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1 | // TR1 functional header -*- C++ -*- |
2 | ||
cbe34bb5 | 3 | // Copyright (C) 2004-2017 Free Software Foundation, Inc. |
f2ede5d6 BK |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
f2ede5d6 BK |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
f2ede5d6 | 19 | |
748086b7 JJ |
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/>. | |
909a9d44 | 24 | |
143c27b0 | 25 | /** @file tr1/functional |
0179f2c6 | 26 | * This is a TR1 C++ Library header. |
f2ede5d6 BK |
27 | */ |
28 | ||
e133ace8 PC |
29 | #ifndef _GLIBCXX_TR1_FUNCTIONAL |
30 | #define _GLIBCXX_TR1_FUNCTIONAL 1 | |
f2ede5d6 | 31 | |
48c410a2 PC |
32 | #pragma GCC system_header |
33 | ||
e133ace8 PC |
34 | #include <bits/c++config.h> |
35 | #include <bits/stl_function.h> | |
36 | ||
0179f2c6 | 37 | #include <typeinfo> |
6116ca65 | 38 | #include <new> |
af13a7a6 | 39 | #include <tr1/tuple> |
0179f2c6 | 40 | #include <tr1/type_traits> |
9adfc73c | 41 | #include <bits/stringfwd.h> |
e133ace8 | 42 | #include <tr1/functional_hash.h> |
f22aa574 | 43 | #include <ext/type_traits.h> |
f271b536 | 44 | #include <bits/move.h> // for std::__addressof |
734f5023 | 45 | #if __cplusplus >= 201103L |
e02a5443 JW |
46 | # include <type_traits> // for integral_constant, true_type, false_type |
47 | #endif | |
9eeea761 | 48 | |
12ffa228 | 49 | namespace std _GLIBCXX_VISIBILITY(default) |
7aec2c63 | 50 | { |
e02a5443 | 51 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
4a15d842 | 52 | #if __cplusplus >= 201103L |
e02a5443 JW |
53 | template<int> struct _Placeholder; |
54 | template<typename> class _Bind; | |
55 | template<typename, typename> class _Bind_result; | |
e02a5443 JW |
56 | #endif |
57 | ||
7aec2c63 PC |
58 | namespace tr1 |
59 | { | |
60 | template<typename _MemberPointer> | |
61 | class _Mem_fn; | |
94df301f JM |
62 | template<typename _Tp, typename _Class> |
63 | _Mem_fn<_Tp _Class::*> | |
64 | mem_fn(_Tp _Class::*); | |
7aec2c63 PC |
65 | |
66 | /** | |
67 | * Actual implementation of _Has_result_type, which uses SFINAE to | |
68 | * determine if the type _Tp has a publicly-accessible member type | |
69 | * result_type. | |
70 | */ | |
71 | template<typename _Tp> | |
72 | class _Has_result_type_helper : __sfinae_types | |
73 | { | |
74 | template<typename _Up> | |
75 | struct _Wrap_type | |
76 | { }; | |
77 | ||
78 | template<typename _Up> | |
79 | static __one __test(_Wrap_type<typename _Up::result_type>*); | |
80 | ||
81 | template<typename _Up> | |
82 | static __two __test(...); | |
83 | ||
84 | public: | |
85 | static const bool value = sizeof(__test<_Tp>(0)) == 1; | |
86 | }; | |
87 | ||
88 | template<typename _Tp> | |
89 | struct _Has_result_type | |
90 | : integral_constant<bool, | |
91 | _Has_result_type_helper<typename remove_cv<_Tp>::type>::value> | |
92 | { }; | |
93 | ||
94 | /** | |
95 | * | |
96 | */ | |
97 | /// If we have found a result_type, extract it. | |
98 | template<bool _Has_result_type, typename _Functor> | |
99 | struct _Maybe_get_result_type | |
100 | { }; | |
101 | ||
102 | template<typename _Functor> | |
103 | struct _Maybe_get_result_type<true, _Functor> | |
104 | { | |
105 | typedef typename _Functor::result_type result_type; | |
106 | }; | |
107 | ||
108 | /** | |
109 | * Base class for any function object that has a weak result type, as | |
110 | * defined in 3.3/3 of TR1. | |
111 | */ | |
112 | template<typename _Functor> | |
113 | struct _Weak_result_type_impl | |
114 | : _Maybe_get_result_type<_Has_result_type<_Functor>::value, _Functor> | |
115 | { | |
116 | }; | |
117 | ||
118 | /// Retrieve the result type for a function type. | |
119 | template<typename _Res, typename... _ArgTypes> | |
120 | struct _Weak_result_type_impl<_Res(_ArgTypes...)> | |
121 | { | |
122 | typedef _Res result_type; | |
123 | }; | |
124 | ||
125 | /// Retrieve the result type for a function reference. | |
126 | template<typename _Res, typename... _ArgTypes> | |
127 | struct _Weak_result_type_impl<_Res(&)(_ArgTypes...)> | |
128 | { | |
129 | typedef _Res result_type; | |
130 | }; | |
131 | ||
132 | /// Retrieve the result type for a function pointer. | |
133 | template<typename _Res, typename... _ArgTypes> | |
134 | struct _Weak_result_type_impl<_Res(*)(_ArgTypes...)> | |
135 | { | |
136 | typedef _Res result_type; | |
137 | }; | |
138 | ||
139 | /// Retrieve result type for a member function pointer. | |
140 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
141 | struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...)> | |
142 | { | |
143 | typedef _Res result_type; | |
144 | }; | |
145 | ||
146 | /// Retrieve result type for a const member function pointer. | |
147 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
148 | struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) const> | |
149 | { | |
150 | typedef _Res result_type; | |
151 | }; | |
152 | ||
153 | /// Retrieve result type for a volatile member function pointer. | |
154 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
155 | struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) volatile> | |
156 | { | |
157 | typedef _Res result_type; | |
158 | }; | |
159 | ||
160 | /// Retrieve result type for a const volatile member function pointer. | |
161 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
162 | struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...)const volatile> | |
163 | { | |
164 | typedef _Res result_type; | |
165 | }; | |
166 | ||
167 | /** | |
168 | * Strip top-level cv-qualifiers from the function object and let | |
169 | * _Weak_result_type_impl perform the real work. | |
170 | */ | |
171 | template<typename _Functor> | |
172 | struct _Weak_result_type | |
173 | : _Weak_result_type_impl<typename remove_cv<_Functor>::type> | |
174 | { | |
175 | }; | |
176 | ||
177 | template<typename _Signature> | |
178 | class result_of; | |
179 | ||
180 | /** | |
181 | * Actual implementation of result_of. When _Has_result_type is | |
182 | * true, gets its result from _Weak_result_type. Otherwise, uses | |
183 | * the function object's member template result to extract the | |
184 | * result type. | |
185 | */ | |
186 | template<bool _Has_result_type, typename _Signature> | |
187 | struct _Result_of_impl; | |
188 | ||
189 | // Handle member data pointers using _Mem_fn's logic | |
190 | template<typename _Res, typename _Class, typename _T1> | |
191 | struct _Result_of_impl<false, _Res _Class::*(_T1)> | |
192 | { | |
193 | typedef typename _Mem_fn<_Res _Class::*> | |
194 | ::template _Result_type<_T1>::type type; | |
195 | }; | |
196 | ||
197 | /** | |
198 | * Determine whether we can determine a result type from @c Functor | |
199 | * alone. | |
200 | */ | |
201 | template<typename _Functor, typename... _ArgTypes> | |
202 | class result_of<_Functor(_ArgTypes...)> | |
203 | : public _Result_of_impl< | |
204 | _Has_result_type<_Weak_result_type<_Functor> >::value, | |
205 | _Functor(_ArgTypes...)> | |
206 | { | |
207 | }; | |
208 | ||
209 | /// We already know the result type for @c Functor; use it. | |
210 | template<typename _Functor, typename... _ArgTypes> | |
211 | struct _Result_of_impl<true, _Functor(_ArgTypes...)> | |
212 | { | |
213 | typedef typename _Weak_result_type<_Functor>::result_type type; | |
214 | }; | |
215 | ||
216 | /** | |
217 | * We need to compute the result type for this invocation the hard | |
218 | * way. | |
219 | */ | |
220 | template<typename _Functor, typename... _ArgTypes> | |
221 | struct _Result_of_impl<false, _Functor(_ArgTypes...)> | |
222 | { | |
223 | typedef typename _Functor | |
224 | ::template result<_Functor(_ArgTypes...)>::type type; | |
225 | }; | |
226 | ||
227 | /** | |
228 | * It is unsafe to access ::result when there are zero arguments, so we | |
229 | * return @c void instead. | |
230 | */ | |
231 | template<typename _Functor> | |
232 | struct _Result_of_impl<false, _Functor()> | |
233 | { | |
234 | typedef void type; | |
235 | }; | |
236 | ||
237 | /// Determines if the type _Tp derives from unary_function. | |
238 | template<typename _Tp> | |
239 | struct _Derives_from_unary_function : __sfinae_types | |
240 | { | |
241 | private: | |
242 | template<typename _T1, typename _Res> | |
243 | static __one __test(const volatile unary_function<_T1, _Res>*); | |
244 | ||
245 | // It's tempting to change "..." to const volatile void*, but | |
246 | // that fails when _Tp is a function type. | |
247 | static __two __test(...); | |
248 | ||
249 | public: | |
250 | static const bool value = sizeof(__test((_Tp*)0)) == 1; | |
251 | }; | |
252 | ||
253 | /// Determines if the type _Tp derives from binary_function. | |
254 | template<typename _Tp> | |
255 | struct _Derives_from_binary_function : __sfinae_types | |
256 | { | |
257 | private: | |
258 | template<typename _T1, typename _T2, typename _Res> | |
259 | static __one __test(const volatile binary_function<_T1, _T2, _Res>*); | |
260 | ||
261 | // It's tempting to change "..." to const volatile void*, but | |
262 | // that fails when _Tp is a function type. | |
263 | static __two __test(...); | |
264 | ||
265 | public: | |
266 | static const bool value = sizeof(__test((_Tp*)0)) == 1; | |
267 | }; | |
268 | ||
269 | /// Turns a function type into a function pointer type | |
270 | template<typename _Tp, bool _IsFunctionType = is_function<_Tp>::value> | |
271 | struct _Function_to_function_pointer | |
272 | { | |
273 | typedef _Tp type; | |
274 | }; | |
275 | ||
276 | template<typename _Tp> | |
277 | struct _Function_to_function_pointer<_Tp, true> | |
278 | { | |
279 | typedef _Tp* type; | |
280 | }; | |
281 | ||
282 | /** | |
283 | * Invoke a function object, which may be either a member pointer or a | |
284 | * function object. The first parameter will tell which. | |
285 | */ | |
286 | template<typename _Functor, typename... _Args> | |
287 | inline | |
288 | typename __gnu_cxx::__enable_if< | |
289 | (!is_member_pointer<_Functor>::value | |
290 | && !is_function<_Functor>::value | |
291 | && !is_function<typename remove_pointer<_Functor>::type>::value), | |
292 | typename result_of<_Functor(_Args...)>::type | |
293 | >::__type | |
294 | __invoke(_Functor& __f, _Args&... __args) | |
295 | { | |
296 | return __f(__args...); | |
297 | } | |
298 | ||
299 | template<typename _Functor, typename... _Args> | |
300 | inline | |
301 | typename __gnu_cxx::__enable_if< | |
302 | (is_member_pointer<_Functor>::value | |
303 | && !is_function<_Functor>::value | |
304 | && !is_function<typename remove_pointer<_Functor>::type>::value), | |
305 | typename result_of<_Functor(_Args...)>::type | |
306 | >::__type | |
307 | __invoke(_Functor& __f, _Args&... __args) | |
308 | { | |
309 | return mem_fn(__f)(__args...); | |
310 | } | |
311 | ||
312 | // To pick up function references (that will become function pointers) | |
313 | template<typename _Functor, typename... _Args> | |
314 | inline | |
315 | typename __gnu_cxx::__enable_if< | |
316 | (is_pointer<_Functor>::value | |
317 | && is_function<typename remove_pointer<_Functor>::type>::value), | |
318 | typename result_of<_Functor(_Args...)>::type | |
319 | >::__type | |
320 | __invoke(_Functor __f, _Args&... __args) | |
321 | { | |
322 | return __f(__args...); | |
323 | } | |
324 | ||
325 | /** | |
326 | * Knowing which of unary_function and binary_function _Tp derives | |
327 | * from, derives from the same and ensures that reference_wrapper | |
328 | * will have a weak result type. See cases below. | |
329 | */ | |
330 | template<bool _Unary, bool _Binary, typename _Tp> | |
331 | struct _Reference_wrapper_base_impl; | |
332 | ||
333 | // Not a unary_function or binary_function, so try a weak result type. | |
334 | template<typename _Tp> | |
335 | struct _Reference_wrapper_base_impl<false, false, _Tp> | |
336 | : _Weak_result_type<_Tp> | |
337 | { }; | |
338 | ||
339 | // unary_function but not binary_function | |
340 | template<typename _Tp> | |
341 | struct _Reference_wrapper_base_impl<true, false, _Tp> | |
342 | : unary_function<typename _Tp::argument_type, | |
343 | typename _Tp::result_type> | |
344 | { }; | |
345 | ||
346 | // binary_function but not unary_function | |
347 | template<typename _Tp> | |
348 | struct _Reference_wrapper_base_impl<false, true, _Tp> | |
349 | : binary_function<typename _Tp::first_argument_type, | |
350 | typename _Tp::second_argument_type, | |
351 | typename _Tp::result_type> | |
352 | { }; | |
353 | ||
354 | // Both unary_function and binary_function. Import result_type to | |
355 | // avoid conflicts. | |
356 | template<typename _Tp> | |
357 | struct _Reference_wrapper_base_impl<true, true, _Tp> | |
358 | : unary_function<typename _Tp::argument_type, | |
359 | typename _Tp::result_type>, | |
360 | binary_function<typename _Tp::first_argument_type, | |
361 | typename _Tp::second_argument_type, | |
362 | typename _Tp::result_type> | |
363 | { | |
364 | typedef typename _Tp::result_type result_type; | |
365 | }; | |
366 | ||
367 | /** | |
368 | * Derives from unary_function or binary_function when it | |
369 | * can. Specializations handle all of the easy cases. The primary | |
370 | * template determines what to do with a class type, which may | |
371 | * derive from both unary_function and binary_function. | |
372 | */ | |
373 | template<typename _Tp> | |
374 | struct _Reference_wrapper_base | |
375 | : _Reference_wrapper_base_impl< | |
376 | _Derives_from_unary_function<_Tp>::value, | |
377 | _Derives_from_binary_function<_Tp>::value, | |
378 | _Tp> | |
379 | { }; | |
380 | ||
381 | // - a function type (unary) | |
382 | template<typename _Res, typename _T1> | |
383 | struct _Reference_wrapper_base<_Res(_T1)> | |
384 | : unary_function<_T1, _Res> | |
385 | { }; | |
386 | ||
387 | // - a function type (binary) | |
388 | template<typename _Res, typename _T1, typename _T2> | |
389 | struct _Reference_wrapper_base<_Res(_T1, _T2)> | |
390 | : binary_function<_T1, _T2, _Res> | |
391 | { }; | |
392 | ||
393 | // - a function pointer type (unary) | |
394 | template<typename _Res, typename _T1> | |
395 | struct _Reference_wrapper_base<_Res(*)(_T1)> | |
396 | : unary_function<_T1, _Res> | |
397 | { }; | |
398 | ||
399 | // - a function pointer type (binary) | |
400 | template<typename _Res, typename _T1, typename _T2> | |
401 | struct _Reference_wrapper_base<_Res(*)(_T1, _T2)> | |
402 | : binary_function<_T1, _T2, _Res> | |
403 | { }; | |
404 | ||
405 | // - a pointer to member function type (unary, no qualifiers) | |
406 | template<typename _Res, typename _T1> | |
407 | struct _Reference_wrapper_base<_Res (_T1::*)()> | |
408 | : unary_function<_T1*, _Res> | |
409 | { }; | |
410 | ||
411 | // - a pointer to member function type (binary, no qualifiers) | |
412 | template<typename _Res, typename _T1, typename _T2> | |
413 | struct _Reference_wrapper_base<_Res (_T1::*)(_T2)> | |
414 | : binary_function<_T1*, _T2, _Res> | |
415 | { }; | |
416 | ||
417 | // - a pointer to member function type (unary, const) | |
418 | template<typename _Res, typename _T1> | |
419 | struct _Reference_wrapper_base<_Res (_T1::*)() const> | |
420 | : unary_function<const _T1*, _Res> | |
421 | { }; | |
422 | ||
423 | // - a pointer to member function type (binary, const) | |
424 | template<typename _Res, typename _T1, typename _T2> | |
425 | struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const> | |
426 | : binary_function<const _T1*, _T2, _Res> | |
427 | { }; | |
428 | ||
429 | // - a pointer to member function type (unary, volatile) | |
430 | template<typename _Res, typename _T1> | |
431 | struct _Reference_wrapper_base<_Res (_T1::*)() volatile> | |
432 | : unary_function<volatile _T1*, _Res> | |
433 | { }; | |
434 | ||
435 | // - a pointer to member function type (binary, volatile) | |
436 | template<typename _Res, typename _T1, typename _T2> | |
437 | struct _Reference_wrapper_base<_Res (_T1::*)(_T2) volatile> | |
438 | : binary_function<volatile _T1*, _T2, _Res> | |
439 | { }; | |
440 | ||
441 | // - a pointer to member function type (unary, const volatile) | |
442 | template<typename _Res, typename _T1> | |
443 | struct _Reference_wrapper_base<_Res (_T1::*)() const volatile> | |
444 | : unary_function<const volatile _T1*, _Res> | |
445 | { }; | |
446 | ||
447 | // - a pointer to member function type (binary, const volatile) | |
448 | template<typename _Res, typename _T1, typename _T2> | |
449 | struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const volatile> | |
450 | : binary_function<const volatile _T1*, _T2, _Res> | |
451 | { }; | |
452 | ||
453 | /// reference_wrapper | |
454 | template<typename _Tp> | |
455 | class reference_wrapper | |
456 | : public _Reference_wrapper_base<typename remove_cv<_Tp>::type> | |
457 | { | |
458 | // If _Tp is a function type, we can't form result_of<_Tp(...)>, | |
459 | // so turn it into a function pointer type. | |
460 | typedef typename _Function_to_function_pointer<_Tp>::type | |
461 | _M_func_type; | |
462 | ||
463 | _Tp* _M_data; | |
464 | public: | |
465 | typedef _Tp type; | |
466 | ||
467 | explicit | |
f271b536 PC |
468 | reference_wrapper(_Tp& __indata) |
469 | : _M_data(std::__addressof(__indata)) | |
7aec2c63 PC |
470 | { } |
471 | ||
472 | reference_wrapper(const reference_wrapper<_Tp>& __inref): | |
473 | _M_data(__inref._M_data) | |
474 | { } | |
475 | ||
476 | reference_wrapper& | |
477 | operator=(const reference_wrapper<_Tp>& __inref) | |
478 | { | |
479 | _M_data = __inref._M_data; | |
480 | return *this; | |
481 | } | |
482 | ||
483 | operator _Tp&() const | |
484 | { return this->get(); } | |
485 | ||
486 | _Tp& | |
487 | get() const | |
488 | { return *_M_data; } | |
489 | ||
490 | template<typename... _Args> | |
491 | typename result_of<_M_func_type(_Args...)>::type | |
492 | operator()(_Args&... __args) const | |
493 | { | |
494 | return __invoke(get(), __args...); | |
495 | } | |
496 | }; | |
497 | ||
498 | ||
499 | // Denotes a reference should be taken to a variable. | |
500 | template<typename _Tp> | |
501 | inline reference_wrapper<_Tp> | |
502 | ref(_Tp& __t) | |
503 | { return reference_wrapper<_Tp>(__t); } | |
504 | ||
505 | // Denotes a const reference should be taken to a variable. | |
506 | template<typename _Tp> | |
507 | inline reference_wrapper<const _Tp> | |
508 | cref(const _Tp& __t) | |
509 | { return reference_wrapper<const _Tp>(__t); } | |
510 | ||
511 | template<typename _Tp> | |
512 | inline reference_wrapper<_Tp> | |
513 | ref(reference_wrapper<_Tp> __t) | |
514 | { return ref(__t.get()); } | |
515 | ||
516 | template<typename _Tp> | |
517 | inline reference_wrapper<const _Tp> | |
518 | cref(reference_wrapper<_Tp> __t) | |
519 | { return cref(__t.get()); } | |
520 | ||
521 | template<typename _Tp, bool> | |
522 | struct _Mem_fn_const_or_non | |
523 | { | |
524 | typedef const _Tp& type; | |
525 | }; | |
526 | ||
527 | template<typename _Tp> | |
528 | struct _Mem_fn_const_or_non<_Tp, false> | |
529 | { | |
530 | typedef _Tp& type; | |
531 | }; | |
532 | ||
533 | /** | |
534 | * Derives from @c unary_function or @c binary_function, or perhaps | |
535 | * nothing, depending on the number of arguments provided. The | |
536 | * primary template is the basis case, which derives nothing. | |
537 | */ | |
538 | template<typename _Res, typename... _ArgTypes> | |
539 | struct _Maybe_unary_or_binary_function { }; | |
540 | ||
541 | /// Derives from @c unary_function, as appropriate. | |
542 | template<typename _Res, typename _T1> | |
543 | struct _Maybe_unary_or_binary_function<_Res, _T1> | |
544 | : std::unary_function<_T1, _Res> { }; | |
545 | ||
546 | /// Derives from @c binary_function, as appropriate. | |
547 | template<typename _Res, typename _T1, typename _T2> | |
548 | struct _Maybe_unary_or_binary_function<_Res, _T1, _T2> | |
549 | : std::binary_function<_T1, _T2, _Res> { }; | |
550 | ||
551 | /// Implementation of @c mem_fn for member function pointers. | |
552 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
553 | class _Mem_fn<_Res (_Class::*)(_ArgTypes...)> | |
554 | : public _Maybe_unary_or_binary_function<_Res, _Class*, _ArgTypes...> | |
555 | { | |
556 | typedef _Res (_Class::*_Functor)(_ArgTypes...); | |
557 | ||
558 | template<typename _Tp> | |
559 | _Res | |
560 | _M_call(_Tp& __object, const volatile _Class *, | |
561 | _ArgTypes... __args) const | |
562 | { return (__object.*__pmf)(__args...); } | |
563 | ||
564 | template<typename _Tp> | |
565 | _Res | |
566 | _M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const | |
567 | { return ((*__ptr).*__pmf)(__args...); } | |
568 | ||
569 | public: | |
570 | typedef _Res result_type; | |
571 | ||
572 | explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { } | |
573 | ||
574 | // Handle objects | |
575 | _Res | |
576 | operator()(_Class& __object, _ArgTypes... __args) const | |
577 | { return (__object.*__pmf)(__args...); } | |
578 | ||
579 | // Handle pointers | |
580 | _Res | |
581 | operator()(_Class* __object, _ArgTypes... __args) const | |
582 | { return (__object->*__pmf)(__args...); } | |
583 | ||
584 | // Handle smart pointers, references and pointers to derived | |
585 | template<typename _Tp> | |
586 | _Res | |
587 | operator()(_Tp& __object, _ArgTypes... __args) const | |
588 | { return _M_call(__object, &__object, __args...); } | |
589 | ||
590 | private: | |
591 | _Functor __pmf; | |
592 | }; | |
593 | ||
594 | /// Implementation of @c mem_fn for const member function pointers. | |
595 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
596 | class _Mem_fn<_Res (_Class::*)(_ArgTypes...) const> | |
597 | : public _Maybe_unary_or_binary_function<_Res, const _Class*, | |
598 | _ArgTypes...> | |
599 | { | |
600 | typedef _Res (_Class::*_Functor)(_ArgTypes...) const; | |
601 | ||
602 | template<typename _Tp> | |
603 | _Res | |
604 | _M_call(_Tp& __object, const volatile _Class *, | |
605 | _ArgTypes... __args) const | |
606 | { return (__object.*__pmf)(__args...); } | |
607 | ||
608 | template<typename _Tp> | |
609 | _Res | |
610 | _M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const | |
611 | { return ((*__ptr).*__pmf)(__args...); } | |
612 | ||
613 | public: | |
614 | typedef _Res result_type; | |
615 | ||
616 | explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { } | |
617 | ||
618 | // Handle objects | |
619 | _Res | |
620 | operator()(const _Class& __object, _ArgTypes... __args) const | |
621 | { return (__object.*__pmf)(__args...); } | |
622 | ||
623 | // Handle pointers | |
624 | _Res | |
625 | operator()(const _Class* __object, _ArgTypes... __args) const | |
626 | { return (__object->*__pmf)(__args...); } | |
627 | ||
628 | // Handle smart pointers, references and pointers to derived | |
629 | template<typename _Tp> | |
630 | _Res operator()(_Tp& __object, _ArgTypes... __args) const | |
631 | { return _M_call(__object, &__object, __args...); } | |
632 | ||
633 | private: | |
634 | _Functor __pmf; | |
635 | }; | |
636 | ||
637 | /// Implementation of @c mem_fn for volatile member function pointers. | |
638 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
639 | class _Mem_fn<_Res (_Class::*)(_ArgTypes...) volatile> | |
640 | : public _Maybe_unary_or_binary_function<_Res, volatile _Class*, | |
641 | _ArgTypes...> | |
642 | { | |
643 | typedef _Res (_Class::*_Functor)(_ArgTypes...) volatile; | |
644 | ||
645 | template<typename _Tp> | |
646 | _Res | |
647 | _M_call(_Tp& __object, const volatile _Class *, | |
648 | _ArgTypes... __args) const | |
649 | { return (__object.*__pmf)(__args...); } | |
650 | ||
651 | template<typename _Tp> | |
652 | _Res | |
653 | _M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const | |
654 | { return ((*__ptr).*__pmf)(__args...); } | |
655 | ||
656 | public: | |
657 | typedef _Res result_type; | |
658 | ||
659 | explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { } | |
660 | ||
661 | // Handle objects | |
662 | _Res | |
663 | operator()(volatile _Class& __object, _ArgTypes... __args) const | |
664 | { return (__object.*__pmf)(__args...); } | |
665 | ||
666 | // Handle pointers | |
667 | _Res | |
668 | operator()(volatile _Class* __object, _ArgTypes... __args) const | |
669 | { return (__object->*__pmf)(__args...); } | |
670 | ||
671 | // Handle smart pointers, references and pointers to derived | |
672 | template<typename _Tp> | |
673 | _Res | |
674 | operator()(_Tp& __object, _ArgTypes... __args) const | |
675 | { return _M_call(__object, &__object, __args...); } | |
676 | ||
677 | private: | |
678 | _Functor __pmf; | |
679 | }; | |
680 | ||
681 | /// Implementation of @c mem_fn for const volatile member function pointers. | |
682 | template<typename _Res, typename _Class, typename... _ArgTypes> | |
683 | class _Mem_fn<_Res (_Class::*)(_ArgTypes...) const volatile> | |
684 | : public _Maybe_unary_or_binary_function<_Res, const volatile _Class*, | |
685 | _ArgTypes...> | |
686 | { | |
687 | typedef _Res (_Class::*_Functor)(_ArgTypes...) const volatile; | |
688 | ||
689 | template<typename _Tp> | |
690 | _Res | |
691 | _M_call(_Tp& __object, const volatile _Class *, | |
692 | _ArgTypes... __args) const | |
693 | { return (__object.*__pmf)(__args...); } | |
694 | ||
695 | template<typename _Tp> | |
696 | _Res | |
697 | _M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const | |
698 | { return ((*__ptr).*__pmf)(__args...); } | |
699 | ||
700 | public: | |
701 | typedef _Res result_type; | |
702 | ||
703 | explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { } | |
704 | ||
705 | // Handle objects | |
706 | _Res | |
707 | operator()(const volatile _Class& __object, _ArgTypes... __args) const | |
708 | { return (__object.*__pmf)(__args...); } | |
709 | ||
710 | // Handle pointers | |
711 | _Res | |
712 | operator()(const volatile _Class* __object, _ArgTypes... __args) const | |
713 | { return (__object->*__pmf)(__args...); } | |
714 | ||
715 | // Handle smart pointers, references and pointers to derived | |
716 | template<typename _Tp> | |
717 | _Res operator()(_Tp& __object, _ArgTypes... __args) const | |
718 | { return _M_call(__object, &__object, __args...); } | |
719 | ||
720 | private: | |
721 | _Functor __pmf; | |
722 | }; | |
723 | ||
724 | ||
725 | template<typename _Res, typename _Class> | |
726 | class _Mem_fn<_Res _Class::*> | |
727 | { | |
728 | // This bit of genius is due to Peter Dimov, improved slightly by | |
729 | // Douglas Gregor. | |
730 | template<typename _Tp> | |
731 | _Res& | |
732 | _M_call(_Tp& __object, _Class *) const | |
733 | { return __object.*__pm; } | |
734 | ||
735 | template<typename _Tp, typename _Up> | |
736 | _Res& | |
737 | _M_call(_Tp& __object, _Up * const *) const | |
738 | { return (*__object).*__pm; } | |
739 | ||
740 | template<typename _Tp, typename _Up> | |
741 | const _Res& | |
742 | _M_call(_Tp& __object, const _Up * const *) const | |
743 | { return (*__object).*__pm; } | |
744 | ||
745 | template<typename _Tp> | |
746 | const _Res& | |
747 | _M_call(_Tp& __object, const _Class *) const | |
748 | { return __object.*__pm; } | |
749 | ||
750 | template<typename _Tp> | |
751 | const _Res& | |
752 | _M_call(_Tp& __ptr, const volatile void*) const | |
753 | { return (*__ptr).*__pm; } | |
754 | ||
755 | template<typename _Tp> static _Tp& __get_ref(); | |
756 | ||
757 | template<typename _Tp> | |
758 | static __sfinae_types::__one __check_const(_Tp&, _Class*); | |
759 | template<typename _Tp, typename _Up> | |
760 | static __sfinae_types::__one __check_const(_Tp&, _Up * const *); | |
761 | template<typename _Tp, typename _Up> | |
762 | static __sfinae_types::__two __check_const(_Tp&, const _Up * const *); | |
763 | template<typename _Tp> | |
764 | static __sfinae_types::__two __check_const(_Tp&, const _Class*); | |
765 | template<typename _Tp> | |
766 | static __sfinae_types::__two __check_const(_Tp&, const volatile void*); | |
767 | ||
768 | public: | |
769 | template<typename _Tp> | |
770 | struct _Result_type | |
771 | : _Mem_fn_const_or_non<_Res, | |
772 | (sizeof(__sfinae_types::__two) | |
773 | == sizeof(__check_const<_Tp>(__get_ref<_Tp>(), (_Tp*)0)))> | |
774 | { }; | |
775 | ||
776 | template<typename _Signature> | |
777 | struct result; | |
778 | ||
779 | template<typename _CVMem, typename _Tp> | |
780 | struct result<_CVMem(_Tp)> | |
781 | : public _Result_type<_Tp> { }; | |
782 | ||
783 | template<typename _CVMem, typename _Tp> | |
784 | struct result<_CVMem(_Tp&)> | |
785 | : public _Result_type<_Tp> { }; | |
786 | ||
787 | explicit | |
788 | _Mem_fn(_Res _Class::*__pm) : __pm(__pm) { } | |
789 | ||
790 | // Handle objects | |
791 | _Res& | |
792 | operator()(_Class& __object) const | |
793 | { return __object.*__pm; } | |
794 | ||
795 | const _Res& | |
796 | operator()(const _Class& __object) const | |
797 | { return __object.*__pm; } | |
798 | ||
799 | // Handle pointers | |
800 | _Res& | |
801 | operator()(_Class* __object) const | |
802 | { return __object->*__pm; } | |
803 | ||
804 | const _Res& | |
805 | operator()(const _Class* __object) const | |
806 | { return __object->*__pm; } | |
807 | ||
808 | // Handle smart pointers and derived | |
809 | template<typename _Tp> | |
810 | typename _Result_type<_Tp>::type | |
811 | operator()(_Tp& __unknown) const | |
812 | { return _M_call(__unknown, &__unknown); } | |
813 | ||
814 | private: | |
815 | _Res _Class::*__pm; | |
816 | }; | |
817 | ||
818 | /** | |
819 | * @brief Returns a function object that forwards to the member | |
820 | * pointer @a pm. | |
821 | */ | |
822 | template<typename _Tp, typename _Class> | |
823 | inline _Mem_fn<_Tp _Class::*> | |
824 | mem_fn(_Tp _Class::* __pm) | |
825 | { | |
826 | return _Mem_fn<_Tp _Class::*>(__pm); | |
827 | } | |
828 | ||
829 | /** | |
830 | * @brief Determines if the given type _Tp is a function object | |
831 | * should be treated as a subexpression when evaluating calls to | |
832 | * function objects returned by bind(). [TR1 3.6.1] | |
833 | */ | |
834 | template<typename _Tp> | |
835 | struct is_bind_expression | |
836 | { static const bool value = false; }; | |
837 | ||
838 | template<typename _Tp> | |
839 | const bool is_bind_expression<_Tp>::value; | |
840 | ||
841 | /** | |
842 | * @brief Determines if the given type _Tp is a placeholder in a | |
843 | * bind() expression and, if so, which placeholder it is. [TR1 3.6.2] | |
844 | */ | |
845 | template<typename _Tp> | |
846 | struct is_placeholder | |
847 | { static const int value = 0; }; | |
848 | ||
849 | template<typename _Tp> | |
850 | const int is_placeholder<_Tp>::value; | |
851 | ||
852 | /// The type of placeholder objects defined by libstdc++. | |
853 | template<int _Num> struct _Placeholder { }; | |
854 | ||
e02a5443 JW |
855 | /** @namespace std::tr1::placeholders |
856 | * @brief Sub-namespace for tr1/functional. | |
7aec2c63 PC |
857 | */ |
858 | namespace placeholders | |
859 | { | |
e02a5443 JW |
860 | /* Define a large number of placeholders. There is no way to |
861 | * simplify this with variadic templates, because we're introducing | |
862 | * unique names for each. | |
863 | */ | |
7aec2c63 PC |
864 | namespace |
865 | { | |
866 | _Placeholder<1> _1; | |
867 | _Placeholder<2> _2; | |
868 | _Placeholder<3> _3; | |
869 | _Placeholder<4> _4; | |
870 | _Placeholder<5> _5; | |
871 | _Placeholder<6> _6; | |
872 | _Placeholder<7> _7; | |
873 | _Placeholder<8> _8; | |
874 | _Placeholder<9> _9; | |
875 | _Placeholder<10> _10; | |
876 | _Placeholder<11> _11; | |
877 | _Placeholder<12> _12; | |
878 | _Placeholder<13> _13; | |
879 | _Placeholder<14> _14; | |
880 | _Placeholder<15> _15; | |
881 | _Placeholder<16> _16; | |
882 | _Placeholder<17> _17; | |
883 | _Placeholder<18> _18; | |
884 | _Placeholder<19> _19; | |
885 | _Placeholder<20> _20; | |
886 | _Placeholder<21> _21; | |
887 | _Placeholder<22> _22; | |
888 | _Placeholder<23> _23; | |
889 | _Placeholder<24> _24; | |
890 | _Placeholder<25> _25; | |
891 | _Placeholder<26> _26; | |
892 | _Placeholder<27> _27; | |
893 | _Placeholder<28> _28; | |
894 | _Placeholder<29> _29; | |
895 | } | |
896 | } | |
897 | ||
898 | /** | |
899 | * Partial specialization of is_placeholder that provides the placeholder | |
900 | * number for the placeholder objects defined by libstdc++. | |
901 | */ | |
902 | template<int _Num> | |
903 | struct is_placeholder<_Placeholder<_Num> > | |
904 | { static const int value = _Num; }; | |
905 | ||
906 | template<int _Num> | |
907 | const int is_placeholder<_Placeholder<_Num> >::value; | |
908 | ||
734f5023 | 909 | #if __cplusplus >= 201103L |
e02a5443 JW |
910 | template<int _Num> |
911 | struct is_placeholder<std::_Placeholder<_Num>> | |
912 | : std::integral_constant<int, _Num> | |
913 | { }; | |
914 | ||
915 | template<int _Num> | |
916 | struct is_placeholder<const std::_Placeholder<_Num>> | |
917 | : std::integral_constant<int, _Num> | |
918 | { }; | |
919 | #endif | |
920 | ||
7aec2c63 PC |
921 | /** |
922 | * Stores a tuple of indices. Used by bind() to extract the elements | |
923 | * in a tuple. | |
924 | */ | |
925 | template<int... _Indexes> | |
926 | struct _Index_tuple { }; | |
927 | ||
928 | /// Builds an _Index_tuple<0, 1, 2, ..., _Num-1>. | |
929 | template<std::size_t _Num, typename _Tuple = _Index_tuple<> > | |
930 | struct _Build_index_tuple; | |
931 | ||
932 | template<std::size_t _Num, int... _Indexes> | |
933 | struct _Build_index_tuple<_Num, _Index_tuple<_Indexes...> > | |
934 | : _Build_index_tuple<_Num - 1, | |
935 | _Index_tuple<_Indexes..., sizeof...(_Indexes)> > | |
936 | { | |
937 | }; | |
938 | ||
939 | template<int... _Indexes> | |
940 | struct _Build_index_tuple<0, _Index_tuple<_Indexes...> > | |
941 | { | |
942 | typedef _Index_tuple<_Indexes...> __type; | |
943 | }; | |
944 | ||
945 | /** | |
946 | * Used by _Safe_tuple_element to indicate that there is no tuple | |
947 | * element at this position. | |
948 | */ | |
949 | struct _No_tuple_element; | |
950 | ||
951 | /** | |
952 | * Implementation helper for _Safe_tuple_element. This primary | |
953 | * template handles the case where it is safe to use @c | |
954 | * tuple_element. | |
955 | */ | |
956 | template<int __i, typename _Tuple, bool _IsSafe> | |
957 | struct _Safe_tuple_element_impl | |
958 | : tuple_element<__i, _Tuple> { }; | |
959 | ||
960 | /** | |
961 | * Implementation helper for _Safe_tuple_element. This partial | |
962 | * specialization handles the case where it is not safe to use @c | |
963 | * tuple_element. We just return @c _No_tuple_element. | |
964 | */ | |
965 | template<int __i, typename _Tuple> | |
966 | struct _Safe_tuple_element_impl<__i, _Tuple, false> | |
967 | { | |
968 | typedef _No_tuple_element type; | |
969 | }; | |
970 | ||
971 | /** | |
972 | * Like tuple_element, but returns @c _No_tuple_element when | |
973 | * tuple_element would return an error. | |
974 | */ | |
975 | template<int __i, typename _Tuple> | |
976 | struct _Safe_tuple_element | |
977 | : _Safe_tuple_element_impl<__i, _Tuple, | |
978 | (__i >= 0 && __i < tuple_size<_Tuple>::value)> | |
979 | { | |
980 | }; | |
981 | ||
982 | /** | |
983 | * Maps an argument to bind() into an actual argument to the bound | |
984 | * function object [TR1 3.6.3/5]. Only the first parameter should | |
985 | * be specified: the rest are used to determine among the various | |
986 | * implementations. Note that, although this class is a function | |
987 | * object, it isn't entirely normal because it takes only two | |
988 | * parameters regardless of the number of parameters passed to the | |
989 | * bind expression. The first parameter is the bound argument and | |
990 | * the second parameter is a tuple containing references to the | |
991 | * rest of the arguments. | |
992 | */ | |
993 | template<typename _Arg, | |
994 | bool _IsBindExp = is_bind_expression<_Arg>::value, | |
995 | bool _IsPlaceholder = (is_placeholder<_Arg>::value > 0)> | |
996 | class _Mu; | |
997 | ||
998 | /** | |
999 | * If the argument is reference_wrapper<_Tp>, returns the | |
1000 | * underlying reference. [TR1 3.6.3/5 bullet 1] | |
1001 | */ | |
1002 | template<typename _Tp> | |
1003 | class _Mu<reference_wrapper<_Tp>, false, false> | |
1004 | { | |
1005 | public: | |
1006 | typedef _Tp& result_type; | |
1007 | ||
1008 | /* Note: This won't actually work for const volatile | |
1009 | * reference_wrappers, because reference_wrapper::get() is const | |
1010 | * but not volatile-qualified. This might be a defect in the TR. | |
1011 | */ | |
1012 | template<typename _CVRef, typename _Tuple> | |
1013 | result_type | |
1014 | operator()(_CVRef& __arg, const _Tuple&) const volatile | |
1015 | { return __arg.get(); } | |
1016 | }; | |
1017 | ||
1018 | /** | |
1019 | * If the argument is a bind expression, we invoke the underlying | |
1020 | * function object with the same cv-qualifiers as we are given and | |
1021 | * pass along all of our arguments (unwrapped). [TR1 3.6.3/5 bullet 2] | |
1022 | */ | |
1023 | template<typename _Arg> | |
1024 | class _Mu<_Arg, true, false> | |
1025 | { | |
1026 | public: | |
1027 | template<typename _Signature> class result; | |
1028 | ||
1029 | // Determine the result type when we pass the arguments along. This | |
1030 | // involves passing along the cv-qualifiers placed on _Mu and | |
1031 | // unwrapping the argument bundle. | |
1032 | template<typename _CVMu, typename _CVArg, typename... _Args> | |
1033 | class result<_CVMu(_CVArg, tuple<_Args...>)> | |
1034 | : public result_of<_CVArg(_Args...)> { }; | |
1035 | ||
1036 | template<typename _CVArg, typename... _Args> | |
1037 | typename result_of<_CVArg(_Args...)>::type | |
1038 | operator()(_CVArg& __arg, | |
1039 | const tuple<_Args...>& __tuple) const volatile | |
1040 | { | |
1041 | // Construct an index tuple and forward to __call | |
1042 | typedef typename _Build_index_tuple<sizeof...(_Args)>::__type | |
1043 | _Indexes; | |
1044 | return this->__call(__arg, __tuple, _Indexes()); | |
1045 | } | |
1046 | ||
1047 | private: | |
1048 | // Invokes the underlying function object __arg by unpacking all | |
1049 | // of the arguments in the tuple. | |
1050 | template<typename _CVArg, typename... _Args, int... _Indexes> | |
1051 | typename result_of<_CVArg(_Args...)>::type | |
1052 | __call(_CVArg& __arg, const tuple<_Args...>& __tuple, | |
1053 | const _Index_tuple<_Indexes...>&) const volatile | |
1054 | { | |
1055 | return __arg(tr1::get<_Indexes>(__tuple)...); | |
1056 | } | |
1057 | }; | |
1058 | ||
1059 | /** | |
1060 | * If the argument is a placeholder for the Nth argument, returns | |
1061 | * a reference to the Nth argument to the bind function object. | |
1062 | * [TR1 3.6.3/5 bullet 3] | |
1063 | */ | |
1064 | template<typename _Arg> | |
1065 | class _Mu<_Arg, false, true> | |
1066 | { | |
1067 | public: | |
1068 | template<typename _Signature> class result; | |
1069 | ||
1070 | template<typename _CVMu, typename _CVArg, typename _Tuple> | |
1071 | class result<_CVMu(_CVArg, _Tuple)> | |
1072 | { | |
1073 | // Add a reference, if it hasn't already been done for us. | |
1074 | // This allows us to be a little bit sloppy in constructing | |
1075 | // the tuple that we pass to result_of<...>. | |
1076 | typedef typename _Safe_tuple_element<(is_placeholder<_Arg>::value | |
1077 | - 1), _Tuple>::type | |
1078 | __base_type; | |
1079 | ||
1080 | public: | |
1081 | typedef typename add_reference<__base_type>::type type; | |
1082 | }; | |
1083 | ||
1084 | template<typename _Tuple> | |
1085 | typename result<_Mu(_Arg, _Tuple)>::type | |
1086 | operator()(const volatile _Arg&, const _Tuple& __tuple) const volatile | |
1087 | { | |
1088 | return ::std::tr1::get<(is_placeholder<_Arg>::value - 1)>(__tuple); | |
1089 | } | |
1090 | }; | |
1091 | ||
1092 | /** | |
1093 | * If the argument is just a value, returns a reference to that | |
1094 | * value. The cv-qualifiers on the reference are the same as the | |
1095 | * cv-qualifiers on the _Mu object. [TR1 3.6.3/5 bullet 4] | |
1096 | */ | |
1097 | template<typename _Arg> | |
1098 | class _Mu<_Arg, false, false> | |
1099 | { | |
1100 | public: | |
1101 | template<typename _Signature> struct result; | |
1102 | ||
1103 | template<typename _CVMu, typename _CVArg, typename _Tuple> | |
1104 | struct result<_CVMu(_CVArg, _Tuple)> | |
1105 | { | |
1106 | typedef typename add_reference<_CVArg>::type type; | |
1107 | }; | |
1108 | ||
1109 | // Pick up the cv-qualifiers of the argument | |
1110 | template<typename _CVArg, typename _Tuple> | |
1111 | _CVArg& | |
1112 | operator()(_CVArg& __arg, const _Tuple&) const volatile | |
1113 | { return __arg; } | |
1114 | }; | |
1115 | ||
1116 | /** | |
1117 | * Maps member pointers into instances of _Mem_fn but leaves all | |
1118 | * other function objects untouched. Used by tr1::bind(). The | |
1119 | * primary template handles the non--member-pointer case. | |
1120 | */ | |
1121 | template<typename _Tp> | |
1122 | struct _Maybe_wrap_member_pointer | |
1123 | { | |
1124 | typedef _Tp type; | |
1125 | ||
1126 | static const _Tp& | |
1127 | __do_wrap(const _Tp& __x) | |
1128 | { return __x; } | |
1129 | }; | |
1130 | ||
1131 | /** | |
1132 | * Maps member pointers into instances of _Mem_fn but leaves all | |
1133 | * other function objects untouched. Used by tr1::bind(). This | |
1134 | * partial specialization handles the member pointer case. | |
1135 | */ | |
1136 | template<typename _Tp, typename _Class> | |
1137 | struct _Maybe_wrap_member_pointer<_Tp _Class::*> | |
1138 | { | |
1139 | typedef _Mem_fn<_Tp _Class::*> type; | |
1140 | ||
1141 | static type | |
1142 | __do_wrap(_Tp _Class::* __pm) | |
1143 | { return type(__pm); } | |
1144 | }; | |
1145 | ||
1146 | /// Type of the function object returned from bind(). | |
1147 | template<typename _Signature> | |
1148 | struct _Bind; | |
1149 | ||
1150 | template<typename _Functor, typename... _Bound_args> | |
1151 | class _Bind<_Functor(_Bound_args...)> | |
1152 | : public _Weak_result_type<_Functor> | |
1153 | { | |
1154 | typedef _Bind __self_type; | |
1155 | typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type | |
1156 | _Bound_indexes; | |
1157 | ||
1158 | _Functor _M_f; | |
1159 | tuple<_Bound_args...> _M_bound_args; | |
1160 | ||
1161 | // Call unqualified | |
1162 | template<typename... _Args, int... _Indexes> | |
1163 | typename result_of< | |
1164 | _Functor(typename result_of<_Mu<_Bound_args> | |
1165 | (_Bound_args, tuple<_Args...>)>::type...) | |
1166 | >::type | |
1167 | __call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) | |
1168 | { | |
1169 | return _M_f(_Mu<_Bound_args>() | |
1170 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1171 | } | |
1172 | ||
1173 | // Call as const | |
1174 | template<typename... _Args, int... _Indexes> | |
1175 | typename result_of< | |
1176 | const _Functor(typename result_of<_Mu<_Bound_args> | |
1177 | (const _Bound_args, tuple<_Args...>) | |
1178 | >::type...)>::type | |
1179 | __call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) const | |
1180 | { | |
1181 | return _M_f(_Mu<_Bound_args>() | |
1182 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1183 | } | |
1184 | ||
1185 | // Call as volatile | |
1186 | template<typename... _Args, int... _Indexes> | |
1187 | typename result_of< | |
1188 | volatile _Functor(typename result_of<_Mu<_Bound_args> | |
1189 | (volatile _Bound_args, tuple<_Args...>) | |
1190 | >::type...)>::type | |
1191 | __call(const tuple<_Args...>& __args, | |
1192 | _Index_tuple<_Indexes...>) volatile | |
1193 | { | |
1194 | return _M_f(_Mu<_Bound_args>() | |
1195 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1196 | } | |
1197 | ||
1198 | // Call as const volatile | |
1199 | template<typename... _Args, int... _Indexes> | |
1200 | typename result_of< | |
1201 | const volatile _Functor(typename result_of<_Mu<_Bound_args> | |
1202 | (const volatile _Bound_args, | |
1203 | tuple<_Args...>) | |
1204 | >::type...)>::type | |
1205 | __call(const tuple<_Args...>& __args, | |
1206 | _Index_tuple<_Indexes...>) const volatile | |
1207 | { | |
1208 | return _M_f(_Mu<_Bound_args>() | |
1209 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1210 | } | |
1211 | ||
1212 | public: | |
1213 | explicit _Bind(_Functor __f, _Bound_args... __bound_args) | |
1214 | : _M_f(__f), _M_bound_args(__bound_args...) { } | |
1215 | ||
1216 | // Call unqualified | |
1217 | template<typename... _Args> | |
1218 | typename result_of< | |
1219 | _Functor(typename result_of<_Mu<_Bound_args> | |
1220 | (_Bound_args, tuple<_Args...>)>::type...) | |
1221 | >::type | |
1222 | operator()(_Args&... __args) | |
1223 | { | |
1224 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1225 | } | |
1226 | ||
1227 | // Call as const | |
1228 | template<typename... _Args> | |
1229 | typename result_of< | |
1230 | const _Functor(typename result_of<_Mu<_Bound_args> | |
1231 | (const _Bound_args, tuple<_Args...>)>::type...) | |
1232 | >::type | |
1233 | operator()(_Args&... __args) const | |
1234 | { | |
1235 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1236 | } | |
1237 | ||
1238 | ||
1239 | // Call as volatile | |
1240 | template<typename... _Args> | |
1241 | typename result_of< | |
1242 | volatile _Functor(typename result_of<_Mu<_Bound_args> | |
1243 | (volatile _Bound_args, tuple<_Args...>)>::type...) | |
1244 | >::type | |
1245 | operator()(_Args&... __args) volatile | |
1246 | { | |
1247 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1248 | } | |
1249 | ||
1250 | ||
1251 | // Call as const volatile | |
1252 | template<typename... _Args> | |
1253 | typename result_of< | |
1254 | const volatile _Functor(typename result_of<_Mu<_Bound_args> | |
1255 | (const volatile _Bound_args, | |
1256 | tuple<_Args...>)>::type...) | |
1257 | >::type | |
1258 | operator()(_Args&... __args) const volatile | |
1259 | { | |
1260 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1261 | } | |
1262 | }; | |
1263 | ||
1264 | /// Type of the function object returned from bind<R>(). | |
1265 | template<typename _Result, typename _Signature> | |
1266 | struct _Bind_result; | |
1267 | ||
1268 | template<typename _Result, typename _Functor, typename... _Bound_args> | |
1269 | class _Bind_result<_Result, _Functor(_Bound_args...)> | |
1270 | { | |
1271 | typedef _Bind_result __self_type; | |
1272 | typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type | |
1273 | _Bound_indexes; | |
1274 | ||
1275 | _Functor _M_f; | |
1276 | tuple<_Bound_args...> _M_bound_args; | |
1277 | ||
1278 | // Call unqualified | |
1279 | template<typename... _Args, int... _Indexes> | |
1280 | _Result | |
1281 | __call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) | |
1282 | { | |
1283 | return _M_f(_Mu<_Bound_args>() | |
1284 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1285 | } | |
1286 | ||
1287 | // Call as const | |
1288 | template<typename... _Args, int... _Indexes> | |
1289 | _Result | |
1290 | __call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) const | |
1291 | { | |
1292 | return _M_f(_Mu<_Bound_args>() | |
1293 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1294 | } | |
1295 | ||
1296 | // Call as volatile | |
1297 | template<typename... _Args, int... _Indexes> | |
1298 | _Result | |
1299 | __call(const tuple<_Args...>& __args, | |
1300 | _Index_tuple<_Indexes...>) volatile | |
1301 | { | |
1302 | return _M_f(_Mu<_Bound_args>() | |
1303 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1304 | } | |
1305 | ||
1306 | // Call as const volatile | |
1307 | template<typename... _Args, int... _Indexes> | |
1308 | _Result | |
1309 | __call(const tuple<_Args...>& __args, | |
1310 | _Index_tuple<_Indexes...>) const volatile | |
1311 | { | |
1312 | return _M_f(_Mu<_Bound_args>() | |
1313 | (tr1::get<_Indexes>(_M_bound_args), __args)...); | |
1314 | } | |
1315 | ||
1316 | public: | |
1317 | typedef _Result result_type; | |
1318 | ||
1319 | explicit | |
1320 | _Bind_result(_Functor __f, _Bound_args... __bound_args) | |
1321 | : _M_f(__f), _M_bound_args(__bound_args...) { } | |
1322 | ||
1323 | // Call unqualified | |
1324 | template<typename... _Args> | |
1325 | result_type | |
1326 | operator()(_Args&... __args) | |
1327 | { | |
1328 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1329 | } | |
1330 | ||
1331 | // Call as const | |
1332 | template<typename... _Args> | |
1333 | result_type | |
1334 | operator()(_Args&... __args) const | |
1335 | { | |
1336 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1337 | } | |
1338 | ||
1339 | // Call as volatile | |
1340 | template<typename... _Args> | |
1341 | result_type | |
1342 | operator()(_Args&... __args) volatile | |
1343 | { | |
1344 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1345 | } | |
1346 | ||
1347 | // Call as const volatile | |
1348 | template<typename... _Args> | |
1349 | result_type | |
1350 | operator()(_Args&... __args) const volatile | |
1351 | { | |
1352 | return this->__call(tr1::tie(__args...), _Bound_indexes()); | |
1353 | } | |
1354 | }; | |
1355 | ||
1356 | /// Class template _Bind is always a bind expression. | |
1357 | template<typename _Signature> | |
1358 | struct is_bind_expression<_Bind<_Signature> > | |
1359 | { static const bool value = true; }; | |
1360 | ||
1361 | template<typename _Signature> | |
1362 | const bool is_bind_expression<_Bind<_Signature> >::value; | |
1363 | ||
e02a5443 JW |
1364 | /// Class template _Bind is always a bind expression. |
1365 | template<typename _Signature> | |
1366 | struct is_bind_expression<const _Bind<_Signature> > | |
1367 | { static const bool value = true; }; | |
1368 | ||
1369 | template<typename _Signature> | |
1370 | const bool is_bind_expression<const _Bind<_Signature> >::value; | |
1371 | ||
1372 | /// Class template _Bind is always a bind expression. | |
1373 | template<typename _Signature> | |
1374 | struct is_bind_expression<volatile _Bind<_Signature> > | |
1375 | { static const bool value = true; }; | |
1376 | ||
1377 | template<typename _Signature> | |
1378 | const bool is_bind_expression<volatile _Bind<_Signature> >::value; | |
1379 | ||
1380 | /// Class template _Bind is always a bind expression. | |
1381 | template<typename _Signature> | |
1382 | struct is_bind_expression<const volatile _Bind<_Signature> > | |
1383 | { static const bool value = true; }; | |
1384 | ||
1385 | template<typename _Signature> | |
1386 | const bool is_bind_expression<const volatile _Bind<_Signature> >::value; | |
1387 | ||
7aec2c63 PC |
1388 | /// Class template _Bind_result is always a bind expression. |
1389 | template<typename _Result, typename _Signature> | |
1390 | struct is_bind_expression<_Bind_result<_Result, _Signature> > | |
1391 | { static const bool value = true; }; | |
1392 | ||
1393 | template<typename _Result, typename _Signature> | |
1394 | const bool is_bind_expression<_Bind_result<_Result, _Signature> >::value; | |
1395 | ||
e02a5443 JW |
1396 | /// Class template _Bind_result is always a bind expression. |
1397 | template<typename _Result, typename _Signature> | |
1398 | struct is_bind_expression<const _Bind_result<_Result, _Signature> > | |
1399 | { static const bool value = true; }; | |
1400 | ||
1401 | template<typename _Result, typename _Signature> | |
1402 | const bool | |
1403 | is_bind_expression<const _Bind_result<_Result, _Signature> >::value; | |
1404 | ||
1405 | /// Class template _Bind_result is always a bind expression. | |
1406 | template<typename _Result, typename _Signature> | |
1407 | struct is_bind_expression<volatile _Bind_result<_Result, _Signature> > | |
1408 | { static const bool value = true; }; | |
1409 | ||
1410 | template<typename _Result, typename _Signature> | |
1411 | const bool | |
1412 | is_bind_expression<volatile _Bind_result<_Result, _Signature> >::value; | |
1413 | ||
1414 | /// Class template _Bind_result is always a bind expression. | |
1415 | template<typename _Result, typename _Signature> | |
1416 | struct | |
1417 | is_bind_expression<const volatile _Bind_result<_Result, _Signature> > | |
1418 | { static const bool value = true; }; | |
1419 | ||
1420 | template<typename _Result, typename _Signature> | |
1421 | const bool | |
1422 | is_bind_expression<const volatile _Bind_result<_Result, | |
1423 | _Signature> >::value; | |
1424 | ||
734f5023 | 1425 | #if __cplusplus >= 201103L |
e02a5443 JW |
1426 | template<typename _Signature> |
1427 | struct is_bind_expression<std::_Bind<_Signature>> | |
1428 | : true_type { }; | |
1429 | ||
1430 | template<typename _Signature> | |
1431 | struct is_bind_expression<const std::_Bind<_Signature>> | |
1432 | : true_type { }; | |
1433 | ||
1434 | template<typename _Signature> | |
1435 | struct is_bind_expression<volatile std::_Bind<_Signature>> | |
1436 | : true_type { }; | |
1437 | ||
1438 | template<typename _Signature> | |
1439 | struct is_bind_expression<const volatile std::_Bind<_Signature>> | |
1440 | : true_type { }; | |
1441 | ||
1442 | template<typename _Result, typename _Signature> | |
1443 | struct is_bind_expression<std::_Bind_result<_Result, _Signature>> | |
1444 | : true_type { }; | |
1445 | ||
1446 | template<typename _Result, typename _Signature> | |
1447 | struct is_bind_expression<const std::_Bind_result<_Result, _Signature>> | |
1448 | : true_type { }; | |
1449 | ||
1450 | template<typename _Result, typename _Signature> | |
1451 | struct is_bind_expression<volatile std::_Bind_result<_Result, _Signature>> | |
1452 | : true_type { }; | |
1453 | ||
1454 | template<typename _Result, typename _Signature> | |
1455 | struct is_bind_expression<const volatile std::_Bind_result<_Result, | |
1456 | _Signature>> | |
1457 | : true_type { }; | |
1458 | #endif | |
1459 | ||
7aec2c63 PC |
1460 | /// bind |
1461 | template<typename _Functor, typename... _ArgTypes> | |
1462 | inline | |
1463 | _Bind<typename _Maybe_wrap_member_pointer<_Functor>::type(_ArgTypes...)> | |
1464 | bind(_Functor __f, _ArgTypes... __args) | |
1465 | { | |
1466 | typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type; | |
1467 | typedef typename __maybe_type::type __functor_type; | |
1468 | typedef _Bind<__functor_type(_ArgTypes...)> __result_type; | |
1469 | return __result_type(__maybe_type::__do_wrap(__f), __args...); | |
1470 | } | |
1471 | ||
1472 | template<typename _Result, typename _Functor, typename... _ArgTypes> | |
1473 | inline | |
1474 | _Bind_result<_Result, | |
1475 | typename _Maybe_wrap_member_pointer<_Functor>::type | |
1476 | (_ArgTypes...)> | |
1477 | bind(_Functor __f, _ArgTypes... __args) | |
1478 | { | |
1479 | typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type; | |
1480 | typedef typename __maybe_type::type __functor_type; | |
1481 | typedef _Bind_result<_Result, __functor_type(_ArgTypes...)> | |
1482 | __result_type; | |
1483 | return __result_type(__maybe_type::__do_wrap(__f), __args...); | |
1484 | } | |
1485 | ||
1486 | /** | |
1487 | * @brief Exception class thrown when class template function's | |
1488 | * operator() is called with an empty target. | |
1489 | * @ingroup exceptions | |
1490 | */ | |
1491 | class bad_function_call : public std::exception { }; | |
1492 | ||
1493 | /** | |
1494 | * The integral constant expression 0 can be converted into a | |
1495 | * pointer to this type. It is used by the function template to | |
1496 | * accept NULL pointers. | |
1497 | */ | |
1498 | struct _M_clear_type; | |
1499 | ||
1500 | /** | |
2a60a9f6 | 1501 | * Trait identifying @a location-invariant types, meaning that the |
7aec2c63 PC |
1502 | * address of the object (or any of its members) will not escape. |
1503 | * Also implies a trivial copy constructor and assignment operator. | |
1504 | */ | |
1505 | template<typename _Tp> | |
1506 | struct __is_location_invariant | |
1507 | : integral_constant<bool, | |
1508 | (is_pointer<_Tp>::value | |
1509 | || is_member_pointer<_Tp>::value)> | |
1510 | { | |
1511 | }; | |
1512 | ||
1513 | class _Undefined_class; | |
1514 | ||
1515 | union _Nocopy_types | |
1516 | { | |
1517 | void* _M_object; | |
1518 | const void* _M_const_object; | |
1519 | void (*_M_function_pointer)(); | |
1520 | void (_Undefined_class::*_M_member_pointer)(); | |
1521 | }; | |
1522 | ||
1523 | union _Any_data | |
1524 | { | |
1525 | void* _M_access() { return &_M_pod_data[0]; } | |
1526 | const void* _M_access() const { return &_M_pod_data[0]; } | |
1527 | ||
1528 | template<typename _Tp> | |
1529 | _Tp& | |
1530 | _M_access() | |
1531 | { return *static_cast<_Tp*>(_M_access()); } | |
1532 | ||
1533 | template<typename _Tp> | |
1534 | const _Tp& | |
1535 | _M_access() const | |
1536 | { return *static_cast<const _Tp*>(_M_access()); } | |
1537 | ||
1538 | _Nocopy_types _M_unused; | |
1539 | char _M_pod_data[sizeof(_Nocopy_types)]; | |
1540 | }; | |
1541 | ||
1542 | enum _Manager_operation | |
1543 | { | |
1544 | __get_type_info, | |
1545 | __get_functor_ptr, | |
1546 | __clone_functor, | |
1547 | __destroy_functor | |
1548 | }; | |
1549 | ||
1550 | // Simple type wrapper that helps avoid annoying const problems | |
1551 | // when casting between void pointers and pointers-to-pointers. | |
1552 | template<typename _Tp> | |
1553 | struct _Simple_type_wrapper | |
1554 | { | |
1555 | _Simple_type_wrapper(_Tp __value) : __value(__value) { } | |
1556 | ||
1557 | _Tp __value; | |
1558 | }; | |
1559 | ||
1560 | template<typename _Tp> | |
1561 | struct __is_location_invariant<_Simple_type_wrapper<_Tp> > | |
1562 | : __is_location_invariant<_Tp> | |
1563 | { | |
1564 | }; | |
1565 | ||
1566 | // Converts a reference to a function object into a callable | |
1567 | // function object. | |
1568 | template<typename _Functor> | |
1569 | inline _Functor& | |
1570 | __callable_functor(_Functor& __f) | |
1571 | { return __f; } | |
1572 | ||
1573 | template<typename _Member, typename _Class> | |
1574 | inline _Mem_fn<_Member _Class::*> | |
1575 | __callable_functor(_Member _Class::* &__p) | |
1576 | { return mem_fn(__p); } | |
1577 | ||
1578 | template<typename _Member, typename _Class> | |
1579 | inline _Mem_fn<_Member _Class::*> | |
1580 | __callable_functor(_Member _Class::* const &__p) | |
1581 | { return mem_fn(__p); } | |
1582 | ||
1583 | template<typename _Signature> | |
1584 | class function; | |
1585 | ||
1586 | /// Base class of all polymorphic function object wrappers. | |
1587 | class _Function_base | |
1588 | { | |
1589 | public: | |
1590 | static const std::size_t _M_max_size = sizeof(_Nocopy_types); | |
1591 | static const std::size_t _M_max_align = __alignof__(_Nocopy_types); | |
1592 | ||
1593 | template<typename _Functor> | |
1594 | class _Base_manager | |
1595 | { | |
1596 | protected: | |
1597 | static const bool __stored_locally = | |
1598 | (__is_location_invariant<_Functor>::value | |
1599 | && sizeof(_Functor) <= _M_max_size | |
1600 | && __alignof__(_Functor) <= _M_max_align | |
1601 | && (_M_max_align % __alignof__(_Functor) == 0)); | |
1602 | ||
1603 | typedef integral_constant<bool, __stored_locally> _Local_storage; | |
1604 | ||
1605 | // Retrieve a pointer to the function object | |
1606 | static _Functor* | |
1607 | _M_get_pointer(const _Any_data& __source) | |
1608 | { | |
1609 | const _Functor* __ptr = | |
99ace34a | 1610 | __stored_locally? std::__addressof(__source._M_access<_Functor>()) |
7aec2c63 PC |
1611 | /* have stored a pointer */ : __source._M_access<_Functor*>(); |
1612 | return const_cast<_Functor*>(__ptr); | |
1613 | } | |
1614 | ||
1615 | // Clone a location-invariant function object that fits within | |
1616 | // an _Any_data structure. | |
1617 | static void | |
1618 | _M_clone(_Any_data& __dest, const _Any_data& __source, true_type) | |
1619 | { | |
1620 | new (__dest._M_access()) _Functor(__source._M_access<_Functor>()); | |
1621 | } | |
1622 | ||
1623 | // Clone a function object that is not location-invariant or | |
1624 | // that cannot fit into an _Any_data structure. | |
1625 | static void | |
1626 | _M_clone(_Any_data& __dest, const _Any_data& __source, false_type) | |
1627 | { | |
1628 | __dest._M_access<_Functor*>() = | |
1629 | new _Functor(*__source._M_access<_Functor*>()); | |
1630 | } | |
1631 | ||
1632 | // Destroying a location-invariant object may still require | |
1633 | // destruction. | |
1634 | static void | |
1635 | _M_destroy(_Any_data& __victim, true_type) | |
1636 | { | |
1637 | __victim._M_access<_Functor>().~_Functor(); | |
1638 | } | |
1639 | ||
1640 | // Destroying an object located on the heap. | |
1641 | static void | |
1642 | _M_destroy(_Any_data& __victim, false_type) | |
1643 | { | |
1644 | delete __victim._M_access<_Functor*>(); | |
1645 | } | |
1646 | ||
1647 | public: | |
1648 | static bool | |
1649 | _M_manager(_Any_data& __dest, const _Any_data& __source, | |
1650 | _Manager_operation __op) | |
1651 | { | |
1652 | switch (__op) | |
1653 | { | |
0f3d27f0 | 1654 | #if __cpp_rtti |
7aec2c63 PC |
1655 | case __get_type_info: |
1656 | __dest._M_access<const type_info*>() = &typeid(_Functor); | |
1657 | break; | |
1658 | #endif | |
1659 | case __get_functor_ptr: | |
1660 | __dest._M_access<_Functor*>() = _M_get_pointer(__source); | |
1661 | break; | |
1662 | ||
1663 | case __clone_functor: | |
1664 | _M_clone(__dest, __source, _Local_storage()); | |
1665 | break; | |
1666 | ||
1667 | case __destroy_functor: | |
1668 | _M_destroy(__dest, _Local_storage()); | |
1669 | break; | |
1670 | } | |
1671 | return false; | |
1672 | } | |
1673 | ||
1674 | static void | |
1675 | _M_init_functor(_Any_data& __functor, const _Functor& __f) | |
1676 | { _M_init_functor(__functor, __f, _Local_storage()); } | |
1677 | ||
1678 | template<typename _Signature> | |
1679 | static bool | |
1680 | _M_not_empty_function(const function<_Signature>& __f) | |
1681 | { return static_cast<bool>(__f); } | |
1682 | ||
1683 | template<typename _Tp> | |
1684 | static bool | |
1685 | _M_not_empty_function(const _Tp*& __fp) | |
1686 | { return __fp; } | |
1687 | ||
1688 | template<typename _Class, typename _Tp> | |
1689 | static bool | |
1690 | _M_not_empty_function(_Tp _Class::* const& __mp) | |
1691 | { return __mp; } | |
1692 | ||
1693 | template<typename _Tp> | |
1694 | static bool | |
1695 | _M_not_empty_function(const _Tp&) | |
1696 | { return true; } | |
1697 | ||
1698 | private: | |
1699 | static void | |
1700 | _M_init_functor(_Any_data& __functor, const _Functor& __f, true_type) | |
1701 | { new (__functor._M_access()) _Functor(__f); } | |
1702 | ||
1703 | static void | |
1704 | _M_init_functor(_Any_data& __functor, const _Functor& __f, false_type) | |
1705 | { __functor._M_access<_Functor*>() = new _Functor(__f); } | |
1706 | }; | |
1707 | ||
1708 | template<typename _Functor> | |
1709 | class _Ref_manager : public _Base_manager<_Functor*> | |
1710 | { | |
1711 | typedef _Function_base::_Base_manager<_Functor*> _Base; | |
1712 | ||
1713 | public: | |
1714 | static bool | |
1715 | _M_manager(_Any_data& __dest, const _Any_data& __source, | |
1716 | _Manager_operation __op) | |
1717 | { | |
1718 | switch (__op) | |
1719 | { | |
0f3d27f0 | 1720 | #if __cpp_rtti |
7aec2c63 PC |
1721 | case __get_type_info: |
1722 | __dest._M_access<const type_info*>() = &typeid(_Functor); | |
1723 | break; | |
1724 | #endif | |
1725 | case __get_functor_ptr: | |
1726 | __dest._M_access<_Functor*>() = *_Base::_M_get_pointer(__source); | |
1727 | return is_const<_Functor>::value; | |
1728 | break; | |
1729 | ||
1730 | default: | |
1731 | _Base::_M_manager(__dest, __source, __op); | |
1732 | } | |
1733 | return false; | |
1734 | } | |
1735 | ||
1736 | static void | |
1737 | _M_init_functor(_Any_data& __functor, reference_wrapper<_Functor> __f) | |
1738 | { | |
99ace34a | 1739 | _Base::_M_init_functor(__functor, std::__addressof(__f.get())); |
7aec2c63 PC |
1740 | } |
1741 | }; | |
1742 | ||
1743 | _Function_base() : _M_manager(0) { } | |
1744 | ||
1745 | ~_Function_base() | |
1746 | { | |
1747 | if (_M_manager) | |
1748 | _M_manager(_M_functor, _M_functor, __destroy_functor); | |
1749 | } | |
1750 | ||
1751 | ||
1752 | bool _M_empty() const { return !_M_manager; } | |
1753 | ||
1754 | typedef bool (*_Manager_type)(_Any_data&, const _Any_data&, | |
1755 | _Manager_operation); | |
1756 | ||
1757 | _Any_data _M_functor; | |
1758 | _Manager_type _M_manager; | |
1759 | }; | |
1760 | ||
1761 | template<typename _Signature, typename _Functor> | |
1762 | class _Function_handler; | |
1763 | ||
1764 | template<typename _Res, typename _Functor, typename... _ArgTypes> | |
1765 | class _Function_handler<_Res(_ArgTypes...), _Functor> | |
1766 | : public _Function_base::_Base_manager<_Functor> | |
1767 | { | |
1768 | typedef _Function_base::_Base_manager<_Functor> _Base; | |
1769 | ||
1770 | public: | |
1771 | static _Res | |
1772 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1773 | { | |
1774 | return (*_Base::_M_get_pointer(__functor))(__args...); | |
1775 | } | |
1776 | }; | |
1777 | ||
1778 | template<typename _Functor, typename... _ArgTypes> | |
1779 | class _Function_handler<void(_ArgTypes...), _Functor> | |
1780 | : public _Function_base::_Base_manager<_Functor> | |
1781 | { | |
1782 | typedef _Function_base::_Base_manager<_Functor> _Base; | |
1783 | ||
1784 | public: | |
1785 | static void | |
1786 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1787 | { | |
1788 | (*_Base::_M_get_pointer(__functor))(__args...); | |
1789 | } | |
1790 | }; | |
1791 | ||
1792 | template<typename _Res, typename _Functor, typename... _ArgTypes> | |
1793 | class _Function_handler<_Res(_ArgTypes...), reference_wrapper<_Functor> > | |
1794 | : public _Function_base::_Ref_manager<_Functor> | |
1795 | { | |
1796 | typedef _Function_base::_Ref_manager<_Functor> _Base; | |
1797 | ||
1798 | public: | |
1799 | static _Res | |
1800 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1801 | { | |
1802 | return | |
1803 | __callable_functor(**_Base::_M_get_pointer(__functor))(__args...); | |
1804 | } | |
1805 | }; | |
1806 | ||
1807 | template<typename _Functor, typename... _ArgTypes> | |
1808 | class _Function_handler<void(_ArgTypes...), reference_wrapper<_Functor> > | |
1809 | : public _Function_base::_Ref_manager<_Functor> | |
1810 | { | |
1811 | typedef _Function_base::_Ref_manager<_Functor> _Base; | |
1812 | ||
1813 | public: | |
1814 | static void | |
1815 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1816 | { | |
1817 | __callable_functor(**_Base::_M_get_pointer(__functor))(__args...); | |
1818 | } | |
1819 | }; | |
1820 | ||
1821 | template<typename _Class, typename _Member, typename _Res, | |
1822 | typename... _ArgTypes> | |
1823 | class _Function_handler<_Res(_ArgTypes...), _Member _Class::*> | |
1824 | : public _Function_handler<void(_ArgTypes...), _Member _Class::*> | |
1825 | { | |
1826 | typedef _Function_handler<void(_ArgTypes...), _Member _Class::*> | |
1827 | _Base; | |
1828 | ||
1829 | public: | |
1830 | static _Res | |
1831 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1832 | { | |
1833 | return tr1:: | |
1834 | mem_fn(_Base::_M_get_pointer(__functor)->__value)(__args...); | |
1835 | } | |
1836 | }; | |
1837 | ||
1838 | template<typename _Class, typename _Member, typename... _ArgTypes> | |
1839 | class _Function_handler<void(_ArgTypes...), _Member _Class::*> | |
1840 | : public _Function_base::_Base_manager< | |
1841 | _Simple_type_wrapper< _Member _Class::* > > | |
1842 | { | |
1843 | typedef _Member _Class::* _Functor; | |
1844 | typedef _Simple_type_wrapper<_Functor> _Wrapper; | |
1845 | typedef _Function_base::_Base_manager<_Wrapper> _Base; | |
1846 | ||
1847 | public: | |
1848 | static bool | |
1849 | _M_manager(_Any_data& __dest, const _Any_data& __source, | |
1850 | _Manager_operation __op) | |
1851 | { | |
1852 | switch (__op) | |
1853 | { | |
0f3d27f0 | 1854 | #if __cpp_rtti |
7aec2c63 PC |
1855 | case __get_type_info: |
1856 | __dest._M_access<const type_info*>() = &typeid(_Functor); | |
1857 | break; | |
1858 | #endif | |
1859 | case __get_functor_ptr: | |
1860 | __dest._M_access<_Functor*>() = | |
1861 | &_Base::_M_get_pointer(__source)->__value; | |
1862 | break; | |
1863 | ||
1864 | default: | |
1865 | _Base::_M_manager(__dest, __source, __op); | |
1866 | } | |
1867 | return false; | |
1868 | } | |
1869 | ||
1870 | static void | |
1871 | _M_invoke(const _Any_data& __functor, _ArgTypes... __args) | |
1872 | { | |
1873 | tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value)(__args...); | |
1874 | } | |
1875 | }; | |
1876 | ||
1877 | /// class function | |
1878 | template<typename _Res, typename... _ArgTypes> | |
1879 | class function<_Res(_ArgTypes...)> | |
1880 | : public _Maybe_unary_or_binary_function<_Res, _ArgTypes...>, | |
1881 | private _Function_base | |
1882 | { | |
734f5023 | 1883 | #if __cplusplus < 201103L |
7aec2c63 PC |
1884 | /// This class is used to implement the safe_bool idiom. |
1885 | struct _Hidden_type | |
1886 | { | |
1887 | _Hidden_type* _M_bool; | |
1888 | }; | |
1889 | ||
1890 | /// This typedef is used to implement the safe_bool idiom. | |
1891 | typedef _Hidden_type* _Hidden_type::* _Safe_bool; | |
1892 | #endif | |
1893 | ||
1894 | typedef _Res _Signature_type(_ArgTypes...); | |
1895 | ||
1896 | struct _Useless { }; | |
1897 | ||
1898 | public: | |
1899 | typedef _Res result_type; | |
1900 | ||
1901 | // [3.7.2.1] construct/copy/destroy | |
1902 | ||
1903 | /** | |
1904 | * @brief Default construct creates an empty function call wrapper. | |
1905 | * @post @c !(bool)*this | |
1906 | */ | |
1907 | function() : _Function_base() { } | |
1908 | ||
1909 | /** | |
1910 | * @brief Default construct creates an empty function call wrapper. | |
1911 | * @post @c !(bool)*this | |
1912 | */ | |
1913 | function(_M_clear_type*) : _Function_base() { } | |
1914 | ||
1915 | /** | |
1916 | * @brief %Function copy constructor. | |
1917 | * @param x A %function object with identical call signature. | |
1918 | * @post @c (bool)*this == (bool)x | |
1919 | * | |
1920 | * The newly-created %function contains a copy of the target of @a | |
1921 | * x (if it has one). | |
1922 | */ | |
1923 | function(const function& __x); | |
1924 | ||
1925 | /** | |
1926 | * @brief Builds a %function that targets a copy of the incoming | |
1927 | * function object. | |
1928 | * @param f A %function object that is callable with parameters of | |
1929 | * type @c T1, @c T2, ..., @c TN and returns a value convertible | |
1930 | * to @c Res. | |
1931 | * | |
1932 | * The newly-created %function object will target a copy of @a | |
1933 | * f. If @a f is @c reference_wrapper<F>, then this function | |
1934 | * object will contain a reference to the function object @c | |
1935 | * f.get(). If @a f is a NULL function pointer or NULL | |
1936 | * pointer-to-member, the newly-created object will be empty. | |
1937 | * | |
1938 | * If @a f is a non-NULL function pointer or an object of type @c | |
1939 | * reference_wrapper<F>, this function will not throw. | |
1940 | */ | |
1941 | template<typename _Functor> | |
1942 | function(_Functor __f, | |
1943 | typename __gnu_cxx::__enable_if< | |
1944 | !is_integral<_Functor>::value, _Useless>::__type | |
1945 | = _Useless()); | |
1946 | ||
1947 | /** | |
1948 | * @brief %Function assignment operator. | |
1949 | * @param x A %function with identical call signature. | |
1950 | * @post @c (bool)*this == (bool)x | |
1951 | * @returns @c *this | |
1952 | * | |
1953 | * The target of @a x is copied to @c *this. If @a x has no | |
1954 | * target, then @c *this will be empty. | |
1955 | * | |
1956 | * If @a x targets a function pointer or a reference to a function | |
1957 | * object, then this operation will not throw an %exception. | |
1958 | */ | |
1959 | function& | |
1960 | operator=(const function& __x) | |
1961 | { | |
1962 | function(__x).swap(*this); | |
1963 | return *this; | |
1964 | } | |
1965 | ||
1966 | /** | |
1967 | * @brief %Function assignment to zero. | |
1968 | * @post @c !(bool)*this | |
1969 | * @returns @c *this | |
1970 | * | |
1971 | * The target of @c *this is deallocated, leaving it empty. | |
1972 | */ | |
1973 | function& | |
1974 | operator=(_M_clear_type*) | |
1975 | { | |
1976 | if (_M_manager) | |
1977 | { | |
1978 | _M_manager(_M_functor, _M_functor, __destroy_functor); | |
1979 | _M_manager = 0; | |
1980 | _M_invoker = 0; | |
1981 | } | |
1982 | return *this; | |
1983 | } | |
1984 | ||
1985 | /** | |
1986 | * @brief %Function assignment to a new target. | |
1987 | * @param f A %function object that is callable with parameters of | |
1988 | * type @c T1, @c T2, ..., @c TN and returns a value convertible | |
1989 | * to @c Res. | |
1990 | * @return @c *this | |
1991 | * | |
1992 | * This %function object wrapper will target a copy of @a | |
1993 | * f. If @a f is @c reference_wrapper<F>, then this function | |
1994 | * object will contain a reference to the function object @c | |
1995 | * f.get(). If @a f is a NULL function pointer or NULL | |
1996 | * pointer-to-member, @c this object will be empty. | |
1997 | * | |
1998 | * If @a f is a non-NULL function pointer or an object of type @c | |
1999 | * reference_wrapper<F>, this function will not throw. | |
2000 | */ | |
2001 | template<typename _Functor> | |
2002 | typename __gnu_cxx::__enable_if<!is_integral<_Functor>::value, | |
2003 | function&>::__type | |
2004 | operator=(_Functor __f) | |
2005 | { | |
2006 | function(__f).swap(*this); | |
2007 | return *this; | |
2008 | } | |
2009 | ||
2010 | // [3.7.2.2] function modifiers | |
2011 | ||
2012 | /** | |
2013 | * @brief Swap the targets of two %function objects. | |
2014 | * @param f A %function with identical call signature. | |
2015 | * | |
2016 | * Swap the targets of @c this function object and @a f. This | |
2017 | * function will not throw an %exception. | |
2018 | */ | |
2019 | void swap(function& __x) | |
2020 | { | |
6703f185 PC |
2021 | std::swap(_M_functor, __x._M_functor); |
2022 | std::swap(_M_manager, __x._M_manager); | |
2023 | std::swap(_M_invoker, __x._M_invoker); | |
7aec2c63 PC |
2024 | } |
2025 | ||
2026 | // [3.7.2.3] function capacity | |
2027 | ||
2028 | /** | |
2029 | * @brief Determine if the %function wrapper has a target. | |
2030 | * | |
2031 | * @return @c true when this %function object contains a target, | |
2032 | * or @c false when it is empty. | |
2033 | * | |
2034 | * This function will not throw an %exception. | |
2035 | */ | |
734f5023 | 2036 | #if __cplusplus >= 201103L |
7aec2c63 PC |
2037 | explicit operator bool() const |
2038 | { return !_M_empty(); } | |
9eeea761 | 2039 | #else |
7aec2c63 PC |
2040 | operator _Safe_bool() const |
2041 | { | |
2042 | if (_M_empty()) | |
2043 | return 0; | |
2044 | else | |
2045 | return &_Hidden_type::_M_bool; | |
2046 | } | |
9eeea761 | 2047 | #endif |
0179f2c6 | 2048 | |
7aec2c63 PC |
2049 | // [3.7.2.4] function invocation |
2050 | ||
2051 | /** | |
2052 | * @brief Invokes the function targeted by @c *this. | |
2053 | * @returns the result of the target. | |
2054 | * @throws bad_function_call when @c !(bool)*this | |
2055 | * | |
2056 | * The function call operator invokes the target function object | |
2057 | * stored by @c this. | |
2058 | */ | |
2059 | _Res operator()(_ArgTypes... __args) const; | |
2060 | ||
0f3d27f0 | 2061 | #if __cpp_rtti |
7aec2c63 PC |
2062 | // [3.7.2.5] function target access |
2063 | /** | |
2064 | * @brief Determine the type of the target of this function object | |
2065 | * wrapper. | |
2066 | * | |
2067 | * @returns the type identifier of the target function object, or | |
2068 | * @c typeid(void) if @c !(bool)*this. | |
2069 | * | |
2070 | * This function will not throw an %exception. | |
2071 | */ | |
2072 | const type_info& target_type() const; | |
2073 | ||
2074 | /** | |
2075 | * @brief Access the stored target function object. | |
2076 | * | |
2077 | * @return Returns a pointer to the stored target function object, | |
2078 | * if @c typeid(Functor).equals(target_type()); otherwise, a NULL | |
2079 | * pointer. | |
2080 | * | |
2081 | * This function will not throw an %exception. | |
2082 | */ | |
2083 | template<typename _Functor> _Functor* target(); | |
2084 | ||
2085 | /// @overload | |
2086 | template<typename _Functor> const _Functor* target() const; | |
2087 | #endif | |
2088 | ||
2089 | private: | |
2090 | // [3.7.2.6] undefined operators | |
2091 | template<typename _Function> | |
2092 | void operator==(const function<_Function>&) const; | |
2093 | template<typename _Function> | |
2094 | void operator!=(const function<_Function>&) const; | |
2095 | ||
2096 | typedef _Res (*_Invoker_type)(const _Any_data&, _ArgTypes...); | |
2097 | _Invoker_type _M_invoker; | |
2098 | }; | |
2099 | ||
2100 | template<typename _Res, typename... _ArgTypes> | |
2101 | function<_Res(_ArgTypes...)>:: | |
2102 | function(const function& __x) | |
2103 | : _Function_base() | |
2104 | { | |
2105 | if (static_cast<bool>(__x)) | |
2106 | { | |
7b55fa54 | 2107 | __x._M_manager(_M_functor, __x._M_functor, __clone_functor); |
7aec2c63 PC |
2108 | _M_invoker = __x._M_invoker; |
2109 | _M_manager = __x._M_manager; | |
7aec2c63 PC |
2110 | } |
2111 | } | |
2112 | ||
2113 | template<typename _Res, typename... _ArgTypes> | |
2114 | template<typename _Functor> | |
2115 | function<_Res(_ArgTypes...)>:: | |
2116 | function(_Functor __f, | |
2117 | typename __gnu_cxx::__enable_if< | |
2118 | !is_integral<_Functor>::value, _Useless>::__type) | |
2119 | : _Function_base() | |
2120 | { | |
2121 | typedef _Function_handler<_Signature_type, _Functor> _My_handler; | |
2122 | ||
2123 | if (_My_handler::_M_not_empty_function(__f)) | |
2124 | { | |
7b55fa54 | 2125 | _My_handler::_M_init_functor(_M_functor, __f); |
7aec2c63 PC |
2126 | _M_invoker = &_My_handler::_M_invoke; |
2127 | _M_manager = &_My_handler::_M_manager; | |
7aec2c63 PC |
2128 | } |
2129 | } | |
2130 | ||
2131 | template<typename _Res, typename... _ArgTypes> | |
2132 | _Res | |
2133 | function<_Res(_ArgTypes...)>:: | |
2134 | operator()(_ArgTypes... __args) const | |
2135 | { | |
2136 | if (_M_empty()) | |
54ba39f5 | 2137 | _GLIBCXX_THROW_OR_ABORT(bad_function_call()); |
7aec2c63 PC |
2138 | return _M_invoker(_M_functor, __args...); |
2139 | } | |
2140 | ||
0f3d27f0 | 2141 | #if __cpp_rtti |
7aec2c63 PC |
2142 | template<typename _Res, typename... _ArgTypes> |
2143 | const type_info& | |
2144 | function<_Res(_ArgTypes...)>:: | |
2145 | target_type() const | |
2146 | { | |
2147 | if (_M_manager) | |
2148 | { | |
2149 | _Any_data __typeinfo_result; | |
2150 | _M_manager(__typeinfo_result, _M_functor, __get_type_info); | |
2151 | return *__typeinfo_result._M_access<const type_info*>(); | |
2152 | } | |
2153 | else | |
2154 | return typeid(void); | |
2155 | } | |
2156 | ||
2157 | template<typename _Res, typename... _ArgTypes> | |
2158 | template<typename _Functor> | |
2159 | _Functor* | |
2160 | function<_Res(_ArgTypes...)>:: | |
2161 | target() | |
2162 | { | |
2163 | if (typeid(_Functor) == target_type() && _M_manager) | |
2164 | { | |
2165 | _Any_data __ptr; | |
2166 | if (_M_manager(__ptr, _M_functor, __get_functor_ptr) | |
2167 | && !is_const<_Functor>::value) | |
2168 | return 0; | |
2169 | else | |
2170 | return __ptr._M_access<_Functor*>(); | |
2171 | } | |
2172 | else | |
2173 | return 0; | |
2174 | } | |
2175 | ||
2176 | template<typename _Res, typename... _ArgTypes> | |
2177 | template<typename _Functor> | |
2178 | const _Functor* | |
2179 | function<_Res(_ArgTypes...)>:: | |
2180 | target() const | |
2181 | { | |
2182 | if (typeid(_Functor) == target_type() && _M_manager) | |
2183 | { | |
2184 | _Any_data __ptr; | |
2185 | _M_manager(__ptr, _M_functor, __get_functor_ptr); | |
2186 | return __ptr._M_access<const _Functor*>(); | |
2187 | } | |
2188 | else | |
2189 | return 0; | |
2190 | } | |
2191 | #endif | |
2192 | ||
2193 | // [3.7.2.7] null pointer comparisons | |
2194 | ||
2195 | /** | |
2196 | * @brief Compares a polymorphic function object wrapper against 0 | |
2197 | * (the NULL pointer). | |
2198 | * @returns @c true if the wrapper has no target, @c false otherwise | |
2199 | * | |
2200 | * This function will not throw an %exception. | |
2201 | */ | |
2202 | template<typename _Signature> | |
2203 | inline bool | |
2204 | operator==(const function<_Signature>& __f, _M_clear_type*) | |
2205 | { return !static_cast<bool>(__f); } | |
2206 | ||
2207 | /// @overload | |
2208 | template<typename _Signature> | |
2209 | inline bool | |
2210 | operator==(_M_clear_type*, const function<_Signature>& __f) | |
2211 | { return !static_cast<bool>(__f); } | |
2212 | ||
2213 | /** | |
2214 | * @brief Compares a polymorphic function object wrapper against 0 | |
2215 | * (the NULL pointer). | |
2216 | * @returns @c false if the wrapper has no target, @c true otherwise | |
2217 | * | |
2218 | * This function will not throw an %exception. | |
2219 | */ | |
2220 | template<typename _Signature> | |
2221 | inline bool | |
2222 | operator!=(const function<_Signature>& __f, _M_clear_type*) | |
2223 | { return static_cast<bool>(__f); } | |
2224 | ||
2225 | /// @overload | |
2226 | template<typename _Signature> | |
2227 | inline bool | |
2228 | operator!=(_M_clear_type*, const function<_Signature>& __f) | |
2229 | { return static_cast<bool>(__f); } | |
2230 | ||
2231 | // [3.7.2.8] specialized algorithms | |
2232 | ||
2233 | /** | |
2234 | * @brief Swap the targets of two polymorphic function object wrappers. | |
2235 | * | |
2236 | * This function will not throw an %exception. | |
2237 | */ | |
2238 | template<typename _Signature> | |
2239 | inline void | |
2240 | swap(function<_Signature>& __x, function<_Signature>& __y) | |
2241 | { __x.swap(__y); } | |
2242 | } | |
e02a5443 | 2243 | |
734f5023 | 2244 | #if __cplusplus >= 201103L |
e02a5443 JW |
2245 | |
2246 | template<typename> struct is_placeholder; | |
2247 | ||
2248 | template<int _Num> | |
2249 | struct is_placeholder<tr1::_Placeholder<_Num>> | |
2250 | : integral_constant<int, _Num> | |
2251 | { }; | |
2252 | ||
2253 | template<int _Num> | |
2254 | struct is_placeholder<const tr1::_Placeholder<_Num>> | |
2255 | : integral_constant<int, _Num> | |
2256 | { }; | |
2257 | ||
2258 | template<typename> struct is_bind_expression; | |
2259 | ||
2260 | template<typename _Signature> | |
2261 | struct is_bind_expression<tr1::_Bind<_Signature>> | |
2262 | : true_type { }; | |
2263 | ||
2264 | template<typename _Signature> | |
2265 | struct is_bind_expression<const tr1::_Bind<_Signature>> | |
2266 | : true_type { }; | |
2267 | ||
2268 | template<typename _Signature> | |
2269 | struct is_bind_expression<volatile tr1::_Bind<_Signature>> | |
2270 | : true_type { }; | |
2271 | ||
2272 | template<typename _Signature> | |
2273 | struct is_bind_expression<const volatile tr1::_Bind<_Signature>> | |
2274 | : true_type { }; | |
2275 | ||
2276 | template<typename _Result, typename _Signature> | |
2277 | struct is_bind_expression<tr1::_Bind_result<_Result, _Signature>> | |
2278 | : true_type { }; | |
2279 | ||
2280 | template<typename _Result, typename _Signature> | |
2281 | struct is_bind_expression<const tr1::_Bind_result<_Result, _Signature>> | |
2282 | : true_type { }; | |
2283 | ||
2284 | template<typename _Result, typename _Signature> | |
2285 | struct is_bind_expression<volatile tr1::_Bind_result<_Result, _Signature>> | |
2286 | : true_type { }; | |
2287 | ||
2288 | template<typename _Result, typename _Signature> | |
2289 | struct is_bind_expression<const volatile tr1::_Bind_result<_Result, | |
2290 | _Signature>> | |
2291 | : true_type { }; | |
2292 | ||
4a15d842 | 2293 | #endif // C++11 |
e02a5443 | 2294 | _GLIBCXX_END_NAMESPACE_VERSION |
7aec2c63 PC |
2295 | } |
2296 | ||
e133ace8 | 2297 | #endif // _GLIBCXX_TR1_FUNCTIONAL |