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1 | // |
2 | // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | // Official repository: https://github.com/boostorg/beast | |
8 | // | |
9 | ||
10 | #ifndef BOOST_BEAST_IMPL_BUFFERS_ADAPTOR_HPP | |
11 | #define BOOST_BEAST_IMPL_BUFFERS_ADAPTOR_HPP | |
12 | ||
13 | #include <boost/beast/core/buffer_traits.hpp> | |
f67539c2 | 14 | #include <boost/beast/core/buffers_adaptor.hpp> |
92f5a8d4 TL |
15 | #include <boost/asio/buffer.hpp> |
16 | #include <boost/config/workaround.hpp> | |
17 | #include <boost/throw_exception.hpp> | |
18 | #include <algorithm> | |
19 | #include <cstring> | |
20 | #include <iterator> | |
21 | #include <stdexcept> | |
22 | #include <type_traits> | |
23 | #include <utility> | |
24 | ||
25 | namespace boost { | |
26 | namespace beast { | |
27 | ||
28 | //------------------------------------------------------------------------------ | |
29 | ||
30 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1910) | |
31 | # pragma warning (push) | |
32 | # pragma warning (disable: 4521) // multiple copy constructors specified | |
33 | # pragma warning (disable: 4522) // multiple assignment operators specified | |
34 | #endif | |
35 | ||
36 | template<class MutableBufferSequence> | |
37 | template<bool isMutable> | |
f67539c2 | 38 | class buffers_adaptor<MutableBufferSequence>::subrange |
92f5a8d4 | 39 | { |
92f5a8d4 | 40 | public: |
f67539c2 TL |
41 | using value_type = typename std::conditional< |
42 | isMutable, | |
43 | net::mutable_buffer, | |
44 | net::const_buffer>::type; | |
92f5a8d4 | 45 | |
f67539c2 | 46 | struct iterator; |
92f5a8d4 | 47 | |
f67539c2 TL |
48 | // construct from two iterators plus optionally subrange definition |
49 | subrange( | |
50 | iter_type first, // iterator to first buffer in storage | |
51 | iter_type last, // iterator to last buffer in storage | |
52 | std::size_t pos = 0, // the offset in bytes from the beginning of the storage | |
53 | std::size_t n = // the total length of the subrange | |
54 | (std::numeric_limits<std::size_t>::max)()); | |
92f5a8d4 TL |
55 | |
56 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1910) | |
f67539c2 TL |
57 | subrange( |
58 | subrange const& other) | |
59 | : first_(other.first_) | |
60 | , last_(other.last_) | |
61 | , first_offset_(other.first_offset_) | |
62 | , last_size_(other.last_size_) | |
92f5a8d4 TL |
63 | { |
64 | } | |
65 | ||
f67539c2 TL |
66 | subrange& operator=( |
67 | subrange const& other) | |
92f5a8d4 | 68 | { |
f67539c2 TL |
69 | first_ = other.first_; |
70 | last_ = other.last_; | |
71 | first_offset_ = other.first_offset_; | |
72 | last_size_ = other.last_size_; | |
92f5a8d4 TL |
73 | return *this; |
74 | } | |
75 | #else | |
f67539c2 TL |
76 | subrange( |
77 | subrange const&) = default; | |
78 | subrange& operator=( | |
79 | subrange const&) = default; | |
92f5a8d4 TL |
80 | #endif |
81 | ||
f67539c2 TL |
82 | // allow conversion from mutable to const |
83 | template<bool isMutable_ = isMutable, typename | |
84 | std::enable_if<!isMutable_>::type * = nullptr> | |
85 | subrange(subrange<true> const &other) | |
86 | : first_(other.first_) | |
87 | , last_(other.last_) | |
88 | , first_offset_(other.first_offset_) | |
89 | , last_size_(other.last_size_) | |
92f5a8d4 TL |
90 | { |
91 | } | |
92 | ||
f67539c2 | 93 | iterator |
92f5a8d4 TL |
94 | begin() const; |
95 | ||
f67539c2 | 96 | iterator |
92f5a8d4 TL |
97 | end() const; |
98 | ||
99 | private: | |
92f5a8d4 | 100 | |
f67539c2 TL |
101 | friend subrange<!isMutable>; |
102 | ||
103 | void | |
104 | adjust( | |
105 | std::size_t pos, | |
106 | std::size_t n); | |
107 | ||
108 | private: | |
109 | // points to the first buffer in the sequence | |
110 | iter_type first_; | |
111 | ||
112 | // Points to one past the end of the underlying buffer sequence | |
113 | iter_type last_; | |
114 | ||
115 | // The initial offset into the first buffer | |
116 | std::size_t first_offset_; | |
117 | ||
118 | // how many bytes in the penultimate buffer are used (if any) | |
119 | std::size_t last_size_; | |
92f5a8d4 TL |
120 | }; |
121 | ||
122 | #if BOOST_WORKAROUND(BOOST_MSVC, < 1910) | |
123 | # pragma warning (pop) | |
124 | #endif | |
125 | ||
126 | //------------------------------------------------------------------------------ | |
127 | ||
128 | template<class MutableBufferSequence> | |
129 | template<bool isMutable> | |
f67539c2 TL |
130 | struct buffers_adaptor<MutableBufferSequence>:: |
131 | subrange<isMutable>:: | |
132 | iterator | |
92f5a8d4 | 133 | { |
f67539c2 | 134 | using iterator_category = std::bidirectional_iterator_tag; |
92f5a8d4 | 135 | using value_type = typename |
f67539c2 TL |
136 | buffers_adaptor<MutableBufferSequence>:: |
137 | template subrange<isMutable>:: | |
138 | value_type; | |
139 | using reference = value_type&; | |
140 | using pointer = value_type*; | |
92f5a8d4 | 141 | using difference_type = std::ptrdiff_t; |
92f5a8d4 | 142 | |
f67539c2 TL |
143 | iterator( |
144 | subrange<isMutable> const *parent, | |
145 | iter_type it); | |
92f5a8d4 | 146 | |
f67539c2 | 147 | iterator(); |
92f5a8d4 | 148 | |
f67539c2 TL |
149 | value_type |
150 | operator*() const; | |
92f5a8d4 TL |
151 | |
152 | pointer | |
153 | operator->() const = delete; | |
154 | ||
f67539c2 TL |
155 | iterator & |
156 | operator++(); | |
92f5a8d4 | 157 | |
f67539c2 TL |
158 | iterator |
159 | operator++(int); | |
92f5a8d4 | 160 | |
f67539c2 TL |
161 | iterator & |
162 | operator--(); | |
92f5a8d4 | 163 | |
f67539c2 TL |
164 | iterator |
165 | operator--(int); | |
92f5a8d4 TL |
166 | |
167 | bool | |
f67539c2 | 168 | operator==(iterator const &b) const; |
92f5a8d4 TL |
169 | |
170 | bool | |
f67539c2 | 171 | operator!=(iterator const &b) const; |
92f5a8d4 TL |
172 | |
173 | private: | |
92f5a8d4 | 174 | |
f67539c2 TL |
175 | subrange<isMutable> const *parent_; |
176 | iter_type it_; | |
92f5a8d4 TL |
177 | }; |
178 | ||
92f5a8d4 TL |
179 | //------------------------------------------------------------------------------ |
180 | ||
181 | template<class MutableBufferSequence> | |
182 | auto | |
183 | buffers_adaptor<MutableBufferSequence>:: | |
184 | end_impl() const -> | |
185 | iter_type | |
186 | { | |
187 | return out_ == end_ ? end_ : std::next(out_); | |
188 | } | |
189 | ||
190 | template<class MutableBufferSequence> | |
191 | buffers_adaptor<MutableBufferSequence>:: | |
192 | buffers_adaptor( | |
193 | buffers_adaptor const& other, | |
194 | std::size_t nbegin, | |
195 | std::size_t nout, | |
196 | std::size_t nend) | |
197 | : bs_(other.bs_) | |
198 | , begin_(std::next(bs_.begin(), nbegin)) | |
199 | , out_(std::next(bs_.begin(), nout)) | |
200 | , end_(std::next(bs_.begin(), nend)) | |
201 | , max_size_(other.max_size_) | |
202 | , in_pos_(other.in_pos_) | |
203 | , in_size_(other.in_size_) | |
204 | , out_pos_(other.out_pos_) | |
205 | , out_end_(other.out_end_) | |
206 | { | |
207 | } | |
208 | ||
209 | template<class MutableBufferSequence> | |
210 | buffers_adaptor<MutableBufferSequence>:: | |
211 | buffers_adaptor(MutableBufferSequence const& bs) | |
212 | : bs_(bs) | |
213 | , begin_(net::buffer_sequence_begin(bs_)) | |
214 | , out_ (net::buffer_sequence_begin(bs_)) | |
215 | , end_ (net::buffer_sequence_begin(bs_)) | |
216 | , max_size_( | |
217 | [&bs] | |
218 | { | |
219 | return buffer_bytes(bs); | |
220 | }()) | |
221 | { | |
222 | } | |
223 | ||
224 | template<class MutableBufferSequence> | |
225 | template<class... Args> | |
226 | buffers_adaptor<MutableBufferSequence>:: | |
227 | buffers_adaptor( | |
228 | boost::in_place_init_t, Args&&... args) | |
229 | : bs_{std::forward<Args>(args)...} | |
230 | , begin_(net::buffer_sequence_begin(bs_)) | |
231 | , out_ (net::buffer_sequence_begin(bs_)) | |
232 | , end_ (net::buffer_sequence_begin(bs_)) | |
233 | , max_size_( | |
234 | [&] | |
235 | { | |
236 | return buffer_bytes(bs_); | |
237 | }()) | |
238 | { | |
239 | } | |
240 | ||
241 | template<class MutableBufferSequence> | |
242 | buffers_adaptor<MutableBufferSequence>:: | |
243 | buffers_adaptor(buffers_adaptor const& other) | |
244 | : buffers_adaptor( | |
245 | other, | |
246 | std::distance<iter_type>( | |
247 | net::buffer_sequence_begin(other.bs_), | |
248 | other.begin_), | |
249 | std::distance<iter_type>( | |
250 | net::buffer_sequence_begin(other.bs_), | |
251 | other.out_), | |
252 | std::distance<iter_type>( | |
253 | net::buffer_sequence_begin(other.bs_), | |
254 | other.end_)) | |
255 | { | |
256 | } | |
257 | ||
258 | template<class MutableBufferSequence> | |
259 | auto | |
260 | buffers_adaptor<MutableBufferSequence>:: | |
261 | operator=(buffers_adaptor const& other) -> | |
262 | buffers_adaptor& | |
263 | { | |
264 | if(this == &other) | |
265 | return *this; | |
266 | auto const nbegin = std::distance<iter_type>( | |
267 | net::buffer_sequence_begin(other.bs_), | |
268 | other.begin_); | |
269 | auto const nout = std::distance<iter_type>( | |
270 | net::buffer_sequence_begin(other.bs_), | |
271 | other.out_); | |
272 | auto const nend = std::distance<iter_type>( | |
273 | net::buffer_sequence_begin(other.bs_), | |
274 | other.end_); | |
275 | bs_ = other.bs_; | |
276 | begin_ = std::next( | |
277 | net::buffer_sequence_begin(bs_), nbegin); | |
278 | out_ = std::next( | |
279 | net::buffer_sequence_begin(bs_), nout); | |
280 | end_ = std::next( | |
281 | net::buffer_sequence_begin(bs_), nend); | |
282 | max_size_ = other.max_size_; | |
283 | in_pos_ = other.in_pos_; | |
284 | in_size_ = other.in_size_; | |
285 | out_pos_ = other.out_pos_; | |
286 | out_end_ = other.out_end_; | |
287 | return *this; | |
288 | } | |
289 | ||
290 | // | |
291 | ||
292 | template<class MutableBufferSequence> | |
293 | auto | |
294 | buffers_adaptor<MutableBufferSequence>:: | |
295 | data() const noexcept -> | |
296 | const_buffers_type | |
297 | { | |
f67539c2 TL |
298 | return const_buffers_type( |
299 | begin_, end_, | |
300 | in_pos_, in_size_); | |
92f5a8d4 TL |
301 | } |
302 | ||
303 | template<class MutableBufferSequence> | |
304 | auto | |
305 | buffers_adaptor<MutableBufferSequence>:: | |
306 | data() noexcept -> | |
f67539c2 | 307 | mutable_buffers_type |
92f5a8d4 | 308 | { |
f67539c2 TL |
309 | return mutable_buffers_type( |
310 | begin_, end_, | |
311 | in_pos_, in_size_); | |
92f5a8d4 TL |
312 | } |
313 | ||
314 | template<class MutableBufferSequence> | |
315 | auto | |
316 | buffers_adaptor<MutableBufferSequence>:: | |
317 | prepare(std::size_t n) -> | |
318 | mutable_buffers_type | |
319 | { | |
f67539c2 | 320 | auto prepared = n; |
92f5a8d4 TL |
321 | end_ = out_; |
322 | if(end_ != net::buffer_sequence_end(bs_)) | |
323 | { | |
324 | auto size = buffer_bytes(*end_) - out_pos_; | |
325 | if(n > size) | |
326 | { | |
327 | n -= size; | |
328 | while(++end_ != | |
329 | net::buffer_sequence_end(bs_)) | |
330 | { | |
331 | size = buffer_bytes(*end_); | |
332 | if(n < size) | |
333 | { | |
334 | out_end_ = n; | |
335 | n = 0; | |
336 | ++end_; | |
337 | break; | |
338 | } | |
339 | n -= size; | |
340 | out_end_ = size; | |
341 | } | |
342 | } | |
343 | else | |
344 | { | |
345 | ++end_; | |
346 | out_end_ = out_pos_ + n; | |
347 | n = 0; | |
348 | } | |
349 | } | |
350 | if(n > 0) | |
351 | BOOST_THROW_EXCEPTION(std::length_error{ | |
352 | "buffers_adaptor too long"}); | |
f67539c2 | 353 | return mutable_buffers_type(out_, end_, out_pos_, prepared); |
92f5a8d4 TL |
354 | } |
355 | ||
356 | template<class MutableBufferSequence> | |
357 | void | |
358 | buffers_adaptor<MutableBufferSequence>:: | |
359 | commit(std::size_t n) noexcept | |
360 | { | |
361 | if(out_ == end_) | |
362 | return; | |
363 | auto const last = std::prev(end_); | |
364 | while(out_ != last) | |
365 | { | |
366 | auto const avail = | |
367 | buffer_bytes(*out_) - out_pos_; | |
368 | if(n < avail) | |
369 | { | |
370 | out_pos_ += n; | |
371 | in_size_ += n; | |
372 | return; | |
373 | } | |
374 | ++out_; | |
375 | n -= avail; | |
376 | out_pos_ = 0; | |
377 | in_size_ += avail; | |
378 | } | |
379 | ||
380 | n = std::min<std::size_t>( | |
381 | n, out_end_ - out_pos_); | |
382 | out_pos_ += n; | |
383 | in_size_ += n; | |
384 | if(out_pos_ == buffer_bytes(*out_)) | |
385 | { | |
386 | ++out_; | |
387 | out_pos_ = 0; | |
388 | out_end_ = 0; | |
389 | } | |
390 | } | |
391 | ||
392 | template<class MutableBufferSequence> | |
393 | void | |
394 | buffers_adaptor<MutableBufferSequence>:: | |
395 | consume(std::size_t n) noexcept | |
396 | { | |
397 | while(begin_ != out_) | |
398 | { | |
399 | auto const avail = | |
400 | buffer_bytes(*begin_) - in_pos_; | |
401 | if(n < avail) | |
402 | { | |
403 | in_size_ -= n; | |
404 | in_pos_ += n; | |
405 | return; | |
406 | } | |
407 | n -= avail; | |
408 | in_size_ -= avail; | |
409 | in_pos_ = 0; | |
410 | ++begin_; | |
411 | } | |
412 | auto const avail = out_pos_ - in_pos_; | |
413 | if(n < avail) | |
414 | { | |
415 | in_size_ -= n; | |
416 | in_pos_ += n; | |
417 | } | |
418 | else | |
419 | { | |
420 | in_size_ -= avail; | |
421 | in_pos_ = out_pos_; | |
422 | } | |
423 | } | |
424 | ||
f67539c2 TL |
425 | template<class MutableBufferSequence> |
426 | auto | |
427 | buffers_adaptor<MutableBufferSequence>:: | |
428 | make_subrange(std::size_t pos, std::size_t n) -> | |
429 | subrange<true> | |
430 | { | |
431 | return subrange<true>( | |
432 | begin_, net::buffer_sequence_end(bs_), | |
433 | in_pos_ + pos, n); | |
434 | } | |
435 | ||
436 | template<class MutableBufferSequence> | |
437 | auto | |
438 | buffers_adaptor<MutableBufferSequence>:: | |
439 | make_subrange(std::size_t pos, std::size_t n) const -> | |
440 | subrange<false> | |
441 | { | |
442 | return subrange<false>( | |
443 | begin_, net::buffer_sequence_end(bs_), | |
444 | in_pos_ + pos, n); | |
445 | } | |
446 | ||
447 | // ------------------------------------------------------------------------- | |
448 | // subrange | |
449 | ||
450 | template<class MutableBufferSequence> | |
451 | template<bool isMutable> | |
452 | buffers_adaptor<MutableBufferSequence>:: | |
453 | subrange<isMutable>:: | |
454 | subrange( | |
455 | iter_type first, // iterator to first buffer in storage | |
456 | iter_type last, // iterator to last buffer in storage | |
457 | std::size_t pos, // the offset in bytes from the beginning of the storage | |
458 | std::size_t n) // the total length of the subrange | |
459 | : first_(first) | |
460 | , last_(last) | |
461 | , first_offset_(0) | |
462 | , last_size_((std::numeric_limits<std::size_t>::max)()) | |
463 | { | |
464 | adjust(pos, n); | |
465 | } | |
466 | ||
467 | template<class MutableBufferSequence> | |
468 | template<bool isMutable> | |
469 | void | |
470 | buffers_adaptor<MutableBufferSequence>:: | |
471 | subrange<isMutable>:: | |
472 | adjust( | |
473 | std::size_t pos, | |
474 | std::size_t n) | |
475 | { | |
476 | if (n == 0) | |
477 | last_ = first_; | |
478 | ||
479 | if (first_ == last_) | |
480 | { | |
481 | first_offset_ = 0; | |
482 | last_size_ = 0; | |
483 | return; | |
484 | } | |
485 | ||
486 | auto is_last = [this](iter_type iter) { | |
487 | return std::next(iter) == last_; | |
488 | }; | |
489 | ||
490 | ||
491 | pos += first_offset_; | |
492 | while (pos) | |
493 | { | |
494 | auto adjust = (std::min)(pos, first_->size()); | |
495 | if (adjust >= first_->size()) | |
496 | { | |
497 | ++first_; | |
498 | first_offset_ = 0; | |
499 | pos -= adjust; | |
500 | } | |
501 | else | |
502 | { | |
503 | first_offset_ = adjust; | |
504 | pos = 0; | |
505 | break; | |
506 | } | |
507 | } | |
508 | ||
509 | auto current = first_; | |
510 | auto max_elem = current->size() - first_offset_; | |
511 | if (is_last(current)) | |
512 | { | |
513 | // both first and last element | |
514 | last_size_ = (std::min)(max_elem, n); | |
515 | last_ = std::next(current); | |
516 | return; | |
517 | } | |
518 | else if (max_elem >= n) | |
519 | { | |
520 | last_ = std::next(current); | |
521 | last_size_ = n; | |
522 | } | |
523 | else | |
524 | { | |
525 | n -= max_elem; | |
526 | ++current; | |
527 | } | |
528 | ||
529 | for (;;) | |
530 | { | |
531 | max_elem = current->size(); | |
532 | if (is_last(current)) | |
533 | { | |
534 | last_size_ = (std::min)(n, last_size_); | |
535 | return; | |
536 | } | |
537 | else if (max_elem < n) | |
538 | { | |
539 | n -= max_elem; | |
540 | ++current; | |
541 | } | |
542 | else | |
543 | { | |
544 | last_size_ = n; | |
545 | last_ = std::next(current); | |
546 | return; | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
551 | ||
552 | template<class MutableBufferSequence> | |
553 | template<bool isMutable> | |
554 | auto | |
555 | buffers_adaptor<MutableBufferSequence>:: | |
556 | subrange<isMutable>:: | |
557 | begin() const -> | |
558 | iterator | |
559 | { | |
560 | return iterator(this, first_); | |
561 | } | |
562 | ||
563 | template<class MutableBufferSequence> | |
564 | template<bool isMutable> | |
565 | auto | |
566 | buffers_adaptor<MutableBufferSequence>:: | |
567 | subrange<isMutable>:: | |
568 | end() const -> | |
569 | iterator | |
570 | { | |
571 | return iterator(this, last_); | |
572 | } | |
573 | ||
574 | // ------------------------------------------------------------------------- | |
575 | // buffers_adaptor::subrange::iterator | |
576 | ||
577 | template<class MutableBufferSequence> | |
578 | template<bool isMutable> | |
579 | buffers_adaptor<MutableBufferSequence>:: | |
580 | subrange<isMutable>:: | |
581 | iterator:: | |
582 | iterator() | |
583 | : parent_(nullptr) | |
584 | , it_() | |
585 | { | |
586 | } | |
587 | ||
588 | template<class MutableBufferSequence> | |
589 | template<bool isMutable> | |
590 | buffers_adaptor<MutableBufferSequence>:: | |
591 | subrange<isMutable>:: | |
592 | iterator:: | |
593 | iterator(subrange<isMutable> const *parent, | |
594 | iter_type it) | |
595 | : parent_(parent) | |
596 | , it_(it) | |
597 | { | |
598 | } | |
599 | ||
600 | template<class MutableBufferSequence> | |
601 | template<bool isMutable> | |
602 | auto | |
603 | buffers_adaptor<MutableBufferSequence>:: | |
604 | subrange<isMutable>:: | |
605 | iterator:: | |
606 | operator*() const -> | |
607 | value_type | |
608 | { | |
609 | value_type result = *it_; | |
610 | ||
611 | if (it_ == parent_->first_) | |
612 | result += parent_->first_offset_; | |
613 | ||
614 | if (std::next(it_) == parent_->last_) | |
615 | { | |
616 | result = value_type( | |
617 | result.data(), | |
618 | (std::min)( | |
619 | parent_->last_size_, | |
620 | result.size())); | |
621 | } | |
622 | ||
623 | return result; | |
624 | } | |
625 | ||
626 | template<class MutableBufferSequence> | |
627 | template<bool isMutable> | |
628 | auto | |
629 | buffers_adaptor<MutableBufferSequence>:: | |
630 | subrange<isMutable>:: | |
631 | iterator:: | |
632 | operator++() -> | |
633 | iterator & | |
634 | { | |
635 | ++it_; | |
636 | return *this; | |
637 | } | |
638 | ||
639 | template<class MutableBufferSequence> | |
640 | template<bool isMutable> | |
641 | auto | |
642 | buffers_adaptor<MutableBufferSequence>:: | |
643 | subrange<isMutable>:: | |
644 | iterator:: | |
645 | operator++(int) -> | |
646 | iterator | |
647 | { | |
648 | auto result = *this; | |
649 | ++it_; | |
650 | return result; | |
651 | } | |
652 | ||
653 | template<class MutableBufferSequence> | |
654 | template<bool isMutable> | |
655 | auto | |
656 | buffers_adaptor<MutableBufferSequence>:: | |
657 | subrange<isMutable>:: | |
658 | iterator:: | |
659 | operator--() -> | |
660 | iterator & | |
661 | { | |
662 | --it_; | |
663 | return *this; | |
664 | } | |
665 | ||
666 | template<class MutableBufferSequence> | |
667 | template<bool isMutable> | |
668 | auto | |
669 | buffers_adaptor<MutableBufferSequence>:: | |
670 | subrange<isMutable>:: | |
671 | iterator:: | |
672 | operator--(int) -> | |
673 | iterator | |
674 | { | |
675 | auto result = *this; | |
676 | --it_; | |
677 | return result; | |
678 | } | |
679 | ||
680 | template<class MutableBufferSequence> | |
681 | template<bool isMutable> | |
682 | auto | |
683 | buffers_adaptor<MutableBufferSequence>:: | |
684 | subrange<isMutable>:: | |
685 | iterator:: | |
686 | operator==(iterator const &b) const -> | |
687 | bool | |
688 | { | |
689 | return it_ == b.it_; | |
690 | } | |
691 | ||
692 | template<class MutableBufferSequence> | |
693 | template<bool isMutable> | |
694 | auto | |
695 | buffers_adaptor<MutableBufferSequence>:: | |
696 | subrange<isMutable>:: | |
697 | iterator:: | |
698 | operator!=(iterator const &b) const -> | |
699 | bool | |
700 | { | |
701 | return !(*this == b); | |
702 | } | |
703 | ||
92f5a8d4 TL |
704 | } // beast |
705 | } // boost | |
706 | ||
707 | #endif |