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1 | // Boost.TypeErasure library |
2 | // | |
3 | // Copyright 2011 Steven Watanabe | |
4 | // | |
5 | // Distributed under the Boost Software License Version 1.0. (See | |
6 | // accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // $Id$ | |
10 | ||
11 | #ifndef BOOST_TYPE_ERASURE_ANY_HPP_INCLUDED | |
12 | #define BOOST_TYPE_ERASURE_ANY_HPP_INCLUDED | |
13 | ||
14 | #include <algorithm> | |
15 | #include <boost/config.hpp> | |
16 | #include <boost/utility/enable_if.hpp> | |
17 | #include <boost/utility/addressof.hpp> | |
18 | #include <boost/utility/declval.hpp> | |
19 | #include <boost/mpl/bool.hpp> | |
20 | #include <boost/mpl/or.hpp> | |
21 | #include <boost/mpl/pair.hpp> | |
22 | #include <boost/mpl/map.hpp> | |
23 | #include <boost/mpl/fold.hpp> | |
24 | #include <boost/type_traits/remove_reference.hpp> | |
25 | #include <boost/type_traits/remove_const.hpp> | |
26 | #include <boost/type_traits/is_same.hpp> | |
27 | #include <boost/type_traits/is_const.hpp> | |
28 | #include <boost/preprocessor/cat.hpp> | |
29 | #include <boost/preprocessor/iteration/iterate.hpp> | |
30 | #include <boost/preprocessor/repetition/enum_params.hpp> | |
31 | #include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
32 | #include <boost/preprocessor/repetition/enum_trailing_params.hpp> | |
33 | #include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp> | |
34 | #include <boost/type_erasure/detail/access.hpp> | |
35 | #include <boost/type_erasure/detail/any_base.hpp> | |
36 | #include <boost/type_erasure/detail/normalize.hpp> | |
37 | #include <boost/type_erasure/detail/storage.hpp> | |
38 | #include <boost/type_erasure/detail/instantiate.hpp> | |
39 | #include <boost/type_erasure/config.hpp> | |
40 | #include <boost/type_erasure/binding.hpp> | |
41 | #include <boost/type_erasure/static_binding.hpp> | |
42 | #include <boost/type_erasure/concept_interface.hpp> | |
43 | #include <boost/type_erasure/call.hpp> | |
44 | #include <boost/type_erasure/relaxed.hpp> | |
45 | #include <boost/type_erasure/param.hpp> | |
46 | ||
47 | namespace boost { | |
48 | namespace type_erasure { | |
49 | ||
50 | template<class Sig> | |
51 | struct constructible; | |
52 | ||
53 | template<class T> | |
54 | struct destructible; | |
55 | ||
56 | template<class T, class U> | |
57 | struct assignable; | |
58 | ||
59 | namespace detail { | |
60 | ||
61 | template<class Derived, class Concept, class T> | |
62 | struct compute_bases | |
63 | { | |
64 | typedef typename ::boost::mpl::fold< | |
65 | typename ::boost::type_erasure::detail::collect_concepts< | |
66 | Concept | |
67 | >::type, | |
68 | ::boost::type_erasure::any_base<Derived>, | |
69 | ::boost::type_erasure::concept_interface< | |
70 | ::boost::mpl::_2, | |
71 | ::boost::mpl::_1, | |
72 | T | |
73 | > | |
74 | >::type type; | |
75 | }; | |
76 | ||
77 | template<class T> | |
78 | T make(T*) { return T(); } | |
79 | ||
80 | // This dance is necessary to avoid errors calling | |
81 | // an ellipsis function with a non-trivially-copyable | |
82 | // argument. | |
83 | ||
84 | typedef char no; | |
85 | struct yes { no dummy[2]; }; | |
86 | ||
87 | template<class Op> | |
88 | yes check_overload(const Op*); | |
89 | no check_overload(const void*); | |
90 | ||
91 | struct fallback {}; | |
92 | ||
93 | template<class T> | |
94 | fallback make_fallback(const T&, boost::mpl::false_) | |
95 | { | |
96 | return fallback(); | |
97 | } | |
98 | ||
99 | template<class T> | |
100 | const T& make_fallback(const T& arg, boost::mpl::true_) | |
101 | { | |
102 | return arg; | |
103 | } | |
104 | ||
105 | template<class T> | |
106 | struct is_any : ::boost::mpl::false_ {}; | |
107 | ||
108 | template<class Concept, class T> | |
109 | struct is_any<any<Concept, T> > : ::boost::mpl::true_ {}; | |
110 | ||
111 | } | |
112 | ||
113 | #ifdef BOOST_MSVC | |
114 | #pragma warning(push) | |
115 | #pragma warning(disable:4355) | |
116 | #pragma warning(disable:4521) | |
117 | #endif | |
118 | ||
119 | /** | |
120 | * The class template @ref any can store any object that | |
121 | * models a specific \Concept. It dispatches all | |
122 | * the functions defined by the \Concept to the contained type | |
123 | * at runtime. | |
124 | * | |
125 | * \tparam Concept The \Concept that the stored type should model. | |
126 | * \tparam T A @ref placeholder specifying which type this is. | |
127 | * | |
128 | * \see concept_of, placeholder_of, \any_cast, \is_empty, \binding_of, \typeid_of | |
129 | */ | |
130 | template<class Concept, class T = _self> | |
131 | class any : | |
132 | public ::boost::type_erasure::detail::compute_bases< | |
133 | ::boost::type_erasure::any<Concept, T>, | |
134 | Concept, | |
135 | T | |
136 | >::type | |
137 | { | |
138 | typedef ::boost::type_erasure::binding<Concept> table_type; | |
139 | public: | |
140 | /** INTERNAL ONLY */ | |
141 | typedef Concept _boost_type_erasure_concept_type; | |
142 | /** INTERNAL ONLY */ | |
143 | any(const ::boost::type_erasure::detail::storage& data_arg, const table_type& table_arg) | |
144 | : table(table_arg), | |
145 | data(data_arg) | |
146 | {} | |
147 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
148 | /** INTERNAL ONLY */ | |
149 | any(::boost::type_erasure::detail::storage&& data_arg, const table_type& table_arg) | |
150 | : table(table_arg), | |
151 | data(data_arg) | |
152 | {} | |
153 | #endif | |
154 | /** | |
155 | * Constructs an empty @ref any. | |
156 | * | |
157 | * Except as otherwise noted, all operations on an | |
158 | * empty @ref any result in a @ref bad_function_call exception. | |
159 | * The copy-constructor of an empty @ref any creates another | |
160 | * null @ref any. The destructor of an empty @ref any is a no-op. | |
161 | * Comparison operators treat all empty @ref any "anys" as equal. | |
162 | * \typeid_of applied to an empty @ref any returns @c typeid(void). | |
163 | * | |
164 | * An @ref any which does not include @ref relaxed in its | |
165 | * \Concept can never be null. | |
166 | * | |
167 | * \pre @ref relaxed must be in @c Concept. | |
168 | * | |
169 | * \throws Nothing. | |
170 | * | |
171 | * @see \is_empty | |
172 | */ | |
173 | any() | |
174 | { | |
175 | BOOST_MPL_ASSERT((::boost::type_erasure::is_relaxed<Concept>)); | |
176 | data.data = 0; | |
177 | } | |
178 | ||
179 | #if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
180 | ||
181 | template<class U> | |
182 | any(const U& data_arg) | |
183 | : table(( | |
184 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, U), | |
185 | ::boost::type_erasure::make_binding< | |
186 | ::boost::mpl::map< ::boost::mpl::pair<T, U> > | |
187 | >() | |
188 | )), | |
189 | data(data_arg) | |
190 | {} | |
191 | template<class U, class Map> | |
192 | any(const U& data_arg, const static_binding<Map>& binding_arg) | |
193 | : table(( | |
194 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
195 | binding_arg | |
196 | )), | |
197 | data(data_arg) | |
198 | { | |
199 | BOOST_MPL_ASSERT((::boost::is_same< | |
200 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
201 | } | |
202 | ||
203 | #else | |
204 | ||
205 | /** | |
206 | * Constructs an @ref any to hold a copy of @c data. | |
207 | * The @c Concept will be instantiated with the | |
208 | * placeholder @c T bound to U. | |
209 | * | |
210 | * \param data The object to store in the @ref any. | |
211 | * | |
212 | * \pre @c U is a model of @c Concept. | |
213 | * \pre @c U must be \CopyConstructible. | |
214 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
215 | * | |
216 | * \throws std::bad_alloc or whatever that the copy | |
217 | * constructor of @c U throws. | |
218 | * | |
219 | * \note This constructor never matches if the argument is | |
220 | * an @ref any, @ref binding, or @ref static_binding. | |
221 | */ | |
222 | template<class U> | |
223 | any(U&& data_arg) | |
224 | : table(( | |
225 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, typename ::boost::remove_cv<typename ::boost::remove_reference<U>::type>::type), | |
226 | ::boost::type_erasure::make_binding< | |
227 | ::boost::mpl::map< ::boost::mpl::pair<T, typename ::boost::remove_cv<typename ::boost::remove_reference<U>::type>::type> > | |
228 | >() | |
229 | )), | |
230 | data(std::forward<U>(data_arg)) | |
231 | {} | |
232 | /** | |
233 | * Constructs an @ref any to hold a copy of @c data | |
234 | * with explicitly specified placeholder bindings. | |
235 | * | |
236 | * \param data The object to store in the @ref any. | |
237 | * \param binding Specifies the types that | |
238 | * all the placeholders should bind to. | |
239 | * | |
240 | * \pre @c U is a model of @c Concept. | |
241 | * \pre @c U must be \CopyConstructible. | |
242 | * \pre @c Map is an MPL map with an entry for every | |
243 | * non-deduced placeholder referred to by @c Concept. | |
244 | * \pre @c @c T must map to @c U in @c Map. | |
245 | * | |
246 | * \throws std::bad_alloc or whatever that the copy | |
247 | * constructor of @c U throws. | |
248 | * | |
249 | * \note This constructor never matches if the argument is an @ref any. | |
250 | */ | |
251 | template<class U, class Map> | |
252 | any(U&& data_arg, const static_binding<Map>& binding_arg) | |
253 | : table(( | |
254 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
255 | binding_arg | |
256 | )), | |
257 | data(std::forward<U>(data_arg)) | |
258 | { | |
259 | BOOST_MPL_ASSERT((::boost::is_same< | |
260 | typename ::boost::mpl::at<Map, T>::type, typename ::boost::remove_cv<typename ::boost::remove_reference<U>::type>::type>)); | |
261 | } | |
262 | ||
263 | #endif | |
264 | ||
265 | // Handle array/function-to-pointer decay | |
266 | /** INTERNAL ONLY */ | |
267 | template<class U> | |
268 | any(U* data_arg) | |
269 | : table(( | |
270 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, U*), | |
271 | ::boost::type_erasure::make_binding< | |
272 | ::boost::mpl::map< ::boost::mpl::pair<T, U*> > | |
273 | >() | |
274 | )), | |
275 | data(data_arg) | |
276 | {} | |
277 | /** INTERNAL ONLY */ | |
278 | template<class U, class Map> | |
279 | any(U* data_arg, const static_binding<Map>& binding_arg) | |
280 | : table(( | |
281 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
282 | binding_arg | |
283 | )), | |
284 | data(data_arg) | |
285 | { | |
286 | BOOST_MPL_ASSERT((::boost::is_same< | |
287 | typename ::boost::mpl::at<Map, T>::type, U*>)); | |
288 | } | |
289 | /** | |
290 | * Copies an @ref any. | |
291 | * | |
292 | * \param other The object to make a copy of. | |
293 | * | |
294 | * \pre @c Concept must contain @ref constructible "constructible<T(const T&)>". | |
295 | * (This is included in @ref copy_constructible "copy_constructible<T>") | |
296 | * | |
297 | * \throws std::bad_alloc or whatever that the copy | |
298 | * constructor of the contained type throws. | |
299 | */ | |
300 | any(const any& other) | |
301 | : table(other.table), | |
302 | data(::boost::type_erasure::call(constructible<T(const T&)>(), other)) | |
303 | {} | |
304 | /** | |
305 | * Upcasts from an @ref any with stricter requirements to | |
306 | * an @ref any with weaker requirements. | |
307 | * | |
308 | * \param other The object to make a copy of. | |
309 | * | |
310 | * \pre @c Concept must contain @ref constructible<T(const T&)>. | |
311 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
312 | * \pre After substituting @c T for @c Tag2, the requirements of | |
313 | * @c Concept2 must be a superset of the requirements of | |
314 | * @c Concept. | |
315 | * | |
316 | * \throws std::bad_alloc or whatever that the copy | |
317 | * constructor of the contained type throws. | |
318 | */ | |
319 | template<class Concept2, class Tag2> | |
320 | any(const any<Concept2, Tag2>& other) | |
321 | : table( | |
322 | ::boost::type_erasure::detail::access::table(other), | |
323 | ::boost::mpl::map< | |
324 | ::boost::mpl::pair< | |
325 | T, | |
326 | typename ::boost::remove_const< | |
327 | typename ::boost::remove_reference<Tag2>::type | |
328 | >::type | |
329 | > | |
330 | >() | |
331 | ), | |
332 | data(::boost::type_erasure::call( | |
333 | constructible< | |
334 | typename ::boost::remove_const< | |
335 | typename boost::remove_reference<Tag2>::type | |
336 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
337 | >(), other) | |
338 | ) | |
339 | {} | |
340 | /** | |
341 | * Constructs an @ref any from another @ref any. | |
342 | * | |
343 | * \param other The object to make a copy of. | |
344 | * \param binding Specifies the mapping between the placeholders | |
345 | * used by the two concepts. | |
346 | * | |
347 | * \pre @c Concept must contain @ref constructible<T(const T&)>. | |
348 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
349 | * placeholders used by @c Concept and values for the corresponding | |
350 | * placeholders in @c Concept2. | |
351 | * \pre After substituting placeholders according to @c Map, the | |
352 | * requirements of @c Concept2 must be a superset of the | |
353 | * requirements of @c Concept. | |
354 | * | |
355 | * \throws std::bad_alloc or whatever that the copy | |
356 | * constructor of the contained type throws. | |
357 | */ | |
358 | template<class Concept2, class Tag2, class Map> | |
359 | any(const any<Concept2, Tag2>& other, const static_binding<Map>& binding_arg) | |
360 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
361 | data(::boost::type_erasure::call( | |
362 | constructible< | |
363 | typename ::boost::remove_const< | |
364 | typename boost::remove_reference<Tag2>::type | |
365 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
366 | >(), other) | |
367 | ) | |
368 | {} | |
369 | /** | |
370 | * Constructs an @ref any from another @ref any. | |
371 | * | |
372 | * \param other The object to make a copy of. | |
373 | * \param binding Specifies the bindings of placeholders to actual types. | |
374 | * | |
375 | * \pre @c Concept must contain @ref constructible<T(const T&)>. | |
376 | * \pre The type stored in @c other must match the type expected by | |
377 | * @c binding. | |
378 | * | |
379 | * \post binding_of(*this) == @c binding | |
380 | * | |
381 | * \throws std::bad_alloc or whatever that the copy | |
382 | * constructor of the contained type throws. | |
383 | * | |
384 | * \warning This constructor is potentially dangerous, as it cannot | |
385 | * check at compile time whether the arguments match. | |
386 | */ | |
387 | template<class Concept2, class Tag2> | |
388 | any(const any<Concept2, Tag2>& other, const binding<Concept>& binding_arg) | |
389 | : table(binding_arg), | |
390 | data(::boost::type_erasure::call( | |
391 | constructible< | |
392 | typename ::boost::remove_const< | |
393 | typename boost::remove_reference<Tag2>::type | |
394 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
395 | >(), other) | |
396 | ) | |
397 | {} | |
398 | ||
399 | #ifdef BOOST_TYPE_ERASURE_DOXYGEN | |
400 | ||
401 | /** | |
402 | * Calls a constructor of the contained type. The bindings | |
403 | * will be deduced from the arguments. | |
404 | * | |
405 | * \param arg The arguments to be passed to the underlying constructor. | |
406 | * | |
407 | * \pre @c Concept must contain an instance of @ref constructible which | |
408 | * can be called with these arguments. | |
409 | * \pre At least one of the arguments must by an @ref any with the | |
410 | * same @c Concept as this. | |
411 | * \pre The bindings of all the arguments that are @ref any's, must | |
412 | * be the same. | |
413 | * | |
414 | * \throws std::bad_alloc or whatever that the | |
415 | * constructor of the contained type throws. | |
416 | * | |
417 | * \note This constructor is never chosen if any other constructor | |
418 | * can be called instead. | |
419 | */ | |
420 | template<class... U> | |
421 | explicit any(U&&... arg); | |
422 | ||
423 | /** | |
424 | * Calls a constructor of the contained type. | |
425 | * | |
426 | * \param binding Specifies the bindings of placeholders to actual types. | |
427 | * \param arg The arguments to be passed to the underlying constructor. | |
428 | * | |
429 | * \pre @c Concept must contain a matching instance of @ref constructible. | |
430 | * \pre The contained type of every argument that is an @ref any, must | |
431 | * be the same as that specified by @c binding. | |
432 | * | |
433 | * \post binding_of(*this) == @c binding | |
434 | * | |
435 | * \throws std::bad_alloc or whatever that the | |
436 | * constructor of the contained type throws. | |
437 | */ | |
438 | template<class... U> | |
439 | explicit any(const binding<Concept>& binding_arg, U&&... arg) | |
440 | : table(binding_arg), | |
441 | data( | |
442 | ::boost::type_erasure::detail::make( | |
443 | false? this->_boost_type_erasure_deduce_constructor(arg...) : 0 | |
444 | )(arg...) | |
445 | ) | |
446 | {} | |
447 | ||
448 | #else | |
449 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
450 | any(any&& other) | |
451 | : table(::boost::type_erasure::detail::access::table(other)), | |
452 | data(::boost::type_erasure::call( | |
453 | ::boost::type_erasure::detail::make( | |
454 | false? this->_boost_type_erasure_deduce_constructor(std::move(other)) : 0 | |
455 | ), std::move(other)) | |
456 | ) | |
457 | {} | |
458 | any(any& other) | |
459 | : table(::boost::type_erasure::detail::access::table(other)), | |
460 | data(::boost::type_erasure::call( | |
461 | ::boost::type_erasure::detail::make( | |
462 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
463 | ), other) | |
464 | ) | |
465 | {} | |
466 | template<class Concept2, class Tag2> | |
467 | any(any<Concept2, Tag2>& other) | |
468 | : table( | |
469 | ::boost::type_erasure::detail::access::table(other), | |
470 | ::boost::mpl::map< | |
471 | ::boost::mpl::pair< | |
472 | T, | |
473 | typename ::boost::remove_const< | |
474 | typename ::boost::remove_reference<Tag2>::type | |
475 | >::type | |
476 | > | |
477 | >() | |
478 | ), | |
479 | data(::boost::type_erasure::call( | |
480 | ::boost::type_erasure::detail::make( | |
481 | false? other._boost_type_erasure_deduce_constructor(other) : 0 | |
482 | ), other) | |
483 | ) | |
484 | {} | |
485 | template<class Concept2, class Tag2> | |
486 | any(any<Concept2, Tag2>&& other) | |
487 | : table( | |
488 | ::boost::type_erasure::detail::access::table(other), | |
489 | ::boost::mpl::map< | |
490 | ::boost::mpl::pair< | |
491 | T, | |
492 | typename ::boost::remove_const< | |
493 | typename ::boost::remove_reference<Tag2>::type | |
494 | >::type | |
495 | > | |
496 | >() | |
497 | ), | |
498 | data(::boost::type_erasure::call( | |
499 | ::boost::type_erasure::detail::make( | |
500 | false? other._boost_type_erasure_deduce_constructor(std::move(other)) : 0 | |
501 | ), std::move(other)) | |
502 | ) | |
503 | {} | |
504 | #endif | |
505 | // construction from a reference | |
506 | any(const any<Concept, T&>& other) | |
507 | : table(::boost::type_erasure::detail::access::table(other)), | |
508 | data(::boost::type_erasure::call( | |
509 | ::boost::type_erasure::detail::make( | |
510 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
511 | ), other) | |
512 | ) | |
513 | {} | |
514 | any(any<Concept, T&>& other) | |
515 | : table(::boost::type_erasure::detail::access::table(other)), | |
516 | data(::boost::type_erasure::call( | |
517 | ::boost::type_erasure::detail::make( | |
518 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
519 | ), other) | |
520 | ) | |
521 | {} | |
522 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
523 | any(any<Concept, T&>&& other) | |
524 | : table(::boost::type_erasure::detail::access::table(other)), | |
525 | data(::boost::type_erasure::call( | |
526 | ::boost::type_erasure::detail::make( | |
527 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
528 | ), other) | |
529 | ) | |
530 | {} | |
531 | #endif | |
532 | any(const any<Concept, const T&>& other) | |
533 | : table(::boost::type_erasure::detail::access::table(other)), | |
534 | data(::boost::type_erasure::call( | |
535 | ::boost::type_erasure::detail::make( | |
536 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
537 | ), other) | |
538 | ) | |
539 | {} | |
540 | any(any<Concept, const T&>& other) | |
541 | : table(::boost::type_erasure::detail::access::table(other)), | |
542 | data(::boost::type_erasure::call( | |
543 | ::boost::type_erasure::detail::make( | |
544 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
545 | ), other) | |
546 | ) | |
547 | {} | |
548 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
549 | any(any<Concept, const T&>&& other) | |
550 | : table(::boost::type_erasure::detail::access::table(other)), | |
551 | data(::boost::type_erasure::call( | |
552 | ::boost::type_erasure::detail::make( | |
553 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
554 | ), other) | |
555 | ) | |
556 | {} | |
557 | #endif | |
558 | ||
559 | // disambiguating overloads | |
560 | template<class U, class Map> | |
561 | any(U* data_arg, static_binding<Map>& binding_arg) | |
562 | : table(( | |
563 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
564 | binding_arg | |
565 | )), | |
566 | data(data_arg) | |
567 | { | |
568 | BOOST_MPL_ASSERT((::boost::is_same< | |
569 | typename ::boost::mpl::at<Map, T>::type, U*>)); | |
570 | } | |
571 | #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES | |
572 | template<class U, class Map> | |
573 | any(U& data_arg, static_binding<Map>& binding_arg) | |
574 | : table(( | |
575 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
576 | binding_arg | |
577 | )), | |
578 | data(data_arg) | |
579 | { | |
580 | BOOST_MPL_ASSERT((::boost::is_same< | |
581 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
582 | } | |
583 | template<class U, class Map> | |
584 | any(const U& data_arg, static_binding<Map>& binding_arg) | |
585 | : table(( | |
586 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
587 | binding_arg | |
588 | )), | |
589 | data(data_arg) | |
590 | { | |
591 | BOOST_MPL_ASSERT((::boost::is_same< | |
592 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
593 | } | |
594 | template<class U, class Map> | |
595 | any(U& data_arg, const static_binding<Map>& binding_arg) | |
596 | : table(( | |
597 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
598 | binding_arg | |
599 | )), | |
600 | data(data_arg) | |
601 | { | |
602 | BOOST_MPL_ASSERT((::boost::is_same< | |
603 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
604 | } | |
605 | #endif | |
606 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
607 | template<class U, class Map> | |
608 | any(U* data_arg, static_binding<Map>&& binding_arg) | |
609 | : table(( | |
610 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
611 | binding_arg | |
612 | )), | |
613 | data(data_arg) | |
614 | { | |
615 | BOOST_MPL_ASSERT((::boost::is_same< | |
616 | typename ::boost::mpl::at<Map, T>::type, U*>)); | |
617 | } | |
618 | template<class U, class Map> | |
619 | any(U&& data_arg, static_binding<Map>& binding_arg) | |
620 | : table(( | |
621 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
622 | binding_arg | |
623 | )), | |
624 | data(data_arg) | |
625 | { | |
626 | BOOST_MPL_ASSERT((::boost::is_same< | |
627 | typename ::boost::mpl::at<Map, T>::type, typename ::boost::remove_cv<typename ::boost::remove_reference<U>::type>::type>)); | |
628 | } | |
629 | template<class U, class Map> | |
630 | any(U&& data_arg, static_binding<Map>&& binding_arg) | |
631 | : table(( | |
632 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
633 | binding_arg | |
634 | )), | |
635 | data(data_arg) | |
636 | { | |
637 | BOOST_MPL_ASSERT((::boost::is_same< | |
638 | typename ::boost::mpl::at<Map, T>::type, typename ::boost::remove_cv<typename ::boost::remove_reference<U>::type>::type>)); | |
639 | } | |
640 | #endif | |
641 | template<class Concept2, class Tag2, class Map> | |
642 | any(any<Concept2, Tag2>& other, static_binding<Map>& binding_arg) | |
643 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
644 | data(::boost::type_erasure::call( | |
645 | constructible< | |
646 | typename ::boost::remove_const< | |
647 | typename boost::remove_reference<Tag2>::type | |
648 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
649 | >(), other) | |
650 | ) | |
651 | {} | |
652 | template<class Concept2, class Tag2, class Map> | |
653 | any(any<Concept2, Tag2>& other, const static_binding<Map>& binding_arg) | |
654 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
655 | data(::boost::type_erasure::call( | |
656 | constructible< | |
657 | typename ::boost::remove_const< | |
658 | typename boost::remove_reference<Tag2>::type | |
659 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
660 | >(), other) | |
661 | ) | |
662 | {} | |
663 | template<class Concept2, class Tag2, class Map> | |
664 | any(const any<Concept2, Tag2>& other, static_binding<Map>& binding_arg) | |
665 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
666 | data(::boost::type_erasure::call( | |
667 | constructible< | |
668 | typename ::boost::remove_const< | |
669 | typename boost::remove_reference<Tag2>::type | |
670 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
671 | >(), other) | |
672 | ) | |
673 | {} | |
674 | template<class Concept2, class Tag2> | |
675 | any(any<Concept2, Tag2>& other, binding<Concept>& binding_arg) | |
676 | : table(binding_arg), | |
677 | data(::boost::type_erasure::call( | |
678 | constructible< | |
679 | typename ::boost::remove_const< | |
680 | typename boost::remove_reference<Tag2>::type | |
681 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
682 | >(), other) | |
683 | ) | |
684 | {} | |
685 | template<class Concept2, class Tag2> | |
686 | any(any<Concept2, Tag2>& other, const binding<Concept>& binding_arg) | |
687 | : table(binding_arg), | |
688 | data(::boost::type_erasure::call( | |
689 | constructible< | |
690 | typename ::boost::remove_const< | |
691 | typename boost::remove_reference<Tag2>::type | |
692 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
693 | >(), other) | |
694 | ) | |
695 | {} | |
696 | template<class Concept2, class Tag2> | |
697 | any(const any<Concept2, Tag2>& other, binding<Concept>& binding_arg) | |
698 | : table(binding_arg), | |
699 | data(::boost::type_erasure::call( | |
700 | constructible< | |
701 | typename ::boost::remove_const< | |
702 | typename boost::remove_reference<Tag2>::type | |
703 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
704 | >(), other) | |
705 | ) | |
706 | {} | |
707 | ||
708 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
709 | template<class Concept2, class Tag2, class Map> | |
710 | any(any<Concept2, Tag2>& other, static_binding<Map>&& binding_arg) | |
711 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
712 | data(::boost::type_erasure::call( | |
713 | constructible< | |
714 | typename ::boost::remove_const< | |
715 | typename boost::remove_reference<Tag2>::type | |
716 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
717 | >(), other) | |
718 | ) | |
719 | {} | |
720 | template<class Concept2, class Tag2, class Map> | |
721 | any(const any<Concept2, Tag2>& other, static_binding<Map>&& binding_arg) | |
722 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
723 | data(::boost::type_erasure::call( | |
724 | constructible< | |
725 | typename ::boost::remove_const< | |
726 | typename boost::remove_reference<Tag2>::type | |
727 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
728 | >(), other) | |
729 | ) | |
730 | {} | |
731 | template<class Concept2, class Tag2, class Map> | |
732 | any(any<Concept2, Tag2>&& other, static_binding<Map>&& binding_arg) | |
733 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
734 | data(::boost::type_erasure::call( | |
735 | constructible< | |
736 | typename ::boost::remove_const< | |
737 | typename boost::remove_reference<Tag2>::type | |
738 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
739 | >(), std::move(other)) | |
740 | ) | |
741 | {} | |
742 | template<class Concept2, class Tag2, class Map> | |
743 | any(any<Concept2, Tag2>&& other, static_binding<Map>& binding_arg) | |
744 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
745 | data(::boost::type_erasure::call( | |
746 | constructible< | |
747 | typename ::boost::remove_const< | |
748 | typename boost::remove_reference<Tag2>::type | |
749 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
750 | >(), std::move(other)) | |
751 | ) | |
752 | {} | |
753 | template<class Concept2, class Tag2, class Map> | |
754 | any(any<Concept2, Tag2>&& other, const static_binding<Map>& binding_arg) | |
755 | : table(::boost::type_erasure::detail::access::table(other), binding_arg), | |
756 | data(::boost::type_erasure::call( | |
757 | constructible< | |
758 | typename ::boost::remove_const< | |
759 | typename boost::remove_reference<Tag2>::type | |
760 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
761 | >(), std::move(other)) | |
762 | ) | |
763 | {} | |
764 | template<class Concept2, class Tag2> | |
765 | any(any<Concept2, Tag2>& other, binding<Concept>&& binding_arg) | |
766 | : table(binding_arg), | |
767 | data(::boost::type_erasure::call( | |
768 | constructible< | |
769 | typename ::boost::remove_const< | |
770 | typename boost::remove_reference<Tag2>::type | |
771 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
772 | >(), other) | |
773 | ) | |
774 | {} | |
775 | template<class Concept2, class Tag2> | |
776 | any(const any<Concept2, Tag2>& other, binding<Concept>&& binding_arg) | |
777 | : table(binding_arg), | |
778 | data(::boost::type_erasure::call( | |
779 | constructible< | |
780 | typename ::boost::remove_const< | |
781 | typename boost::remove_reference<Tag2>::type | |
782 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
783 | >(), other) | |
784 | ) | |
785 | {} | |
786 | template<class Concept2, class Tag2> | |
787 | any(any<Concept2, Tag2>&& other, binding<Concept>&& binding_arg) | |
788 | : table(binding_arg), | |
789 | data(::boost::type_erasure::call( | |
790 | constructible< | |
791 | typename ::boost::remove_const< | |
792 | typename boost::remove_reference<Tag2>::type | |
793 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
794 | >(), std::move(other)) | |
795 | ) | |
796 | {} | |
797 | template<class Concept2, class Tag2> | |
798 | any(any<Concept2, Tag2>&& other, binding<Concept>& binding_arg) | |
799 | : table(binding_arg), | |
800 | data(::boost::type_erasure::call( | |
801 | constructible< | |
802 | typename ::boost::remove_const< | |
803 | typename boost::remove_reference<Tag2>::type | |
804 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
805 | >(), std::move(other)) | |
806 | ) | |
807 | {} | |
808 | template<class Concept2, class Tag2> | |
809 | any(any<Concept2, Tag2>&& other, const binding<Concept>& binding_arg) | |
810 | : table(binding_arg), | |
811 | data(::boost::type_erasure::call( | |
812 | constructible< | |
813 | typename ::boost::remove_const< | |
814 | typename boost::remove_reference<Tag2>::type | |
815 | >::type(const typename boost::remove_reference<Tag2>::type&) | |
816 | >(), std::move(other)) | |
817 | ) | |
818 | {} | |
819 | #endif | |
820 | ||
821 | // One argument is a special case. The argument must be an any | |
822 | // and the constructor must be explicit. | |
823 | template<class Tag2> | |
824 | explicit any(const any<Concept, Tag2>& other) | |
825 | : table(::boost::type_erasure::detail::access::table(other)), | |
826 | data(::boost::type_erasure::call( | |
827 | ::boost::type_erasure::detail::make( | |
828 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
829 | ), other) | |
830 | ) | |
831 | {} | |
832 | template<class Tag2> | |
833 | explicit any(any<Concept, Tag2>& other) | |
834 | : table(::boost::type_erasure::detail::access::table(other)), | |
835 | data(::boost::type_erasure::call( | |
836 | ::boost::type_erasure::detail::make( | |
837 | false? this->_boost_type_erasure_deduce_constructor(other) : 0 | |
838 | ), other) | |
839 | ) | |
840 | {} | |
841 | ||
842 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
843 | template<class Tag2> | |
844 | explicit any(any<Concept, Tag2>&& other) | |
845 | : table(::boost::type_erasure::detail::access::table(other)), | |
846 | data(::boost::type_erasure::call( | |
847 | ::boost::type_erasure::detail::make( | |
848 | false? this->_boost_type_erasure_deduce_constructor(std::move(other)) : 0 | |
849 | ), std::move(other)) | |
850 | ) | |
851 | {} | |
852 | #endif | |
853 | ||
854 | explicit any(const binding<Concept>& binding_arg) | |
855 | : table(binding_arg), | |
856 | data( | |
857 | ::boost::type_erasure::call( | |
858 | binding_arg, | |
859 | ::boost::type_erasure::constructible<T()>() | |
860 | ) | |
861 | ) | |
862 | {} | |
863 | explicit any(binding<Concept>& binding_arg) | |
864 | : table(binding_arg), | |
865 | data( | |
866 | ::boost::type_erasure::call( | |
867 | binding_arg, | |
868 | ::boost::type_erasure::constructible<T()>() | |
869 | ) | |
870 | ) | |
871 | {} | |
872 | ||
873 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
874 | ||
875 | explicit any(binding<Concept>&& binding_arg) | |
876 | : table(binding_arg), | |
877 | data( | |
878 | ::boost::type_erasure::call( | |
879 | binding_arg, | |
880 | ::boost::type_erasure::constructible<T()>() | |
881 | ) | |
882 | ) | |
883 | {} | |
884 | ||
885 | #endif | |
886 | ||
887 | #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) | |
888 | ||
889 | template<class R, class... A, class... U> | |
890 | const table_type& _boost_type_erasure_extract_table( | |
891 | ::boost::type_erasure::constructible<R(A...)>*, | |
892 | U&&... u) | |
893 | { | |
894 | return *::boost::type_erasure::detail::extract_table(static_cast<void(*)(A...)>(0), u...); | |
895 | } | |
896 | ||
897 | template<class U0, class U1, class... U> | |
898 | any(U0&& u0, U1&& u1, U&&... u) | |
899 | : table( | |
900 | _boost_type_erasure_extract_table( | |
901 | false? this->_boost_type_erasure_deduce_constructor(std::forward<U0>(u0), std::forward<U1>(u1), std::forward<U>(u)...) : 0, | |
902 | std::forward<U0>(u0), std::forward<U1>(u1), std::forward<U>(u)... | |
903 | ) | |
904 | ), | |
905 | data( | |
906 | ::boost::type_erasure::call( | |
907 | ::boost::type_erasure::detail::make( | |
908 | false? this->_boost_type_erasure_deduce_constructor(std::forward<U0>(u0), std::forward<U1>(u1), std::forward<U>(u)...) : 0 | |
909 | ), | |
910 | std::forward<U0>(u0), std::forward<U1>(u1), std::forward<U>(u)... | |
911 | ) | |
912 | ) | |
913 | {} | |
914 | ||
915 | template<class U0, class... U> | |
916 | any(const binding<Concept>& binding_arg, U0&& u0, U&&... u) | |
917 | : table(binding_arg), | |
918 | data( | |
919 | ::boost::type_erasure::call( | |
920 | binding_arg, | |
921 | ::boost::type_erasure::detail::make( | |
922 | false? this->_boost_type_erasure_deduce_constructor(std::forward<U0>(u0), std::forward<U>(u)...) : 0 | |
923 | ), | |
924 | std::forward<U0>(u0), std::forward<U>(u)... | |
925 | ) | |
926 | ) | |
927 | {} | |
928 | ||
929 | // disambiguate | |
930 | template<class U0, class... U> | |
931 | any(binding<Concept>& binding_arg, U0&& u0, U&&... u) | |
932 | : table(binding_arg), | |
933 | data( | |
934 | ::boost::type_erasure::call( | |
935 | binding_arg, | |
936 | ::boost::type_erasure::detail::make( | |
937 | false? this->_boost_type_erasure_deduce_constructor(std::forward<U0>(u0), std::forward<U>(u)...) : 0 | |
938 | ), | |
939 | std::forward<U0>(u0), std::forward<U>(u)... | |
940 | ) | |
941 | ) | |
942 | {} | |
943 | template<class U0, class... U> | |
944 | any(binding<Concept>&& binding_arg, U0&& u0, U&&... u) | |
945 | : table(binding_arg), | |
946 | data( | |
947 | ::boost::type_erasure::call( | |
948 | binding_arg, | |
949 | ::boost::type_erasure::detail::make( | |
950 | false? this->_boost_type_erasure_deduce_constructor(std::forward<U0>(u0), std::forward<U>(u)...) : 0 | |
951 | ), | |
952 | std::forward<U0>(u0), std::forward<U>(u)... | |
953 | ) | |
954 | ) | |
955 | {} | |
956 | ||
957 | #else | |
958 | ||
959 | #include <boost/type_erasure/detail/construct.hpp> | |
960 | ||
961 | #endif | |
962 | ||
963 | #endif | |
964 | ||
965 | /** | |
966 | * Assigns to an @ref any. | |
967 | * | |
968 | * If an appropriate overload of @ref assignable is not available | |
969 | * and @ref relaxed is in @c Concept, falls back on | |
970 | * constructing from @c other. | |
971 | * | |
972 | * \throws Whatever the assignment operator of the contained | |
973 | * type throws. When falling back on construction, | |
974 | * throws @c std::bad_alloc or whatever the copy | |
975 | * constructor of the contained type throws. In | |
976 | * this case assignment provides the strong exception | |
977 | * guarantee. When calling the assignment operator | |
978 | * of the contained type, the exception guarantee is | |
979 | * whatever the contained type provides. | |
980 | */ | |
981 | any& operator=(const any& other) | |
982 | { | |
983 | _boost_type_erasure_resolve_assign(other); | |
984 | return *this; | |
985 | } | |
986 | /** | |
987 | * Assigns to an @ref any. | |
988 | * | |
989 | * If an appropriate overload of @ref assignable is not available | |
990 | * and @ref relaxed is in @c Concept, falls back on | |
991 | * constructing from @c other. | |
992 | * | |
993 | * \throws Whatever the assignment operator of the contained | |
994 | * type throws. When falling back on construction, | |
995 | * throws @c std::bad_alloc or whatever the copy | |
996 | * constructor of the contained type throws. In | |
997 | * this case assignment provides the strong exception | |
998 | * guarantee. When calling an assignment operator | |
999 | * of the contained type, the exception guarantee is | |
1000 | * whatever the contained type provides. | |
1001 | */ | |
1002 | template<class U> | |
1003 | any& operator=(const U& other) | |
1004 | { | |
1005 | _boost_type_erasure_resolve_assign(other); | |
1006 | return *this; | |
1007 | } | |
1008 | /** | |
1009 | * \pre @c Concept includes @ref destructible "destructible<T>". | |
1010 | */ | |
1011 | ~any() | |
1012 | { | |
1013 | table.template find<destructible<T> >()(data); | |
1014 | } | |
1015 | ||
1016 | #ifndef BOOST_NO_FUNCTION_REFERENCE_QUALIFIERS | |
1017 | /** INTERNAL ONLY */ | |
1018 | operator param<Concept, T&>() & { return param<Concept, T&>(data, table); } | |
1019 | /** INTERNAL ONLY */ | |
1020 | operator param<Concept, T&&>() && { return param<Concept, T&&>(data, table); } | |
1021 | #endif | |
1022 | private: | |
1023 | /** INTERNAL ONLY */ | |
1024 | void _boost_type_erasure_swap(any& other) | |
1025 | { | |
1026 | ::std::swap(data, other.data); | |
1027 | ::std::swap(table, other.table); | |
1028 | } | |
1029 | /** INTERNAL ONLY */ | |
1030 | template<class Other> | |
1031 | void _boost_type_erasure_resolve_assign(const Other& other) | |
1032 | { | |
1033 | _boost_type_erasure_assign_impl( | |
1034 | other, | |
1035 | false? this->_boost_type_erasure_deduce_assign( | |
1036 | ::boost::type_erasure::detail::make_fallback( | |
1037 | other, | |
1038 | ::boost::mpl::bool_< | |
1039 | sizeof( | |
1040 | ::boost::type_erasure::detail::check_overload( | |
1041 | ::boost::declval<any&>(). | |
1042 | _boost_type_erasure_deduce_assign(other) | |
1043 | ) | |
1044 | ) == sizeof(::boost::type_erasure::detail::yes) | |
1045 | >() | |
1046 | ) | |
1047 | ) : 0, | |
1048 | ::boost::type_erasure::is_relaxed<Concept>() | |
1049 | ); | |
1050 | } | |
1051 | /** INTERNAL ONLY */ | |
1052 | template<class Other, class U> | |
1053 | void _boost_type_erasure_assign_impl( | |
1054 | const Other& other, | |
1055 | const assignable<T, U>*, | |
1056 | ::boost::mpl::false_) | |
1057 | { | |
1058 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
1059 | } | |
1060 | /** INTERNAL ONLY */ | |
1061 | template<class Other, class U> | |
1062 | void _boost_type_erasure_assign_impl( | |
1063 | const Other& other, | |
1064 | const assignable<T, U>*, | |
1065 | ::boost::mpl::true_) | |
1066 | { | |
1067 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
1068 | } | |
1069 | /** INTERNAL ONLY */ | |
1070 | template<class Other> | |
1071 | void _boost_type_erasure_assign_impl( | |
1072 | const Other& other, | |
1073 | const void*, | |
1074 | ::boost::mpl::true_) | |
1075 | { | |
1076 | any temp(other); | |
1077 | _boost_type_erasure_swap(temp); | |
1078 | } | |
1079 | /** INTERNAL ONLY */ | |
1080 | template<class Concept2, class Tag2> | |
1081 | void _boost_type_erasure_resolve_assign(const any<Concept2, Tag2>& other) | |
1082 | { | |
1083 | _boost_type_erasure_assign_impl( | |
1084 | other, | |
1085 | false? this->_boost_type_erasure_deduce_assign( | |
1086 | ::boost::type_erasure::detail::make_fallback( | |
1087 | other, | |
1088 | ::boost::mpl::bool_< | |
1089 | sizeof( | |
1090 | ::boost::type_erasure::detail::check_overload( | |
1091 | ::boost::declval<any&>(). | |
1092 | _boost_type_erasure_deduce_assign(other) | |
1093 | ) | |
1094 | ) == sizeof(::boost::type_erasure::detail::yes) | |
1095 | >() | |
1096 | ) | |
1097 | ) : 0, | |
1098 | false? this->_boost_type_erasure_deduce_constructor( | |
1099 | ::boost::type_erasure::detail::make_fallback( | |
1100 | other, | |
1101 | ::boost::mpl::bool_< | |
1102 | sizeof( | |
1103 | ::boost::type_erasure::detail::check_overload( | |
1104 | ::boost::declval<any&>(). | |
1105 | _boost_type_erasure_deduce_constructor(other) | |
1106 | ) | |
1107 | ) == sizeof(::boost::type_erasure::detail::yes) | |
1108 | >() | |
1109 | ) | |
1110 | ) : 0, | |
1111 | ::boost::type_erasure::is_relaxed<Concept>() | |
1112 | ); | |
1113 | } | |
1114 | /** INTERNAL ONLY */ | |
1115 | template<class Other, class U> | |
1116 | void _boost_type_erasure_assign_impl( | |
1117 | const Other& other, | |
1118 | const assignable<T, U>*, | |
1119 | const void*, | |
1120 | ::boost::mpl::false_) | |
1121 | { | |
1122 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
1123 | } | |
1124 | /** INTERNAL ONLY */ | |
1125 | template<class Other, class U> | |
1126 | void _boost_type_erasure_assign_impl( | |
1127 | const Other& other, | |
1128 | const assignable<T, U>*, | |
1129 | const void*, | |
1130 | ::boost::mpl::true_) | |
1131 | { | |
1132 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
1133 | } | |
1134 | /** INTERNAL ONLY */ | |
1135 | template<class Other, class Sig> | |
1136 | void _boost_type_erasure_assign_impl( | |
1137 | const Other& other, | |
1138 | const void*, | |
1139 | const constructible<Sig>*, | |
1140 | ::boost::mpl::true_) | |
1141 | { | |
1142 | any temp(other); | |
1143 | _boost_type_erasure_swap(temp); | |
1144 | } | |
1145 | /** INTERNAL ONLY */ | |
1146 | template<class Other, class U, class Sig> | |
1147 | void _boost_type_erasure_assign_impl( | |
1148 | const Other& other, | |
1149 | const assignable<T, U>*, | |
1150 | const constructible<Sig>*, | |
1151 | ::boost::mpl::true_) | |
1152 | { | |
1153 | if(::boost::type_erasure::check_match(assignable<T, U>(), *this, other)) | |
1154 | { | |
1155 | ::boost::type_erasure::unchecked_call(assignable<T, U>(), *this, other); | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | any temp(other); | |
1160 | _boost_type_erasure_swap(temp); | |
1161 | } | |
1162 | } | |
1163 | friend struct ::boost::type_erasure::detail::access; | |
1164 | // The table has to be initialized first for exception | |
1165 | // safety in some constructors. | |
1166 | table_type table; | |
1167 | ::boost::type_erasure::detail::storage data; | |
1168 | }; | |
1169 | ||
1170 | template<class Concept, class T> | |
1171 | class any<Concept, T&> : | |
1172 | public ::boost::type_erasure::detail::compute_bases< | |
1173 | ::boost::type_erasure::any<Concept, T&>, | |
1174 | Concept, | |
1175 | T | |
1176 | >::type | |
1177 | { | |
1178 | typedef ::boost::type_erasure::binding<Concept> table_type; | |
1179 | public: | |
1180 | /** INTERNAL ONLY */ | |
1181 | typedef Concept _boost_type_erasure_concept_type; | |
1182 | /** INTERNAL ONLY */ | |
1183 | any(const ::boost::type_erasure::detail::storage& data_arg, | |
1184 | const table_type& table_arg) | |
1185 | : data(data_arg), | |
1186 | table(table_arg) | |
1187 | {} | |
1188 | /** | |
1189 | * Constructs an @ref any from a reference. | |
1190 | * | |
1191 | * \param arg The object to bind the reference to. | |
1192 | * | |
1193 | * \pre @c U is a model of @c Concept. | |
1194 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1195 | * | |
1196 | * \throws Nothing. | |
1197 | */ | |
1198 | template<class U> | |
1199 | any(U& arg | |
1200 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1201 | , typename ::boost::disable_if< | |
1202 | ::boost::mpl::or_< | |
1203 | ::boost::is_const<U>, | |
1204 | ::boost::type_erasure::detail::is_any<U> | |
1205 | > | |
1206 | >::type* = 0 | |
1207 | #endif | |
1208 | ) | |
1209 | : table(( | |
1210 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, U), | |
1211 | ::boost::type_erasure::make_binding< | |
1212 | ::boost::mpl::map< ::boost::mpl::pair<T, U> > | |
1213 | >() | |
1214 | )) | |
1215 | { | |
1216 | data.data = ::boost::addressof(arg); | |
1217 | } | |
1218 | /** | |
1219 | * Constructs an @ref any from a reference. | |
1220 | * | |
1221 | * \param arg The object to bind the reference to. | |
1222 | * \param binding Specifies the actual types that | |
1223 | * all the placeholders should bind to. | |
1224 | * | |
1225 | * \pre @c U is a model of @c Concept. | |
1226 | * \pre @c Map is an MPL map with an entry for every | |
1227 | * non-deduced placeholder referred to by @c Concept. | |
1228 | * | |
1229 | * \throws Nothing. | |
1230 | */ | |
1231 | template<class U, class Map> | |
1232 | any(U& arg, const static_binding<Map>& binding_arg) | |
1233 | : table(( | |
1234 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
1235 | binding_arg | |
1236 | )) | |
1237 | { | |
1238 | BOOST_MPL_ASSERT((::boost::is_same< | |
1239 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
1240 | data.data = ::boost::addressof(arg); | |
1241 | } | |
1242 | /** | |
1243 | * Constructs an @ref any from another reference. | |
1244 | * | |
1245 | * \param other The reference to copy. | |
1246 | * | |
1247 | * \throws Nothing. | |
1248 | */ | |
1249 | any(const any& other) | |
1250 | : data(other.data), | |
1251 | table(other.table) | |
1252 | {} | |
1253 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1254 | any(any& other) | |
1255 | : data(other.data), | |
1256 | table(other.table) | |
1257 | {} | |
1258 | #endif | |
1259 | /** | |
1260 | * Constructs an @ref any from another @ref any. | |
1261 | * | |
1262 | * \param other The object to bind the reference to. | |
1263 | * | |
1264 | * \throws Nothing. | |
1265 | */ | |
1266 | any(any<Concept, T>& other) | |
1267 | : data(::boost::type_erasure::detail::access::data(other)), | |
1268 | table(::boost::type_erasure::detail::access::table(other)) | |
1269 | {} | |
1270 | /** | |
1271 | * Constructs an @ref any from another reference. | |
1272 | * | |
1273 | * \param other The reference to copy. | |
1274 | * | |
1275 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1276 | * \pre After substituting @c T for @c Tag2, the requirements of | |
1277 | * @c Concept2 must be a superset of the requirements of | |
1278 | * @c Concept. | |
1279 | * | |
1280 | * \throws std::bad_alloc | |
1281 | */ | |
1282 | template<class Concept2, class Tag2> | |
1283 | any(const any<Concept2, Tag2&>& other | |
1284 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1285 | , typename ::boost::disable_if< | |
1286 | ::boost::mpl::or_< | |
1287 | ::boost::is_same<Concept, Concept2>, | |
1288 | ::boost::is_const<Tag2> | |
1289 | > | |
1290 | >::type* = 0 | |
1291 | #endif | |
1292 | ) | |
1293 | : data(::boost::type_erasure::detail::access::data(other)), | |
1294 | table( | |
1295 | ::boost::type_erasure::detail::access::table(other), | |
1296 | ::boost::mpl::map< | |
1297 | ::boost::mpl::pair< | |
1298 | T, | |
1299 | Tag2 | |
1300 | > | |
1301 | >()) | |
1302 | {} | |
1303 | /** | |
1304 | * Constructs an @ref any from another @ref any. | |
1305 | * | |
1306 | * \param other The object to bind the reference to. | |
1307 | * | |
1308 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1309 | * \pre After substituting @c T for @c Tag2, the requirements of | |
1310 | * @c Concept2 must be a superset of the requirements of | |
1311 | * @c Concept. | |
1312 | * | |
1313 | * \throws std::bad_alloc | |
1314 | */ | |
1315 | template<class Concept2, class Tag2> | |
1316 | any(any<Concept2, Tag2>& other | |
1317 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1318 | , typename ::boost::disable_if< | |
1319 | ::boost::mpl::or_< | |
1320 | ::boost::is_same<Concept, Concept2>, | |
1321 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
1322 | > | |
1323 | >::type* = 0 | |
1324 | #endif | |
1325 | ) | |
1326 | : data(::boost::type_erasure::detail::access::data(other)), | |
1327 | table( | |
1328 | ::boost::type_erasure::detail::access::table(other), | |
1329 | ::boost::mpl::map< | |
1330 | ::boost::mpl::pair< | |
1331 | T, | |
1332 | typename ::boost::remove_reference<Tag2>::type | |
1333 | > | |
1334 | >()) | |
1335 | {} | |
1336 | /** | |
1337 | * Constructs an @ref any from another reference. | |
1338 | * | |
1339 | * \param other The reference to copy. | |
1340 | * \param binding Specifies the mapping between the two concepts. | |
1341 | * | |
1342 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
1343 | * placeholders used by @c Concept and values for the corresponding | |
1344 | * placeholders in @c Concept2. | |
1345 | * \pre After substituting placeholders according to @c Map, the | |
1346 | * requirements of @c Concept2 must be a superset of the | |
1347 | * requirements of @c Concept. | |
1348 | * | |
1349 | * \throws std::bad_alloc | |
1350 | */ | |
1351 | template<class Concept2, class Tag2, class Map> | |
1352 | any(const any<Concept2, Tag2&>& other, const static_binding<Map>& binding_arg | |
1353 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1354 | , typename ::boost::disable_if< ::boost::is_const<Tag2> >::type* = 0 | |
1355 | #endif | |
1356 | ) | |
1357 | : data(::boost::type_erasure::detail::access::data(other)), | |
1358 | table(::boost::type_erasure::detail::access::table(other), binding_arg) | |
1359 | {} | |
1360 | /** | |
1361 | * Constructs an @ref any from another @ref any. | |
1362 | * | |
1363 | * \param other The object to bind the reference to. | |
1364 | * \param binding Specifies the mapping between the two concepts. | |
1365 | * | |
1366 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
1367 | * placeholders used by @c Concept and values for the corresponding | |
1368 | * placeholders in @c Concept2. | |
1369 | * \pre After substituting placeholders according to @c Map, the | |
1370 | * requirements of @c Concept2 must be a superset of the | |
1371 | * requirements of @c Concept. | |
1372 | * | |
1373 | * \throws std::bad_alloc | |
1374 | */ | |
1375 | template<class Concept2, class Tag2, class Map> | |
1376 | any(any<Concept2, Tag2>& other, const static_binding<Map>& binding_arg | |
1377 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1378 | , typename ::boost::disable_if< | |
1379 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
1380 | >::type* = 0 | |
1381 | #endif | |
1382 | ) | |
1383 | : data(::boost::type_erasure::detail::access::data(other)), | |
1384 | table(::boost::type_erasure::detail::access::table(other), binding_arg) | |
1385 | {} | |
1386 | /** | |
1387 | * Constructs an @ref any from another reference. | |
1388 | * | |
1389 | * \param other The reference to copy. | |
1390 | * \param binding Specifies the bindings of placeholders to actual types. | |
1391 | * | |
1392 | * \pre The type stored in @c other must match the type expected by | |
1393 | * @c binding. | |
1394 | * | |
1395 | * \post binding_of(*this) == @c binding | |
1396 | * | |
1397 | * \throws Nothing. | |
1398 | */ | |
1399 | template<class Concept2, class Tag2> | |
1400 | any(const any<Concept2, Tag2&>& other, const binding<Concept>& binding_arg | |
1401 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1402 | , typename ::boost::disable_if< | |
1403 | ::boost::is_const<Tag2> | |
1404 | >::type* = 0 | |
1405 | #endif | |
1406 | ) | |
1407 | : data(::boost::type_erasure::detail::access::data(other)), | |
1408 | table(binding_arg) | |
1409 | {} | |
1410 | /** | |
1411 | * Constructs an @ref any from another @ref any. | |
1412 | * | |
1413 | * \param other The object to bind the reference to. | |
1414 | * \param binding Specifies the bindings of placeholders to actual types. | |
1415 | * | |
1416 | * \pre The type stored in @c other must match the type expected by | |
1417 | * @c binding. | |
1418 | * | |
1419 | * \post binding_of(*this) == @c binding | |
1420 | * | |
1421 | * \throws Nothing. | |
1422 | */ | |
1423 | template<class Concept2, class Tag2> | |
1424 | any(any<Concept2, Tag2>& other, const binding<Concept>& binding_arg | |
1425 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1426 | , typename ::boost::disable_if< | |
1427 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
1428 | >::type* = 0 | |
1429 | #endif | |
1430 | ) | |
1431 | : data(::boost::type_erasure::detail::access::data(other)), | |
1432 | table(binding_arg) | |
1433 | {} | |
1434 | ||
1435 | /** | |
1436 | * Assigns to an @ref any. | |
1437 | * | |
1438 | * If an appropriate overload of @ref assignable is not available | |
1439 | * and @ref relaxed is in @c Concept, falls back on | |
1440 | * constructing from @c other. | |
1441 | * | |
1442 | * \throws Whatever the assignment operator of the contained | |
1443 | * type throws. When falling back on construction, | |
1444 | * throws @c std::bad_alloc. In this case assignment | |
1445 | * provides the strong exception guarantee. When | |
1446 | * calling the assignment operator of the contained type, | |
1447 | * the exception guarantee is whatever the contained type provides. | |
1448 | */ | |
1449 | any& operator=(const any& other) | |
1450 | { | |
1451 | _boost_type_erasure_resolve_assign(other); | |
1452 | return *this; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * Assigns to an @ref any. | |
1457 | * | |
1458 | * If an appropriate overload of @ref assignable is not available | |
1459 | * and @ref relaxed is in @c Concept, falls back on | |
1460 | * constructing from @c other. | |
1461 | * | |
1462 | * \throws Whatever the assignment operator of the contained | |
1463 | * type throws. When falling back on construction, | |
1464 | * throws @c std::bad_alloc. In this case assignment | |
1465 | * provides the strong exception guarantee. When | |
1466 | * calling the assignment operator of the contained type, | |
1467 | * the exception guarantee is whatever the contained type provides. | |
1468 | */ | |
1469 | template<class U> | |
1470 | any& operator=(U& other) | |
1471 | { | |
1472 | _boost_type_erasure_resolve_assign(other); | |
1473 | return *this; | |
1474 | } | |
1475 | ||
1476 | /** | |
1477 | * Assigns to an @ref any. | |
1478 | * | |
1479 | * If an appropriate overload of @ref assignable is not available | |
1480 | * and @ref relaxed is in @c Concept, falls back on | |
1481 | * constructing from @c other. | |
1482 | * | |
1483 | * \throws Whatever the assignment operator of the contained | |
1484 | * type throws. When falling back on construction, | |
1485 | * throws @c std::bad_alloc. In this case assignment | |
1486 | * provides the strong exception guarantee. When | |
1487 | * calling the assignment operator of the contained type, | |
1488 | * the exception guarantee is whatever the contained type provides. | |
1489 | */ | |
1490 | template<class U> | |
1491 | any& operator=(const U& other) | |
1492 | { | |
1493 | _boost_type_erasure_resolve_assign(other); | |
1494 | return *this; | |
1495 | } | |
1496 | ||
1497 | #ifndef BOOST_NO_FUNCTION_REFERENCE_QUALIFIERS | |
1498 | /** INTERNAL ONLY */ | |
1499 | operator param<Concept, T&>() const { return param<Concept, T&>(data, table); } | |
1500 | #endif | |
1501 | private: | |
1502 | ||
1503 | /** INTERNAL ONLY */ | |
1504 | void _boost_type_erasure_swap(any& other) | |
1505 | { | |
1506 | ::std::swap(data, other.data); | |
1507 | ::std::swap(table, other.table); | |
1508 | } | |
1509 | /** INTERNAL ONLY */ | |
1510 | template<class Other> | |
1511 | void _boost_type_erasure_resolve_assign(Other& other) | |
1512 | { | |
1513 | _boost_type_erasure_assign_impl( | |
1514 | other, | |
1515 | false? this->_boost_type_erasure_deduce_assign( | |
1516 | ::boost::type_erasure::detail::make_fallback( | |
1517 | other, | |
1518 | ::boost::mpl::bool_< | |
1519 | sizeof( | |
1520 | ::boost::type_erasure::detail::check_overload( | |
1521 | ::boost::declval<any&>(). | |
1522 | _boost_type_erasure_deduce_assign(other) | |
1523 | ) | |
1524 | ) == sizeof(::boost::type_erasure::detail::yes) | |
1525 | >() | |
1526 | ) | |
1527 | ) : 0, | |
1528 | ::boost::type_erasure::is_relaxed<Concept>() | |
1529 | ); | |
1530 | } | |
1531 | /** INTERNAL ONLY */ | |
1532 | template<class Other, class U> | |
1533 | void _boost_type_erasure_assign_impl( | |
1534 | Other& other, | |
1535 | const assignable<T, U>*, | |
1536 | ::boost::mpl::false_) | |
1537 | { | |
1538 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
1539 | } | |
1540 | /** INTERNAL ONLY */ | |
1541 | template<class Other, class U> | |
1542 | void _boost_type_erasure_assign_impl( | |
1543 | Other& other, | |
1544 | const assignable<T, U>*, | |
1545 | ::boost::mpl::true_) | |
1546 | { | |
1547 | if(::boost::type_erasure::check_match(assignable<T, U>(), *this, other)) { | |
1548 | ::boost::type_erasure::unchecked_call(assignable<T, U>(), *this, other); | |
1549 | } else { | |
1550 | any temp(other); | |
1551 | _boost_type_erasure_swap(temp); | |
1552 | } | |
1553 | } | |
1554 | /** INTERNAL ONLY */ | |
1555 | template<class Other> | |
1556 | void _boost_type_erasure_assign_impl( | |
1557 | Other& other, | |
1558 | const void*, | |
1559 | ::boost::mpl::true_) | |
1560 | { | |
1561 | any temp(other); | |
1562 | _boost_type_erasure_swap(temp); | |
1563 | } | |
1564 | ||
1565 | friend struct ::boost::type_erasure::detail::access; | |
1566 | ::boost::type_erasure::detail::storage data; | |
1567 | table_type table; | |
1568 | }; | |
1569 | ||
1570 | #ifdef BOOST_MSVC | |
1571 | #pragma warning(pop) | |
1572 | #endif | |
1573 | ||
1574 | template<class Concept, class T> | |
1575 | class any<Concept, const T&> : | |
1576 | public ::boost::type_erasure::detail::compute_bases< | |
1577 | ::boost::type_erasure::any<Concept, const T&>, | |
1578 | Concept, | |
1579 | T | |
1580 | >::type | |
1581 | { | |
1582 | typedef ::boost::type_erasure::binding<Concept> table_type; | |
1583 | public: | |
1584 | /** INTERNAL ONLY */ | |
1585 | typedef Concept _boost_type_erasure_concept_type; | |
1586 | /** INTERNAL ONLY */ | |
1587 | any(const ::boost::type_erasure::detail::storage& data_arg, | |
1588 | const table_type& table_arg) | |
1589 | : data(data_arg), | |
1590 | table(table_arg) | |
1591 | {} | |
1592 | /** | |
1593 | * Constructs an @ref any from a reference. | |
1594 | * | |
1595 | * \param arg The object to bind the reference to. | |
1596 | * | |
1597 | * \pre @c U is a model of @c Concept. | |
1598 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1599 | * | |
1600 | * \throws Nothing. | |
1601 | */ | |
1602 | template<class U> | |
1603 | any(const U& arg) | |
1604 | : table(( | |
1605 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, U), | |
1606 | ::boost::type_erasure::make_binding< | |
1607 | ::boost::mpl::map< ::boost::mpl::pair<T, U> > | |
1608 | >() | |
1609 | )) | |
1610 | { | |
1611 | data.data = const_cast<void*>(static_cast<const void*>(::boost::addressof(arg))); | |
1612 | } | |
1613 | /** | |
1614 | * Constructs an @ref any from a reference. | |
1615 | * | |
1616 | * \param arg The object to bind the reference to. | |
1617 | * \param binding Specifies the actual types that | |
1618 | * all the placeholders should bind to. | |
1619 | * | |
1620 | * \pre @c U is a model of @c Concept. | |
1621 | * \pre @c Map is an MPL map with an entry for every | |
1622 | * non-deduced placeholder referred to by @c Concept. | |
1623 | * | |
1624 | * \throws Nothing. | |
1625 | */ | |
1626 | template<class U, class Map> | |
1627 | any(const U& arg, const static_binding<Map>& binding_arg) | |
1628 | : table(( | |
1629 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
1630 | binding_arg | |
1631 | )) | |
1632 | { | |
1633 | BOOST_MPL_ASSERT((::boost::is_same< | |
1634 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
1635 | data.data = const_cast<void*>(static_cast<const void*>(::boost::addressof(arg))); | |
1636 | } | |
1637 | /** | |
1638 | * Constructs an @ref any from another @ref any. | |
1639 | * | |
1640 | * \param other The reference to copy. | |
1641 | * | |
1642 | * \throws Nothing. | |
1643 | */ | |
1644 | any(const any& other) | |
1645 | : data(other.data), | |
1646 | table(other.table) | |
1647 | {} | |
1648 | /** | |
1649 | * Constructs an @ref any from another @ref any. | |
1650 | * | |
1651 | * \param other The reference to copy. | |
1652 | * | |
1653 | * \throws Nothing. | |
1654 | */ | |
1655 | any(const any<Concept, T&>& other) | |
1656 | : data(::boost::type_erasure::detail::access::data(other)), | |
1657 | table(::boost::type_erasure::detail::access::table(other)) | |
1658 | {} | |
1659 | /** | |
1660 | * Constructs an @ref any from another @ref any. | |
1661 | * | |
1662 | * \param other The object to bind the reference to. | |
1663 | * | |
1664 | * \throws Nothing. | |
1665 | */ | |
1666 | any(const any<Concept, T>& other) | |
1667 | : data(::boost::type_erasure::detail::access::data(other)), | |
1668 | table(::boost::type_erasure::detail::access::table(other)) | |
1669 | {} | |
1670 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
1671 | /** | |
1672 | * Constructs an @ref any from another @ref any. | |
1673 | * | |
1674 | * \param other The object to bind the reference to. | |
1675 | * | |
1676 | * \throws Nothing. | |
1677 | */ | |
1678 | any(const any<Concept, T&&>& other) | |
1679 | : data(::boost::type_erasure::detail::access::data(other)), | |
1680 | table(::boost::type_erasure::detail::access::table(other)) | |
1681 | {} | |
1682 | #endif | |
1683 | /** | |
1684 | * Constructs an @ref any from another @ref any. | |
1685 | * | |
1686 | * \param other The object to bind the reference to. | |
1687 | * | |
1688 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1689 | * \pre After substituting @c T for @c Tag2, the requirements of | |
1690 | * @c Concept2 must be a superset of the requirements of | |
1691 | * @c Concept. | |
1692 | * | |
1693 | * \throws std::bad_alloc | |
1694 | */ | |
1695 | template<class Concept2, class Tag2> | |
1696 | any(const any<Concept2, Tag2>& other | |
1697 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1698 | , typename ::boost::disable_if< ::boost::is_same<Concept, Concept2> >::type* = 0 | |
1699 | #endif | |
1700 | ) | |
1701 | : data(::boost::type_erasure::detail::access::data(other)), | |
1702 | table( | |
1703 | ::boost::type_erasure::detail::access::table(other), | |
1704 | ::boost::mpl::map< | |
1705 | ::boost::mpl::pair< | |
1706 | T, | |
1707 | typename ::boost::remove_const< | |
1708 | typename ::boost::remove_reference<Tag2>::type | |
1709 | >::type | |
1710 | > | |
1711 | >()) | |
1712 | {} | |
1713 | /** | |
1714 | * Constructs an @ref any from another @ref any. | |
1715 | * | |
1716 | * \param other The object to bind the reference to. | |
1717 | * \param binding Specifies the mapping between the two concepts. | |
1718 | * | |
1719 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
1720 | * placeholders used by @c Concept and values for the corresponding | |
1721 | * placeholders in @c Concept2. | |
1722 | * \pre After substituting placeholders according to @c Map, the | |
1723 | * requirements of @c Concept2 must be a superset of the | |
1724 | * requirements of @c Concept. | |
1725 | * | |
1726 | * \throws std::bad_alloc | |
1727 | */ | |
1728 | template<class Concept2, class Tag2, class Map> | |
1729 | any(const any<Concept2, Tag2>& other, const static_binding<Map>& binding_arg) | |
1730 | : data(::boost::type_erasure::detail::access::data(other)), | |
1731 | table(::boost::type_erasure::detail::access::table(other), binding_arg) | |
1732 | {} | |
1733 | /** | |
1734 | * Constructs an @ref any from another @ref any. | |
1735 | * | |
1736 | * \param other The object to bind the reference to. | |
1737 | * \param binding Specifies the bindings of placeholders to actual types. | |
1738 | * | |
1739 | * \pre The type stored in @c other must match the type expected by | |
1740 | * @c binding. | |
1741 | * | |
1742 | * \post binding_of(*this) == @c binding | |
1743 | * | |
1744 | * \throws Nothing. | |
1745 | */ | |
1746 | template<class Concept2, class Tag2> | |
1747 | any(const any<Concept2, Tag2>& other, const binding<Concept>& binding_arg) | |
1748 | : data(::boost::type_erasure::detail::access::data(other)), | |
1749 | table(binding_arg) | |
1750 | {} | |
1751 | ||
1752 | ||
1753 | /** | |
1754 | * Assigns to an @ref any. | |
1755 | * | |
1756 | * \pre @ref relaxed is in @c Concept. | |
1757 | * | |
1758 | * \throws Nothing. | |
1759 | */ | |
1760 | any& operator=(const any& other) | |
1761 | { | |
1762 | BOOST_MPL_ASSERT((::boost::type_erasure::is_relaxed<Concept>)); | |
1763 | any temp(other); | |
1764 | _boost_type_erasure_swap(temp); | |
1765 | return *this; | |
1766 | } | |
1767 | /** | |
1768 | * Assigns to an @ref any. | |
1769 | * | |
1770 | * \pre @ref relaxed is in @c Concept. | |
1771 | * | |
1772 | * \throws std::bad_alloc. Provides the strong exception guarantee. | |
1773 | */ | |
1774 | template<class U> | |
1775 | any& operator=(const U& other) | |
1776 | { | |
1777 | BOOST_MPL_ASSERT((::boost::type_erasure::is_relaxed<Concept>)); | |
1778 | any temp(other); | |
1779 | _boost_type_erasure_swap(temp); | |
1780 | return *this; | |
1781 | } | |
1782 | ||
1783 | #ifndef BOOST_NO_FUNCTION_REFERENCE_QUALIFIERS | |
1784 | /** INTERNAL ONLY */ | |
1785 | operator param<Concept, const T&>() const { return param<Concept, const T&>(data, table); } | |
1786 | #endif | |
1787 | private: | |
1788 | /** INTERNAL ONLY */ | |
1789 | void _boost_type_erasure_swap(any& other) | |
1790 | { | |
1791 | ::std::swap(data, other.data); | |
1792 | ::std::swap(table, other.table); | |
1793 | } | |
1794 | friend struct ::boost::type_erasure::detail::access; | |
1795 | ::boost::type_erasure::detail::storage data; | |
1796 | table_type table; | |
1797 | }; | |
1798 | ||
1799 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
1800 | ||
1801 | template<class Concept, class T> | |
1802 | class any<Concept, T&&> : | |
1803 | public ::boost::type_erasure::detail::compute_bases< | |
1804 | ::boost::type_erasure::any<Concept, T&&>, | |
1805 | Concept, | |
1806 | T | |
1807 | >::type | |
1808 | { | |
1809 | typedef ::boost::type_erasure::binding<Concept> table_type; | |
1810 | public: | |
1811 | /** INTERNAL ONLY */ | |
1812 | typedef Concept _boost_type_erasure_concept_type; | |
1813 | /** INTERNAL ONLY */ | |
1814 | any(const ::boost::type_erasure::detail::storage& data_arg, | |
1815 | const table_type& table_arg) | |
1816 | : data(data_arg), | |
1817 | table(table_arg) | |
1818 | {} | |
1819 | /** | |
1820 | * Constructs an @ref any from a reference. | |
1821 | * | |
1822 | * \param arg The object to bind the reference to. | |
1823 | * | |
1824 | * \pre @c U is a model of @c Concept. | |
1825 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1826 | * | |
1827 | * \throws Nothing. | |
1828 | */ | |
1829 | template<class U> | |
1830 | any(U&& arg | |
1831 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1832 | , typename ::boost::disable_if< | |
1833 | ::boost::mpl::or_< | |
1834 | ::boost::is_reference<U>, | |
1835 | ::boost::is_const<U>, | |
1836 | ::boost::type_erasure::detail::is_any<U> | |
1837 | > | |
1838 | >::type* = 0 | |
1839 | #endif | |
1840 | ) | |
1841 | : table(( | |
1842 | BOOST_TYPE_ERASURE_INSTANTIATE1(Concept, T, U), | |
1843 | ::boost::type_erasure::make_binding< | |
1844 | ::boost::mpl::map< ::boost::mpl::pair<T, U> > | |
1845 | >() | |
1846 | )) | |
1847 | { | |
1848 | data.data = ::boost::addressof(arg); | |
1849 | } | |
1850 | /** | |
1851 | * Constructs an @ref any from a reference. | |
1852 | * | |
1853 | * \param arg The object to bind the reference to. | |
1854 | * \param binding Specifies the actual types that | |
1855 | * all the placeholders should bind to. | |
1856 | * | |
1857 | * \pre @c U is a model of @c Concept. | |
1858 | * \pre @c Map is an MPL map with an entry for every | |
1859 | * non-deduced placeholder referred to by @c Concept. | |
1860 | * | |
1861 | * \throws Nothing. | |
1862 | */ | |
1863 | template<class U, class Map> | |
1864 | any(U&& arg, const static_binding<Map>& binding_arg) | |
1865 | : table(( | |
1866 | BOOST_TYPE_ERASURE_INSTANTIATE(Concept, Map), | |
1867 | binding_arg | |
1868 | )) | |
1869 | { | |
1870 | BOOST_MPL_ASSERT((::boost::is_same< | |
1871 | typename ::boost::mpl::at<Map, T>::type, U>)); | |
1872 | data.data = ::boost::addressof(arg); | |
1873 | } | |
1874 | /** | |
1875 | * Constructs an @ref any from another rvalue reference. | |
1876 | * | |
1877 | * \param other The reference to copy. | |
1878 | * | |
1879 | * \throws Nothing. | |
1880 | */ | |
1881 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1882 | any(any&& other) | |
1883 | : data(other.data), | |
1884 | table(std::move(other.table)) | |
1885 | {} | |
1886 | any(const any& other) | |
1887 | : data(other.data), | |
1888 | table(other.table) | |
1889 | {} | |
1890 | #endif | |
1891 | /** | |
1892 | * Constructs an @ref any from another @ref any. | |
1893 | * | |
1894 | * \param other The object to bind the reference to. | |
1895 | * | |
1896 | * \throws Nothing. | |
1897 | */ | |
1898 | any(any<Concept, T>&& other) | |
1899 | : data(::boost::type_erasure::detail::access::data(other)), | |
1900 | table(std::move(::boost::type_erasure::detail::access::table(other))) | |
1901 | {} | |
1902 | /** | |
1903 | * Constructs an @ref any from another rvalue reference. | |
1904 | * | |
1905 | * \param other The reference to copy. | |
1906 | * | |
1907 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1908 | * \pre After substituting @c T for @c Tag2, the requirements of | |
1909 | * @c Concept2 must be a superset of the requirements of | |
1910 | * @c Concept. | |
1911 | * | |
1912 | * \throws std::bad_alloc | |
1913 | */ | |
1914 | template<class Concept2, class Tag2> | |
1915 | any(any<Concept2, Tag2&&>&& other | |
1916 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1917 | , typename ::boost::disable_if< | |
1918 | ::boost::mpl::or_< | |
1919 | ::boost::is_reference<Tag2>, | |
1920 | ::boost::is_same<Concept, Concept2>, | |
1921 | ::boost::is_const<Tag2> | |
1922 | > | |
1923 | >::type* = 0 | |
1924 | #endif | |
1925 | ) | |
1926 | : data(::boost::type_erasure::detail::access::data(other)), | |
1927 | table( | |
1928 | std::move(::boost::type_erasure::detail::access::table(other)), | |
1929 | ::boost::mpl::map< | |
1930 | ::boost::mpl::pair< | |
1931 | T, | |
1932 | Tag2 | |
1933 | > | |
1934 | >()) | |
1935 | {} | |
1936 | /** | |
1937 | * Constructs an @ref any from another @ref any. | |
1938 | * | |
1939 | * \param other The object to bind the reference to. | |
1940 | * | |
1941 | * \pre @c Concept must not refer to any non-deduced placeholder besides @c T. | |
1942 | * \pre After substituting @c T for @c Tag2, the requirements of | |
1943 | * @c Concept2 must be a superset of the requirements of | |
1944 | * @c Concept. | |
1945 | * | |
1946 | * \throws std::bad_alloc | |
1947 | */ | |
1948 | template<class Concept2, class Tag2> | |
1949 | any(any<Concept2, Tag2>&& other | |
1950 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1951 | , typename ::boost::disable_if< | |
1952 | ::boost::mpl::or_< | |
1953 | ::boost::is_same<Concept, Concept2>, | |
1954 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
1955 | > | |
1956 | >::type* = 0 | |
1957 | #endif | |
1958 | ) | |
1959 | : data(::boost::type_erasure::detail::access::data(other)), | |
1960 | table( | |
1961 | std::move(::boost::type_erasure::detail::access::table(other)), | |
1962 | ::boost::mpl::map< | |
1963 | ::boost::mpl::pair< | |
1964 | T, | |
1965 | typename ::boost::remove_reference<Tag2>::type | |
1966 | > | |
1967 | >()) | |
1968 | {} | |
1969 | /** | |
1970 | * Constructs an @ref any from another reference. | |
1971 | * | |
1972 | * \param other The reference to copy. | |
1973 | * \param binding Specifies the mapping between the two concepts. | |
1974 | * | |
1975 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
1976 | * placeholders used by @c Concept and values for the corresponding | |
1977 | * placeholders in @c Concept2. | |
1978 | * \pre After substituting placeholders according to @c Map, the | |
1979 | * requirements of @c Concept2 must be a superset of the | |
1980 | * requirements of @c Concept. | |
1981 | * | |
1982 | * \throws std::bad_alloc | |
1983 | */ | |
1984 | template<class Concept2, class Tag2, class Map> | |
1985 | any(const any<Concept2, Tag2&&>& other, const static_binding<Map>& binding_arg | |
1986 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
1987 | , typename ::boost::disable_if< ::boost::is_const<Tag2> >::type* = 0 | |
1988 | #endif | |
1989 | ) | |
1990 | : data(::boost::type_erasure::detail::access::data(other)), | |
1991 | table(std::move(::boost::type_erasure::detail::access::table(other)), binding_arg) | |
1992 | {} | |
1993 | /** | |
1994 | * Constructs an @ref any from another @ref any. | |
1995 | * | |
1996 | * \param other The object to bind the reference to. | |
1997 | * \param binding Specifies the mapping between the two concepts. | |
1998 | * | |
1999 | * \pre @c Map must be an MPL map with keys for all the non-deduced | |
2000 | * placeholders used by @c Concept and values for the corresponding | |
2001 | * placeholders in @c Concept2. | |
2002 | * \pre After substituting placeholders according to @c Map, the | |
2003 | * requirements of @c Concept2 must be a superset of the | |
2004 | * requirements of @c Concept. | |
2005 | * | |
2006 | * \throws std::bad_alloc | |
2007 | */ | |
2008 | template<class Concept2, class Tag2, class Map> | |
2009 | any(any<Concept2, Tag2>&& other, const static_binding<Map>& binding_arg | |
2010 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
2011 | , typename ::boost::disable_if< | |
2012 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
2013 | >::type* = 0 | |
2014 | #endif | |
2015 | ) | |
2016 | : data(::boost::type_erasure::detail::access::data(other)), | |
2017 | table(::boost::type_erasure::detail::access::table(other), binding_arg) | |
2018 | {} | |
2019 | /** | |
2020 | * Constructs an @ref any from another rvalue reference. | |
2021 | * | |
2022 | * \param other The reference to copy. | |
2023 | * \param binding Specifies the bindings of placeholders to actual types. | |
2024 | * | |
2025 | * \pre The type stored in @c other must match the type expected by | |
2026 | * @c binding. | |
2027 | * | |
2028 | * \post binding_of(*this) == @c binding | |
2029 | * | |
2030 | * \throws Nothing. | |
2031 | */ | |
2032 | template<class Concept2, class Tag2> | |
2033 | any(const any<Concept2, Tag2&&>& other, const binding<Concept>& binding_arg | |
2034 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
2035 | , typename ::boost::disable_if< | |
2036 | ::boost::is_const<Tag2> | |
2037 | >::type* = 0 | |
2038 | #endif | |
2039 | ) | |
2040 | : data(::boost::type_erasure::detail::access::data(other)), | |
2041 | table(binding_arg) | |
2042 | {} | |
2043 | /** | |
2044 | * Constructs an @ref any from another @ref any. | |
2045 | * | |
2046 | * \param other The object to bind the reference to. | |
2047 | * \param binding Specifies the bindings of placeholders to actual types. | |
2048 | * | |
2049 | * \pre The type stored in @c other must match the type expected by | |
2050 | * @c binding. | |
2051 | * | |
2052 | * \post binding_of(*this) == @c binding | |
2053 | * | |
2054 | * \throws Nothing. | |
2055 | */ | |
2056 | template<class Concept2, class Tag2> | |
2057 | any(any<Concept2, Tag2>&& other, const binding<Concept>& binding_arg | |
2058 | #ifndef BOOST_TYPE_ERASURE_DOXYGEN | |
2059 | , typename ::boost::disable_if< | |
2060 | ::boost::is_const<typename ::boost::remove_reference<Tag2>::type> | |
2061 | >::type* = 0 | |
2062 | #endif | |
2063 | ) | |
2064 | : data(::boost::type_erasure::detail::access::data(other)), | |
2065 | table(binding_arg) | |
2066 | {} | |
2067 | ||
2068 | /** | |
2069 | * Assigns to an @ref any. | |
2070 | * | |
2071 | * If an appropriate overload of @ref assignable is not available | |
2072 | * and @ref relaxed is in @c Concept, falls back on | |
2073 | * constructing from @c other. | |
2074 | * | |
2075 | * \throws Whatever the assignment operator of the contained | |
2076 | * type throws. When falling back on construction, | |
2077 | * throws @c std::bad_alloc. In this case assignment | |
2078 | * provides the strong exception guarantee. When | |
2079 | * calling the assignment operator of the contained type, | |
2080 | * the exception guarantee is whatever the contained type provides. | |
2081 | */ | |
2082 | any& operator=(const any& other) | |
2083 | { | |
2084 | _boost_type_erasure_resolve_assign(other); | |
2085 | return *this; | |
2086 | } | |
2087 | ||
2088 | /** | |
2089 | * Assigns to an @ref any. | |
2090 | * | |
2091 | * If an appropriate overload of @ref assignable is not available | |
2092 | * and @ref relaxed is in @c Concept, falls back on | |
2093 | * constructing from @c other. | |
2094 | * | |
2095 | * \throws Whatever the assignment operator of the contained | |
2096 | * type throws. When falling back on construction, | |
2097 | * throws @c std::bad_alloc. In this case assignment | |
2098 | * provides the strong exception guarantee. When | |
2099 | * calling the assignment operator of the contained type, | |
2100 | * the exception guarantee is whatever the contained type provides. | |
2101 | */ | |
2102 | template<class U> | |
2103 | any& operator=(U& other) | |
2104 | { | |
2105 | _boost_type_erasure_resolve_assign(other); | |
2106 | return *this; | |
2107 | } | |
2108 | ||
2109 | /** | |
2110 | * Assigns to an @ref any. | |
2111 | * | |
2112 | * If an appropriate overload of @ref assignable is not available | |
2113 | * and @ref relaxed is in @c Concept, falls back on | |
2114 | * constructing from @c other. | |
2115 | * | |
2116 | * \throws Whatever the assignment operator of the contained | |
2117 | * type throws. When falling back on construction, | |
2118 | * throws @c std::bad_alloc. In this case assignment | |
2119 | * provides the strong exception guarantee. When | |
2120 | * calling the assignment operator of the contained type, | |
2121 | * the exception guarantee is whatever the contained type provides. | |
2122 | */ | |
2123 | template<class U> | |
2124 | any& operator=(const U& other) | |
2125 | { | |
2126 | _boost_type_erasure_resolve_assign(other); | |
2127 | return *this; | |
2128 | } | |
2129 | ||
2130 | #ifndef BOOST_NO_FUNCTION_REFERENCE_QUALIFIERS | |
2131 | /** INTERNAL ONLY */ | |
2132 | operator param<Concept, T&&>() const { return param<Concept, T&&>(data, table); } | |
2133 | #endif | |
2134 | private: | |
2135 | ||
2136 | /** INTERNAL ONLY */ | |
2137 | void _boost_type_erasure_swap(any& other) | |
2138 | { | |
2139 | ::std::swap(data, other.data); | |
2140 | ::std::swap(table, other.table); | |
2141 | } | |
2142 | /** INTERNAL ONLY */ | |
2143 | template<class Other> | |
2144 | void _boost_type_erasure_resolve_assign(Other& other) | |
2145 | { | |
2146 | _boost_type_erasure_assign_impl( | |
2147 | other, | |
2148 | false? this->_boost_type_erasure_deduce_assign( | |
2149 | ::boost::type_erasure::detail::make_fallback( | |
2150 | other, | |
2151 | ::boost::mpl::bool_< | |
2152 | sizeof( | |
2153 | ::boost::type_erasure::detail::check_overload( | |
2154 | ::boost::declval<any&>(). | |
2155 | _boost_type_erasure_deduce_assign(other) | |
2156 | ) | |
2157 | ) == sizeof(::boost::type_erasure::detail::yes) | |
2158 | >() | |
2159 | ) | |
2160 | ) : 0, | |
2161 | ::boost::type_erasure::is_relaxed<Concept>() | |
2162 | ); | |
2163 | } | |
2164 | /** INTERNAL ONLY */ | |
2165 | template<class Other, class U> | |
2166 | void _boost_type_erasure_assign_impl( | |
2167 | Other& other, | |
2168 | const assignable<T, U>*, | |
2169 | ::boost::mpl::false_) | |
2170 | { | |
2171 | ::boost::type_erasure::call(assignable<T, U>(), *this, other); | |
2172 | } | |
2173 | /** INTERNAL ONLY */ | |
2174 | template<class Other, class U> | |
2175 | void _boost_type_erasure_assign_impl( | |
2176 | Other& other, | |
2177 | const assignable<T, U>*, | |
2178 | ::boost::mpl::true_) | |
2179 | { | |
2180 | if(::boost::type_erasure::check_match(assignable<T, U>(), *this, other)) { | |
2181 | ::boost::type_erasure::unchecked_call(assignable<T, U>(), *this, other); | |
2182 | } else { | |
2183 | any temp(other); | |
2184 | _boost_type_erasure_swap(temp); | |
2185 | } | |
2186 | } | |
2187 | /** INTERNAL ONLY */ | |
2188 | template<class Other> | |
2189 | void _boost_type_erasure_assign_impl( | |
2190 | Other& other, | |
2191 | const void*, | |
2192 | ::boost::mpl::true_) | |
2193 | { | |
2194 | any temp(other); | |
2195 | _boost_type_erasure_swap(temp); | |
2196 | } | |
2197 | ||
2198 | friend struct ::boost::type_erasure::detail::access; | |
2199 | ::boost::type_erasure::detail::storage data; | |
2200 | table_type table; | |
2201 | }; | |
2202 | ||
2203 | #endif | |
2204 | ||
2205 | } | |
2206 | } | |
2207 | ||
2208 | #endif |