source: Daodan/MSYS2/mingw32/include/c++/11.2.0/bits/deque.tcc@ 1166

Last change on this file since 1166 was 1166, checked in by rossy, 3 years ago

Daodan: Replace MinGW build env with an up-to-date MSYS2 env
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1// Deque implementation (out of line) -*- C++ -*-
2
3// Copyright (C) 2001-2021 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/*
26 *
27 * Copyright (c) 1994
28 * Hewlett-Packard Company
29 *
30 * Permission to use, copy, modify, distribute and sell this software
31 * and its documentation for any purpose is hereby granted without fee,
32 * provided that the above copyright notice appear in all copies and
33 * that both that copyright notice and this permission notice appear
34 * in supporting documentation. Hewlett-Packard Company makes no
35 * representations about the suitability of this software for any
36 * purpose. It is provided "as is" without express or implied warranty.
37 *
38 *
39 * Copyright (c) 1997
40 * Silicon Graphics Computer Systems, Inc.
41 *
42 * Permission to use, copy, modify, distribute and sell this software
43 * and its documentation for any purpose is hereby granted without fee,
44 * provided that the above copyright notice appear in all copies and
45 * that both that copyright notice and this permission notice appear
46 * in supporting documentation. Silicon Graphics makes no
47 * representations about the suitability of this software for any
48 * purpose. It is provided "as is" without express or implied warranty.
49 */
50
51/** @file bits/deque.tcc
52 * This is an internal header file, included by other library headers.
53 * Do not attempt to use it directly. @headername{deque}
54 */
55
56#ifndef _DEQUE_TCC
57#define _DEQUE_TCC 1
58
59#include <bits/stl_algobase.h>
60
61namespace std _GLIBCXX_VISIBILITY(default)
62{
63_GLIBCXX_BEGIN_NAMESPACE_VERSION
64_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
65
66#if __cplusplus >= 201103L
67 template <typename _Tp, typename _Alloc>
68 void
69 deque<_Tp, _Alloc>::
70 _M_default_initialize()
71 {
72 _Map_pointer __cur;
73 __try
74 {
75 for (__cur = this->_M_impl._M_start._M_node;
76 __cur < this->_M_impl._M_finish._M_node;
77 ++__cur)
78 std::__uninitialized_default_a(*__cur, *__cur + _S_buffer_size(),
79 _M_get_Tp_allocator());
80 std::__uninitialized_default_a(this->_M_impl._M_finish._M_first,
81 this->_M_impl._M_finish._M_cur,
82 _M_get_Tp_allocator());
83 }
84 __catch(...)
85 {
86 std::_Destroy(this->_M_impl._M_start, iterator(*__cur, __cur),
87 _M_get_Tp_allocator());
88 __throw_exception_again;
89 }
90 }
91#endif
92
93 template <typename _Tp, typename _Alloc>
94 deque<_Tp, _Alloc>&
95 deque<_Tp, _Alloc>::
96 operator=(const deque& __x)
97 {
98 if (&__x != this)
99 {
100#if __cplusplus >= 201103L
101 if (_Alloc_traits::_S_propagate_on_copy_assign())
102 {
103 if (!_Alloc_traits::_S_always_equal()
104 && _M_get_Tp_allocator() != __x._M_get_Tp_allocator())
105 {
106 // Replacement allocator cannot free existing storage,
107 // so deallocate everything and take copy of __x's data.
108 _M_replace_map(__x, __x.get_allocator());
109 std::__alloc_on_copy(_M_get_Tp_allocator(),
110 __x._M_get_Tp_allocator());
111 return *this;
112 }
113 std::__alloc_on_copy(_M_get_Tp_allocator(),
114 __x._M_get_Tp_allocator());
115 }
116#endif
117 const size_type __len = size();
118 if (__len >= __x.size())
119 _M_erase_at_end(std::copy(__x.begin(), __x.end(),
120 this->_M_impl._M_start));
121 else
122 {
123 const_iterator __mid = __x.begin() + difference_type(__len);
124 std::copy(__x.begin(), __mid, this->_M_impl._M_start);
125 _M_range_insert_aux(this->_M_impl._M_finish, __mid, __x.end(),
126 std::random_access_iterator_tag());
127 }
128 }
129 return *this;
130 }
131
132#if __cplusplus >= 201103L
133 template<typename _Tp, typename _Alloc>
134 template<typename... _Args>
135#if __cplusplus > 201402L
136 typename deque<_Tp, _Alloc>::reference
137#else
138 void
139#endif
140 deque<_Tp, _Alloc>::
141 emplace_front(_Args&&... __args)
142 {
143 if (this->_M_impl._M_start._M_cur != this->_M_impl._M_start._M_first)
144 {
145 _Alloc_traits::construct(this->_M_impl,
146 this->_M_impl._M_start._M_cur - 1,
147 std::forward<_Args>(__args)...);
148 --this->_M_impl._M_start._M_cur;
149 }
150 else
151 _M_push_front_aux(std::forward<_Args>(__args)...);
152#if __cplusplus > 201402L
153 return front();
154#endif
155 }
156
157 template<typename _Tp, typename _Alloc>
158 template<typename... _Args>
159#if __cplusplus > 201402L
160 typename deque<_Tp, _Alloc>::reference
161#else
162 void
163#endif
164 deque<_Tp, _Alloc>::
165 emplace_back(_Args&&... __args)
166 {
167 if (this->_M_impl._M_finish._M_cur
168 != this->_M_impl._M_finish._M_last - 1)
169 {
170 _Alloc_traits::construct(this->_M_impl,
171 this->_M_impl._M_finish._M_cur,
172 std::forward<_Args>(__args)...);
173 ++this->_M_impl._M_finish._M_cur;
174 }
175 else
176 _M_push_back_aux(std::forward<_Args>(__args)...);
177#if __cplusplus > 201402L
178 return back();
179#endif
180 }
181#endif
182
183#if __cplusplus >= 201103L
184 template<typename _Tp, typename _Alloc>
185 template<typename... _Args>
186 typename deque<_Tp, _Alloc>::iterator
187 deque<_Tp, _Alloc>::
188 emplace(const_iterator __position, _Args&&... __args)
189 {
190 if (__position._M_cur == this->_M_impl._M_start._M_cur)
191 {
192 emplace_front(std::forward<_Args>(__args)...);
193 return this->_M_impl._M_start;
194 }
195 else if (__position._M_cur == this->_M_impl._M_finish._M_cur)
196 {
197 emplace_back(std::forward<_Args>(__args)...);
198 iterator __tmp = this->_M_impl._M_finish;
199 --__tmp;
200 return __tmp;
201 }
202 else
203 return _M_insert_aux(__position._M_const_cast(),
204 std::forward<_Args>(__args)...);
205 }
206#endif
207
208 template <typename _Tp, typename _Alloc>
209 typename deque<_Tp, _Alloc>::iterator
210 deque<_Tp, _Alloc>::
211#if __cplusplus >= 201103L
212 insert(const_iterator __position, const value_type& __x)
213#else
214 insert(iterator __position, const value_type& __x)
215#endif
216 {
217 if (__position._M_cur == this->_M_impl._M_start._M_cur)
218 {
219 push_front(__x);
220 return this->_M_impl._M_start;
221 }
222 else if (__position._M_cur == this->_M_impl._M_finish._M_cur)
223 {
224 push_back(__x);
225 iterator __tmp = this->_M_impl._M_finish;
226 --__tmp;
227 return __tmp;
228 }
229 else
230 return _M_insert_aux(__position._M_const_cast(), __x);
231 }
232
233 template <typename _Tp, typename _Alloc>
234 typename deque<_Tp, _Alloc>::iterator
235 deque<_Tp, _Alloc>::
236 _M_erase(iterator __position)
237 {
238 iterator __next = __position;
239 ++__next;
240 const difference_type __index = __position - begin();
241 if (static_cast<size_type>(__index) < (size() >> 1))
242 {
243 if (__position != begin())
244 _GLIBCXX_MOVE_BACKWARD3(begin(), __position, __next);
245 pop_front();
246 }
247 else
248 {
249 if (__next != end())
250 _GLIBCXX_MOVE3(__next, end(), __position);
251 pop_back();
252 }
253 return begin() + __index;
254 }
255
256 template <typename _Tp, typename _Alloc>
257 typename deque<_Tp, _Alloc>::iterator
258 deque<_Tp, _Alloc>::
259 _M_erase(iterator __first, iterator __last)
260 {
261 if (__first == __last)
262 return __first;
263 else if (__first == begin() && __last == end())
264 {
265 clear();
266 return end();
267 }
268 else
269 {
270 const difference_type __n = __last - __first;
271 const difference_type __elems_before = __first - begin();
272 if (static_cast<size_type>(__elems_before) <= (size() - __n) / 2)
273 {
274 if (__first != begin())
275 _GLIBCXX_MOVE_BACKWARD3(begin(), __first, __last);
276 _M_erase_at_begin(begin() + __n);
277 }
278 else
279 {
280 if (__last != end())
281 _GLIBCXX_MOVE3(__last, end(), __first);
282 _M_erase_at_end(end() - __n);
283 }
284 return begin() + __elems_before;
285 }
286 }
287
288 template <typename _Tp, class _Alloc>
289 template <typename _InputIterator>
290 void
291 deque<_Tp, _Alloc>::
292 _M_assign_aux(_InputIterator __first, _InputIterator __last,
293 std::input_iterator_tag)
294 {
295 iterator __cur = begin();
296 for (; __first != __last && __cur != end(); ++__cur, (void)++__first)
297 *__cur = *__first;
298 if (__first == __last)
299 _M_erase_at_end(__cur);
300 else
301 _M_range_insert_aux(end(), __first, __last,
302 std::__iterator_category(__first));
303 }
304
305 template <typename _Tp, typename _Alloc>
306 void
307 deque<_Tp, _Alloc>::
308 _M_fill_insert(iterator __pos, size_type __n, const value_type& __x)
309 {
310 if (__pos._M_cur == this->_M_impl._M_start._M_cur)
311 {
312 iterator __new_start = _M_reserve_elements_at_front(__n);
313 __try
314 {
315 std::__uninitialized_fill_a(__new_start, this->_M_impl._M_start,
316 __x, _M_get_Tp_allocator());
317 this->_M_impl._M_start = __new_start;
318 }
319 __catch(...)
320 {
321 _M_destroy_nodes(__new_start._M_node,
322 this->_M_impl._M_start._M_node);
323 __throw_exception_again;
324 }
325 }
326 else if (__pos._M_cur == this->_M_impl._M_finish._M_cur)
327 {
328 iterator __new_finish = _M_reserve_elements_at_back(__n);
329 __try
330 {
331 std::__uninitialized_fill_a(this->_M_impl._M_finish,
332 __new_finish, __x,
333 _M_get_Tp_allocator());
334 this->_M_impl._M_finish = __new_finish;
335 }
336 __catch(...)
337 {
338 _M_destroy_nodes(this->_M_impl._M_finish._M_node + 1,
339 __new_finish._M_node + 1);
340 __throw_exception_again;
341 }
342 }
343 else
344 _M_insert_aux(__pos, __n, __x);
345 }
346
347#if __cplusplus >= 201103L
348 template <typename _Tp, typename _Alloc>
349 void
350 deque<_Tp, _Alloc>::
351 _M_default_append(size_type __n)
352 {
353 if (__n)
354 {
355 iterator __new_finish = _M_reserve_elements_at_back(__n);
356 __try
357 {
358 std::__uninitialized_default_a(this->_M_impl._M_finish,
359 __new_finish,
360 _M_get_Tp_allocator());
361 this->_M_impl._M_finish = __new_finish;
362 }
363 __catch(...)
364 {
365 _M_destroy_nodes(this->_M_impl._M_finish._M_node + 1,
366 __new_finish._M_node + 1);
367 __throw_exception_again;
368 }
369 }
370 }
371
372 template <typename _Tp, typename _Alloc>
373 bool
374 deque<_Tp, _Alloc>::
375 _M_shrink_to_fit()
376 {
377 const difference_type __front_capacity
378 = (this->_M_impl._M_start._M_cur - this->_M_impl._M_start._M_first);
379 if (__front_capacity == 0)
380 return false;
381
382 const difference_type __back_capacity
383 = (this->_M_impl._M_finish._M_last - this->_M_impl._M_finish._M_cur);
384 if (__front_capacity + __back_capacity < _S_buffer_size())
385 return false;
386
387 return std::__shrink_to_fit_aux<deque>::_S_do_it(*this);
388 }
389#endif
390
391 template <typename _Tp, typename _Alloc>
392 void
393 deque<_Tp, _Alloc>::
394 _M_fill_initialize(const value_type& __value)
395 {
396 _Map_pointer __cur;
397 __try
398 {
399 for (__cur = this->_M_impl._M_start._M_node;
400 __cur < this->_M_impl._M_finish._M_node;
401 ++__cur)
402 std::__uninitialized_fill_a(*__cur, *__cur + _S_buffer_size(),
403 __value, _M_get_Tp_allocator());
404 std::__uninitialized_fill_a(this->_M_impl._M_finish._M_first,
405 this->_M_impl._M_finish._M_cur,
406 __value, _M_get_Tp_allocator());
407 }
408 __catch(...)
409 {
410 std::_Destroy(this->_M_impl._M_start, iterator(*__cur, __cur),
411 _M_get_Tp_allocator());
412 __throw_exception_again;
413 }
414 }
415
416 template <typename _Tp, typename _Alloc>
417 template <typename _InputIterator>
418 void
419 deque<_Tp, _Alloc>::
420 _M_range_initialize(_InputIterator __first, _InputIterator __last,
421 std::input_iterator_tag)
422 {
423 this->_M_initialize_map(0);
424 __try
425 {
426 for (; __first != __last; ++__first)
427#if __cplusplus >= 201103L
428 emplace_back(*__first);
429#else
430 push_back(*__first);
431#endif
432 }
433 __catch(...)
434 {
435 clear();
436 __throw_exception_again;
437 }
438 }
439
440 template <typename _Tp, typename _Alloc>
441 template <typename _ForwardIterator>
442 void
443 deque<_Tp, _Alloc>::
444 _M_range_initialize(_ForwardIterator __first, _ForwardIterator __last,
445 std::forward_iterator_tag)
446 {
447 const size_type __n = std::distance(__first, __last);
448 this->_M_initialize_map(_S_check_init_len(__n, _M_get_Tp_allocator()));
449
450 _Map_pointer __cur_node;
451 __try
452 {
453 for (__cur_node = this->_M_impl._M_start._M_node;
454 __cur_node < this->_M_impl._M_finish._M_node;
455 ++__cur_node)
456 {
457 _ForwardIterator __mid = __first;
458 std::advance(__mid, _S_buffer_size());
459 std::__uninitialized_copy_a(__first, __mid, *__cur_node,
460 _M_get_Tp_allocator());
461 __first = __mid;
462 }
463 std::__uninitialized_copy_a(__first, __last,
464 this->_M_impl._M_finish._M_first,
465 _M_get_Tp_allocator());
466 }
467 __catch(...)
468 {
469 std::_Destroy(this->_M_impl._M_start,
470 iterator(*__cur_node, __cur_node),
471 _M_get_Tp_allocator());
472 __throw_exception_again;
473 }
474 }
475
476 // Called only if _M_impl._M_finish._M_cur == _M_impl._M_finish._M_last - 1.
477 template<typename _Tp, typename _Alloc>
478#if __cplusplus >= 201103L
479 template<typename... _Args>
480 void
481 deque<_Tp, _Alloc>::
482 _M_push_back_aux(_Args&&... __args)
483#else
484 void
485 deque<_Tp, _Alloc>::
486 _M_push_back_aux(const value_type& __t)
487#endif
488 {
489 if (size() == max_size())
490 __throw_length_error(
491 __N("cannot create std::deque larger than max_size()"));
492
493 _M_reserve_map_at_back();
494 *(this->_M_impl._M_finish._M_node + 1) = this->_M_allocate_node();
495 __try
496 {
497#if __cplusplus >= 201103L
498 _Alloc_traits::construct(this->_M_impl,
499 this->_M_impl._M_finish._M_cur,
500 std::forward<_Args>(__args)...);
501#else
502 this->_M_impl.construct(this->_M_impl._M_finish._M_cur, __t);
503#endif
504 this->_M_impl._M_finish._M_set_node(this->_M_impl._M_finish._M_node
505 + 1);
506 this->_M_impl._M_finish._M_cur = this->_M_impl._M_finish._M_first;
507 }
508 __catch(...)
509 {
510 _M_deallocate_node(*(this->_M_impl._M_finish._M_node + 1));
511 __throw_exception_again;
512 }
513 }
514
515 // Called only if _M_impl._M_start._M_cur == _M_impl._M_start._M_first.
516 template<typename _Tp, typename _Alloc>
517#if __cplusplus >= 201103L
518 template<typename... _Args>
519 void
520 deque<_Tp, _Alloc>::
521 _M_push_front_aux(_Args&&... __args)
522#else
523 void
524 deque<_Tp, _Alloc>::
525 _M_push_front_aux(const value_type& __t)
526#endif
527 {
528 if (size() == max_size())
529 __throw_length_error(
530 __N("cannot create std::deque larger than max_size()"));
531
532 _M_reserve_map_at_front();
533 *(this->_M_impl._M_start._M_node - 1) = this->_M_allocate_node();
534 __try
535 {
536 this->_M_impl._M_start._M_set_node(this->_M_impl._M_start._M_node
537 - 1);
538 this->_M_impl._M_start._M_cur = this->_M_impl._M_start._M_last - 1;
539#if __cplusplus >= 201103L
540 _Alloc_traits::construct(this->_M_impl,
541 this->_M_impl._M_start._M_cur,
542 std::forward<_Args>(__args)...);
543#else
544 this->_M_impl.construct(this->_M_impl._M_start._M_cur, __t);
545#endif
546 }
547 __catch(...)
548 {
549 ++this->_M_impl._M_start;
550 _M_deallocate_node(*(this->_M_impl._M_start._M_node - 1));
551 __throw_exception_again;
552 }
553 }
554
555 // Called only if _M_impl._M_finish._M_cur == _M_impl._M_finish._M_first.
556 template <typename _Tp, typename _Alloc>
557 void deque<_Tp, _Alloc>::
558 _M_pop_back_aux()
559 {
560 _M_deallocate_node(this->_M_impl._M_finish._M_first);
561 this->_M_impl._M_finish._M_set_node(this->_M_impl._M_finish._M_node - 1);
562 this->_M_impl._M_finish._M_cur = this->_M_impl._M_finish._M_last - 1;
563 _Alloc_traits::destroy(_M_get_Tp_allocator(),
564 this->_M_impl._M_finish._M_cur);
565 }
566
567 // Called only if _M_impl._M_start._M_cur == _M_impl._M_start._M_last - 1.
568 // Note that if the deque has at least one element (a precondition for this
569 // member function), and if
570 // _M_impl._M_start._M_cur == _M_impl._M_start._M_last,
571 // then the deque must have at least two nodes.
572 template <typename _Tp, typename _Alloc>
573 void deque<_Tp, _Alloc>::
574 _M_pop_front_aux()
575 {
576 _Alloc_traits::destroy(_M_get_Tp_allocator(),
577 this->_M_impl._M_start._M_cur);
578 _M_deallocate_node(this->_M_impl._M_start._M_first);
579 this->_M_impl._M_start._M_set_node(this->_M_impl._M_start._M_node + 1);
580 this->_M_impl._M_start._M_cur = this->_M_impl._M_start._M_first;
581 }
582
583 template <typename _Tp, typename _Alloc>
584 template <typename _InputIterator>
585 void
586 deque<_Tp, _Alloc>::
587 _M_range_insert_aux(iterator __pos,
588 _InputIterator __first, _InputIterator __last,
589 std::input_iterator_tag)
590 { std::copy(__first, __last, std::inserter(*this, __pos)); }
591
592 template <typename _Tp, typename _Alloc>
593 template <typename _ForwardIterator>
594 void
595 deque<_Tp, _Alloc>::
596 _M_range_insert_aux(iterator __pos,
597 _ForwardIterator __first, _ForwardIterator __last,
598 std::forward_iterator_tag)
599 {
600 const size_type __n = std::distance(__first, __last);
601 if (__pos._M_cur == this->_M_impl._M_start._M_cur)
602 {
603 iterator __new_start = _M_reserve_elements_at_front(__n);
604 __try
605 {
606 std::__uninitialized_copy_a(__first, __last, __new_start,
607 _M_get_Tp_allocator());
608 this->_M_impl._M_start = __new_start;
609 }
610 __catch(...)
611 {
612 _M_destroy_nodes(__new_start._M_node,
613 this->_M_impl._M_start._M_node);
614 __throw_exception_again;
615 }
616 }
617 else if (__pos._M_cur == this->_M_impl._M_finish._M_cur)
618 {
619 iterator __new_finish = _M_reserve_elements_at_back(__n);
620 __try
621 {
622 std::__uninitialized_copy_a(__first, __last,
623 this->_M_impl._M_finish,
624 _M_get_Tp_allocator());
625 this->_M_impl._M_finish = __new_finish;
626 }
627 __catch(...)
628 {
629 _M_destroy_nodes(this->_M_impl._M_finish._M_node + 1,
630 __new_finish._M_node + 1);
631 __throw_exception_again;
632 }
633 }
634 else
635 _M_insert_aux(__pos, __first, __last, __n);
636 }
637
638 template<typename _Tp, typename _Alloc>
639#if __cplusplus >= 201103L
640 template<typename... _Args>
641 typename deque<_Tp, _Alloc>::iterator
642 deque<_Tp, _Alloc>::
643 _M_insert_aux(iterator __pos, _Args&&... __args)
644 {
645 value_type __x_copy(std::forward<_Args>(__args)...); // XXX copy
646#else
647 typename deque<_Tp, _Alloc>::iterator
648 deque<_Tp, _Alloc>::
649 _M_insert_aux(iterator __pos, const value_type& __x)
650 {
651 value_type __x_copy = __x; // XXX copy
652#endif
653 difference_type __index = __pos - this->_M_impl._M_start;
654 if (static_cast<size_type>(__index) < size() / 2)
655 {
656 push_front(_GLIBCXX_MOVE(front()));
657 iterator __front1 = this->_M_impl._M_start;
658 ++__front1;
659 iterator __front2 = __front1;
660 ++__front2;
661 __pos = this->_M_impl._M_start + __index;
662 iterator __pos1 = __pos;
663 ++__pos1;
664 _GLIBCXX_MOVE3(__front2, __pos1, __front1);
665 }
666 else
667 {
668 push_back(_GLIBCXX_MOVE(back()));
669 iterator __back1 = this->_M_impl._M_finish;
670 --__back1;
671 iterator __back2 = __back1;
672 --__back2;
673 __pos = this->_M_impl._M_start + __index;
674 _GLIBCXX_MOVE_BACKWARD3(__pos, __back2, __back1);
675 }
676 *__pos = _GLIBCXX_MOVE(__x_copy);
677 return __pos;
678 }
679
680 template <typename _Tp, typename _Alloc>
681 void
682 deque<_Tp, _Alloc>::
683 _M_insert_aux(iterator __pos, size_type __n, const value_type& __x)
684 {
685 const difference_type __elems_before = __pos - this->_M_impl._M_start;
686 const size_type __length = this->size();
687 value_type __x_copy = __x;
688 if (__elems_before < difference_type(__length / 2))
689 {
690 iterator __new_start = _M_reserve_elements_at_front(__n);
691 iterator __old_start = this->_M_impl._M_start;
692 __pos = this->_M_impl._M_start + __elems_before;
693 __try
694 {
695 if (__elems_before >= difference_type(__n))
696 {
697 iterator __start_n = (this->_M_impl._M_start
698 + difference_type(__n));
699 std::__uninitialized_move_a(this->_M_impl._M_start,
700 __start_n, __new_start,
701 _M_get_Tp_allocator());
702 this->_M_impl._M_start = __new_start;
703 _GLIBCXX_MOVE3(__start_n, __pos, __old_start);
704 std::fill(__pos - difference_type(__n), __pos, __x_copy);
705 }
706 else
707 {
708 std::__uninitialized_move_fill(this->_M_impl._M_start,
709 __pos, __new_start,
710 this->_M_impl._M_start,
711 __x_copy,
712 _M_get_Tp_allocator());
713 this->_M_impl._M_start = __new_start;
714 std::fill(__old_start, __pos, __x_copy);
715 }
716 }
717 __catch(...)
718 {
719 _M_destroy_nodes(__new_start._M_node,
720 this->_M_impl._M_start._M_node);
721 __throw_exception_again;
722 }
723 }
724 else
725 {
726 iterator __new_finish = _M_reserve_elements_at_back(__n);
727 iterator __old_finish = this->_M_impl._M_finish;
728 const difference_type __elems_after =
729 difference_type(__length) - __elems_before;
730 __pos = this->_M_impl._M_finish - __elems_after;
731 __try
732 {
733 if (__elems_after > difference_type(__n))
734 {
735 iterator __finish_n = (this->_M_impl._M_finish
736 - difference_type(__n));
737 std::__uninitialized_move_a(__finish_n,
738 this->_M_impl._M_finish,
739 this->_M_impl._M_finish,
740 _M_get_Tp_allocator());
741 this->_M_impl._M_finish = __new_finish;
742 _GLIBCXX_MOVE_BACKWARD3(__pos, __finish_n, __old_finish);
743 std::fill(__pos, __pos + difference_type(__n), __x_copy);
744 }
745 else
746 {
747 std::__uninitialized_fill_move(this->_M_impl._M_finish,
748 __pos + difference_type(__n),
749 __x_copy, __pos,
750 this->_M_impl._M_finish,
751 _M_get_Tp_allocator());
752 this->_M_impl._M_finish = __new_finish;
753 std::fill(__pos, __old_finish, __x_copy);
754 }
755 }
756 __catch(...)
757 {
758 _M_destroy_nodes(this->_M_impl._M_finish._M_node + 1,
759 __new_finish._M_node + 1);
760 __throw_exception_again;
761 }
762 }
763 }
764
765 template <typename _Tp, typename _Alloc>
766 template <typename _ForwardIterator>
767 void
768 deque<_Tp, _Alloc>::
769 _M_insert_aux(iterator __pos,
770 _ForwardIterator __first, _ForwardIterator __last,
771 size_type __n)
772 {
773 const difference_type __elemsbefore = __pos - this->_M_impl._M_start;
774 const size_type __length = size();
775 if (static_cast<size_type>(__elemsbefore) < __length / 2)
776 {
777 iterator __new_start = _M_reserve_elements_at_front(__n);
778 iterator __old_start = this->_M_impl._M_start;
779 __pos = this->_M_impl._M_start + __elemsbefore;
780 __try
781 {
782 if (__elemsbefore >= difference_type(__n))
783 {
784 iterator __start_n = (this->_M_impl._M_start
785 + difference_type(__n));
786 std::__uninitialized_move_a(this->_M_impl._M_start,
787 __start_n, __new_start,
788 _M_get_Tp_allocator());
789 this->_M_impl._M_start = __new_start;
790 _GLIBCXX_MOVE3(__start_n, __pos, __old_start);
791 std::copy(__first, __last, __pos - difference_type(__n));
792 }
793 else
794 {
795 _ForwardIterator __mid = __first;
796 std::advance(__mid, difference_type(__n) - __elemsbefore);
797 std::__uninitialized_move_copy(this->_M_impl._M_start,
798 __pos, __first, __mid,
799 __new_start,
800 _M_get_Tp_allocator());
801 this->_M_impl._M_start = __new_start;
802 std::copy(__mid, __last, __old_start);
803 }
804 }
805 __catch(...)
806 {
807 _M_destroy_nodes(__new_start._M_node,
808 this->_M_impl._M_start._M_node);
809 __throw_exception_again;
810 }
811 }
812 else
813 {
814 iterator __new_finish = _M_reserve_elements_at_back(__n);
815 iterator __old_finish = this->_M_impl._M_finish;
816 const difference_type __elemsafter =
817 difference_type(__length) - __elemsbefore;
818 __pos = this->_M_impl._M_finish - __elemsafter;
819 __try
820 {
821 if (__elemsafter > difference_type(__n))
822 {
823 iterator __finish_n = (this->_M_impl._M_finish
824 - difference_type(__n));
825 std::__uninitialized_move_a(__finish_n,
826 this->_M_impl._M_finish,
827 this->_M_impl._M_finish,
828 _M_get_Tp_allocator());
829 this->_M_impl._M_finish = __new_finish;
830 _GLIBCXX_MOVE_BACKWARD3(__pos, __finish_n, __old_finish);
831 std::copy(__first, __last, __pos);
832 }
833 else
834 {
835 _ForwardIterator __mid = __first;
836 std::advance(__mid, __elemsafter);
837 std::__uninitialized_copy_move(__mid, __last, __pos,
838 this->_M_impl._M_finish,
839 this->_M_impl._M_finish,
840 _M_get_Tp_allocator());
841 this->_M_impl._M_finish = __new_finish;
842 std::copy(__first, __mid, __pos);
843 }
844 }
845 __catch(...)
846 {
847 _M_destroy_nodes(this->_M_impl._M_finish._M_node + 1,
848 __new_finish._M_node + 1);
849 __throw_exception_again;
850 }
851 }
852 }
853
854 template<typename _Tp, typename _Alloc>
855 void
856 deque<_Tp, _Alloc>::
857 _M_destroy_data_aux(iterator __first, iterator __last)
858 {
859 for (_Map_pointer __node = __first._M_node + 1;
860 __node < __last._M_node; ++__node)
861 std::_Destroy(*__node, *__node + _S_buffer_size(),
862 _M_get_Tp_allocator());
863
864 if (__first._M_node != __last._M_node)
865 {
866 std::_Destroy(__first._M_cur, __first._M_last,
867 _M_get_Tp_allocator());
868 std::_Destroy(__last._M_first, __last._M_cur,
869 _M_get_Tp_allocator());
870 }
871 else
872 std::_Destroy(__first._M_cur, __last._M_cur,
873 _M_get_Tp_allocator());
874 }
875
876 template <typename _Tp, typename _Alloc>
877 void
878 deque<_Tp, _Alloc>::
879 _M_new_elements_at_front(size_type __new_elems)
880 {
881 if (this->max_size() - this->size() < __new_elems)
882 __throw_length_error(__N("deque::_M_new_elements_at_front"));
883
884 const size_type __new_nodes = ((__new_elems + _S_buffer_size() - 1)
885 / _S_buffer_size());
886 _M_reserve_map_at_front(__new_nodes);
887 size_type __i;
888 __try
889 {
890 for (__i = 1; __i <= __new_nodes; ++__i)
891 *(this->_M_impl._M_start._M_node - __i) = this->_M_allocate_node();
892 }
893 __catch(...)
894 {
895 for (size_type __j = 1; __j < __i; ++__j)
896 _M_deallocate_node(*(this->_M_impl._M_start._M_node - __j));
897 __throw_exception_again;
898 }
899 }
900
901 template <typename _Tp, typename _Alloc>
902 void
903 deque<_Tp, _Alloc>::
904 _M_new_elements_at_back(size_type __new_elems)
905 {
906 if (this->max_size() - this->size() < __new_elems)
907 __throw_length_error(__N("deque::_M_new_elements_at_back"));
908
909 const size_type __new_nodes = ((__new_elems + _S_buffer_size() - 1)
910 / _S_buffer_size());
911 _M_reserve_map_at_back(__new_nodes);
912 size_type __i;
913 __try
914 {
915 for (__i = 1; __i <= __new_nodes; ++__i)
916 *(this->_M_impl._M_finish._M_node + __i) = this->_M_allocate_node();
917 }
918 __catch(...)
919 {
920 for (size_type __j = 1; __j < __i; ++__j)
921 _M_deallocate_node(*(this->_M_impl._M_finish._M_node + __j));
922 __throw_exception_again;
923 }
924 }
925
926 template <typename _Tp, typename _Alloc>
927 void
928 deque<_Tp, _Alloc>::
929 _M_reallocate_map(size_type __nodes_to_add, bool __add_at_front)
930 {
931 const size_type __old_num_nodes
932 = this->_M_impl._M_finish._M_node - this->_M_impl._M_start._M_node + 1;
933 const size_type __new_num_nodes = __old_num_nodes + __nodes_to_add;
934
935 _Map_pointer __new_nstart;
936 if (this->_M_impl._M_map_size > 2 * __new_num_nodes)
937 {
938 __new_nstart = this->_M_impl._M_map + (this->_M_impl._M_map_size
939 - __new_num_nodes) / 2
940 + (__add_at_front ? __nodes_to_add : 0);
941 if (__new_nstart < this->_M_impl._M_start._M_node)
942 std::copy(this->_M_impl._M_start._M_node,
943 this->_M_impl._M_finish._M_node + 1,
944 __new_nstart);
945 else
946 std::copy_backward(this->_M_impl._M_start._M_node,
947 this->_M_impl._M_finish._M_node + 1,
948 __new_nstart + __old_num_nodes);
949 }
950 else
951 {
952 size_type __new_map_size = this->_M_impl._M_map_size
953 + std::max(this->_M_impl._M_map_size,
954 __nodes_to_add) + 2;
955
956 _Map_pointer __new_map = this->_M_allocate_map(__new_map_size);
957 __new_nstart = __new_map + (__new_map_size - __new_num_nodes) / 2
958 + (__add_at_front ? __nodes_to_add : 0);
959 std::copy(this->_M_impl._M_start._M_node,
960 this->_M_impl._M_finish._M_node + 1,
961 __new_nstart);
962 _M_deallocate_map(this->_M_impl._M_map, this->_M_impl._M_map_size);
963
964 this->_M_impl._M_map = __new_map;
965 this->_M_impl._M_map_size = __new_map_size;
966 }
967
968 this->_M_impl._M_start._M_set_node(__new_nstart);
969 this->_M_impl._M_finish._M_set_node(__new_nstart + __old_num_nodes - 1);
970 }
971
972_GLIBCXX_END_NAMESPACE_CONTAINER
973
974 // Overload for deque::iterators, exploiting the "segmented-iterator
975 // optimization".
976 template<typename _Tp, typename _VTp>
977 void
978 __fill_a1(const _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*>& __first,
979 const _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*>& __last,
980 const _VTp& __value)
981 {
982 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> _Iter;
983 if (__first._M_node != __last._M_node)
984 {
985 std::__fill_a1(__first._M_cur, __first._M_last, __value);
986
987 for (typename _Iter::_Map_pointer __node = __first._M_node + 1;
988 __node < __last._M_node; ++__node)
989 std::__fill_a1(*__node, *__node + _Iter::_S_buffer_size(), __value);
990
991 std::__fill_a1(__last._M_first, __last._M_cur, __value);
992 }
993 else
994 std::__fill_a1(__first._M_cur, __last._M_cur, __value);
995 }
996
997 template<bool _IsMove,
998 typename _Tp, typename _Ref, typename _Ptr, typename _OI>
999 _OI
1000 __copy_move_dit(_GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first,
1001 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __last,
1002 _OI __result)
1003 {
1004 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> _Iter;
1005 if (__first._M_node != __last._M_node)
1006 {
1007 __result
1008 = std::__copy_move_a1<_IsMove>(__first._M_cur, __first._M_last,
1009 __result);
1010
1011 for (typename _Iter::_Map_pointer __node = __first._M_node + 1;
1012 __node != __last._M_node; ++__node)
1013 __result
1014 = std::__copy_move_a1<_IsMove>(*__node,
1015 *__node + _Iter::_S_buffer_size(),
1016 __result);
1017
1018 return std::__copy_move_a1<_IsMove>(__last._M_first, __last._M_cur,
1019 __result);
1020 }
1021
1022 return std::__copy_move_a1<_IsMove>(__first._M_cur, __last._M_cur,
1023 __result);
1024 }
1025
1026 template<bool _IsMove,
1027 typename _Tp, typename _Ref, typename _Ptr, typename _OI>
1028 _OI
1029 __copy_move_a1(_GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first,
1030 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __last,
1031 _OI __result)
1032 { return __copy_move_dit<_IsMove>(__first, __last, __result); }
1033
1034 template<bool _IsMove,
1035 typename _ITp, typename _IRef, typename _IPtr, typename _OTp>
1036 _GLIBCXX_STD_C::_Deque_iterator<_OTp, _OTp&, _OTp*>
1037 __copy_move_a1(_GLIBCXX_STD_C::_Deque_iterator<_ITp, _IRef, _IPtr> __first,
1038 _GLIBCXX_STD_C::_Deque_iterator<_ITp, _IRef, _IPtr> __last,
1039 _GLIBCXX_STD_C::_Deque_iterator<_OTp, _OTp&, _OTp*> __result)
1040 { return __copy_move_dit<_IsMove>(__first, __last, __result); }
1041
1042 template<bool _IsMove, typename _II, typename _Tp>
1043 typename __gnu_cxx::__enable_if<
1044 __is_random_access_iter<_II>::__value,
1045 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> >::__type
1046 __copy_move_a1(_II __first, _II __last,
1047 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> __result)
1048 {
1049 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> _Iter;
1050 typedef typename _Iter::difference_type difference_type;
1051
1052 difference_type __len = __last - __first;
1053 while (__len > 0)
1054 {
1055 const difference_type __clen
1056 = std::min(__len, __result._M_last - __result._M_cur);
1057 std::__copy_move_a1<_IsMove>(__first, __first + __clen,
1058 __result._M_cur);
1059
1060 __first += __clen;
1061 __result += __clen;
1062 __len -= __clen;
1063 }
1064
1065 return __result;
1066 }
1067
1068 template<bool _IsMove, typename _CharT>
1069 typename __gnu_cxx::__enable_if<
1070 __is_char<_CharT>::__value,
1071 _GLIBCXX_STD_C::_Deque_iterator<_CharT, _CharT&, _CharT*> >::__type
1072 __copy_move_a2(
1073 istreambuf_iterator<_CharT, char_traits<_CharT> > __first,
1074 istreambuf_iterator<_CharT, char_traits<_CharT> > __last,
1075 _GLIBCXX_STD_C::_Deque_iterator<_CharT, _CharT&, _CharT*> __result)
1076 {
1077 if (__first == __last)
1078 return __result;
1079
1080 for (;;)
1081 {
1082 const std::ptrdiff_t __len = __result._M_last - __result._M_cur;
1083 const std::ptrdiff_t __nb
1084 = std::__copy_n_a(__first, __len, __result._M_cur, false)
1085 - __result._M_cur;
1086 __result += __nb;
1087
1088 if (__nb != __len)
1089 break;
1090 }
1091
1092 return __result;
1093 }
1094
1095 template<typename _CharT, typename _Size>
1096 typename __gnu_cxx::__enable_if<
1097 __is_char<_CharT>::__value,
1098 _GLIBCXX_STD_C::_Deque_iterator<_CharT, _CharT&, _CharT*> >::__type
1099 __copy_n_a(
1100 istreambuf_iterator<_CharT, char_traits<_CharT> > __it, _Size __size,
1101 _GLIBCXX_STD_C::_Deque_iterator<_CharT, _CharT&, _CharT*> __result,
1102 bool __strict)
1103 {
1104 if (__size == 0)
1105 return __result;
1106
1107 do
1108 {
1109 const _Size __len
1110 = std::min<_Size>(__result._M_last - __result._M_cur, __size);
1111 std::__copy_n_a(__it, __len, __result._M_cur, __strict);
1112 __result += __len;
1113 __size -= __len;
1114 }
1115 while (__size != 0);
1116 return __result;
1117 }
1118
1119 template<bool _IsMove,
1120 typename _Tp, typename _Ref, typename _Ptr, typename _OI>
1121 _OI
1122 __copy_move_backward_dit(
1123 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first,
1124 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __last,
1125 _OI __result)
1126 {
1127 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> _Iter;
1128 if (__first._M_node != __last._M_node)
1129 {
1130 __result = std::__copy_move_backward_a1<_IsMove>(
1131 __last._M_first, __last._M_cur, __result);
1132
1133 for (typename _Iter::_Map_pointer __node = __last._M_node - 1;
1134 __node != __first._M_node; --__node)
1135 __result = std::__copy_move_backward_a1<_IsMove>(
1136 *__node, *__node + _Iter::_S_buffer_size(), __result);
1137
1138 return std::__copy_move_backward_a1<_IsMove>(
1139 __first._M_cur, __first._M_last, __result);
1140 }
1141
1142 return std::__copy_move_backward_a1<_IsMove>(
1143 __first._M_cur, __last._M_cur, __result);
1144 }
1145
1146 template<bool _IsMove,
1147 typename _Tp, typename _Ref, typename _Ptr, typename _OI>
1148 _OI
1149 __copy_move_backward_a1(
1150 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first,
1151 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __last,
1152 _OI __result)
1153 { return __copy_move_backward_dit<_IsMove>(__first, __last, __result); }
1154
1155 template<bool _IsMove,
1156 typename _ITp, typename _IRef, typename _IPtr, typename _OTp>
1157 _GLIBCXX_STD_C::_Deque_iterator<_OTp, _OTp&, _OTp*>
1158 __copy_move_backward_a1(
1159 _GLIBCXX_STD_C::_Deque_iterator<_ITp, _IRef, _IPtr> __first,
1160 _GLIBCXX_STD_C::_Deque_iterator<_ITp, _IRef, _IPtr> __last,
1161 _GLIBCXX_STD_C::_Deque_iterator<_OTp, _OTp&, _OTp*> __result)
1162 { return __copy_move_backward_dit<_IsMove>(__first, __last, __result); }
1163
1164 template<bool _IsMove, typename _II, typename _Tp>
1165 typename __gnu_cxx::__enable_if<
1166 __is_random_access_iter<_II>::__value,
1167 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> >::__type
1168 __copy_move_backward_a1(_II __first, _II __last,
1169 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> __result)
1170 {
1171 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Tp&, _Tp*> _Iter;
1172 typedef typename _Iter::difference_type difference_type;
1173
1174 difference_type __len = __last - __first;
1175 while (__len > 0)
1176 {
1177 difference_type __rlen = __result._M_cur - __result._M_first;
1178 _Tp* __rend = __result._M_cur;
1179 if (!__rlen)
1180 {
1181 __rlen = _Iter::_S_buffer_size();
1182 __rend = *(__result._M_node - 1) + __rlen;
1183 }
1184
1185 const difference_type __clen = std::min(__len, __rlen);
1186 std::__copy_move_backward_a1<_IsMove>(__last - __clen, __last, __rend);
1187
1188 __last -= __clen;
1189 __result -= __clen;
1190 __len -= __clen;
1191 }
1192
1193 return __result;
1194 }
1195
1196 template<typename _Tp, typename _Ref, typename _Ptr, typename _II>
1197 bool
1198 __equal_dit(
1199 const _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr>& __first1,
1200 const _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr>& __last1,
1201 _II __first2)
1202 {
1203 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> _Iter;
1204 if (__first1._M_node != __last1._M_node)
1205 {
1206 if (!std::__equal_aux1(__first1._M_cur, __first1._M_last, __first2))
1207 return false;
1208
1209 __first2 += __first1._M_last - __first1._M_cur;
1210 for (typename _Iter::_Map_pointer __node = __first1._M_node + 1;
1211 __node != __last1._M_node;
1212 __first2 += _Iter::_S_buffer_size(), ++__node)
1213 if (!std::__equal_aux1(*__node, *__node + _Iter::_S_buffer_size(),
1214 __first2))
1215 return false;
1216
1217 return std::__equal_aux1(__last1._M_first, __last1._M_cur, __first2);
1218 }
1219
1220 return std::__equal_aux1(__first1._M_cur, __last1._M_cur, __first2);
1221 }
1222
1223 template<typename _Tp, typename _Ref, typename _Ptr, typename _II>
1224 typename __gnu_cxx::__enable_if<
1225 __is_random_access_iter<_II>::__value, bool>::__type
1226 __equal_aux1(_GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first1,
1227 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __last1,
1228 _II __first2)
1229 { return std::__equal_dit(__first1, __last1, __first2); }
1230
1231 template<typename _Tp1, typename _Ref1, typename _Ptr1,
1232 typename _Tp2, typename _Ref2, typename _Ptr2>
1233 bool
1234 __equal_aux1(_GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __first1,
1235 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __last1,
1236 _GLIBCXX_STD_C::_Deque_iterator<_Tp2, _Ref2, _Ptr2> __first2)
1237 { return std::__equal_dit(__first1, __last1, __first2); }
1238
1239 template<typename _II, typename _Tp, typename _Ref, typename _Ptr>
1240 typename __gnu_cxx::__enable_if<
1241 __is_random_access_iter<_II>::__value, bool>::__type
1242 __equal_aux1(_II __first1, _II __last1,
1243 _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> __first2)
1244 {
1245 typedef _GLIBCXX_STD_C::_Deque_iterator<_Tp, _Ref, _Ptr> _Iter;
1246 typedef typename _Iter::difference_type difference_type;
1247
1248 difference_type __len = __last1 - __first1;
1249 while (__len > 0)
1250 {
1251 const difference_type __clen
1252 = std::min(__len, __first2._M_last - __first2._M_cur);
1253 if (!std::__equal_aux1(__first1, __first1 + __clen, __first2._M_cur))
1254 return false;
1255
1256 __first1 += __clen;
1257 __len -= __clen;
1258 __first2 += __clen;
1259 }
1260
1261 return true;
1262 }
1263
1264 template<typename _Tp1, typename _Ref, typename _Ptr, typename _Tp2>
1265 int
1266 __lex_cmp_dit(
1267 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref, _Ptr> __first1,
1268 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref, _Ptr> __last1,
1269 const _Tp2* __first2, const _Tp2* __last2)
1270 {
1271 const bool __simple =
1272 (__is_memcmp_ordered_with<_Tp1, _Tp2>::__value
1273 && __is_pointer<_Ptr>::__value
1274#if __cplusplus > 201703L && __cpp_lib_concepts
1275 // For C++20 iterator_traits<volatile T*>::value_type is non-volatile
1276 // so __is_byte<T> could be true, but we can't use memcmp with
1277 // volatile data.
1278 && !is_volatile_v<_Tp1>
1279 && !is_volatile_v<_Tp2>
1280#endif
1281 );
1282 typedef std::__lexicographical_compare<__simple> _Lc;
1283
1284 while (__first1._M_node != __last1._M_node)
1285 {
1286 const ptrdiff_t __len1 = __first1._M_last - __first1._M_cur;
1287 const ptrdiff_t __len2 = __last2 - __first2;
1288 const ptrdiff_t __len = std::min(__len1, __len2);
1289 // if __len1 > __len2 this will return a positive value:
1290 if (int __ret = _Lc::__3way(__first1._M_cur, __first1._M_last,
1291 __first2, __first2 + __len))
1292 return __ret;
1293
1294 __first1 += __len;
1295 __first2 += __len;
1296 }
1297 return _Lc::__3way(__first1._M_cur, __last1._M_cur,
1298 __first2, __last2);
1299 }
1300
1301 template<typename _Tp1, typename _Ref1, typename _Ptr1,
1302 typename _Tp2>
1303 inline bool
1304 __lexicographical_compare_aux1(
1305 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __first1,
1306 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __last1,
1307 _Tp2* __first2, _Tp2* __last2)
1308 { return std::__lex_cmp_dit(__first1, __last1, __first2, __last2) < 0; }
1309
1310 template<typename _Tp1,
1311 typename _Tp2, typename _Ref2, typename _Ptr2>
1312 inline bool
1313 __lexicographical_compare_aux1(_Tp1* __first1, _Tp1* __last1,
1314 _GLIBCXX_STD_C::_Deque_iterator<_Tp2, _Ref2, _Ptr2> __first2,
1315 _GLIBCXX_STD_C::_Deque_iterator<_Tp2, _Ref2, _Ptr2> __last2)
1316 { return std::__lex_cmp_dit(__first2, __last2, __first1, __last1) > 0; }
1317
1318 template<typename _Tp1, typename _Ref1, typename _Ptr1,
1319 typename _Tp2, typename _Ref2, typename _Ptr2>
1320 inline bool
1321 __lexicographical_compare_aux1(
1322 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __first1,
1323 _GLIBCXX_STD_C::_Deque_iterator<_Tp1, _Ref1, _Ptr1> __last1,
1324 _GLIBCXX_STD_C::_Deque_iterator<_Tp2, _Ref2, _Ptr2> __first2,
1325 _GLIBCXX_STD_C::_Deque_iterator<_Tp2, _Ref2, _Ptr2> __last2)
1326 {
1327 const bool __simple =
1328 (__is_memcmp_ordered_with<_Tp1, _Tp2>::__value
1329 && __is_pointer<_Ptr1>::__value
1330 && __is_pointer<_Ptr2>::__value
1331#if __cplusplus > 201703L && __cpp_lib_concepts
1332 // For C++20 iterator_traits<volatile T*>::value_type is non-volatile
1333 // so __is_byte<T> could be true, but we can't use memcmp with
1334 // volatile data.
1335 && !is_volatile_v<_Tp1>
1336 && !is_volatile_v<_Tp2>
1337#endif
1338 );
1339 typedef std::__lexicographical_compare<__simple> _Lc;
1340
1341 while (__first1 != __last1)
1342 {
1343 const ptrdiff_t __len2 = __first2._M_node == __last2._M_node
1344 ? __last2._M_cur - __first2._M_cur
1345 : __first2._M_last - __first2._M_cur;
1346 if (__len2 == 0)
1347 return false;
1348 const ptrdiff_t __len1 = __first1._M_node == __last1._M_node
1349 ? __last1._M_cur - __first1._M_cur
1350 : __first1._M_last - __first1._M_cur;
1351 const ptrdiff_t __len = std::min(__len1, __len2);
1352 if (int __ret = _Lc::__3way(__first1._M_cur, __first1._M_cur + __len,
1353 __first2._M_cur, __first2._M_cur + __len))
1354 return __ret < 0;
1355
1356 __first1 += __len;
1357 __first2 += __len;
1358 }
1359
1360 return __last2 != __first2;
1361 }
1362
1363_GLIBCXX_END_NAMESPACE_VERSION
1364} // namespace std
1365
1366#endif
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