member_object_pointer_helper<_Tp _Cp::*> | |
1c7a3c47 | 410 | : public __not_<is_function<_Tp>>::type { }; |
5022cf3f | 411 | |
412 | /// is_member_object_pointer | |
413 | template<typename _Tp> | |
414 | struct is_member_object_pointer | |
c6e805a7 | 415 | : public __is_member_object_pointer_helper< |
416 | typename remove_cv<_Tp>::type>::type | |
5022cf3f | 417 | { }; |
418 | ||
419 | template<typename> | |
420 | struct __is_member_function_pointer_helper | |
421 | : public false_type { }; | |
29928af2 | 422 | |
423 | template<typename _Tp, typename _Cp> | |
424 | struct __is_member_function_pointer_helper<_Tp _Cp::*> | |
1c7a3c47 | 425 | : public is_function<_Tp>::type { }; |
5022cf3f | 426 | |
427 | /// is_member_function_pointer | |
428 | template<typename _Tp> | |
429 | struct is_member_function_pointer | |
c6e805a7 | 430 | : public __is_member_function_pointer_helper< |
431 | typename remove_cv<_Tp>::type>::type | |
5022cf3f | 432 | { }; |
433 | ||
434 | /// is_enum | |
435 | template<typename _Tp> | |
436 | struct is_enum | |
437 | : public integral_constant<bool, __is_enum(_Tp)> | |
438 | { }; | |
439 | ||
440 | /// is_union | |
441 | template<typename _Tp> | |
442 | struct is_union | |
443 | : public integral_constant<bool, __is_union(_Tp)> | |
444 | { }; | |
445 | ||
446 | /// is_class | |
447 | template<typename _Tp> | |
448 | struct is_class | |
449 | : public integral_constant<bool, __is_class(_Tp)> | |
450 | { }; | |
451 | ||
452 | /// is_function | |
453 | template<typename> | |
454 | struct is_function | |
455 | : public false_type { }; | |
29928af2 | 456 | |
2e9e9363 | 457 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
458 | struct is_function<_Res(_ArgTypes...) _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 459 | : public true_type { }; |
29928af2 | 460 | |
2e9e9363 | 461 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
462 | struct is_function<_Res(_ArgTypes...) & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 463 | : public true_type { }; |
464 | ||
2e9e9363 | 465 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
466 | struct is_function<_Res(_ArgTypes...) && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 467 | : public true_type { }; |
468 | ||
2e9e9363 | 469 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
470 | struct is_function<_Res(_ArgTypes......) _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 471 | : public true_type { }; |
29928af2 | 472 | |
2e9e9363 | 473 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
474 | struct is_function<_Res(_ArgTypes......) & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 475 | : public true_type { }; |
476 | ||
2e9e9363 | 477 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
478 | struct is_function<_Res(_ArgTypes......) && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 479 | : public true_type { }; |
480 | ||
2e9e9363 | 481 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
482 | struct is_function<_Res(_ArgTypes...) const _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 483 | : public true_type { }; |
29928af2 | 484 | |
2e9e9363 | 485 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
486 | struct is_function<_Res(_ArgTypes...) const & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 487 | : public true_type { }; |
488 | ||
2e9e9363 | 489 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
490 | struct is_function<_Res(_ArgTypes...) const && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 491 | : public true_type { }; |
492 | ||
2e9e9363 | 493 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
494 | struct is_function<_Res(_ArgTypes......) const _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 495 | : public true_type { }; |
29928af2 | 496 | |
2e9e9363 | 497 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
498 | struct is_function<_Res(_ArgTypes......) const & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 499 | : public true_type { }; |
500 | ||
2e9e9363 | 501 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
502 | struct is_function<_Res(_ArgTypes......) const && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 503 | : public true_type { }; |
504 | ||
2e9e9363 | 505 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
506 | struct is_function<_Res(_ArgTypes...) volatile _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 507 | : public true_type { }; |
29928af2 | 508 | |
2e9e9363 | 509 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
510 | struct is_function<_Res(_ArgTypes...) volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 511 | : public true_type { }; |
512 | ||
2e9e9363 | 513 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
514 | struct is_function<_Res(_ArgTypes...) volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 515 | : public true_type { }; |
516 | ||
2e9e9363 | 517 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
518 | struct is_function<_Res(_ArgTypes......) volatile _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 519 | : public true_type { }; |
29928af2 | 520 | |
2e9e9363 | 521 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
522 | struct is_function<_Res(_ArgTypes......) volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 523 | : public true_type { }; |
524 | ||
2e9e9363 | 525 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
526 | struct is_function<_Res(_ArgTypes......) volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 527 | : public true_type { }; |
528 | ||
2e9e9363 | 529 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
530 | struct is_function<_Res(_ArgTypes...) const volatile _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 531 | : public true_type { }; |
29928af2 | 532 | |
2e9e9363 | 533 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
534 | struct is_function<_Res(_ArgTypes...) const volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 535 | : public true_type { }; |
536 | ||
2e9e9363 | 537 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
538 | struct is_function<_Res(_ArgTypes...) const volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 539 | : public true_type { }; |
540 | ||
2e9e9363 | 541 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
542 | struct is_function<_Res(_ArgTypes......) const volatile _GLIBCXX_NOEXCEPT_QUAL> | |
5022cf3f | 543 | : public true_type { }; |
544 | ||
2e9e9363 | 545 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
546 | struct is_function<_Res(_ArgTypes......) const volatile & _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 547 | : public true_type { }; |
548 | ||
2e9e9363 | 549 | template<typename _Res, typename... _ArgTypes _GLIBCXX_NOEXCEPT_PARM> |
550 | struct is_function<_Res(_ArgTypes......) const volatile && _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 551 | : public true_type { }; |
552 | ||
f6751ff2 | 553 | #define __cpp_lib_is_null_pointer 201309 |
554 | ||
d49765ee | 555 | template<typename> |
1ac9f544 | 556 | struct __is_null_pointer_helper |
d49765ee | 557 | : public false_type { }; |
29928af2 | 558 | |
559 | template<> | |
1ac9f544 | 560 | struct __is_null_pointer_helper<std::nullptr_t> |
29928af2 | 561 | : public true_type { }; |
d49765ee | 562 | |
1ac9f544 | 563 | /// is_null_pointer (LWG 2247). |
564 | template<typename _Tp> | |
565 | struct is_null_pointer | |
566 | : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type | |
567 | { }; | |
568 | ||
569 | /// __is_nullptr_t (extension). | |
d49765ee | 570 | template<typename _Tp> |
571 | struct __is_nullptr_t | |
1ac9f544 | 572 | : public is_null_pointer<_Tp> |
d49765ee | 573 | { }; |
574 | ||
8b3d154c | 575 | // Composite type categories. |
29928af2 | 576 | |
577 | /// is_reference | |
578 | template<typename _Tp> | |
579 | struct is_reference | |
580 | : public __or_<is_lvalue_reference<_Tp>, | |
581 | is_rvalue_reference<_Tp>>::type | |
582 | { }; | |
583 | ||
5022cf3f | 584 | /// is_arithmetic |
585 | template<typename _Tp> | |
586 | struct is_arithmetic | |
29928af2 | 587 | : public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type |
5022cf3f | 588 | { }; |
589 | ||
590 | /// is_fundamental | |
591 | template<typename _Tp> | |
592 | struct is_fundamental | |
1ac9f544 | 593 | : public __or_<is_arithmetic<_Tp>, is_void<_Tp>, |
594 | is_null_pointer<_Tp>>::type | |
5022cf3f | 595 | { }; |
596 | ||
597 | /// is_object | |
598 | template<typename _Tp> | |
599 | struct is_object | |
29928af2 | 600 | : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>, |
601 | is_void<_Tp>>>::type | |
5022cf3f | 602 | { }; |
603 | ||
29928af2 | 604 | template<typename> |
5022cf3f | 605 | struct is_member_pointer; |
606 | ||
607 | /// is_scalar | |
608 | template<typename _Tp> | |
609 | struct is_scalar | |
29928af2 | 610 | : public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>, |
1ac9f544 | 611 | is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type |
5022cf3f | 612 | { }; |
613 | ||
614 | /// is_compound | |
615 | template<typename _Tp> | |
616 | struct is_compound | |
1c7a3c47 | 617 | : public __not_<is_fundamental<_Tp>>::type { }; |
5022cf3f | 618 | |
5022cf3f | 619 | template<typename _Tp> |
620 | struct __is_member_pointer_helper | |
621 | : public false_type { }; | |
29928af2 | 622 | |
623 | template<typename _Tp, typename _Cp> | |
624 | struct __is_member_pointer_helper<_Tp _Cp::*> | |
625 | : public true_type { }; | |
5022cf3f | 626 | |
3598538c | 627 | /// is_member_pointer |
5022cf3f | 628 | template<typename _Tp> |
29928af2 | 629 | struct is_member_pointer |
c6e805a7 | 630 | : public __is_member_pointer_helper<typename remove_cv<_Tp>::type>::type |
5022cf3f | 631 | { }; |
632 | ||
2fa630fb | 633 | // Utility to detect referenceable types ([defns.referenceable]). |
634 | ||
635 | template<typename _Tp> | |
636 | struct __is_referenceable | |
637 | : public __or_<is_object<_Tp>, is_reference<_Tp>>::type | |
638 | { }; | |
639 | ||
cf98635a | 640 | template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM> |
641 | struct __is_referenceable<_Res(_Args...) _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 642 | : public true_type |
643 | { }; | |
644 | ||
cf98635a | 645 | template<typename _Res, typename... _Args _GLIBCXX_NOEXCEPT_PARM> |
646 | struct __is_referenceable<_Res(_Args......) _GLIBCXX_NOEXCEPT_QUAL> | |
2fa630fb | 647 | : public true_type |
648 | { }; | |
649 | ||
8b3d154c | 650 | // Type properties. |
29928af2 | 651 | |
5022cf3f | 652 | /// is_const |
653 | template<typename> | |
654 | struct is_const | |
655 | : public false_type { }; | |
656 | ||
657 | template<typename _Tp> | |
658 | struct is_const<_Tp const> | |
659 | : public true_type { }; | |
fb809cfc | 660 | |
5022cf3f | 661 | /// is_volatile |
662 | template<typename> | |
663 | struct is_volatile | |
664 | : public false_type { }; | |
665 | ||
666 | template<typename _Tp> | |
667 | struct is_volatile<_Tp volatile> | |
668 | : public true_type { }; | |
669 | ||
29928af2 | 670 | /// is_trivial |
671 | template<typename _Tp> | |
672 | struct is_trivial | |
673 | : public integral_constant<bool, __is_trivial(_Tp)> | |
674 | { }; | |
675 | ||
285dc591 | 676 | // is_trivially_copyable |
677 | template<typename _Tp> | |
678 | struct is_trivially_copyable | |
679 | : public integral_constant<bool, __is_trivially_copyable(_Tp)> | |
680 | { }; | |
29928af2 | 681 | |
682 | /// is_standard_layout | |
683 | template<typename _Tp> | |
684 | struct is_standard_layout | |
685 | : public integral_constant<bool, __is_standard_layout(_Tp)> | |
686 | { }; | |
687 | ||
688 | /// is_pod | |
689 | // Could use is_standard_layout && is_trivial instead of the builtin. | |
690 | template<typename _Tp> | |
691 | struct is_pod | |
692 | : public integral_constant<bool, __is_pod(_Tp)> | |
693 | { }; | |
694 | ||
695 | /// is_literal_type | |
696 | template<typename _Tp> | |
697 | struct is_literal_type | |
698 | : public integral_constant<bool, __is_literal_type(_Tp)> | |
699 | { }; | |
700 | ||
5022cf3f | 701 | /// is_empty |
702 | template<typename _Tp> | |
703 | struct is_empty | |
704 | : public integral_constant<bool, __is_empty(_Tp)> | |
705 | { }; | |
706 | ||
707 | /// is_polymorphic | |
708 | template<typename _Tp> | |
709 | struct is_polymorphic | |
710 | : public integral_constant<bool, __is_polymorphic(_Tp)> | |
711 | { }; | |
712 | ||
61201452 | 713 | #if __cplusplus >= 201402L |
714 | #define __cpp_lib_is_final 201402L | |
715 | /// is_final | |
716 | template<typename _Tp> | |
717 | struct is_final | |
718 | : public integral_constant<bool, __is_final(_Tp)> | |
719 | { }; | |
720 | #endif | |
721 | ||
5022cf3f | 722 | /// is_abstract |
723 | template<typename _Tp> | |
724 | struct is_abstract | |
725 | : public integral_constant<bool, __is_abstract(_Tp)> | |
726 | { }; | |
727 | ||
29928af2 | 728 | template<typename _Tp, |
b1fd4b47 | 729 | bool = is_arithmetic<_Tp>::value> |
29928af2 | 730 | struct __is_signed_helper |
731 | : public false_type { }; | |
732 | ||
5022cf3f | 733 | template<typename _Tp> |
b1fd4b47 | 734 | struct __is_signed_helper<_Tp, true> |
735 | : public integral_constant<bool, _Tp(-1) < _Tp(0)> | |
5022cf3f | 736 | { }; |
737 | ||
29928af2 | 738 | /// is_signed |
5022cf3f | 739 | template<typename _Tp> |
29928af2 | 740 | struct is_signed |
c6e805a7 | 741 | : public __is_signed_helper<_Tp>::type |
29928af2 | 742 | { }; |
743 | ||
744 | /// is_unsigned | |
745 | template<typename _Tp> | |
746 | struct is_unsigned | |
610a7006 | 747 | : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>> |
29928af2 | 748 | { }; |
749 | ||
750 | ||
8b3d154c | 751 | // Destructible and constructible type properties. |
29928af2 | 752 | |
3598538c | 753 | /** |
754 | * @brief Utility to simplify expressions used in unevaluated operands | |
755 | * @ingroup utilities | |
756 | */ | |
e4bb5efb | 757 | |
758 | template<typename _Tp, typename _Up = _Tp&&> | |
759 | _Up | |
760 | __declval(int); | |
761 | ||
762 | template<typename _Tp> | |
763 | _Tp | |
764 | __declval(long); | |
765 | ||
5022cf3f | 766 | template<typename _Tp> |
e4bb5efb | 767 | auto declval() noexcept -> decltype(__declval<_Tp>(0)); |
5022cf3f | 768 | |
29928af2 | 769 | template<typename, unsigned = 0> |
770 | struct extent; | |
771 | ||
772 | template<typename> | |
773 | struct remove_all_extents; | |
774 | ||
775 | template<typename _Tp> | |
776 | struct __is_array_known_bounds | |
777 | : public integral_constant<bool, (extent<_Tp>::value > 0)> | |
5022cf3f | 778 | { }; |
779 | ||
29928af2 | 780 | template<typename _Tp> |
781 | struct __is_array_unknown_bounds | |
610a7006 | 782 | : public __and_<is_array<_Tp>, __not_<extent<_Tp>>> |
5022cf3f | 783 | { }; |
fb809cfc | 784 | |
be39fa57 | 785 | // In N3290 is_destructible does not say anything about function |
f525bf7f | 786 | // types and abstract types, see LWG 2049. This implementation |
be39fa57 | 787 | // describes function types as non-destructible and all complete |
788 | // object types as destructible, iff the explicit destructor | |
f525bf7f | 789 | // call expression is wellformed. |
be39fa57 | 790 | struct __do_is_destructible_impl |
29928af2 | 791 | { |
be39fa57 | 792 | template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())> |
29928af2 | 793 | static true_type __test(int); |
794 | ||
795 | template<typename> | |
796 | static false_type __test(...); | |
797 | }; | |
5022cf3f | 798 | |
799 | template<typename _Tp> | |
be39fa57 | 800 | struct __is_destructible_impl |
801 | : public __do_is_destructible_impl | |
29928af2 | 802 | { |
803 | typedef decltype(__test<_Tp>(0)) type; | |
804 | }; | |
5022cf3f | 805 | |
be39fa57 | 806 | template<typename _Tp, |
807 | bool = __or_<is_void<_Tp>, | |
808 | __is_array_unknown_bounds<_Tp>, | |
809 | is_function<_Tp>>::value, | |
810 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
811 | struct __is_destructible_safe; | |
812 | ||
813 | template<typename _Tp> | |
814 | struct __is_destructible_safe<_Tp, false, false> | |
815 | : public __is_destructible_impl<typename | |
816 | remove_all_extents<_Tp>::type>::type | |
817 | { }; | |
818 | ||
819 | template<typename _Tp> | |
820 | struct __is_destructible_safe<_Tp, true, false> | |
821 | : public false_type { }; | |
822 | ||
823 | template<typename _Tp> | |
824 | struct __is_destructible_safe<_Tp, false, true> | |
825 | : public true_type { }; | |
826 | ||
827 | /// is_destructible | |
828 | template<typename _Tp> | |
829 | struct is_destructible | |
c6e805a7 | 830 | : public __is_destructible_safe<_Tp>::type |
be39fa57 | 831 | { }; |
832 | ||
833 | // is_nothrow_destructible requires that is_destructible is | |
834 | // satisfied as well. We realize that by mimicing the | |
835 | // implementation of is_destructible but refer to noexcept(expr) | |
836 | // instead of decltype(expr). | |
837 | struct __do_is_nt_destructible_impl | |
29928af2 | 838 | { |
be39fa57 | 839 | template<typename _Tp> |
1c7a3c47 | 840 | static __bool_constant<noexcept(declval<_Tp&>().~_Tp())> |
841 | __test(int); | |
29928af2 | 842 | |
843 | template<typename> | |
844 | static false_type __test(...); | |
845 | }; | |
5022cf3f | 846 | |
5022cf3f | 847 | template<typename _Tp> |
be39fa57 | 848 | struct __is_nt_destructible_impl |
849 | : public __do_is_nt_destructible_impl | |
29928af2 | 850 | { |
851 | typedef decltype(__test<_Tp>(0)) type; | |
852 | }; | |
853 | ||
854 | template<typename _Tp, | |
855 | bool = __or_<is_void<_Tp>, | |
be39fa57 | 856 | __is_array_unknown_bounds<_Tp>, |
857 | is_function<_Tp>>::value, | |
858 | bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value> | |
859 | struct __is_nt_destructible_safe; | |
5022cf3f | 860 | |
861 | template<typename _Tp> | |
be39fa57 | 862 | struct __is_nt_destructible_safe<_Tp, false, false> |
863 | : public __is_nt_destructible_impl<typename | |
864 | remove_all_extents<_Tp>::type>::type | |
29928af2 | 865 | { }; |
866 | ||
5022cf3f | 867 | template<typename _Tp> |
be39fa57 | 868 | struct __is_nt_destructible_safe<_Tp, true, false> |
29928af2 | 869 | : public false_type { }; |
5022cf3f | 870 | |
871 | template<typename _Tp> | |
be39fa57 | 872 | struct __is_nt_destructible_safe<_Tp, false, true> |
29928af2 | 873 | : public true_type { }; |
874 | ||
be39fa57 | 875 | /// is_nothrow_destructible |
5022cf3f | 876 | template<typename _Tp> |
be39fa57 | 877 | struct is_nothrow_destructible |
c6e805a7 | 878 | : public __is_nt_destructible_safe<_Tp>::type |
29928af2 | 879 | { }; |
880 | ||
48328bff | 881 | /// is_constructible |
882 | template<typename _Tp, typename... _Args> | |
883 | struct is_constructible | |
884 | : public __bool_constant<__is_constructible(_Tp, _Args...)> | |
29928af2 | 885 | { }; |
ad4332ef | 886 | |
29928af2 | 887 | /// is_default_constructible |
ad4332ef | 888 | template<typename _Tp> |
29928af2 | 889 | struct is_default_constructible |
48328bff | 890 | : public is_constructible<_Tp>::type |
c1c67b4f | 891 | { }; |
892 | ||
2fa630fb | 893 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
505f943d | 894 | struct __is_copy_constructible_impl; |
29928af2 | 895 | |
505f943d | 896 | template<typename _Tp> |
2fa630fb | 897 | struct __is_copy_constructible_impl<_Tp, false> |
505f943d | 898 | : public false_type { }; |
899 | ||
900 | template<typename _Tp> | |
2fa630fb | 901 | struct __is_copy_constructible_impl<_Tp, true> |
505f943d | 902 | : public is_constructible<_Tp, const _Tp&> |
903 | { }; | |
904 | ||
905 | /// is_copy_constructible | |
906 | template<typename _Tp> | |
907 | struct is_copy_constructible | |
908 | : public __is_copy_constructible_impl<_Tp> | |
909 | { }; | |
910 | ||
2fa630fb | 911 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
505f943d | 912 | struct __is_move_constructible_impl; |
913 | ||
914 | template<typename _Tp> | |
2fa630fb | 915 | struct __is_move_constructible_impl<_Tp, false> |
505f943d | 916 | : public false_type { }; |
917 | ||
918 | template<typename _Tp> | |
2fa630fb | 919 | struct __is_move_constructible_impl<_Tp, true> |
505f943d | 920 | : public is_constructible<_Tp, _Tp&&> |
921 | { }; | |
922 | ||
923 | /// is_move_constructible | |
924 | template<typename _Tp> | |
925 | struct is_move_constructible | |
926 | : public __is_move_constructible_impl<_Tp> | |
927 | { }; | |
928 | ||
929 | template<typename _Tp> | |
930 | struct __is_nt_default_constructible_atom | |
931 | : public integral_constant<bool, noexcept(_Tp())> | |
932 | { }; | |
933 | ||
934 | template<typename _Tp, bool = is_array<_Tp>::value> | |
935 | struct __is_nt_default_constructible_impl; | |
936 | ||
937 | template<typename _Tp> | |
938 | struct __is_nt_default_constructible_impl<_Tp, true> | |
939 | : public __and_<__is_array_known_bounds<_Tp>, | |
940 | __is_nt_default_constructible_atom<typename | |
610a7006 | 941 | remove_all_extents<_Tp>::type>> |
505f943d | 942 | { }; |
943 | ||
944 | template<typename _Tp> | |
945 | struct __is_nt_default_constructible_impl<_Tp, false> | |
946 | : public __is_nt_default_constructible_atom<_Tp> | |
947 | { }; | |
948 | ||
949 | /// is_nothrow_default_constructible | |
950 | template<typename _Tp> | |
951 | struct is_nothrow_default_constructible | |
952 | : public __and_<is_default_constructible<_Tp>, | |
610a7006 | 953 | __is_nt_default_constructible_impl<_Tp>> |
505f943d | 954 | { }; |
73d3880c | 955 | |
956 | template<typename _Tp, typename... _Args> | |
505f943d | 957 | struct __is_nt_constructible_impl |
958 | : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> | |
959 | { }; | |
73d3880c | 960 | |
961 | template<typename _Tp, typename _Arg> | |
505f943d | 962 | struct __is_nt_constructible_impl<_Tp, _Arg> |
963 | : public integral_constant<bool, | |
964 | noexcept(static_cast<_Tp>(declval<_Arg>()))> | |
965 | { }; | |
966 | ||
967 | template<typename _Tp> | |
968 | struct __is_nt_constructible_impl<_Tp> | |
969 | : public is_nothrow_default_constructible<_Tp> | |
970 | { }; | |
73d3880c | 971 | |
972 | /// is_nothrow_constructible | |
973 | template<typename _Tp, typename... _Args> | |
974 | struct is_nothrow_constructible | |
505f943d | 975 | : public __and_<is_constructible<_Tp, _Args...>, |
610a7006 | 976 | __is_nt_constructible_impl<_Tp, _Args...>> |
505f943d | 977 | { }; |
978 | ||
2fa630fb | 979 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
505f943d | 980 | struct __is_nothrow_copy_constructible_impl; |
981 | ||
982 | template<typename _Tp> | |
2fa630fb | 983 | struct __is_nothrow_copy_constructible_impl<_Tp, false> |
505f943d | 984 | : public false_type { }; |
985 | ||
986 | template<typename _Tp> | |
2fa630fb | 987 | struct __is_nothrow_copy_constructible_impl<_Tp, true> |
505f943d | 988 | : public is_nothrow_constructible<_Tp, const _Tp&> |
989 | { }; | |
990 | ||
991 | /// is_nothrow_copy_constructible | |
992 | template<typename _Tp> | |
993 | struct is_nothrow_copy_constructible | |
994 | : public __is_nothrow_copy_constructible_impl<_Tp> | |
995 | { }; | |
996 | ||
2fa630fb | 997 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
505f943d | 998 | struct __is_nothrow_move_constructible_impl; |
999 | ||
1000 | template<typename _Tp> | |
2fa630fb | 1001 | struct __is_nothrow_move_constructible_impl<_Tp, false> |
505f943d | 1002 | : public false_type { }; |
1003 | ||
1004 | template<typename _Tp> | |
2fa630fb | 1005 | struct __is_nothrow_move_constructible_impl<_Tp, true> |
505f943d | 1006 | : public is_nothrow_constructible<_Tp, _Tp&&> |
1007 | { }; | |
1008 | ||
1009 | /// is_nothrow_move_constructible | |
1010 | template<typename _Tp> | |
1011 | struct is_nothrow_move_constructible | |
1012 | : public __is_nothrow_move_constructible_impl<_Tp> | |
1013 | { }; | |
1014 | ||
01bbe5aa | 1015 | /// is_assignable |
1016 | template<typename _Tp, typename _Up> | |
1017 | struct is_assignable | |
b4d90ee2 | 1018 | : public __bool_constant<__is_assignable(_Tp, _Up)> |
01bbe5aa | 1019 | { }; |
1020 | ||
2fa630fb | 1021 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
01bbe5aa | 1022 | struct __is_copy_assignable_impl; |
1023 | ||
1024 | template<typename _Tp> | |
2fa630fb | 1025 | struct __is_copy_assignable_impl<_Tp, false> |
01bbe5aa | 1026 | : public false_type { }; |
1027 | ||
1028 | template<typename _Tp> | |
2fa630fb | 1029 | struct __is_copy_assignable_impl<_Tp, true> |
e98125c9 | 1030 | : public is_assignable<_Tp&, const _Tp&> |
01bbe5aa | 1031 | { }; |
1032 | ||
1033 | /// is_copy_assignable | |
1034 | template<typename _Tp> | |
1035 | struct is_copy_assignable | |
1036 | : public __is_copy_assignable_impl<_Tp> | |
1037 | { }; | |
1038 | ||
2fa630fb | 1039 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
01bbe5aa | 1040 | struct __is_move_assignable_impl; |
1041 | ||
1042 | template<typename _Tp> | |
2fa630fb | 1043 | struct __is_move_assignable_impl<_Tp, false> |
01bbe5aa | 1044 | : public false_type { }; |
1045 | ||
1046 | template<typename _Tp> | |
2fa630fb | 1047 | struct __is_move_assignable_impl<_Tp, true> |
01bbe5aa | 1048 | : public is_assignable<_Tp&, _Tp&&> |
1049 | { }; | |
1050 | ||
1051 | /// is_move_assignable | |
1052 | template<typename _Tp> | |
1053 | struct is_move_assignable | |
1054 | : public __is_move_assignable_impl<_Tp> | |
1055 | { }; | |
1056 | ||
1057 | template<typename _Tp, typename _Up> | |
1058 | struct __is_nt_assignable_impl | |
1059 | : public integral_constant<bool, noexcept(declval<_Tp>() = declval<_Up>())> | |
1060 | { }; | |
1061 | ||
1062 | /// is_nothrow_assignable | |
1063 | template<typename _Tp, typename _Up> | |
1064 | struct is_nothrow_assignable | |
1065 | : public __and_<is_assignable<_Tp, _Up>, | |
610a7006 | 1066 | __is_nt_assignable_impl<_Tp, _Up>> |
01bbe5aa | 1067 | { }; |
1068 | ||
2fa630fb | 1069 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
01bbe5aa | 1070 | struct __is_nt_copy_assignable_impl; |
1071 | ||
1072 | template<typename _Tp> | |
2fa630fb | 1073 | struct __is_nt_copy_assignable_impl<_Tp, false> |
01bbe5aa | 1074 | : public false_type { }; |
1075 | ||
1076 | template<typename _Tp> | |
2fa630fb | 1077 | struct __is_nt_copy_assignable_impl<_Tp, true> |
e98125c9 | 1078 | : public is_nothrow_assignable<_Tp&, const _Tp&> |
01bbe5aa | 1079 | { }; |
1080 | ||
1081 | /// is_nothrow_copy_assignable | |
1082 | template<typename _Tp> | |
1083 | struct is_nothrow_copy_assignable | |
1084 | : public __is_nt_copy_assignable_impl<_Tp> | |
1085 | { }; | |
1086 | ||
2fa630fb | 1087 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
01bbe5aa | 1088 | struct __is_nt_move_assignable_impl; |
1089 | ||
1090 | template<typename _Tp> | |
2fa630fb | 1091 | struct __is_nt_move_assignable_impl<_Tp, false> |
01bbe5aa | 1092 | : public false_type { }; |
1093 | ||
1094 | template<typename _Tp> | |
2fa630fb | 1095 | struct __is_nt_move_assignable_impl<_Tp, true> |
01bbe5aa | 1096 | : public is_nothrow_assignable<_Tp&, _Tp&&> |
1097 | { }; | |
1098 | ||
1099 | /// is_nothrow_move_assignable | |
505f943d | 1100 | template<typename _Tp> |
01bbe5aa | 1101 | struct is_nothrow_move_assignable |
1102 | : public __is_nt_move_assignable_impl<_Tp> | |
73d3880c | 1103 | { }; |
1104 | ||
285dc591 | 1105 | /// is_trivially_constructible |
1106 | template<typename _Tp, typename... _Args> | |
1107 | struct is_trivially_constructible | |
1c7a3c47 | 1108 | : public __bool_constant<__is_trivially_constructible(_Tp, _Args...)> |
285dc591 | 1109 | { }; |
fb809cfc | 1110 | |
285dc591 | 1111 | /// is_trivially_default_constructible |
1112 | template<typename _Tp> | |
1113 | struct is_trivially_default_constructible | |
1114 | : public is_trivially_constructible<_Tp>::type | |
1115 | { }; | |
3b222acd | 1116 | |
610a7006 | 1117 | struct __do_is_implicitly_default_constructible_impl |
1118 | { | |
1119 | template <typename _Tp> | |
1120 | static void __helper(const _Tp&); | |
1121 | ||
1122 | template <typename _Tp> | |
1123 | static true_type __test(const _Tp&, | |
1124 | decltype(__helper<const _Tp&>({}))* = 0); | |
1125 | ||
1126 | static false_type __test(...); | |
1127 | }; | |
1128 | ||
1129 | template<typename _Tp> | |
1130 | struct __is_implicitly_default_constructible_impl | |
811f9a1c | 1131 | : public __do_is_implicitly_default_constructible_impl |
1132 | { | |
1133 | typedef decltype(__test(declval<_Tp>())) type; | |
1134 | }; | |
610a7006 | 1135 | |
1136 | template<typename _Tp> | |
1137 | struct __is_implicitly_default_constructible_safe | |
811f9a1c | 1138 | : public __is_implicitly_default_constructible_impl<_Tp>::type |
1139 | { }; | |
610a7006 | 1140 | |
1141 | template <typename _Tp> | |
1142 | struct __is_implicitly_default_constructible | |
811f9a1c | 1143 | : public __and_<is_default_constructible<_Tp>, |
1144 | __is_implicitly_default_constructible_safe<_Tp>> | |
1145 | { }; | |
610a7006 | 1146 | |
285dc591 | 1147 | /// is_trivially_copy_constructible |
b4d90ee2 | 1148 | |
1149 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1150 | struct __is_trivially_copy_constructible_impl; | |
1151 | ||
285dc591 | 1152 | template<typename _Tp> |
b4d90ee2 | 1153 | struct __is_trivially_copy_constructible_impl<_Tp, false> |
1154 | : public false_type { }; | |
1155 | ||
1156 | template<typename _Tp> | |
1157 | struct __is_trivially_copy_constructible_impl<_Tp, true> | |
fb809cfc | 1158 | : public __and_<is_copy_constructible<_Tp>, |
285dc591 | 1159 | integral_constant<bool, |
610a7006 | 1160 | __is_trivially_constructible(_Tp, const _Tp&)>> |
285dc591 | 1161 | { }; |
fb809cfc | 1162 | |
b4d90ee2 | 1163 | template<typename _Tp> |
1164 | struct is_trivially_copy_constructible | |
1165 | : public __is_trivially_copy_constructible_impl<_Tp> | |
1166 | { }; | |
1167 | ||
285dc591 | 1168 | /// is_trivially_move_constructible |
b4d90ee2 | 1169 | |
1170 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1171 | struct __is_trivially_move_constructible_impl; | |
1172 | ||
285dc591 | 1173 | template<typename _Tp> |
b4d90ee2 | 1174 | struct __is_trivially_move_constructible_impl<_Tp, false> |
1175 | : public false_type { }; | |
1176 | ||
1177 | template<typename _Tp> | |
1178 | struct __is_trivially_move_constructible_impl<_Tp, true> | |
fb809cfc | 1179 | : public __and_<is_move_constructible<_Tp>, |
285dc591 | 1180 | integral_constant<bool, |
610a7006 | 1181 | __is_trivially_constructible(_Tp, _Tp&&)>> |
285dc591 | 1182 | { }; |
3b222acd | 1183 | |
b4d90ee2 | 1184 | template<typename _Tp> |
1185 | struct is_trivially_move_constructible | |
1186 | : public __is_trivially_move_constructible_impl<_Tp> | |
1187 | { }; | |
1188 | ||
285dc591 | 1189 | /// is_trivially_assignable |
1190 | template<typename _Tp, typename _Up> | |
1191 | struct is_trivially_assignable | |
b4d90ee2 | 1192 | : public __bool_constant<__is_trivially_assignable(_Tp, _Up)> |
285dc591 | 1193 | { }; |
3b222acd | 1194 | |
285dc591 | 1195 | /// is_trivially_copy_assignable |
b4d90ee2 | 1196 | |
1197 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1198 | struct __is_trivially_copy_assignable_impl; | |
1199 | ||
285dc591 | 1200 | template<typename _Tp> |
b4d90ee2 | 1201 | struct __is_trivially_copy_assignable_impl<_Tp, false> |
1202 | : public false_type { }; | |
1203 | ||
1204 | template<typename _Tp> | |
1205 | struct __is_trivially_copy_assignable_impl<_Tp, true> | |
1c7a3c47 | 1206 | : public __bool_constant<__is_trivially_assignable(_Tp&, const _Tp&)> |
285dc591 | 1207 | { }; |
3b222acd | 1208 | |
b4d90ee2 | 1209 | template<typename _Tp> |
1210 | struct is_trivially_copy_assignable | |
1211 | : public __is_trivially_copy_assignable_impl<_Tp> | |
1212 | { }; | |
1213 | ||
285dc591 | 1214 | /// is_trivially_move_assignable |
b4d90ee2 | 1215 | |
1216 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> | |
1217 | struct __is_trivially_move_assignable_impl; | |
1218 | ||
285dc591 | 1219 | template<typename _Tp> |
b4d90ee2 | 1220 | struct __is_trivially_move_assignable_impl<_Tp, false> |
1221 | : public false_type { }; | |
1222 | ||
1223 | template<typename _Tp> | |
1224 | struct __is_trivially_move_assignable_impl<_Tp, true> | |
1c7a3c47 | 1225 | : public __bool_constant<__is_trivially_assignable(_Tp&, _Tp&&)> |
285dc591 | 1226 | { }; |
3b222acd | 1227 | |
b4d90ee2 | 1228 | template<typename _Tp> |
1229 | struct is_trivially_move_assignable | |
1230 | : public __is_trivially_move_assignable_impl<_Tp> | |
1231 | { }; | |
1232 | ||
3b222acd | 1233 | /// is_trivially_destructible |
1234 | template<typename _Tp> | |
1235 | struct is_trivially_destructible | |
1c7a3c47 | 1236 | : public __and_<is_destructible<_Tp>, |
1237 | __bool_constant<__has_trivial_destructor(_Tp)>> | |
3b222acd | 1238 | { }; |
1239 | ||
c17b0a1c | 1240 | |
29928af2 | 1241 | /// has_virtual_destructor |
1242 | template<typename _Tp> | |
1243 | struct has_virtual_destructor | |
1244 | : public integral_constant<bool, __has_virtual_destructor(_Tp)> | |
1245 | { }; | |
1246 | ||
fb809cfc | 1247 | |
29928af2 | 1248 | // type property queries. |
1249 | ||
1250 | /// alignment_of | |
1251 | template<typename _Tp> | |
1252 | struct alignment_of | |
c1ddd991 | 1253 | : public integral_constant<std::size_t, alignof(_Tp)> { }; |
fb809cfc | 1254 | |
29928af2 | 1255 | /// rank |
1256 | template<typename> | |
1257 | struct rank | |
1258 | : public integral_constant<std::size_t, 0> { }; | |
fb809cfc | 1259 | |
29928af2 | 1260 | template<typename _Tp, std::size_t _Size> |
1261 | struct rank<_Tp[_Size]> | |
1262 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1263 | ||
1264 | template<typename _Tp> | |
1265 | struct rank<_Tp[]> | |
1266 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; | |
1267 | ||
1268 | /// extent | |
1269 | template<typename, unsigned _Uint> | |
1270 | struct extent | |
1271 | : public integral_constant<std::size_t, 0> { }; | |
fb809cfc | 1272 | |
29928af2 | 1273 | template<typename _Tp, unsigned _Uint, std::size_t _Size> |
1274 | struct extent<_Tp[_Size], _Uint> | |
1275 | : public integral_constant<std::size_t, | |
1276 | _Uint == 0 ? _Size : extent<_Tp, | |
1277 | _Uint - 1>::value> | |
1278 | { }; | |
1279 | ||
1280 | template<typename _Tp, unsigned _Uint> | |
1281 | struct extent<_Tp[], _Uint> | |
1282 | : public integral_constant<std::size_t, | |
1283 | _Uint == 0 ? 0 : extent<_Tp, | |
1284 | _Uint - 1>::value> | |
1285 | { }; | |
1286 | ||
1287 | ||
8b3d154c | 1288 | // Type relations. |
29928af2 | 1289 | |
1290 | /// is_same | |
1291 | template<typename, typename> | |
1292 | struct is_same | |
1293 | : public false_type { }; | |
1294 | ||
1295 | template<typename _Tp> | |
1296 | struct is_same<_Tp, _Tp> | |
1297 | : public true_type { }; | |
17a39b32 | 1298 | |
4a77b438 | 1299 | /// is_base_of |
c17b0a1c | 1300 | template<typename _Base, typename _Derived> |
1301 | struct is_base_of | |
1302 | : public integral_constant<bool, __is_base_of(_Base, _Derived)> | |
1303 | { }; | |
1304 | ||
c6d4a105 | 1305 | template<typename _From, typename _To, |
29928af2 | 1306 | bool = __or_<is_void<_From>, is_function<_To>, |
1307 | is_array<_To>>::value> | |
c6d4a105 | 1308 | struct __is_convertible_helper |
ba2dee86 | 1309 | { |
1310 | typedef typename is_void<_To>::type type; | |
ba2dee86 | 1311 | }; |
c6d4a105 | 1312 | |
c17b0a1c | 1313 | template<typename _From, typename _To> |
17a39b32 | 1314 | class __is_convertible_helper<_From, _To, false> |
c17b0a1c | 1315 | { |
ba2dee86 | 1316 | template<typename _To1> |
1317 | static void __test_aux(_To1) noexcept; | |
25ce39d4 | 1318 | |
c6e805a7 | 1319 | template<typename _From1, typename _To1, |
1320 | typename = decltype(__test_aux<_To1>(std::declval<_From1>()))> | |
1321 | static true_type | |
25ce39d4 | 1322 | __test(int); |
1323 | ||
1324 | template<typename, typename> | |
c6e805a7 | 1325 | static false_type |
1326 | __test(...); | |
c6d4a105 | 1327 | |
c17b0a1c | 1328 | public: |
c6e805a7 | 1329 | typedef decltype(__test<_From, _To>(0)) type; |
c17b0a1c | 1330 | }; |
1331 | ||
c6e805a7 | 1332 | |
17a39b32 | 1333 | /// is_convertible |
c17b0a1c | 1334 | template<typename _From, typename _To> |
1335 | struct is_convertible | |
c6e805a7 | 1336 | : public __is_convertible_helper<_From, _To>::type |
c17b0a1c | 1337 | { }; |
1338 | ||
b640dd11 | 1339 | template<typename _From, typename _To, |
1340 | bool = __or_<is_void<_From>, is_function<_To>, | |
1341 | is_array<_To>>::value> | |
1342 | struct __is_nt_convertible_helper | |
1343 | : is_void<_To> | |
1344 | { }; | |
1345 | ||
1346 | template<typename _From, typename _To> | |
1347 | class __is_nt_convertible_helper<_From, _To, false> | |
1348 | { | |
1349 | template<typename _To1> | |
1350 | static void __test_aux(_To1) noexcept; | |
1351 | ||
1352 | template<typename _From1, typename _To1> | |
2cfc6a76 | 1353 | static |
1354 | __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))> | |
b640dd11 | 1355 | __test(int); |
1356 | ||
1357 | template<typename, typename> | |
1358 | static false_type | |
1359 | __test(...); | |
1360 | ||
1361 | public: | |
1362 | using type = decltype(__test<_From, _To>(0)); | |
1363 | }; | |
1364 | ||
2cfc6a76 | 1365 | // is_nothrow_convertible for C++11 |
1366 | template<typename _From, typename _To> | |
1367 | struct __is_nothrow_convertible | |
1368 | : public __is_nt_convertible_helper<_From, _To>::type | |
1369 | { }; | |
1370 | ||
1371 | #if __cplusplus > 201703L | |
ba2dee86 | 1372 | /// is_nothrow_convertible |
1373 | template<typename _From, typename _To> | |
1374 | struct is_nothrow_convertible | |
b640dd11 | 1375 | : public __is_nt_convertible_helper<_From, _To>::type |
ba2dee86 | 1376 | { }; |
1377 | ||
1378 | /// is_nothrow_convertible_v | |
1379 | template<typename _From, typename _To> | |
1380 | inline constexpr bool is_nothrow_convertible_v | |
1381 | = is_nothrow_convertible<_From, _To>::value; | |
1382 | #endif // C++2a | |
86c291de | 1383 | |
8b3d154c | 1384 | // Const-volatile modifications. |
6b75e122 | 1385 | |
29928af2 | 1386 | /// remove_const |
6b75e122 | 1387 | template<typename _Tp> |
29928af2 | 1388 | struct remove_const |
1389 | { typedef _Tp type; }; | |
6b75e122 | 1390 | |
29928af2 | 1391 | template<typename _Tp> |
1392 | struct remove_const<_Tp const> | |
1393 | { typedef _Tp type; }; | |
fb809cfc | 1394 | |
29928af2 | 1395 | /// remove_volatile |
1396 | template<typename _Tp> | |
1397 | struct remove_volatile | |
1398 | { typedef _Tp type; }; | |
6b75e122 | 1399 | |
29928af2 | 1400 | template<typename _Tp> |
1401 | struct remove_volatile<_Tp volatile> | |
1402 | { typedef _Tp type; }; | |
fb809cfc | 1403 | |
29928af2 | 1404 | /// remove_cv |
1405 | template<typename _Tp> | |
1406 | struct remove_cv | |
1407 | { | |
1408 | typedef typename | |
1409 | remove_const<typename remove_volatile<_Tp>::type>::type type; | |
1410 | }; | |
fb809cfc | 1411 | |
29928af2 | 1412 | /// add_const |
1413 | template<typename _Tp> | |
1414 | struct add_const | |
1415 | { typedef _Tp const type; }; | |
fb809cfc | 1416 | |
29928af2 | 1417 | /// add_volatile |
1418 | template<typename _Tp> | |
1419 | struct add_volatile | |
1420 | { typedef _Tp volatile type; }; | |
fb809cfc | 1421 | |
29928af2 | 1422 | /// add_cv |
1423 | template<typename _Tp> | |
1424 | struct add_cv | |
1425 | { | |
1426 | typedef typename | |
1427 | add_const<typename add_volatile<_Tp>::type>::type type; | |
1428 | }; | |
6b75e122 | 1429 | |
2cff5b9a | 1430 | #if __cplusplus > 201103L |
f6751ff2 | 1431 | |
1432 | #define __cpp_lib_transformation_trait_aliases 201304 | |
1433 | ||
2cff5b9a | 1434 | /// Alias template for remove_const |
1435 | template<typename _Tp> | |
1436 | using remove_const_t = typename remove_const<_Tp>::type; | |
1437 | ||
1438 | /// Alias template for remove_volatile | |
1439 | template<typename _Tp> | |
1440 | using remove_volatile_t = typename remove_volatile<_Tp>::type; | |
1441 | ||
1442 | /// Alias template for remove_cv | |
1443 | template<typename _Tp> | |
1444 | using remove_cv_t = typename remove_cv<_Tp>::type; | |
1445 | ||
1446 | /// Alias template for add_const | |
1447 | template<typename _Tp> | |
1448 | using add_const_t = typename add_const<_Tp>::type; | |
1449 | ||
1450 | /// Alias template for add_volatile | |
1451 | template<typename _Tp> | |
1452 | using add_volatile_t = typename add_volatile<_Tp>::type; | |
1453 | ||
1454 | /// Alias template for add_cv | |
1455 | template<typename _Tp> | |
1456 | using add_cv_t = typename add_cv<_Tp>::type; | |
1457 | #endif | |
6b75e122 | 1458 | |
29928af2 | 1459 | // Reference transformations. |
6b75e122 | 1460 | |
29928af2 | 1461 | /// remove_reference |
1462 | template<typename _Tp> | |
1463 | struct remove_reference | |
1464 | { typedef _Tp type; }; | |
6b75e122 | 1465 | |
29928af2 | 1466 | template<typename _Tp> |
1467 | struct remove_reference<_Tp&> | |
1468 | { typedef _Tp type; }; | |
6b75e122 | 1469 | |
29928af2 | 1470 | template<typename _Tp> |
1471 | struct remove_reference<_Tp&&> | |
1472 | { typedef _Tp type; }; | |
1473 | ||
2fa630fb | 1474 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
29928af2 | 1475 | struct __add_lvalue_reference_helper |
1476 | { typedef _Tp type; }; | |
6b75e122 | 1477 | |
a304e6ce | 1478 | template<typename _Tp> |
2fa630fb | 1479 | struct __add_lvalue_reference_helper<_Tp, true> |
29928af2 | 1480 | { typedef _Tp& type; }; |
a304e6ce | 1481 | |
29928af2 | 1482 | /// add_lvalue_reference |
a304e6ce | 1483 | template<typename _Tp> |
29928af2 | 1484 | struct add_lvalue_reference |
1485 | : public __add_lvalue_reference_helper<_Tp> | |
1486 | { }; | |
1487 | ||
2fa630fb | 1488 | template<typename _Tp, bool = __is_referenceable<_Tp>::value> |
29928af2 | 1489 | struct __add_rvalue_reference_helper |
1490 | { typedef _Tp type; }; | |
a304e6ce | 1491 | |
1492 | template<typename _Tp> | |
29928af2 | 1493 | struct __add_rvalue_reference_helper<_Tp, true> |
1494 | { typedef _Tp&& type; }; | |
a304e6ce | 1495 | |
29928af2 | 1496 | /// add_rvalue_reference |
a304e6ce | 1497 | template<typename _Tp> |
29928af2 | 1498 | struct add_rvalue_reference |
1499 | : public __add_rvalue_reference_helper<_Tp> | |
1500 | { }; | |
a304e6ce | 1501 | |
2cff5b9a | 1502 | #if __cplusplus > 201103L |
1503 | /// Alias template for remove_reference | |
1504 | template<typename _Tp> | |
1505 | using remove_reference_t = typename remove_reference<_Tp>::type; | |
1506 | ||
1507 | /// Alias template for add_lvalue_reference | |
1508 | template<typename _Tp> | |
1509 | using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; | |
1510 | ||
1511 | /// Alias template for add_rvalue_reference | |
1512 | template<typename _Tp> | |
1513 | using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; | |
1514 | #endif | |
6b75e122 | 1515 | |
8b3d154c | 1516 | // Sign modifications. |
29928af2 | 1517 | |
6b75e122 | 1518 | // Utility for constructing identically cv-qualified types. |
1519 | template<typename _Unqualified, bool _IsConst, bool _IsVol> | |
1520 | struct __cv_selector; | |
1521 | ||
1522 | template<typename _Unqualified> | |
1523 | struct __cv_selector<_Unqualified, false, false> | |
1524 | { typedef _Unqualified __type; }; | |
1525 | ||
1526 | template<typename _Unqualified> | |
1527 | struct __cv_selector<_Unqualified, false, true> | |
1528 | { typedef volatile _Unqualified __type; }; | |
1529 | ||
1530 | template<typename _Unqualified> | |
1531 | struct __cv_selector<_Unqualified, true, false> | |
1532 | { typedef const _Unqualified __type; }; | |
1533 | ||
1534 | template<typename _Unqualified> | |
1535 | struct __cv_selector<_Unqualified, true, true> | |
1536 | { typedef const volatile _Unqualified __type; }; | |
1537 | ||
1538 | template<typename _Qualified, typename _Unqualified, | |
1539 | bool _IsConst = is_const<_Qualified>::value, | |
1540 | bool _IsVol = is_volatile<_Qualified>::value> | |
17a39b32 | 1541 | class __match_cv_qualifiers |
6b75e122 | 1542 | { |
6b75e122 | 1543 | typedef __cv_selector<_Unqualified, _IsConst, _IsVol> __match; |
1544 | ||
1545 | public: | |
fb809cfc | 1546 | typedef typename __match::__type __type; |
6b75e122 | 1547 | }; |
1548 | ||
6b75e122 | 1549 | // Utility for finding the unsigned versions of signed integral types. |
1550 | template<typename _Tp> | |
c17b0a1c | 1551 | struct __make_unsigned |
1552 | { typedef _Tp __type; }; | |
6b75e122 | 1553 | |
1554 | template<> | |
1555 | struct __make_unsigned<char> | |
1556 | { typedef unsigned char __type; }; | |
1557 | ||
1558 | template<> | |
1559 | struct __make_unsigned<signed char> | |
1560 | { typedef unsigned char __type; }; | |
1561 | ||
6b75e122 | 1562 | template<> |
1563 | struct __make_unsigned<short> | |
1564 | { typedef unsigned short __type; }; | |
1565 | ||
1566 | template<> | |
1567 | struct __make_unsigned<int> | |
1568 | { typedef unsigned int __type; }; | |
1569 | ||
1570 | template<> | |
1571 | struct __make_unsigned<long> | |
1572 | { typedef unsigned long __type; }; | |
1573 | ||
1574 | template<> | |
1575 | struct __make_unsigned<long long> | |
1576 | { typedef unsigned long long __type; }; | |
1577 | ||
9f75f026 | 1578 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1579 | template<> | |
1580 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0> | |
1581 | { typedef unsigned __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1582 | #endif | |
1583 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1584 | template<> | |
1585 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1> | |
1586 | { typedef unsigned __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1587 | #endif | |
1588 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
a3ee70c2 | 1589 | template<> |
9f75f026 | 1590 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2> |
1591 | { typedef unsigned __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1592 | #endif | |
1593 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
1594 | template<> | |
1595 | struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3> | |
1596 | { typedef unsigned __GLIBCXX_TYPE_INT_N_3 __type; }; | |
a3ee70c2 | 1597 | #endif |
1598 | ||
6b75e122 | 1599 | // Select between integral and enum: not possible to be both. |
fb809cfc | 1600 | template<typename _Tp, |
6b75e122 | 1601 | bool _IsInt = is_integral<_Tp>::value, |
6b75e122 | 1602 | bool _IsEnum = is_enum<_Tp>::value> |
17a39b32 | 1603 | class __make_unsigned_selector; |
1604 | ||
6b75e122 | 1605 | template<typename _Tp> |
17a39b32 | 1606 | class __make_unsigned_selector<_Tp, true, false> |
6b75e122 | 1607 | { |
4767eb54 | 1608 | using __unsigned_type |
1609 | = typename __make_unsigned<typename remove_cv<_Tp>::type>::__type; | |
6b75e122 | 1610 | |
1611 | public: | |
4767eb54 | 1612 | using __type |
1613 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
6b75e122 | 1614 | }; |
1615 | ||
4767eb54 | 1616 | class __make_unsigned_selector_base |
1617 | { | |
1618 | protected: | |
1619 | template<typename...> struct _List { }; | |
1620 | ||
1621 | template<typename _Tp, typename... _Up> | |
1622 | struct _List<_Tp, _Up...> : _List<_Up...> | |
1623 | { static constexpr size_t __size = sizeof(_Tp); }; | |
1624 | ||
1625 | template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)> | |
1626 | struct __select; | |
1627 | ||
1628 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1629 | struct __select<_Sz, _List<_Uint, _UInts...>, true> | |
1630 | { using __type = _Uint; }; | |
1631 | ||
1632 | template<size_t _Sz, typename _Uint, typename... _UInts> | |
1633 | struct __select<_Sz, _List<_Uint, _UInts...>, false> | |
1634 | : __select<_Sz, _List<_UInts...>> | |
1635 | { }; | |
1636 | }; | |
1637 | ||
1638 | // Choose unsigned integer type with the smallest rank and same size as _Tp | |
6b75e122 | 1639 | template<typename _Tp> |
17a39b32 | 1640 | class __make_unsigned_selector<_Tp, false, true> |
4767eb54 | 1641 | : __make_unsigned_selector_base |
6b75e122 | 1642 | { |
42c6f5c5 | 1643 | // With -fshort-enums, an enum may be as small as a char. |
4767eb54 | 1644 | using _UInts = _List<unsigned char, unsigned short, unsigned int, |
1645 | unsigned long, unsigned long long>; | |
1646 | ||
1647 | using __unsigned_type = typename __select<sizeof(_Tp), _UInts>::__type; | |
8ca1fae5 | 1648 | |
6b75e122 | 1649 | public: |
4767eb54 | 1650 | using __type |
1651 | = typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type; | |
1652 | }; | |
1653 | ||
25694c85 | 1654 | // wchar_t, char8_t, char16_t and char32_t are integral types but are |
1655 | // neither signed integer types nor unsigned integer types, so must be | |
4767eb54 | 1656 | // transformed to the unsigned integer type with the smallest rank. |
1657 | // Use the partial specialization for enumeration types to do that. | |
1658 | #if defined(_GLIBCXX_USE_WCHAR_T) | |
1659 | template<> | |
1660 | struct __make_unsigned<wchar_t> | |
1661 | { | |
1662 | using __type | |
1663 | = typename __make_unsigned_selector<wchar_t, false, true>::__type; | |
1664 | }; | |
1665 | #endif | |
1666 | ||
25694c85 | 1667 | #ifdef _GLIBCXX_USE_CHAR8_T |
1668 | template<> | |
1669 | struct __make_unsigned<char8_t> | |
1670 | { | |
1671 | using __type | |
1672 | = typename __make_unsigned_selector<char8_t, false, true>::__type; | |
1673 | }; | |
1674 | #endif | |
1675 | ||
4767eb54 | 1676 | template<> |
1677 | struct __make_unsigned<char16_t> | |
1678 | { | |
1679 | using __type | |
1680 | = typename __make_unsigned_selector<char16_t, false, true>::__type; | |
1681 | }; | |
1682 | ||
1683 | template<> | |
1684 | struct __make_unsigned<char32_t> | |
1685 | { | |
1686 | using __type | |
1687 | = typename __make_unsigned_selector<char32_t, false, true>::__type; | |
6b75e122 | 1688 | }; |
1689 | ||
6b75e122 | 1690 | // Given an integral/enum type, return the corresponding unsigned |
1691 | // integer type. | |
97a32de0 | 1692 | // Primary template. |
1693 | /// make_unsigned | |
6b75e122 | 1694 | template<typename _Tp> |
fb809cfc | 1695 | struct make_unsigned |
6b75e122 | 1696 | { typedef typename __make_unsigned_selector<_Tp>::__type type; }; |
1697 | ||
1698 | // Integral, but don't define. | |
1699 | template<> | |
1700 | struct make_unsigned<bool>; | |
1701 | ||
1702 | ||
1703 | // Utility for finding the signed versions of unsigned integral types. | |
1704 | template<typename _Tp> | |
c17b0a1c | 1705 | struct __make_signed |
1706 | { typedef _Tp __type; }; | |
6b75e122 | 1707 | |
1708 | template<> | |
1709 | struct __make_signed<char> | |
1710 | { typedef signed char __type; }; | |
1711 | ||
1712 | template<> | |
1713 | struct __make_signed<unsigned char> | |
1714 | { typedef signed char __type; }; | |
1715 | ||
6b75e122 | 1716 | template<> |
1717 | struct __make_signed<unsigned short> | |
1718 | { typedef signed short __type; }; | |
1719 | ||
1720 | template<> | |
1721 | struct __make_signed<unsigned int> | |
1722 | { typedef signed int __type; }; | |
1723 | ||
1724 | template<> | |
1725 | struct __make_signed<unsigned long> | |
1726 | { typedef signed long __type; }; | |
1727 | ||
1728 | template<> | |
1729 | struct __make_signed<unsigned long long> | |
1730 | { typedef signed long long __type; }; | |
1731 | ||
9f75f026 | 1732 | #if defined(__GLIBCXX_TYPE_INT_N_0) |
1733 | template<> | |
1734 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0> | |
1735 | { typedef __GLIBCXX_TYPE_INT_N_0 __type; }; | |
1736 | #endif | |
1737 | #if defined(__GLIBCXX_TYPE_INT_N_1) | |
1738 | template<> | |
1739 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1> | |
1740 | { typedef __GLIBCXX_TYPE_INT_N_1 __type; }; | |
1741 | #endif | |
1742 | #if defined(__GLIBCXX_TYPE_INT_N_2) | |
1743 | template<> | |
1744 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2> | |
1745 | { typedef __GLIBCXX_TYPE_INT_N_2 __type; }; | |
1746 | #endif | |
1747 | #if defined(__GLIBCXX_TYPE_INT_N_3) | |
a3ee70c2 | 1748 | template<> |
9f75f026 | 1749 | struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3> |
1750 | { typedef __GLIBCXX_TYPE_INT_N_3 __type; }; | |
a3ee70c2 | 1751 | #endif |
1752 | ||
b10ec188 | 1753 | // Select between integral and enum: not possible to be both. |
fb809cfc | 1754 | template<typename _Tp, |
6b75e122 | 1755 | bool _IsInt = is_integral<_Tp>::value, |
6b75e122 | 1756 | bool _IsEnum = is_enum<_Tp>::value> |
17a39b32 | 1757 | class __make_signed_selector; |
1758 | ||
6b75e122 | 1759 | template<typename _Tp> |
17a39b32 | 1760 | class __make_signed_selector<_Tp, true, false> |
6b75e122 | 1761 | { |
4767eb54 | 1762 | using __signed_type |
1763 | = typename __make_signed<typename remove_cv<_Tp>::type>::__type; | |
6b75e122 | 1764 | |
1765 | public: | |
4767eb54 | 1766 | using __type |
1767 | = typename __match_cv_qualifiers<_Tp, __signed_type>::__type; | |
6b75e122 | 1768 | }; |
1769 | ||
4767eb54 | 1770 | // Choose signed integer type with the smallest rank and same size as _Tp |
6b75e122 | 1771 | template<typename _Tp> |
17a39b32 | 1772 | class __make_signed_selector<_Tp, false, true> |
6b75e122 | 1773 | { |
8ca1fae5 | 1774 | typedef typename __make_unsigned_selector<_Tp>::__type __unsigned_type; |
6b75e122 | 1775 | |
1776 | public: | |
8ca1fae5 | 1777 | typedef typename __make_signed_selector<__unsigned_type>::__type __type; |
6b75e122 | 1778 | }; |
1779 | ||
4767eb54 | 1780 | // wchar_t, char16_t and char32_t are integral types but are neither |
e2569f6f | 1781 | // signed integer types nor unsigned integer types, so must be |
4767eb54 | 1782 | // transformed to the signed integer type with the smallest rank. |
1783 | // Use the partial specialization for enumeration types to do that. | |
1784 | #if defined(_GLIBCXX_USE_WCHAR_T) | |
1785 | template<> | |
1786 | struct __make_signed<wchar_t> | |
1787 | { | |
1788 | using __type | |
1789 | = typename __make_signed_selector<wchar_t, false, true>::__type; | |
1790 | }; | |
1791 | #endif | |
1792 | ||
25694c85 | 1793 | #if defined(_GLIBCXX_USE_CHAR8_T) |
1794 | template<> | |
1795 | struct __make_signed<char8_t> | |
1796 | { | |
1797 | using __type | |
1798 | = typename __make_signed_selector<char8_t, false, true>::__type; | |
1799 | }; | |
1800 | #endif | |
1801 | ||
4767eb54 | 1802 | template<> |
1803 | struct __make_signed<char16_t> | |
1804 | { | |
1805 | using __type | |
1806 | = typename __make_signed_selector<char16_t, false, true>::__type; | |
1807 | }; | |
1808 | ||
1809 | template<> | |
1810 | struct __make_signed<char32_t> | |
1811 | { | |
1812 | using __type | |
1813 | = typename __make_signed_selector<char32_t, false, true>::__type; | |
1814 | }; | |
1815 | ||
6b75e122 | 1816 | // Given an integral/enum type, return the corresponding signed |
1817 | // integer type. | |
97a32de0 | 1818 | // Primary template. |
1819 | /// make_signed | |
6b75e122 | 1820 | template<typename _Tp> |
fb809cfc | 1821 | struct make_signed |
6b75e122 | 1822 | { typedef typename __make_signed_selector<_Tp>::__type type; }; |
1823 | ||
1824 | // Integral, but don't define. | |
1825 | template<> | |
1826 | struct make_signed<bool>; | |
393a4e4b | 1827 | |
2cff5b9a | 1828 | #if __cplusplus > 201103L |
1829 | /// Alias template for make_signed | |
1830 | template<typename _Tp> | |
1831 | using make_signed_t = typename make_signed<_Tp>::type; | |
1832 | ||
1833 | /// Alias template for make_unsigned | |
1834 | template<typename _Tp> | |
1835 | using make_unsigned_t = typename make_unsigned<_Tp>::type; | |
1836 | #endif | |
29928af2 | 1837 | |
8b3d154c | 1838 | // Array modifications. |
29928af2 | 1839 | |
1840 | /// remove_extent | |
1841 | template<typename _Tp> | |
1842 | struct remove_extent | |
1843 | { typedef _Tp type; }; | |
1844 | ||
1845 | template<typename _Tp, std::size_t _Size> | |
1846 | struct remove_extent<_Tp[_Size]> | |
1847 | { typedef _Tp type; }; | |
1848 | ||
1849 | template<typename _Tp> | |
1850 | struct remove_extent<_Tp[]> | |
1851 | { typedef _Tp type; }; | |
1852 | ||
1853 | /// remove_all_extents | |
1854 | template<typename _Tp> | |
1855 | struct remove_all_extents | |
1856 | { typedef _Tp type; }; | |
1857 | ||
1858 | template<typename _Tp, std::size_t _Size> | |
1859 | struct remove_all_extents<_Tp[_Size]> | |
1860 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1861 | ||
1862 | template<typename _Tp> | |
1863 | struct remove_all_extents<_Tp[]> | |
1864 | { typedef typename remove_all_extents<_Tp>::type type; }; | |
1865 | ||
2cff5b9a | 1866 | #if __cplusplus > 201103L |
1867 | /// Alias template for remove_extent | |
1868 | template<typename _Tp> | |
1869 | using remove_extent_t = typename remove_extent<_Tp>::type; | |
1870 | ||
1871 | /// Alias template for remove_all_extents | |
1872 | template<typename _Tp> | |
1873 | using remove_all_extents_t = typename remove_all_extents<_Tp>::type; | |
1874 | #endif | |
29928af2 | 1875 | |
8b3d154c | 1876 | // Pointer modifications. |
29928af2 | 1877 | |
1878 | template<typename _Tp, typename> | |
1879 | struct __remove_pointer_helper | |
1880 | { typedef _Tp type; }; | |
1881 | ||
1882 | template<typename _Tp, typename _Up> | |
1883 | struct __remove_pointer_helper<_Tp, _Up*> | |
1884 | { typedef _Up type; }; | |
1885 | ||
1886 | /// remove_pointer | |
1887 | template<typename _Tp> | |
1888 | struct remove_pointer | |
1889 | : public __remove_pointer_helper<_Tp, typename remove_cv<_Tp>::type> | |
1890 | { }; | |
1891 | ||
1892 | /// add_pointer | |
2fa630fb | 1893 | template<typename _Tp, bool = __or_<__is_referenceable<_Tp>, |
1894 | is_void<_Tp>>::value> | |
1895 | struct __add_pointer_helper | |
1896 | { typedef _Tp type; }; | |
1897 | ||
29928af2 | 1898 | template<typename _Tp> |
2fa630fb | 1899 | struct __add_pointer_helper<_Tp, true> |
29928af2 | 1900 | { typedef typename remove_reference<_Tp>::type* type; }; |
1901 | ||
2fa630fb | 1902 | template<typename _Tp> |
fb809cfc | 1903 | struct add_pointer |
2fa630fb | 1904 | : public __add_pointer_helper<_Tp> |
1905 | { }; | |
1906 | ||
2cff5b9a | 1907 | #if __cplusplus > 201103L |
1908 | /// Alias template for remove_pointer | |
1909 | template<typename _Tp> | |
1910 | using remove_pointer_t = typename remove_pointer<_Tp>::type; | |
1911 | ||
1912 | /// Alias template for add_pointer | |
1913 | template<typename _Tp> | |
1914 | using add_pointer_t = typename add_pointer<_Tp>::type; | |
1915 | #endif | |
29928af2 | 1916 | |
1917 | template<std::size_t _Len> | |
1918 | struct __aligned_storage_msa | |
fb809cfc | 1919 | { |
29928af2 | 1920 | union __type |
1921 | { | |
1922 | unsigned char __data[_Len]; | |
fb809cfc | 1923 | struct __attribute__((__aligned__)) { } __align; |
29928af2 | 1924 | }; |
1925 | }; | |
1926 | ||
1927 | /** | |
1928 | * @brief Alignment type. | |
1929 | * | |
1930 | * The value of _Align is a default-alignment which shall be the | |
1931 | * most stringent alignment requirement for any C++ object type | |
1932 | * whose size is no greater than _Len (3.9). The member typedef | |
1933 | * type shall be a POD type suitable for use as uninitialized | |
1934 | * storage for any object whose size is at most _Len and whose | |
1935 | * alignment is a divisor of _Align. | |
1936 | */ | |
1937 | template<std::size_t _Len, std::size_t _Align = | |
1938 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
1939 | struct aligned_storage | |
fb809cfc | 1940 | { |
29928af2 | 1941 | union type |
1942 | { | |
1943 | unsigned char __data[_Len]; | |
fb809cfc | 1944 | struct __attribute__((__aligned__((_Align)))) { } __align; |
29928af2 | 1945 | }; |
1946 | }; | |
1947 | ||
270bb80f | 1948 | template <typename... _Types> |
1949 | struct __strictest_alignment | |
1950 | { | |
1951 | static const size_t _S_alignment = 0; | |
1952 | static const size_t _S_size = 0; | |
1953 | }; | |
1954 | ||
1955 | template <typename _Tp, typename... _Types> | |
1956 | struct __strictest_alignment<_Tp, _Types...> | |
1957 | { | |
1958 | static const size_t _S_alignment = | |
1959 | alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment | |
1960 | ? alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment; | |
1961 | static const size_t _S_size = | |
1962 | sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size | |
1963 | ? sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size; | |
1964 | }; | |
1965 | ||
1966 | /** | |
1967 | * @brief Provide aligned storage for types. | |
1968 | * | |
1969 | * [meta.trans.other] | |
1970 | * | |
1971 | * Provides aligned storage for any of the provided types of at | |
1972 | * least size _Len. | |
1973 | * | |
1974 | * @see aligned_storage | |
1975 | */ | |
1976 | template <size_t _Len, typename... _Types> | |
1977 | struct aligned_union | |
1978 | { | |
1979 | private: | |
1980 | static_assert(sizeof...(_Types) != 0, "At least one type is required"); | |
1981 | ||
1982 | using __strictest = __strictest_alignment<_Types...>; | |
1983 | static const size_t _S_len = _Len > __strictest::_S_size | |
1984 | ? _Len : __strictest::_S_size; | |
1985 | public: | |
1986 | /// The value of the strictest alignment of _Types. | |
1987 | static const size_t alignment_value = __strictest::_S_alignment; | |
1988 | /// The storage. | |
1989 | typedef typename aligned_storage<_S_len, alignment_value>::type type; | |
1990 | }; | |
1991 | ||
1992 | template <size_t _Len, typename... _Types> | |
1993 | const size_t aligned_union<_Len, _Types...>::alignment_value; | |
29928af2 | 1994 | |
1995 | // Decay trait for arrays and functions, used for perfect forwarding | |
1996 | // in make_pair, make_tuple, etc. | |
fb809cfc | 1997 | template<typename _Up, |
29928af2 | 1998 | bool _IsArray = is_array<_Up>::value, |
fb809cfc | 1999 | bool _IsFunction = is_function<_Up>::value> |
29928af2 | 2000 | struct __decay_selector; |
2001 | ||
2002 | // NB: DR 705. | |
fb809cfc | 2003 | template<typename _Up> |
29928af2 | 2004 | struct __decay_selector<_Up, false, false> |
2005 | { typedef typename remove_cv<_Up>::type __type; }; | |
2006 | ||
fb809cfc | 2007 | template<typename _Up> |
29928af2 | 2008 | struct __decay_selector<_Up, true, false> |
2009 | { typedef typename remove_extent<_Up>::type* __type; }; | |
2010 | ||
fb809cfc | 2011 | template<typename _Up> |
29928af2 | 2012 | struct __decay_selector<_Up, false, true> |
2013 | { typedef typename add_pointer<_Up>::type __type; }; | |
2014 | ||
2015 | /// decay | |
fb809cfc | 2016 | template<typename _Tp> |
2017 | class decay | |
2018 | { | |
29928af2 | 2019 | typedef typename remove_reference<_Tp>::type __remove_type; |
2020 | ||
2021 | public: | |
2022 | typedef typename __decay_selector<__remove_type>::__type type; | |
2023 | }; | |
2024 | ||
2025 | template<typename _Tp> | |
2026 | class reference_wrapper; | |
2027 | ||
2028 | // Helper which adds a reference to a type when given a reference_wrapper | |
2029 | template<typename _Tp> | |
2030 | struct __strip_reference_wrapper | |
2031 | { | |
2032 | typedef _Tp __type; | |
2033 | }; | |
2034 | ||
2035 | template<typename _Tp> | |
2036 | struct __strip_reference_wrapper<reference_wrapper<_Tp> > | |
2037 | { | |
2038 | typedef _Tp& __type; | |
2039 | }; | |
2040 | ||
29928af2 | 2041 | template<typename _Tp> |
2042 | struct __decay_and_strip | |
2043 | { | |
2044 | typedef typename __strip_reference_wrapper< | |
2045 | typename decay<_Tp>::type>::__type __type; | |
2046 | }; | |
2047 | ||
2048 | ||
29928af2 | 2049 | // Primary template. |
3598538c | 2050 | /// Define a member typedef @c type only if a boolean constant is true. |
29928af2 | 2051 | template<bool, typename _Tp = void> |
fb809cfc | 2052 | struct enable_if |
29928af2 | 2053 | { }; |
2054 | ||
2055 | // Partial specialization for true. | |
2056 | template<typename _Tp> | |
2057 | struct enable_if<true, _Tp> | |
2058 | { typedef _Tp type; }; | |
2059 | ||
168d2274 | 2060 | template<typename... _Cond> |
2061 | using _Require = typename enable_if<__and_<_Cond...>::value>::type; | |
29928af2 | 2062 | |
29928af2 | 2063 | // Primary template. |
3598538c | 2064 | /// Define a member typedef @c type to one of two argument types. |
29928af2 | 2065 | template<bool _Cond, typename _Iftrue, typename _Iffalse> |
2066 | struct conditional | |
2067 | { typedef _Iftrue type; }; | |
2068 | ||
2069 | // Partial specialization for false. | |
2070 | template<typename _Iftrue, typename _Iffalse> | |
2071 | struct conditional<false, _Iftrue, _Iffalse> | |
2072 | { typedef _Iffalse type; }; | |
2073 | ||
a9ae69b5 | 2074 | // __void_t (std::void_t for C++11) |
2075 | template<typename...> using __void_t = void; | |
2076 | ||
97a32de0 | 2077 | /// common_type |
393a4e4b | 2078 | template<typename... _Tp> |
2079 | struct common_type; | |
2080 | ||
8b3d154c | 2081 | // Sfinae-friendly common_type implementation: |
7ee204d2 | 2082 | |
2083 | struct __do_common_type_impl | |
2084 | { | |
2085 | template<typename _Tp, typename _Up> | |
a9ae69b5 | 2086 | using __cond_t |
2087 | = decltype(true ? std::declval<_Tp>() : std::declval<_Up>()); | |
2088 | ||
2089 | template<typename _Tp, typename _Up> | |
2090 | static __success_type<typename decay<__cond_t<_Tp, _Up>>::type> | |
2091 | _S_test(int); | |
7ee204d2 | 2092 | |
2093 | template<typename, typename> | |
a9ae69b5 | 2094 | static __failure_type |
2095 | _S_test(...); | |
7ee204d2 | 2096 | }; |
2097 | ||
a9ae69b5 | 2098 | // If sizeof...(T) is zero, there shall be no member type. |
2099 | template<> | |
2100 | struct common_type<> | |
2101 | { }; | |
7ee204d2 | 2102 | |
a9ae69b5 | 2103 | // If sizeof...(T) is one, the same type, if any, as common_type_t<T0, T0>. |
2104 | template<typename _Tp0> | |
2105 | struct common_type<_Tp0> | |
2106 | : public common_type<_Tp0, _Tp0> | |
2107 | { }; | |
7ee204d2 | 2108 | |
a9ae69b5 | 2109 | // If sizeof...(T) is two, ... |
2110 | template<typename _Tp1, typename _Tp2, | |
2111 | typename _Dp1 = typename decay<_Tp1>::type, | |
2112 | typename _Dp2 = typename decay<_Tp2>::type> | |
2113 | struct __common_type_impl | |
7ee204d2 | 2114 | { |
a9ae69b5 | 2115 | // If is_same_v<T1, D1> is false or is_same_v<T2, D2> is false, |
2116 | // let C denote the same type, if any, as common_type_t<D1, D2>. | |
2117 | using type = common_type<_Dp1, _Dp2>; | |
7ee204d2 | 2118 | }; |
2119 | ||
a9ae69b5 | 2120 | template<typename _Tp1, typename _Tp2> |
2121 | struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2> | |
2122 | : private __do_common_type_impl | |
7ee204d2 | 2123 | { |
a9ae69b5 | 2124 | // Otherwise, if decay_t<decltype(false ? declval<D1>() : declval<D2>())> |
2125 | // denotes a valid type, let C denote that type. | |
2126 | using type = decltype(_S_test<_Tp1, _Tp2>(0)); | |
7ee204d2 | 2127 | }; |
2128 | ||
a9ae69b5 | 2129 | // If sizeof...(T) is two, ... |
2130 | template<typename _Tp1, typename _Tp2> | |
2131 | struct common_type<_Tp1, _Tp2> | |
2132 | : public __common_type_impl<_Tp1, _Tp2>::type | |
2133 | { }; | |
7ee204d2 | 2134 | |
a9ae69b5 | 2135 | template<typename...> |
2136 | struct __common_type_pack | |
e32f625e | 2137 | { }; |
2138 | ||
a9ae69b5 | 2139 | template<typename, typename, typename = void> |
2140 | struct __common_type_fold; | |
2141 | ||
2142 | // If sizeof...(T) is greater than two, ... | |
2143 | template<typename _Tp1, typename _Tp2, typename... _Rp> | |
2144 | struct common_type<_Tp1, _Tp2, _Rp...> | |
2145 | : public __common_type_fold<common_type<_Tp1, _Tp2>, | |
2146 | __common_type_pack<_Rp...>> | |
e32f625e | 2147 | { }; |
393a4e4b | 2148 | |
a9ae69b5 | 2149 | // Let C denote the same type, if any, as common_type_t<T1, T2>. |
2150 | // If there is such a type C, type shall denote the same type, if any, | |
2151 | // as common_type_t<C, R...>. | |
2152 | template<typename _CTp, typename... _Rp> | |
2153 | struct __common_type_fold<_CTp, __common_type_pack<_Rp...>, | |
2154 | __void_t<typename _CTp::type>> | |
2155 | : public common_type<typename _CTp::type, _Rp...> | |
7ee204d2 | 2156 | { }; |
393a4e4b | 2157 | |
a9ae69b5 | 2158 | // Otherwise, there shall be no member type. |
2159 | template<typename _CTp, typename _Rp> | |
2160 | struct __common_type_fold<_CTp, _Rp, void> | |
7ee204d2 | 2161 | { }; |
08ab8a87 | 2162 | |
87798f3f | 2163 | template<typename _Tp, bool = is_enum<_Tp>::value> |
2164 | struct __underlying_type_impl | |
2165 | { | |
2166 | using type = __underlying_type(_Tp); | |
2167 | }; | |
2168 | ||
2169 | template<typename _Tp> | |
2170 | struct __underlying_type_impl<_Tp, false> | |
2171 | { }; | |
2172 | ||
3598538c | 2173 | /// The underlying type of an enum. |
86196097 | 2174 | template<typename _Tp> |
2175 | struct underlying_type | |
87798f3f | 2176 | : public __underlying_type_impl<_Tp> |
2177 | { }; | |
29928af2 | 2178 | |
08ab8a87 | 2179 | template<typename _Tp> |
2180 | struct __declval_protector | |
2181 | { | |
2182 | static const bool __stop = false; | |
08ab8a87 | 2183 | }; |
2184 | ||
2185 | template<typename _Tp> | |
e4bb5efb | 2186 | auto declval() noexcept -> decltype(__declval<_Tp>(0)) |
08ab8a87 | 2187 | { |
2188 | static_assert(__declval_protector<_Tp>::__stop, | |
2189 | "declval() must not be used!"); | |
e4bb5efb | 2190 | return __declval<_Tp>(0); |
08ab8a87 | 2191 | } |
776274ce | 2192 | |
eb259a42 | 2193 | // __remove_cvref_t (std::remove_cvref_t for C++11). |
2194 | template<typename _Tp> | |
2195 | using __remove_cvref_t | |
2196 | = typename remove_cv<typename remove_reference<_Tp>::type>::type; | |
2197 | ||
409e2405 | 2198 | /// result_of |
2199 | template<typename _Signature> | |
2200 | class result_of; | |
2201 | ||
8b3d154c | 2202 | // Sfinae-friendly result_of implementation: |
be513f90 | 2203 | |
f6751ff2 | 2204 | #define __cpp_lib_result_of_sfinae 201210 |
2205 | ||
50e770f6 | 2206 | struct __invoke_memfun_ref { }; |
2207 | struct __invoke_memfun_deref { }; | |
2208 | struct __invoke_memobj_ref { }; | |
2209 | struct __invoke_memobj_deref { }; | |
2210 | struct __invoke_other { }; | |
2211 | ||
2212 | // Associate a tag type with a specialization of __success_type. | |
2213 | template<typename _Tp, typename _Tag> | |
2214 | struct __result_of_success : __success_type<_Tp> | |
2215 | { using __invoke_type = _Tag; }; | |
2216 | ||
be513f90 | 2217 | // [func.require] paragraph 1 bullet 1: |
2218 | struct __result_of_memfun_ref_impl | |
2219 | { | |
2220 | template<typename _Fp, typename _Tp1, typename... _Args> | |
50e770f6 | 2221 | static __result_of_success<decltype( |
be513f90 | 2222 | (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...) |
50e770f6 | 2223 | ), __invoke_memfun_ref> _S_test(int); |
be513f90 | 2224 | |
2225 | template<typename...> | |
2226 | static __failure_type _S_test(...); | |
2227 | }; | |
2228 | ||
2229 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2230 | struct __result_of_memfun_ref | |
2231 | : private __result_of_memfun_ref_impl | |
2232 | { | |
2233 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2234 | }; | |
2235 | ||
2236 | // [func.require] paragraph 1 bullet 2: | |
2237 | struct __result_of_memfun_deref_impl | |
2238 | { | |
2239 | template<typename _Fp, typename _Tp1, typename... _Args> | |
50e770f6 | 2240 | static __result_of_success<decltype( |
be513f90 | 2241 | ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...) |
50e770f6 | 2242 | ), __invoke_memfun_deref> _S_test(int); |
be513f90 | 2243 | |
2244 | template<typename...> | |
2245 | static __failure_type _S_test(...); | |
2246 | }; | |
2247 | ||
2248 | template<typename _MemPtr, typename _Arg, typename... _Args> | |
2249 | struct __result_of_memfun_deref | |
2250 | : private __result_of_memfun_deref_impl | |
2251 | { | |
2252 | typedef decltype(_S_test<_MemPtr, _Arg, _Args...>(0)) type; | |
2253 | }; | |
2254 | ||
2255 | // [func.require] paragraph 1 bullet 3: | |
2256 | struct __result_of_memobj_ref_impl | |
2257 | { | |
2258 | template<typename _Fp, typename _Tp1> | |
50e770f6 | 2259 | static __result_of_success<decltype( |
be513f90 | 2260 | std::declval<_Tp1>().*std::declval<_Fp>() |
50e770f6 | 2261 | ), __invoke_memobj_ref> _S_test(int); |
be513f90 | 2262 | |
2263 | template<typename, typename> | |
2264 | static __failure_type _S_test(...); | |
2265 | }; | |
2266 | ||
2267 | template<typename _MemPtr, typename _Arg> | |
2268 | struct __result_of_memobj_ref | |
2269 | : private __result_of_memobj_ref_impl | |
2270 | { | |
2271 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2272 | }; | |
2273 | ||
2274 | // [func.require] paragraph 1 bullet 4: | |
2275 | struct __result_of_memobj_deref_impl | |
2276 | { | |
2277 | template<typename _Fp, typename _Tp1> | |
50e770f6 | 2278 | static __result_of_success<decltype( |
be513f90 | 2279 | (*std::declval<_Tp1>()).*std::declval<_Fp>() |
50e770f6 | 2280 | ), __invoke_memobj_deref> _S_test(int); |
be513f90 | 2281 | |
2282 | template<typename, typename> | |
2283 | static __failure_type _S_test(...); | |
2284 | }; | |
2285 | ||
409e2405 | 2286 | template<typename _MemPtr, typename _Arg> |
be513f90 | 2287 | struct __result_of_memobj_deref |
2288 | : private __result_of_memobj_deref_impl | |
2289 | { | |
2290 | typedef decltype(_S_test<_MemPtr, _Arg>(0)) type; | |
2291 | }; | |
2292 | ||
2293 | template<typename _MemPtr, typename _Arg> | |
2294 | struct __result_of_memobj; | |
409e2405 | 2295 | |
2296 | template<typename _Res, typename _Class, typename _Arg> | |
be513f90 | 2297 | struct __result_of_memobj<_Res _Class::*, _Arg> |
409e2405 | 2298 | { |
eb259a42 | 2299 | typedef __remove_cvref_t<_Arg> _Argval; |
be513f90 | 2300 | typedef _Res _Class::* _MemPtr; |
2301 | typedef typename conditional<__or_<is_same<_Argval, _Class>, | |
2302 | is_base_of<_Class, _Argval>>::value, | |
2303 | __result_of_memobj_ref<_MemPtr, _Arg>, | |
2304 | __result_of_memobj_deref<_MemPtr, _Arg> | |
2305 | >::type::type type; | |
409e2405 | 2306 | }; |
2307 | ||
be513f90 | 2308 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2309 | struct __result_of_memfun; | |
409e2405 | 2310 | |
2311 | template<typename _Res, typename _Class, typename _Arg, typename... _Args> | |
be513f90 | 2312 | struct __result_of_memfun<_Res _Class::*, _Arg, _Args...> |
409e2405 | 2313 | { |
14710c9d | 2314 | typedef typename remove_reference<_Arg>::type _Argval; |
be513f90 | 2315 | typedef _Res _Class::* _MemPtr; |
14710c9d | 2316 | typedef typename conditional<is_base_of<_Class, _Argval>::value, |
be513f90 | 2317 | __result_of_memfun_ref<_MemPtr, _Arg, _Args...>, |
2318 | __result_of_memfun_deref<_MemPtr, _Arg, _Args...> | |
2319 | >::type::type type; | |
409e2405 | 2320 | }; |
2321 | ||
50e770f6 | 2322 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
2323 | // 2219. INVOKE-ing a pointer to member with a reference_wrapper | |
2324 | // as the object expression | |
50e770f6 | 2325 | |
f9eb8410 | 2326 | // Used by result_of, invoke etc. to unwrap a reference_wrapper. |
14710c9d | 2327 | template<typename _Tp, typename _Up = __remove_cvref_t<_Tp>> |
f9eb8410 | 2328 | struct __inv_unwrap |
2329 | { | |
2330 | using type = _Tp; | |
2331 | }; | |
0ca0e471 | 2332 | |
f9eb8410 | 2333 | template<typename _Tp, typename _Up> |
2334 | struct __inv_unwrap<_Tp, reference_wrapper<_Up>> | |
2335 | { | |
2336 | using type = _Up&; | |
2337 | }; | |
50e770f6 | 2338 | |
409e2405 | 2339 | template<bool, bool, typename _Functor, typename... _ArgTypes> |
be513f90 | 2340 | struct __result_of_impl |
409e2405 | 2341 | { |
be513f90 | 2342 | typedef __failure_type type; |
409e2405 | 2343 | }; |
2344 | ||
2345 | template<typename _MemPtr, typename _Arg> | |
be513f90 | 2346 | struct __result_of_impl<true, false, _MemPtr, _Arg> |
f9eb8410 | 2347 | : public __result_of_memobj<typename decay<_MemPtr>::type, |
2348 | typename __inv_unwrap<_Arg>::type> | |
bff619dc | 2349 | { }; |
409e2405 | 2350 | |
be513f90 | 2351 | template<typename _MemPtr, typename _Arg, typename... _Args> |
2352 | struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...> | |
f9eb8410 | 2353 | : public __result_of_memfun<typename decay<_MemPtr>::type, |
2354 | typename __inv_unwrap<_Arg>::type, _Args...> | |
bff619dc | 2355 | { }; |
409e2405 | 2356 | |
be513f90 | 2357 | // [func.require] paragraph 1 bullet 5: |
2358 | struct __result_of_other_impl | |
2359 | { | |
2360 | template<typename _Fn, typename... _Args> | |
50e770f6 | 2361 | static __result_of_success<decltype( |
be513f90 | 2362 | std::declval<_Fn>()(std::declval<_Args>()...) |
50e770f6 | 2363 | ), __invoke_other> _S_test(int); |
be513f90 | 2364 | |
2365 | template<typename...> | |
2366 | static __failure_type _S_test(...); | |
2367 | }; | |
2368 | ||
409e2405 | 2369 | template<typename _Functor, typename... _ArgTypes> |
be513f90 | 2370 | struct __result_of_impl<false, false, _Functor, _ArgTypes...> |
2371 | : private __result_of_other_impl | |
409e2405 | 2372 | { |
be513f90 | 2373 | typedef decltype(_S_test<_Functor, _ArgTypes...>(0)) type; |
409e2405 | 2374 | }; |
2375 | ||
f9eb8410 | 2376 | // __invoke_result (std::invoke_result for C++11) |
be513f90 | 2377 | template<typename _Functor, typename... _ArgTypes> |
f9eb8410 | 2378 | struct __invoke_result |
be513f90 | 2379 | : public __result_of_impl< |
2380 | is_member_object_pointer< | |
2381 | typename remove_reference<_Functor>::type | |
2382 | >::value, | |
2383 | is_member_function_pointer< | |
2384 | typename remove_reference<_Functor>::type | |
2385 | >::value, | |
f9eb8410 | 2386 | _Functor, _ArgTypes... |
be513f90 | 2387 | >::type |
2388 | { }; | |
8b3d154c | 2389 | |
f9eb8410 | 2390 | template<typename _Functor, typename... _ArgTypes> |
2391 | struct result_of<_Functor(_ArgTypes...)> | |
2392 | : public __invoke_result<_Functor, _ArgTypes...> | |
2393 | { }; | |
2394 | ||
7b4c9af9 | 2395 | #if __cplusplus >= 201402L |
2cff5b9a | 2396 | /// Alias template for aligned_storage |
2397 | template<size_t _Len, size_t _Align = | |
2398 | __alignof__(typename __aligned_storage_msa<_Len>::__type)> | |
2399 | using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; | |
2400 | ||
270bb80f | 2401 | template <size_t _Len, typename... _Types> |
2402 | using aligned_union_t = typename aligned_union<_Len, _Types...>::type; | |
2403 | ||
2cff5b9a | 2404 | /// Alias template for decay |
2405 | template<typename _Tp> | |
2406 | using decay_t = typename decay<_Tp>::type; | |
2407 | ||
2408 | /// Alias template for enable_if | |
2409 | template<bool _Cond, typename _Tp = void> | |
2410 | using enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2411 | ||
2412 | /// Alias template for conditional | |
2413 | template<bool _Cond, typename _Iftrue, typename _Iffalse> | |
2414 | using conditional_t = typename conditional<_Cond, _Iftrue, _Iffalse>::type; | |
2415 | ||
2416 | /// Alias template for common_type | |
2417 | template<typename... _Tp> | |
2418 | using common_type_t = typename common_type<_Tp...>::type; | |
2419 | ||
2420 | /// Alias template for underlying_type | |
2421 | template<typename _Tp> | |
2422 | using underlying_type_t = typename underlying_type<_Tp>::type; | |
2423 | ||
2424 | /// Alias template for result_of | |
2425 | template<typename _Tp> | |
2426 | using result_of_t = typename result_of<_Tp>::type; | |
7b4c9af9 | 2427 | #endif // C++14 |
2428 | ||
2429 | // __enable_if_t (std::enable_if_t for C++11) | |
2430 | template<bool _Cond, typename _Tp = void> | |
2431 | using __enable_if_t = typename enable_if<_Cond, _Tp>::type; | |
2cff5b9a | 2432 | |
7b4c9af9 | 2433 | #if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++11 |
75907ee6 | 2434 | #define __cpp_lib_void_t 201411 |
2435 | /// A metafunction that always yields void, used for detecting valid types. | |
2436 | template<typename...> using void_t = void; | |
2437 | #endif | |
2438 | ||
ea105790 | 2439 | /// Implementation of the detection idiom (negative case). |
2440 | template<typename _Default, typename _AlwaysVoid, | |
2441 | template<typename...> class _Op, typename... _Args> | |
2442 | struct __detector | |
2443 | { | |
2444 | using value_t = false_type; | |
2445 | using type = _Default; | |
2446 | }; | |
2447 | ||
2448 | /// Implementation of the detection idiom (positive case). | |
2449 | template<typename _Default, template<typename...> class _Op, | |
2450 | typename... _Args> | |
2451 | struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...> | |
2452 | { | |
2453 | using value_t = true_type; | |
2454 | using type = _Op<_Args...>; | |
2455 | }; | |
2456 | ||
2457 | // Detect whether _Op<_Args...> is a valid type, use _Default if not. | |
2458 | template<typename _Default, template<typename...> class _Op, | |
2459 | typename... _Args> | |
2460 | using __detected_or = __detector<_Default, void, _Op, _Args...>; | |
2461 | ||
2462 | // _Op<_Args...> if that is a valid type, otherwise _Default. | |
2463 | template<typename _Default, template<typename...> class _Op, | |
2464 | typename... _Args> | |
2465 | using __detected_or_t | |
2466 | = typename __detected_or<_Default, _Op, _Args...>::type; | |
2467 | ||
8b3d154c | 2468 | /// @} group metaprogramming |
bf564680 | 2469 | |
aa9fc7f7 | 2470 | /** |
2471 | * Use SFINAE to determine if the type _Tp has a publicly-accessible | |
2472 | * member type _NTYPE. | |
2473 | */ | |
c6e805a7 | 2474 | #define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \ |
bf564680 | 2475 | template<typename _Tp, typename = __void_t<>> \ |
c6e805a7 | 2476 | struct __has_##_NTYPE \ |
bf564680 | 2477 | : false_type \ |
2478 | { }; \ | |
2479 | template<typename _Tp> \ | |
2480 | struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \ | |
2481 | : true_type \ | |
aa9fc7f7 | 2482 | { }; |
2483 | ||
03ff0289 | 2484 | template <typename _Tp> |
2485 | struct __is_swappable; | |
b5773487 | 2486 | |
03ff0289 | 2487 | template <typename _Tp> |
2488 | struct __is_nothrow_swappable; | |
b5773487 | 2489 | |
f89b61dd | 2490 | template<typename... _Elements> |
2491 | class tuple; | |
2492 | ||
2493 | template<typename> | |
2494 | struct __is_tuple_like_impl : false_type | |
2495 | { }; | |
2496 | ||
2497 | template<typename... _Tps> | |
2498 | struct __is_tuple_like_impl<tuple<_Tps...>> : true_type | |
2499 | { }; | |
2500 | ||
2501 | // Internal type trait that allows us to sfinae-protect tuple_cat. | |
2502 | template<typename _Tp> | |
2503 | struct __is_tuple_like | |
eb259a42 | 2504 | : public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type |
f89b61dd | 2505 | { }; |
2506 | ||
b5773487 | 2507 | template<typename _Tp> |
2508 | inline | |
f89b61dd | 2509 | typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>, |
2510 | is_move_constructible<_Tp>, | |
b5773487 | 2511 | is_move_assignable<_Tp>>::value>::type |
2512 | swap(_Tp&, _Tp&) | |
2513 | noexcept(__and_<is_nothrow_move_constructible<_Tp>, | |
2514 | is_nothrow_move_assignable<_Tp>>::value); | |
2515 | ||
2516 | template<typename _Tp, size_t _Nm> | |
2517 | inline | |
03ff0289 | 2518 | typename enable_if<__is_swappable<_Tp>::value>::type |
b5773487 | 2519 | swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) |
03ff0289 | 2520 | noexcept(__is_nothrow_swappable<_Tp>::value); |
b5773487 | 2521 | |
03ff0289 | 2522 | namespace __swappable_details { |
b5773487 | 2523 | using std::swap; |
2524 | ||
03ff0289 | 2525 | struct __do_is_swappable_impl |
2526 | { | |
2527 | template<typename _Tp, typename | |
2528 | = decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))> | |
2529 | static true_type __test(int); | |
2530 | ||
2531 | template<typename> | |
2532 | static false_type __test(...); | |
2533 | }; | |
2534 | ||
2535 | struct __do_is_nothrow_swappable_impl | |
2536 | { | |
2537 | template<typename _Tp> | |
2538 | static __bool_constant< | |
2539 | noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>())) | |
2540 | > __test(int); | |
2541 | ||
2542 | template<typename> | |
2543 | static false_type __test(...); | |
2544 | }; | |
2545 | ||
ca9fde3d | 2546 | } // namespace __swappable_details |
b5773487 | 2547 | |
03ff0289 | 2548 | template<typename _Tp> |
2549 | struct __is_swappable_impl | |
2550 | : public __swappable_details::__do_is_swappable_impl | |
2551 | { | |
2552 | typedef decltype(__test<_Tp>(0)) type; | |
2553 | }; | |
2554 | ||
2555 | template<typename _Tp> | |
b5773487 | 2556 | struct __is_nothrow_swappable_impl |
03ff0289 | 2557 | : public __swappable_details::__do_is_nothrow_swappable_impl |
2558 | { | |
2559 | typedef decltype(__test<_Tp>(0)) type; | |
2560 | }; | |
b5773487 | 2561 | |
03ff0289 | 2562 | template<typename _Tp> |
2563 | struct __is_swappable | |
2564 | : public __is_swappable_impl<_Tp>::type | |
b5773487 | 2565 | { }; |
2566 | ||
03ff0289 | 2567 | template<typename _Tp> |
b5773487 | 2568 | struct __is_nothrow_swappable |
03ff0289 | 2569 | : public __is_nothrow_swappable_impl<_Tp>::type |
b5773487 | 2570 | { }; |
2571 | ||
ca9fde3d | 2572 | #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11 |
2573 | #define __cpp_lib_is_swappable 201603 | |
2574 | /// Metafunctions used for detecting swappable types: p0185r1 | |
2575 | ||
2576 | /// is_swappable | |
2577 | template<typename _Tp> | |
2578 | struct is_swappable | |
2579 | : public __is_swappable_impl<_Tp>::type | |
2580 | { }; | |
2581 | ||
2582 | /// is_nothrow_swappable | |
2583 | template<typename _Tp> | |
2584 | struct is_nothrow_swappable | |
2585 | : public __is_nothrow_swappable_impl<_Tp>::type | |
2586 | { }; | |
2587 | ||
2588 | #if __cplusplus >= 201402L | |
2589 | /// is_swappable_v | |
2590 | template<typename _Tp> | |
b5492afc | 2591 | _GLIBCXX17_INLINE constexpr bool is_swappable_v = |
2592 | is_swappable<_Tp>::value; | |
ca9fde3d | 2593 | |
2594 | /// is_nothrow_swappable_v | |
2595 | template<typename _Tp> | |
b5492afc | 2596 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_v = |
2597 | is_nothrow_swappable<_Tp>::value; | |
ca9fde3d | 2598 | #endif // __cplusplus >= 201402L |
2599 | ||
2600 | namespace __swappable_with_details { | |
2601 | using std::swap; | |
2602 | ||
2603 | struct __do_is_swappable_with_impl | |
2604 | { | |
2605 | template<typename _Tp, typename _Up, typename | |
2606 | = decltype(swap(std::declval<_Tp>(), std::declval<_Up>())), | |
2607 | typename | |
2608 | = decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))> | |
2609 | static true_type __test(int); | |
2610 | ||
2611 | template<typename, typename> | |
2612 | static false_type __test(...); | |
2613 | }; | |
2614 | ||
2615 | struct __do_is_nothrow_swappable_with_impl | |
2616 | { | |
2617 | template<typename _Tp, typename _Up> | |
2618 | static __bool_constant< | |
2619 | noexcept(swap(std::declval<_Tp>(), std::declval<_Up>())) | |
2620 | && | |
2621 | noexcept(swap(std::declval<_Up>(), std::declval<_Tp>())) | |
2622 | > __test(int); | |
2623 | ||
2624 | template<typename, typename> | |
2625 | static false_type __test(...); | |
2626 | }; | |
2627 | ||
2628 | } // namespace __swappable_with_details | |
2629 | ||
2630 | template<typename _Tp, typename _Up> | |
2631 | struct __is_swappable_with_impl | |
2632 | : public __swappable_with_details::__do_is_swappable_with_impl | |
2633 | { | |
2634 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2635 | }; | |
2636 | ||
2637 | // Optimization for the homogenous lvalue case, not required: | |
2638 | template<typename _Tp> | |
2639 | struct __is_swappable_with_impl<_Tp&, _Tp&> | |
2640 | : public __swappable_details::__do_is_swappable_impl | |
2641 | { | |
2642 | typedef decltype(__test<_Tp&>(0)) type; | |
2643 | }; | |
2644 | ||
2645 | template<typename _Tp, typename _Up> | |
2646 | struct __is_nothrow_swappable_with_impl | |
2647 | : public __swappable_with_details::__do_is_nothrow_swappable_with_impl | |
2648 | { | |
2649 | typedef decltype(__test<_Tp, _Up>(0)) type; | |
2650 | }; | |
2651 | ||
2652 | // Optimization for the homogenous lvalue case, not required: | |
2653 | template<typename _Tp> | |
2654 | struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&> | |
2655 | : public __swappable_details::__do_is_nothrow_swappable_impl | |
2656 | { | |
2657 | typedef decltype(__test<_Tp&>(0)) type; | |
2658 | }; | |
2659 | ||
2660 | /// is_swappable_with | |
2661 | template<typename _Tp, typename _Up> | |
2662 | struct is_swappable_with | |
2663 | : public __is_swappable_with_impl<_Tp, _Up>::type | |
2664 | { }; | |
2665 | ||
2666 | /// is_nothrow_swappable_with | |
2667 | template<typename _Tp, typename _Up> | |
2668 | struct is_nothrow_swappable_with | |
2669 | : public __is_nothrow_swappable_with_impl<_Tp, _Up>::type | |
2670 | { }; | |
2671 | ||
2672 | #if __cplusplus >= 201402L | |
2673 | /// is_swappable_with_v | |
2674 | template<typename _Tp, typename _Up> | |
b5492afc | 2675 | _GLIBCXX17_INLINE constexpr bool is_swappable_with_v = |
2676 | is_swappable_with<_Tp, _Up>::value; | |
ca9fde3d | 2677 | |
2678 | /// is_nothrow_swappable_with_v | |
2679 | template<typename _Tp, typename _Up> | |
b5492afc | 2680 | _GLIBCXX17_INLINE constexpr bool is_nothrow_swappable_with_v = |
ca9fde3d | 2681 | is_nothrow_swappable_with<_Tp, _Up>::value; |
2682 | #endif // __cplusplus >= 201402L | |
1615843f | 2683 | |
93a31400 | 2684 | #endif// c++1z or gnu++11 |
2685 | ||
f9eb8410 | 2686 | // __is_invocable (std::is_invocable for C++11) |
93a31400 | 2687 | |
f9eb8410 | 2688 | template<typename _Result, typename _Ret, typename = void> |
2689 | struct __is_invocable_impl : false_type { }; | |
93a31400 | 2690 | |
2691 | template<typename _Result, typename _Ret> | |
f9eb8410 | 2692 | struct __is_invocable_impl<_Result, _Ret, __void_t<typename _Result::type>> |
e3bdc0bb | 2693 | : __or_<is_void<_Ret>, is_convertible<typename _Result::type, _Ret>>::type |
93a31400 | 2694 | { }; |
2695 | ||
f9eb8410 | 2696 | template<typename _Fn, typename... _ArgTypes> |
2697 | struct __is_invocable | |
2698 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
93a31400 | 2699 | { }; |
2700 | ||
93a31400 | 2701 | template<typename _Fn, typename _Tp, typename... _Args> |
2702 | constexpr bool __call_is_nt(__invoke_memfun_ref) | |
2703 | { | |
2704 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2705 | return noexcept((std::declval<_Up>().*std::declval<_Fn>())( | |
2706 | std::declval<_Args>()...)); | |
2707 | } | |
2708 | ||
2709 | template<typename _Fn, typename _Tp, typename... _Args> | |
2710 | constexpr bool __call_is_nt(__invoke_memfun_deref) | |
2711 | { | |
2712 | return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())( | |
2713 | std::declval<_Args>()...)); | |
2714 | } | |
2715 | ||
2716 | template<typename _Fn, typename _Tp> | |
2717 | constexpr bool __call_is_nt(__invoke_memobj_ref) | |
2718 | { | |
2719 | using _Up = typename __inv_unwrap<_Tp>::type; | |
2720 | return noexcept(std::declval<_Up>().*std::declval<_Fn>()); | |
2721 | } | |
2722 | ||
2723 | template<typename _Fn, typename _Tp> | |
2724 | constexpr bool __call_is_nt(__invoke_memobj_deref) | |
2725 | { | |
2726 | return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>()); | |
2727 | } | |
2728 | ||
2729 | template<typename _Fn, typename... _Args> | |
2730 | constexpr bool __call_is_nt(__invoke_other) | |
2731 | { | |
2732 | return noexcept(std::declval<_Fn>()(std::declval<_Args>()...)); | |
2733 | } | |
2734 | ||
f9eb8410 | 2735 | template<typename _Result, typename _Fn, typename... _Args> |
93a31400 | 2736 | struct __call_is_nothrow |
2737 | : __bool_constant< | |
f9eb8410 | 2738 | std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{}) |
2739 | > | |
93a31400 | 2740 | { }; |
2741 | ||
f9eb8410 | 2742 | template<typename _Fn, typename... _Args> |
2743 | using __call_is_nothrow_ | |
2744 | = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>; | |
93a31400 | 2745 | |
f9eb8410 | 2746 | // __is_nothrow_invocable (std::is_nothrow_invocable for C++11) |
2747 | template<typename _Fn, typename... _Args> | |
2748 | struct __is_nothrow_invocable | |
2749 | : __and_<__is_invocable<_Fn, _Args...>, | |
2750 | __call_is_nothrow_<_Fn, _Args...>>::type | |
93a31400 | 2751 | { }; |
2752 | ||
b8dcd41e | 2753 | struct __nonesuchbase {}; |
2754 | struct __nonesuch : private __nonesuchbase { | |
2d0ecf58 | 2755 | ~__nonesuch() = delete; |
2756 | __nonesuch(__nonesuch const&) = delete; | |
2757 | void operator=(__nonesuch const&) = delete; | |
2758 | }; | |
2759 | ||
801c4b5d | 2760 | #if __cplusplus >= 201703L |
f9eb8410 | 2761 | # define __cpp_lib_is_invocable 201703 |
2762 | ||
2763 | /// std::invoke_result | |
2764 | template<typename _Functor, typename... _ArgTypes> | |
2765 | struct invoke_result | |
2766 | : public __invoke_result<_Functor, _ArgTypes...> | |
2767 | { }; | |
2768 | ||
2769 | /// std::invoke_result_t | |
2770 | template<typename _Fn, typename... _Args> | |
2771 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; | |
93a31400 | 2772 | |
f9eb8410 | 2773 | /// std::is_invocable |
2774 | template<typename _Fn, typename... _ArgTypes> | |
2775 | struct is_invocable | |
2776 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type | |
2777 | { }; | |
93a31400 | 2778 | |
f9eb8410 | 2779 | /// std::is_invocable_r |
2780 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
2781 | struct is_invocable_r | |
2782 | : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type | |
93a31400 | 2783 | { }; |
2784 | ||
f9eb8410 | 2785 | /// std::is_nothrow_invocable |
2786 | template<typename _Fn, typename... _ArgTypes> | |
2787 | struct is_nothrow_invocable | |
2788 | : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>, | |
2789 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type | |
2790 | { }; | |
93a31400 | 2791 | |
c52a6a55 | 2792 | template<typename _Result, typename _Ret, typename = void> |
2793 | struct __is_nt_invocable_impl : false_type { }; | |
2794 | ||
2795 | template<typename _Result, typename _Ret> | |
2796 | struct __is_nt_invocable_impl<_Result, _Ret, | |
2797 | __void_t<typename _Result::type>> | |
e3bdc0bb | 2798 | : __or_<is_void<_Ret>, |
2cfc6a76 | 2799 | __is_nothrow_convertible<typename _Result::type, _Ret>> |
c52a6a55 | 2800 | { }; |
2801 | ||
f9eb8410 | 2802 | /// std::is_nothrow_invocable_r |
2803 | template<typename _Ret, typename _Fn, typename... _ArgTypes> | |
2804 | struct is_nothrow_invocable_r | |
c52a6a55 | 2805 | : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>, |
f9eb8410 | 2806 | __call_is_nothrow_<_Fn, _ArgTypes...>>::type |
93a31400 | 2807 | { }; |
2808 | ||
f9eb8410 | 2809 | /// std::is_invocable_v |
2810 | template<typename _Fn, typename... _Args> | |
2811 | inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value; | |
93a31400 | 2812 | |
f9eb8410 | 2813 | /// std::is_nothrow_invocable_v |
2814 | template<typename _Fn, typename... _Args> | |
2815 | inline constexpr bool is_nothrow_invocable_v | |
2816 | = is_nothrow_invocable<_Fn, _Args...>::value; | |
93a31400 | 2817 | |
f9eb8410 | 2818 | /// std::is_invocable_r_v |
2cfc6a76 | 2819 | template<typename _Ret, typename _Fn, typename... _Args> |
f9eb8410 | 2820 | inline constexpr bool is_invocable_r_v |
2cfc6a76 | 2821 | = is_invocable_r<_Ret, _Fn, _Args...>::value; |
f9eb8410 | 2822 | |
2823 | /// std::is_nothrow_invocable_r_v | |
2cfc6a76 | 2824 | template<typename _Ret, typename _Fn, typename... _Args> |
f9eb8410 | 2825 | inline constexpr bool is_nothrow_invocable_r_v |
2cfc6a76 | 2826 | = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; |
f9eb8410 | 2827 | #endif // C++17 |
93a31400 | 2828 | |
801c4b5d | 2829 | #if __cplusplus >= 201703L |
3b63bab2 | 2830 | # define __cpp_lib_type_trait_variable_templates 201510L |
1615843f | 2831 | template <typename _Tp> |
b5492afc | 2832 | inline constexpr bool is_void_v = is_void<_Tp>::value; |
1615843f | 2833 | template <typename _Tp> |
b5492afc | 2834 | inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; |
1615843f | 2835 | template <typename _Tp> |
b5492afc | 2836 | inline constexpr bool is_integral_v = is_integral<_Tp>::value; |
1615843f | 2837 | template <typename _Tp> |
b5492afc | 2838 | inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; |
1615843f | 2839 | template <typename _Tp> |
b5492afc | 2840 | inline constexpr bool is_array_v = is_array<_Tp>::value; |
1615843f | 2841 | template <typename _Tp> |
b5492afc | 2842 | inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |
1615843f | 2843 | template <typename _Tp> |
b5492afc | 2844 | inline constexpr bool is_lvalue_reference_v = |
2845 | is_lvalue_reference<_Tp>::value; | |
1615843f | 2846 | template <typename _Tp> |
b5492afc | 2847 | inline constexpr bool is_rvalue_reference_v = |
2848 | is_rvalue_reference<_Tp>::value; | |
1615843f | 2849 | template <typename _Tp> |
b5492afc | 2850 | inline constexpr bool is_member_object_pointer_v = |
1615843f | 2851 | is_member_object_pointer<_Tp>::value; |
2852 | template <typename _Tp> | |
b5492afc | 2853 | inline constexpr bool is_member_function_pointer_v = |
1615843f | 2854 | is_member_function_pointer<_Tp>::value; |
2855 | template <typename _Tp> | |
b5492afc | 2856 | inline constexpr bool is_enum_v = is_enum<_Tp>::value; |
1615843f | 2857 | template <typename _Tp> |
b5492afc | 2858 | inline constexpr bool is_union_v = is_union<_Tp>::value; |
1615843f | 2859 | template <typename _Tp> |
b5492afc | 2860 | inline constexpr bool is_class_v = is_class<_Tp>::value; |
1615843f | 2861 | template <typename _Tp> |
b5492afc | 2862 | inline constexpr bool is_function_v = is_function<_Tp>::value; |
1615843f | 2863 | template <typename _Tp> |
b5492afc | 2864 | inline constexpr bool is_reference_v = is_reference<_Tp>::value; |
1615843f | 2865 | template <typename _Tp> |
b5492afc | 2866 | inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; |
1615843f | 2867 | template <typename _Tp> |
b5492afc | 2868 | inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; |
1615843f | 2869 | template <typename _Tp> |
b5492afc | 2870 | inline constexpr bool is_object_v = is_object<_Tp>::value; |
1615843f | 2871 | template <typename _Tp> |
b5492afc | 2872 | inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
1615843f | 2873 | template <typename _Tp> |
b5492afc | 2874 | inline constexpr bool is_compound_v = is_compound<_Tp>::value; |
1615843f | 2875 | template <typename _Tp> |
b5492afc | 2876 | inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; |
1615843f | 2877 | template <typename _Tp> |
b5492afc | 2878 | inline constexpr bool is_const_v = is_const<_Tp>::value; |
1615843f | 2879 | template <typename _Tp> |
b5492afc | 2880 | inline constexpr bool is_volatile_v = is_volatile<_Tp>::value; |
1615843f | 2881 | template <typename _Tp> |
b5492afc | 2882 | inline constexpr bool is_trivial_v = is_trivial<_Tp>::value; |
1615843f | 2883 | template <typename _Tp> |
b5492afc | 2884 | inline constexpr bool is_trivially_copyable_v = |
2885 | is_trivially_copyable<_Tp>::value; | |
1615843f | 2886 | template <typename _Tp> |
b5492afc | 2887 | inline constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; |
1615843f | 2888 | template <typename _Tp> |
b5492afc | 2889 | inline constexpr bool is_pod_v = is_pod<_Tp>::value; |
1615843f | 2890 | template <typename _Tp> |
b5492afc | 2891 | inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; |
1615843f | 2892 | template <typename _Tp> |
b5492afc | 2893 | inline constexpr bool is_empty_v = is_empty<_Tp>::value; |
1615843f | 2894 | template <typename _Tp> |
b5492afc | 2895 | inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; |
1615843f | 2896 | template <typename _Tp> |
b5492afc | 2897 | inline constexpr bool is_abstract_v = is_abstract<_Tp>::value; |
1615843f | 2898 | template <typename _Tp> |
b5492afc | 2899 | inline constexpr bool is_final_v = is_final<_Tp>::value; |
1615843f | 2900 | template <typename _Tp> |
b5492afc | 2901 | inline constexpr bool is_signed_v = is_signed<_Tp>::value; |
1615843f | 2902 | template <typename _Tp> |
b5492afc | 2903 | inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; |
1615843f | 2904 | template <typename _Tp, typename... _Args> |
b5492afc | 2905 | inline constexpr bool is_constructible_v = |
2906 | is_constructible<_Tp, _Args...>::value; | |
1615843f | 2907 | template <typename _Tp> |
b5492afc | 2908 | inline constexpr bool is_default_constructible_v = |
1615843f | 2909 | is_default_constructible<_Tp>::value; |
2910 | template <typename _Tp> | |
b5492afc | 2911 | inline constexpr bool is_copy_constructible_v = |
2912 | is_copy_constructible<_Tp>::value; | |
1615843f | 2913 | template <typename _Tp> |
b5492afc | 2914 | inline constexpr bool is_move_constructible_v = |
2915 | is_move_constructible<_Tp>::value; | |
1615843f | 2916 | template <typename _Tp, typename _Up> |
b5492afc | 2917 | inline constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; |
1615843f | 2918 | template <typename _Tp> |
b5492afc | 2919 | inline constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; |
1615843f | 2920 | template <typename _Tp> |
b5492afc | 2921 | inline constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; |
1615843f | 2922 | template <typename _Tp> |
b5492afc | 2923 | inline constexpr bool is_destructible_v = is_destructible<_Tp>::value; |
1615843f | 2924 | template <typename _Tp, typename... _Args> |
b5492afc | 2925 | inline constexpr bool is_trivially_constructible_v = |
1615843f | 2926 | is_trivially_constructible<_Tp, _Args...>::value; |
2927 | template <typename _Tp> | |
b5492afc | 2928 | inline constexpr bool is_trivially_default_constructible_v = |
1615843f | 2929 | is_trivially_default_constructible<_Tp>::value; |
2930 | template <typename _Tp> | |
b5492afc | 2931 | inline constexpr bool is_trivially_copy_constructible_v = |
1615843f | 2932 | is_trivially_copy_constructible<_Tp>::value; |
2933 | template <typename _Tp> | |
b5492afc | 2934 | inline constexpr bool is_trivially_move_constructible_v = |
1615843f | 2935 | is_trivially_move_constructible<_Tp>::value; |
2936 | template <typename _Tp, typename _Up> | |
b5492afc | 2937 | inline constexpr bool is_trivially_assignable_v = |
1615843f | 2938 | is_trivially_assignable<_Tp, _Up>::value; |
2939 | template <typename _Tp> | |
b5492afc | 2940 | inline constexpr bool is_trivially_copy_assignable_v = |
1615843f | 2941 | is_trivially_copy_assignable<_Tp>::value; |
2942 | template <typename _Tp> | |
b5492afc | 2943 | inline constexpr bool is_trivially_move_assignable_v = |
1615843f | 2944 | is_trivially_move_assignable<_Tp>::value; |
2945 | template <typename _Tp> | |
b5492afc | 2946 | inline constexpr bool is_trivially_destructible_v = |
1615843f | 2947 | is_trivially_destructible<_Tp>::value; |
2948 | template <typename _Tp, typename... _Args> | |
b5492afc | 2949 | inline constexpr bool is_nothrow_constructible_v = |
1615843f | 2950 | is_nothrow_constructible<_Tp, _Args...>::value; |
2951 | template <typename _Tp> | |
b5492afc | 2952 | inline constexpr bool is_nothrow_default_constructible_v = |
1615843f | 2953 | is_nothrow_default_constructible<_Tp>::value; |
2954 | template <typename _Tp> | |
b5492afc | 2955 | inline constexpr bool is_nothrow_copy_constructible_v = |
1615843f | 2956 | is_nothrow_copy_constructible<_Tp>::value; |
2957 | template <typename _Tp> | |
b5492afc | 2958 | inline constexpr bool is_nothrow_move_constructible_v = |
1615843f | 2959 | is_nothrow_move_constructible<_Tp>::value; |
2960 | template <typename _Tp, typename _Up> | |
b5492afc | 2961 | inline constexpr bool is_nothrow_assignable_v = |
1615843f | 2962 | is_nothrow_assignable<_Tp, _Up>::value; |
2963 | template <typename _Tp> | |
b5492afc | 2964 | inline constexpr bool is_nothrow_copy_assignable_v = |
1615843f | 2965 | is_nothrow_copy_assignable<_Tp>::value; |
2966 | template <typename _Tp> | |
b5492afc | 2967 | inline constexpr bool is_nothrow_move_assignable_v = |
1615843f | 2968 | is_nothrow_move_assignable<_Tp>::value; |
2969 | template <typename _Tp> | |
b5492afc | 2970 | inline constexpr bool is_nothrow_destructible_v = |
1615843f | 2971 | is_nothrow_destructible<_Tp>::value; |
2972 | template <typename _Tp> | |
b5492afc | 2973 | inline constexpr bool has_virtual_destructor_v = |
1615843f | 2974 | has_virtual_destructor<_Tp>::value; |
2975 | template <typename _Tp> | |
b5492afc | 2976 | inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value; |
1615843f | 2977 | template <typename _Tp> |
b5492afc | 2978 | inline constexpr size_t rank_v = rank<_Tp>::value; |
1615843f | 2979 | template <typename _Tp, unsigned _Idx = 0> |
b5492afc | 2980 | inline constexpr size_t extent_v = extent<_Tp, _Idx>::value; |
1615843f | 2981 | template <typename _Tp, typename _Up> |
b5492afc | 2982 | inline constexpr bool is_same_v = is_same<_Tp, _Up>::value; |
1615843f | 2983 | template <typename _Base, typename _Derived> |
b5492afc | 2984 | inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; |
1615843f | 2985 | template <typename _From, typename _To> |
b5492afc | 2986 | inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value; |
9fb0e327 | 2987 | |
1ac94d7b | 2988 | #ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP |
9fb0e327 | 2989 | # define __cpp_lib_has_unique_object_representations 201606 |
2990 | /// has_unique_object_representations | |
2991 | template<typename _Tp> | |
2992 | struct has_unique_object_representations | |
2993 | : bool_constant<__has_unique_object_representations( | |
2994 | remove_cv_t<remove_all_extents_t<_Tp>> | |
2995 | )> | |
2996 | { }; | |
2656b298 | 2997 | |
2998 | template<typename _Tp> | |
2999 | inline constexpr bool has_unique_object_representations_v | |
3000 | = has_unique_object_representations<_Tp>::value; | |
f82bce06 | 3001 | #endif |
0b71441b | 3002 | |
d5337255 | 3003 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE |
3ee8fe55 | 3004 | # define __cpp_lib_is_aggregate 201703 |
0b71441b | 3005 | /// is_aggregate |
3006 | template<typename _Tp> | |
3007 | struct is_aggregate | |
3008 | : bool_constant<__is_aggregate(remove_cv_t<_Tp>)> { }; | |
3009 | ||
3010 | /// is_aggregate_v | |
3011 | template<typename _Tp> | |
3012 | inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value; | |
3013 | #endif | |
1615843f | 3014 | #endif // C++17 |
ca9fde3d | 3015 | |
801c4b5d | 3016 | #if __cplusplus > 201703L |
3017 | /// Byte order | |
3018 | enum class endian | |
3019 | { | |
3020 | little = __ORDER_LITTLE_ENDIAN__, | |
3021 | big = __ORDER_BIG_ENDIAN__, | |
3022 | native = __BYTE_ORDER__ | |
3023 | }; | |
eb259a42 | 3024 | |
3025 | /// Remove references and cv-qualifiers. | |
3026 | template<typename _Tp> | |
3027 | struct remove_cvref | |
3028 | { | |
3029 | using type = __remove_cvref_t<_Tp>; | |
3030 | }; | |
3031 | ||
3032 | template<typename _Tp> | |
3033 | using remove_cvref_t = __remove_cvref_t<_Tp>; | |
3034 | ||
7f932aca | 3035 | /// Identity metafunction. |
3036 | template<typename _Tp> | |
3037 | struct type_identity { using type = _Tp; }; | |
3038 | ||
3039 | template<typename _Tp> | |
3040 | using type_identity_t = typename type_identity<_Tp>::type; | |
3041 | ||
6ab4d870 | 3042 | /// Unwrap a reference_wrapper |
3043 | template<typename _Tp> | |
3044 | struct unwrap_reference { using type = _Tp; }; | |
3045 | ||
3046 | template<typename _Tp> | |
3047 | struct unwrap_reference<reference_wrapper<_Tp>> { using type = _Tp&; }; | |
3048 | ||
b48cc8c5 | 3049 | template<typename _Tp> |
3050 | using unwrap_reference_t = typename unwrap_reference<_Tp>::type; | |
3051 | ||
6ab4d870 | 3052 | /// Decay type and if it's a reference_wrapper, unwrap it |
3053 | template<typename _Tp> | |
b48cc8c5 | 3054 | struct unwrap_ref_decay { using type = unwrap_reference_t<decay_t<_Tp>>; }; |
6ab4d870 | 3055 | |
3056 | template<typename _Tp> | |
3057 | using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type; | |
3058 | ||
b4af2395 | 3059 | #define __cpp_lib_bounded_array_traits 201902L |
3060 | ||
a17f06b3 | 3061 | /// True for a type that is an array of known bound. |
3062 | template<typename _Tp> | |
3063 | struct is_bounded_array | |
3064 | : public __is_array_known_bounds<_Tp> | |
3065 | { }; | |
3066 | ||
3067 | /// True for a type that is an array of unknown bound. | |
3068 | template<typename _Tp> | |
3069 | struct is_unbounded_array | |
3070 | : public __is_array_unknown_bounds<_Tp> | |
3071 | { }; | |
3072 | ||
3073 | template<typename _Tp> | |
3074 | inline constexpr bool is_bounded_array_v | |
3075 | = is_bounded_array<_Tp>::value; | |
3076 | ||
3077 | template<typename _Tp> | |
3078 | inline constexpr bool is_unbounded_array_v | |
3079 | = is_unbounded_array<_Tp>::value; | |
3080 | ||
0eed6e63 | 3081 | #ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED |
d9de68bc | 3082 | |
46dd85d5 | 3083 | #define __cpp_lib_is_constant_evaluated 201811L |
d9de68bc | 3084 | |
0eed6e63 | 3085 | constexpr inline bool |
3086 | is_constant_evaluated() noexcept | |
3087 | { return __builtin_is_constant_evaluated(); } | |
3088 | #endif | |
3089 | ||
801c4b5d | 3090 | #endif // C++2a |
3091 | ||
2948dd21 | 3092 | _GLIBCXX_END_NAMESPACE_VERSION |
8b3d154c | 3093 | } // namespace std |
6b75e122 | 3094 | |
0c8766b1 | 3095 | #endif // C++11 |
34e94b7c | 3096 | |
08ab8a87 | 3097 | #endif // _GLIBCXX_TYPE_TRAITS |