1 | // |
2 | // (C) Copyright Jeremy Siek 2000. |
3 | // Distributed under the Boost Software License, Version 1.0. (See |
4 | // accompanying file LICENSE_1_0.txt or copy at |
5 | // http://www.boost.org/LICENSE_1_0.txt) |
6 | // |
7 | // Revision History: |
8 | // |
9 | // 17 July 2001: Added const to some member functions. (Jeremy Siek) |
10 | // 05 May 2001: Removed static dummy_cons object. (Jeremy Siek) |
11 | |
12 | // See http://www.boost.org/libs/concept_check for documentation. |
13 | |
14 | #ifndef BOOST_CONCEPT_ARCHETYPES_HPP |
15 | #define BOOST_CONCEPT_ARCHETYPES_HPP |
16 | |
17 | #include <boost/config.hpp> |
18 | #include <boost/iterator.hpp> |
19 | #include <boost/mpl/identity.hpp> |
20 | #include <functional> |
21 | |
22 | namespace boost { |
23 | |
24 | //=========================================================================== |
25 | // Basic Archetype Classes |
26 | |
27 | namespace detail { |
28 | class dummy_constructor { }; |
29 | } |
30 | |
31 | // A type that models no concept. The template parameter |
32 | // is only there so that null_archetype types can be created |
33 | // that have different type. |
34 | template <class T = int> |
35 | class null_archetype { |
36 | private: |
37 | null_archetype() { } |
38 | null_archetype(const null_archetype&) { } |
39 | null_archetype& operator=(const null_archetype&) { return *this; } |
40 | public: |
41 | null_archetype(detail::dummy_constructor) { } |
42 | #ifndef __MWERKS__ |
43 | template <class TT> |
44 | friend void dummy_friend(); // just to avoid warnings |
45 | #endif |
46 | }; |
47 | |
48 | // This is a helper class that provides a way to get a reference to |
49 | // an object. The get() function will never be called at run-time |
50 | // (nothing in this file will) so this seemingly very bad function |
51 | // is really quite innocent. The name of this class needs to be |
52 | // changed. |
53 | template <class T> |
54 | class static_object |
55 | { |
56 | public: |
57 | static T& get() |
58 | { |
59 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) |
60 | return *reinterpret_cast<T*>(0); |
61 | #else |
62 | static char d[sizeof(T)]; |
63 | return *reinterpret_cast<T*>(d); |
64 | #endif |
65 | } |
66 | }; |
67 | |
68 | template <class Base = null_archetype<> > |
69 | class default_constructible_archetype : public Base { |
70 | public: |
71 | default_constructible_archetype() |
72 | : Base(static_object<detail::dummy_constructor>::get()) { } |
73 | default_constructible_archetype(detail::dummy_constructor x) : Base(x) { } |
74 | }; |
75 | |
76 | template <class Base = null_archetype<> > |
77 | class assignable_archetype : public Base { |
78 | assignable_archetype() { } |
79 | assignable_archetype(const assignable_archetype&) { } |
80 | public: |
81 | assignable_archetype& operator=(const assignable_archetype&) { |
82 | return *this; |
83 | } |
84 | assignable_archetype(detail::dummy_constructor x) : Base(x) { } |
85 | }; |
86 | |
87 | template <class Base = null_archetype<> > |
88 | class copy_constructible_archetype : public Base { |
89 | public: |
90 | copy_constructible_archetype() |
91 | : Base(static_object<detail::dummy_constructor>::get()) { } |
92 | copy_constructible_archetype(const copy_constructible_archetype&) |
93 | : Base(static_object<detail::dummy_constructor>::get()) { } |
94 | copy_constructible_archetype(detail::dummy_constructor x) : Base(x) { } |
95 | }; |
96 | |
97 | template <class Base = null_archetype<> > |
98 | class sgi_assignable_archetype : public Base { |
99 | public: |
100 | sgi_assignable_archetype(const sgi_assignable_archetype&) |
101 | : Base(static_object<detail::dummy_constructor>::get()) { } |
102 | sgi_assignable_archetype& operator=(const sgi_assignable_archetype&) { |
103 | return *this; |
104 | } |
105 | sgi_assignable_archetype(const detail::dummy_constructor& x) : Base(x) { } |
106 | }; |
107 | |
108 | struct default_archetype_base { |
109 | default_archetype_base(detail::dummy_constructor) { } |
110 | }; |
111 | |
112 | // Careful, don't use same type for T and Base. That results in the |
113 | // conversion operator being invalid. Since T is often |
114 | // null_archetype, can't use null_archetype for Base. |
115 | template <class T, class Base = default_archetype_base> |
116 | class convertible_to_archetype : public Base { |
117 | private: |
118 | convertible_to_archetype() { } |
119 | convertible_to_archetype(const convertible_to_archetype& ) { } |
120 | convertible_to_archetype& operator=(const convertible_to_archetype&) |
121 | { return *this; } |
122 | public: |
123 | convertible_to_archetype(detail::dummy_constructor x) : Base(x) { } |
124 | operator const T&() const { return static_object<T>::get(); } |
125 | }; |
126 | |
127 | template <class T, class Base = default_archetype_base> |
128 | class convertible_from_archetype : public Base { |
129 | private: |
130 | convertible_from_archetype() { } |
131 | convertible_from_archetype(const convertible_from_archetype& ) { } |
132 | convertible_from_archetype& operator=(const convertible_from_archetype&) |
133 | { return *this; } |
134 | public: |
135 | convertible_from_archetype(detail::dummy_constructor x) : Base(x) { } |
136 | convertible_from_archetype(const T&) { } |
137 | convertible_from_archetype& operator=(const T&) |
138 | { return *this; } |
139 | }; |
140 | |
141 | class boolean_archetype { |
142 | public: |
143 | boolean_archetype(const boolean_archetype&) { } |
144 | operator bool() const { return true; } |
145 | boolean_archetype(detail::dummy_constructor) { } |
146 | private: |
147 | boolean_archetype() { } |
148 | boolean_archetype& operator=(const boolean_archetype&) { return *this; } |
149 | }; |
150 | |
151 | template <class Base = null_archetype<> > |
152 | class equality_comparable_archetype : public Base { |
153 | public: |
154 | equality_comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
155 | }; |
156 | template <class Base> |
157 | boolean_archetype |
158 | operator==(const equality_comparable_archetype<Base>&, |
159 | const equality_comparable_archetype<Base>&) |
160 | { |
161 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
162 | } |
163 | template <class Base> |
164 | boolean_archetype |
165 | operator!=(const equality_comparable_archetype<Base>&, |
166 | const equality_comparable_archetype<Base>&) |
167 | { |
168 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
169 | } |
170 | |
171 | |
172 | template <class Base = null_archetype<> > |
173 | class equality_comparable2_first_archetype : public Base { |
174 | public: |
175 | equality_comparable2_first_archetype(detail::dummy_constructor x) |
176 | : Base(x) { } |
177 | }; |
178 | template <class Base = null_archetype<> > |
179 | class equality_comparable2_second_archetype : public Base { |
180 | public: |
181 | equality_comparable2_second_archetype(detail::dummy_constructor x) |
182 | : Base(x) { } |
183 | }; |
184 | template <class Base1, class Base2> |
185 | boolean_archetype |
186 | operator==(const equality_comparable2_first_archetype<Base1>&, |
187 | const equality_comparable2_second_archetype<Base2>&) |
188 | { |
189 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
190 | } |
191 | template <class Base1, class Base2> |
192 | boolean_archetype |
193 | operator!=(const equality_comparable2_first_archetype<Base1>&, |
194 | const equality_comparable2_second_archetype<Base2>&) |
195 | { |
196 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
197 | } |
198 | |
199 | |
200 | template <class Base = null_archetype<> > |
201 | class less_than_comparable_archetype : public Base { |
202 | public: |
203 | less_than_comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
204 | }; |
205 | template <class Base> |
206 | boolean_archetype |
207 | operator<(const less_than_comparable_archetype<Base>&, |
208 | const less_than_comparable_archetype<Base>&) |
209 | { |
210 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
211 | } |
212 | |
213 | |
214 | |
215 | template <class Base = null_archetype<> > |
216 | class comparable_archetype : public Base { |
217 | public: |
218 | comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
219 | }; |
220 | template <class Base> |
221 | boolean_archetype |
222 | operator<(const comparable_archetype<Base>&, |
223 | const comparable_archetype<Base>&) |
224 | { |
225 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
226 | } |
227 | template <class Base> |
228 | boolean_archetype |
229 | operator<=(const comparable_archetype<Base>&, |
230 | const comparable_archetype<Base>&) |
231 | { |
232 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
233 | } |
234 | template <class Base> |
235 | boolean_archetype |
236 | operator>(const comparable_archetype<Base>&, |
237 | const comparable_archetype<Base>&) |
238 | { |
239 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
240 | } |
241 | template <class Base> |
242 | boolean_archetype |
243 | operator>=(const comparable_archetype<Base>&, |
244 | const comparable_archetype<Base>&) |
245 | { |
246 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
247 | } |
248 | |
249 | |
250 | // The purpose of the optags is so that one can specify |
251 | // exactly which types the operator< is defined between. |
252 | // This is useful for allowing the operations: |
253 | // |
254 | // A a; B b; |
255 | // a < b |
256 | // b < a |
257 | // |
258 | // without also allowing the combinations: |
259 | // |
260 | // a < a |
261 | // b < b |
262 | // |
263 | struct optag1 { }; |
264 | struct optag2 { }; |
265 | struct optag3 { }; |
266 | |
267 | #define BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(OP, NAME) \ |
268 | template <class Base = null_archetype<>, class Tag = optag1 > \ |
269 | class NAME##_first_archetype : public Base { \ |
270 | public: \ |
271 | NAME##_first_archetype(detail::dummy_constructor x) : Base(x) { } \ |
272 | }; \ |
273 | \ |
274 | template <class Base = null_archetype<>, class Tag = optag1 > \ |
275 | class NAME##_second_archetype : public Base { \ |
276 | public: \ |
277 | NAME##_second_archetype(detail::dummy_constructor x) : Base(x) { } \ |
278 | }; \ |
279 | \ |
280 | template <class BaseFirst, class BaseSecond, class Tag> \ |
281 | boolean_archetype \ |
282 | operator OP (const NAME##_first_archetype<BaseFirst, Tag>&, \ |
283 | const NAME##_second_archetype<BaseSecond, Tag>&) \ |
284 | { \ |
285 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); \ |
286 | } |
287 | |
288 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(==, equal_op) |
289 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(!=, not_equal_op) |
290 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(<, less_than_op) |
291 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(<=, less_equal_op) |
292 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(>, greater_than_op) |
293 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(>=, greater_equal_op) |
294 | |
295 | #define BOOST_DEFINE_OPERATOR_ARCHETYPE(OP, NAME) \ |
296 | template <class Base = null_archetype<> > \ |
297 | class NAME##_archetype : public Base { \ |
298 | public: \ |
299 | NAME##_archetype(detail::dummy_constructor x) : Base(x) { } \ |
300 | NAME##_archetype(const NAME##_archetype&) \ |
301 | : Base(static_object<detail::dummy_constructor>::get()) { } \ |
302 | NAME##_archetype& operator=(const NAME##_archetype&) { return *this; } \ |
303 | }; \ |
304 | template <class Base> \ |
305 | NAME##_archetype<Base> \ |
306 | operator OP (const NAME##_archetype<Base>&,\ |
307 | const NAME##_archetype<Base>&) \ |
308 | { \ |
309 | return \ |
310 | NAME##_archetype<Base>(static_object<detail::dummy_constructor>::get()); \ |
311 | } |
312 | |
313 | BOOST_DEFINE_OPERATOR_ARCHETYPE(+, addable) |
314 | BOOST_DEFINE_OPERATOR_ARCHETYPE(-, subtractable) |
315 | BOOST_DEFINE_OPERATOR_ARCHETYPE(*, multipliable) |
316 | BOOST_DEFINE_OPERATOR_ARCHETYPE(/, dividable) |
317 | BOOST_DEFINE_OPERATOR_ARCHETYPE(%, modable) |
318 | |
319 | // As is, these are useless because of the return type. |
320 | // Need to invent a better way... |
321 | #define BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(OP, NAME) \ |
322 | template <class Return, class Base = null_archetype<> > \ |
323 | class NAME##_first_archetype : public Base { \ |
324 | public: \ |
325 | NAME##_first_archetype(detail::dummy_constructor x) : Base(x) { } \ |
326 | }; \ |
327 | \ |
328 | template <class Return, class Base = null_archetype<> > \ |
329 | class NAME##_second_archetype : public Base { \ |
330 | public: \ |
331 | NAME##_second_archetype(detail::dummy_constructor x) : Base(x) { } \ |
332 | }; \ |
333 | \ |
334 | template <class Return, class BaseFirst, class BaseSecond> \ |
335 | Return \ |
336 | operator OP (const NAME##_first_archetype<Return, BaseFirst>&, \ |
337 | const NAME##_second_archetype<Return, BaseSecond>&) \ |
338 | { \ |
339 | return Return(static_object<detail::dummy_constructor>::get()); \ |
340 | } |
341 | |
342 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(+, plus_op) |
343 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(*, time_op) |
344 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(/, divide_op) |
345 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(-, subtract_op) |
346 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(%, mod_op) |
347 | |
348 | //=========================================================================== |
349 | // Function Object Archetype Classes |
350 | |
351 | template <class Return> |
352 | class generator_archetype { |
353 | public: |
354 | const Return& operator()() { |
355 | return static_object<Return>::get(); |
356 | } |
357 | }; |
358 | |
359 | class void_generator_archetype { |
360 | public: |
361 | void operator()() { } |
362 | }; |
363 | |
364 | template <class Arg, class Return> |
365 | class unary_function_archetype { |
366 | private: |
367 | unary_function_archetype() { } |
368 | public: |
369 | unary_function_archetype(detail::dummy_constructor) { } |
370 | const Return& operator()(const Arg&) const { |
371 | return static_object<Return>::get(); |
372 | } |
373 | }; |
374 | |
375 | template <class Arg1, class Arg2, class Return> |
376 | class binary_function_archetype { |
377 | private: |
378 | binary_function_archetype() { } |
379 | public: |
380 | binary_function_archetype(detail::dummy_constructor) { } |
381 | const Return& operator()(const Arg1&, const Arg2&) const { |
382 | return static_object<Return>::get(); |
383 | } |
384 | }; |
385 | |
386 | template <class Arg> |
387 | class unary_predicate_archetype { |
388 | typedef boolean_archetype Return; |
389 | unary_predicate_archetype() { } |
390 | public: |
391 | unary_predicate_archetype(detail::dummy_constructor) { } |
392 | const Return& operator()(const Arg&) const { |
393 | return static_object<Return>::get(); |
394 | } |
395 | }; |
396 | |
397 | template <class Arg1, class Arg2, class Base = null_archetype<> > |
398 | class binary_predicate_archetype { |
399 | typedef boolean_archetype Return; |
400 | binary_predicate_archetype() { } |
401 | public: |
402 | binary_predicate_archetype(detail::dummy_constructor) { } |
403 | const Return& operator()(const Arg1&, const Arg2&) const { |
404 | return static_object<Return>::get(); |
405 | } |
406 | }; |
407 | |
408 | //=========================================================================== |
409 | // Iterator Archetype Classes |
410 | |
411 | template <class T, int I = 0> |
412 | class input_iterator_archetype |
413 | { |
414 | private: |
415 | typedef input_iterator_archetype self; |
416 | public: |
417 | typedef std::input_iterator_tag iterator_category; |
418 | typedef T value_type; |
419 | struct reference { |
420 | operator const value_type&() const { return static_object<T>::get(); } |
421 | }; |
422 | typedef const T* pointer; |
423 | typedef std::ptrdiff_t difference_type; |
424 | self& operator=(const self&) { return *this; } |
425 | bool operator==(const self&) const { return true; } |
426 | bool operator!=(const self&) const { return true; } |
427 | reference operator*() const { return reference(); } |
428 | self& operator++() { return *this; } |
429 | self operator++(int) { return *this; } |
430 | }; |
431 | |
432 | template <class T> |
433 | class input_iterator_archetype_no_proxy |
434 | { |
435 | private: |
436 | typedef input_iterator_archetype_no_proxy self; |
437 | public: |
438 | typedef std::input_iterator_tag iterator_category; |
439 | typedef T value_type; |
440 | typedef const T& reference; |
441 | typedef const T* pointer; |
442 | typedef std::ptrdiff_t difference_type; |
443 | self& operator=(const self&) { return *this; } |
444 | bool operator==(const self&) const { return true; } |
445 | bool operator!=(const self&) const { return true; } |
446 | reference operator*() const { return static_object<T>::get(); } |
447 | self& operator++() { return *this; } |
448 | self operator++(int) { return *this; } |
449 | }; |
450 | |
451 | template <class T> |
452 | struct output_proxy { |
453 | output_proxy& operator=(const T&) { return *this; } |
454 | }; |
455 | |
456 | template <class T> |
457 | class output_iterator_archetype |
458 | { |
459 | public: |
460 | typedef output_iterator_archetype self; |
461 | public: |
462 | typedef std::output_iterator_tag iterator_category; |
463 | typedef output_proxy<T> value_type; |
464 | typedef output_proxy<T> reference; |
465 | typedef void pointer; |
466 | typedef void difference_type; |
467 | output_iterator_archetype(detail::dummy_constructor) { } |
468 | output_iterator_archetype(const self&) { } |
469 | self& operator=(const self&) { return *this; } |
470 | bool operator==(const self&) const { return true; } |
471 | bool operator!=(const self&) const { return true; } |
472 | reference operator*() const { return output_proxy<T>(); } |
473 | self& operator++() { return *this; } |
474 | self operator++(int) { return *this; } |
475 | private: |
476 | output_iterator_archetype() { } |
477 | }; |
478 | |
479 | template <class T> |
480 | class input_output_iterator_archetype |
481 | { |
482 | private: |
483 | typedef input_output_iterator_archetype self; |
484 | struct in_out_tag : public std::input_iterator_tag, public std::output_iterator_tag { }; |
485 | public: |
486 | typedef in_out_tag iterator_category; |
487 | typedef T value_type; |
488 | struct reference { |
489 | reference& operator=(const T&) { return *this; } |
490 | operator value_type() { return static_object<T>::get(); } |
491 | }; |
492 | typedef const T* pointer; |
493 | typedef std::ptrdiff_t difference_type; |
494 | input_output_iterator_archetype() { } |
495 | self& operator=(const self&) { return *this; } |
496 | bool operator==(const self&) const { return true; } |
497 | bool operator!=(const self&) const { return true; } |
498 | reference operator*() const { return reference(); } |
499 | self& operator++() { return *this; } |
500 | self operator++(int) { return *this; } |
501 | }; |
502 | |
503 | template <class T> |
504 | class forward_iterator_archetype |
505 | { |
506 | public: |
507 | typedef forward_iterator_archetype self; |
508 | public: |
509 | typedef std::forward_iterator_tag iterator_category; |
510 | typedef T value_type; |
511 | typedef const T& reference; |
512 | typedef T const* pointer; |
513 | typedef std::ptrdiff_t difference_type; |
514 | forward_iterator_archetype() { } |
515 | self& operator=(const self&) { return *this; } |
516 | bool operator==(const self&) const { return true; } |
517 | bool operator!=(const self&) const { return true; } |
518 | reference operator*() const { return static_object<T>::get(); } |
519 | self& operator++() { return *this; } |
520 | self operator++(int) { return *this; } |
521 | }; |
522 | |
523 | template <class T> |
524 | class mutable_forward_iterator_archetype |
525 | { |
526 | public: |
527 | typedef mutable_forward_iterator_archetype self; |
528 | public: |
529 | typedef std::forward_iterator_tag iterator_category; |
530 | typedef T value_type; |
531 | typedef T& reference; |
532 | typedef T* pointer; |
533 | typedef std::ptrdiff_t difference_type; |
534 | mutable_forward_iterator_archetype() { } |
535 | self& operator=(const self&) { return *this; } |
536 | bool operator==(const self&) const { return true; } |
537 | bool operator!=(const self&) const { return true; } |
538 | reference operator*() const { return static_object<T>::get(); } |
539 | self& operator++() { return *this; } |
540 | self operator++(int) { return *this; } |
541 | }; |
542 | |
543 | template <class T> |
544 | class bidirectional_iterator_archetype |
545 | { |
546 | public: |
547 | typedef bidirectional_iterator_archetype self; |
548 | public: |
549 | typedef std::bidirectional_iterator_tag iterator_category; |
550 | typedef T value_type; |
551 | typedef const T& reference; |
552 | typedef T* pointer; |
553 | typedef std::ptrdiff_t difference_type; |
554 | bidirectional_iterator_archetype() { } |
555 | self& operator=(const self&) { return *this; } |
556 | bool operator==(const self&) const { return true; } |
557 | bool operator!=(const self&) const { return true; } |
558 | reference operator*() const { return static_object<T>::get(); } |
559 | self& operator++() { return *this; } |
560 | self operator++(int) { return *this; } |
561 | self& operator--() { return *this; } |
562 | self operator--(int) { return *this; } |
563 | }; |
564 | |
565 | template <class T> |
566 | class mutable_bidirectional_iterator_archetype |
567 | { |
568 | public: |
569 | typedef mutable_bidirectional_iterator_archetype self; |
570 | public: |
571 | typedef std::bidirectional_iterator_tag iterator_category; |
572 | typedef T value_type; |
573 | typedef T& reference; |
574 | typedef T* pointer; |
575 | typedef std::ptrdiff_t difference_type; |
576 | mutable_bidirectional_iterator_archetype() { } |
577 | self& operator=(const self&) { return *this; } |
578 | bool operator==(const self&) const { return true; } |
579 | bool operator!=(const self&) const { return true; } |
580 | reference operator*() const { return static_object<T>::get(); } |
581 | self& operator++() { return *this; } |
582 | self operator++(int) { return *this; } |
583 | self& operator--() { return *this; } |
584 | self operator--(int) { return *this; } |
585 | }; |
586 | |
587 | template <class T> |
588 | class random_access_iterator_archetype |
589 | { |
590 | public: |
591 | typedef random_access_iterator_archetype self; |
592 | public: |
593 | typedef std::random_access_iterator_tag iterator_category; |
594 | typedef T value_type; |
595 | typedef const T& reference; |
596 | typedef T* pointer; |
597 | typedef std::ptrdiff_t difference_type; |
598 | random_access_iterator_archetype() { } |
599 | self& operator=(const self&) { return *this; } |
600 | bool operator==(const self&) const { return true; } |
601 | bool operator!=(const self&) const { return true; } |
602 | reference operator*() const { return static_object<T>::get(); } |
603 | self& operator++() { return *this; } |
604 | self operator++(int) { return *this; } |
605 | self& operator--() { return *this; } |
606 | self operator--(int) { return *this; } |
607 | reference operator[](difference_type) const |
608 | { return static_object<T>::get(); } |
609 | self& operator+=(difference_type) { return *this; } |
610 | self& operator-=(difference_type) { return *this; } |
611 | difference_type operator-(const self&) const |
612 | { return difference_type(); } |
613 | self operator+(difference_type) const { return *this; } |
614 | self operator-(difference_type) const { return *this; } |
615 | bool operator<(const self&) const { return true; } |
616 | bool operator<=(const self&) const { return true; } |
617 | bool operator>(const self&) const { return true; } |
618 | bool operator>=(const self&) const { return true; } |
619 | }; |
620 | template <class T> |
621 | random_access_iterator_archetype<T> |
622 | operator+(typename random_access_iterator_archetype<T>::difference_type, |
623 | const random_access_iterator_archetype<T>& x) |
624 | { return x; } |
625 | |
626 | |
627 | template <class T> |
628 | class mutable_random_access_iterator_archetype |
629 | { |
630 | public: |
631 | typedef mutable_random_access_iterator_archetype self; |
632 | public: |
633 | typedef std::random_access_iterator_tag iterator_category; |
634 | typedef T value_type; |
635 | typedef T& reference; |
636 | typedef T* pointer; |
637 | typedef std::ptrdiff_t difference_type; |
638 | mutable_random_access_iterator_archetype() { } |
639 | self& operator=(const self&) { return *this; } |
640 | bool operator==(const self&) const { return true; } |
641 | bool operator!=(const self&) const { return true; } |
642 | reference operator*() const { return static_object<T>::get(); } |
643 | self& operator++() { return *this; } |
644 | self operator++(int) { return *this; } |
645 | self& operator--() { return *this; } |
646 | self operator--(int) { return *this; } |
647 | reference operator[](difference_type) const |
648 | { return static_object<T>::get(); } |
649 | self& operator+=(difference_type) { return *this; } |
650 | self& operator-=(difference_type) { return *this; } |
651 | difference_type operator-(const self&) const |
652 | { return difference_type(); } |
653 | self operator+(difference_type) const { return *this; } |
654 | self operator-(difference_type) const { return *this; } |
655 | bool operator<(const self&) const { return true; } |
656 | bool operator<=(const self&) const { return true; } |
657 | bool operator>(const self&) const { return true; } |
658 | bool operator>=(const self&) const { return true; } |
659 | }; |
660 | template <class T> |
661 | mutable_random_access_iterator_archetype<T> |
662 | operator+ |
663 | (typename mutable_random_access_iterator_archetype<T>::difference_type, |
664 | const mutable_random_access_iterator_archetype<T>& x) |
665 | { return x; } |
666 | |
667 | } // namespace boost |
668 | |
669 | #endif // BOOST_CONCEPT_ARCHETYPES_H |
670 | |