1// Vector implementation (out of line) -*- C++ -*-
2
3// Copyright (C) 2001-2025 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) 1996
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/vector.tcc
52 * This is an internal header file, included by other library headers.
53 * Do not attempt to use it directly. @headername{vector}
54 */
55
56#ifndef _VECTOR_TCC
57#define _VECTOR_TCC 1
58
59namespace std _GLIBCXX_VISIBILITY(default)
60{
61_GLIBCXX_BEGIN_NAMESPACE_VERSION
62_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
63
64 template<typename _Tp, typename _Alloc>
65 _GLIBCXX20_CONSTEXPR
66 void
67 vector<_Tp, _Alloc>::
68 reserve(size_type __n)
69 {
70 if (__n > this->max_size())
71 __throw_length_error(__N("vector::reserve"));
72 if (this->capacity() < __n)
73 {
74 const size_type __old_size = size();
75 pointer __tmp;
76#if __cplusplus >= 201103L
77 if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
78 {
79 __tmp = this->_M_allocate(__n);
80 _S_relocate(first: this->_M_impl._M_start, last: this->_M_impl._M_finish,
81 result: __tmp, alloc&: _M_get_Tp_allocator());
82 }
83 else
84#endif
85 {
86 __tmp = _M_allocate_and_copy(__n,
87 _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_start),
88 _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_finish));
89 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
90 _M_get_Tp_allocator());
91 }
92 _GLIBCXX_ASAN_ANNOTATE_REINIT;
93 _M_deallocate(this->_M_impl._M_start,
94 this->_M_impl._M_end_of_storage
95 - this->_M_impl._M_start);
96 this->_M_impl._M_start = __tmp;
97 this->_M_impl._M_finish = __tmp + __old_size;
98 this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
99 }
100 }
101
102#if __cplusplus >= 201103L
103 template<typename _Tp, typename _Alloc>
104 template<typename... _Args>
105#if __cplusplus > 201402L
106 _GLIBCXX20_CONSTEXPR
107 typename vector<_Tp, _Alloc>::reference
108#else
109 void
110#endif
111 vector<_Tp, _Alloc>::
112 emplace_back(_Args&&... __args)
113 {
114 if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
115 {
116 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
117 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
118 std::forward<_Args>(__args)...);
119 ++this->_M_impl._M_finish;
120 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
121 }
122 else
123 _M_realloc_append(std::forward<_Args>(__args)...);
124#if __cplusplus > 201402L
125 return back();
126#endif
127 }
128#endif
129
130 template<typename _Tp, typename _Alloc>
131 _GLIBCXX20_CONSTEXPR
132 typename vector<_Tp, _Alloc>::iterator
133 vector<_Tp, _Alloc>::
134#if __cplusplus >= 201103L
135 insert(const_iterator __position, const value_type& __x)
136#else
137 insert(iterator __position, const value_type& __x)
138#endif
139 {
140 const size_type __n = __position - begin();
141 if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
142 {
143 __glibcxx_assert(__position != const_iterator());
144 if (!(__position != const_iterator()))
145 __builtin_unreachable(); // PR 106434
146
147 if (__position == end())
148 {
149 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
150 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
151 __x);
152 ++this->_M_impl._M_finish;
153 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
154 }
155 else
156 {
157#if __cplusplus >= 201103L
158 const auto __pos = begin() + (__position - cbegin());
159 // __x could be an existing element of this vector, so make a
160 // copy of it before _M_insert_aux moves elements around.
161 _Temporary_value __x_copy(this, __x);
162 _M_insert_aux(__pos, std::move(__x_copy._M_val()));
163#else
164 _M_insert_aux(__position, __x);
165#endif
166 }
167 }
168 else
169#if __cplusplus >= 201103L
170 _M_realloc_insert(begin() + (__position - cbegin()), __x);
171#else
172 _M_realloc_insert(__position, __x);
173#endif
174
175 return iterator(this->_M_impl._M_start + __n);
176 }
177
178 template<typename _Tp, typename _Alloc>
179 _GLIBCXX20_CONSTEXPR
180 typename vector<_Tp, _Alloc>::iterator
181 vector<_Tp, _Alloc>::
182 _M_erase(iterator __position)
183 {
184 if (__position + 1 != end())
185 _GLIBCXX_MOVE3(__position + 1, end(), __position);
186 --this->_M_impl._M_finish;
187 _Alloc_traits::destroy(this->_M_impl, this->_M_impl._M_finish);
188 _GLIBCXX_ASAN_ANNOTATE_SHRINK(1);
189 return __position;
190 }
191
192 template<typename _Tp, typename _Alloc>
193 _GLIBCXX20_CONSTEXPR
194 typename vector<_Tp, _Alloc>::iterator
195 vector<_Tp, _Alloc>::
196 _M_erase(iterator __first, iterator __last)
197 {
198 if (__first != __last)
199 {
200 if (__last != end())
201 _GLIBCXX_MOVE3(__last, end(), __first);
202 _M_erase_at_end(pos: __first.base() + (end() - __last));
203 }
204 return __first;
205 }
206
207 template<typename _Tp, typename _Alloc>
208 _GLIBCXX20_CONSTEXPR
209 vector<_Tp, _Alloc>&
210 vector<_Tp, _Alloc>::
211 operator=(const vector<_Tp, _Alloc>& __x)
212 {
213 if (std::__addressof(__x) != this)
214 {
215 _GLIBCXX_ASAN_ANNOTATE_REINIT;
216#if __cplusplus >= 201103L
217 if (_Alloc_traits::_S_propagate_on_copy_assign())
218 {
219 if (!_Alloc_traits::_S_always_equal()
220 && _M_get_Tp_allocator() != __x._M_get_Tp_allocator())
221 {
222 // replacement allocator cannot free existing storage
223 this->clear();
224 _M_deallocate(this->_M_impl._M_start,
225 this->_M_impl._M_end_of_storage
226 - this->_M_impl._M_start);
227 this->_M_impl._M_start = nullptr;
228 this->_M_impl._M_finish = nullptr;
229 this->_M_impl._M_end_of_storage = nullptr;
230 }
231 std::__alloc_on_copy(_M_get_Tp_allocator(),
232 __x._M_get_Tp_allocator());
233 }
234#endif
235 const size_type __xlen = __x.size();
236 if (__xlen > capacity())
237 {
238 pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(),
239 __x.end());
240 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
241 _M_get_Tp_allocator());
242 _M_deallocate(this->_M_impl._M_start,
243 this->_M_impl._M_end_of_storage
244 - this->_M_impl._M_start);
245 this->_M_impl._M_start = __tmp;
246 this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __xlen;
247 }
248 else if (size() >= __xlen)
249 {
250 std::_Destroy(std::copy(__x.begin(), __x.end(), begin()),
251 end(), _M_get_Tp_allocator());
252 }
253 else
254 {
255 std::copy(__x._M_impl._M_start, __x._M_impl._M_start + size(),
256 this->_M_impl._M_start);
257 std::__uninitialized_copy_a(__x._M_impl._M_start + size(),
258 __x._M_impl._M_finish,
259 this->_M_impl._M_finish,
260 _M_get_Tp_allocator());
261 }
262 this->_M_impl._M_finish = this->_M_impl._M_start + __xlen;
263 }
264 return *this;
265 }
266
267 template<typename _Tp, typename _Alloc>
268 _GLIBCXX20_CONSTEXPR
269 void
270 vector<_Tp, _Alloc>::
271 _M_fill_assign(size_t __n, const value_type& __val)
272 {
273 const size_type __sz = size();
274 if (__n > capacity())
275 {
276 if (__n <= __sz)
277 __builtin_unreachable();
278 vector __tmp(__n, __val, _M_get_Tp_allocator());
279 __tmp._M_impl._M_swap_data(this->_M_impl);
280 }
281 else if (__n > __sz)
282 {
283 std::fill(begin(), end(), __val);
284 const size_type __add = __n - __sz;
285 _GLIBCXX_ASAN_ANNOTATE_GROW(__add);
286 this->_M_impl._M_finish =
287 std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
288 __add, __val, _M_get_Tp_allocator());
289 _GLIBCXX_ASAN_ANNOTATE_GREW(__add);
290 }
291 else
292 _M_erase_at_end(pos: std::fill_n(this->_M_impl._M_start, __n, __val));
293 }
294
295 template<typename _Tp, typename _Alloc>
296 template<typename _InputIterator>
297 _GLIBCXX20_CONSTEXPR
298 void
299 vector<_Tp, _Alloc>::
300 _M_assign_aux(_InputIterator __first, _InputIterator __last,
301 std::input_iterator_tag)
302 {
303 pointer __cur(this->_M_impl._M_start);
304 for (; __first != __last && __cur != this->_M_impl._M_finish;
305 ++__cur, (void)++__first)
306 *__cur = *__first;
307 if (__first == __last)
308 _M_erase_at_end(pos: __cur);
309 else
310 _M_range_insert(end(), __first, __last,
311 std::__iterator_category(__first));
312 }
313
314 template<typename _Tp, typename _Alloc>
315 template<typename _ForwardIterator>
316 _GLIBCXX20_CONSTEXPR
317 void
318 vector<_Tp, _Alloc>::
319 _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
320 std::forward_iterator_tag)
321 {
322 const size_type __sz = size();
323 const size_type __len = std::distance(__first, __last);
324
325 if (__len > capacity())
326 {
327 if (__len <= __sz)
328 __builtin_unreachable();
329
330 _S_check_init_len(n: __len, a: _M_get_Tp_allocator());
331 pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
332 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
333 _M_get_Tp_allocator());
334 _GLIBCXX_ASAN_ANNOTATE_REINIT;
335 _M_deallocate(this->_M_impl._M_start,
336 this->_M_impl._M_end_of_storage
337 - this->_M_impl._M_start);
338 this->_M_impl._M_start = __tmp;
339 this->_M_impl._M_finish = this->_M_impl._M_start + __len;
340 this->_M_impl._M_end_of_storage = this->_M_impl._M_finish;
341 }
342 else if (__sz >= __len)
343 _M_erase_at_end(pos: std::copy(__first, __last, this->_M_impl._M_start));
344 else
345 {
346 _ForwardIterator __mid = __first;
347 std::advance(__mid, __sz);
348 std::copy(__first, __mid, this->_M_impl._M_start);
349 const size_type __attribute__((__unused__)) __n = __len - __sz;
350 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
351 this->_M_impl._M_finish =
352 std::__uninitialized_copy_a(__mid, __last,
353 this->_M_impl._M_finish,
354 _M_get_Tp_allocator());
355 _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
356 }
357 }
358
359#if __cplusplus >= 201103L
360 template<typename _Tp, typename _Alloc>
361 _GLIBCXX20_CONSTEXPR
362 auto
363 vector<_Tp, _Alloc>::
364 _M_insert_rval(const_iterator __position, value_type&& __v) -> iterator
365 {
366 const auto __n = __position - cbegin();
367 if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
368 if (__position == cend())
369 {
370 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
371 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
372 std::move(__v));
373 ++this->_M_impl._M_finish;
374 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
375 }
376 else
377 _M_insert_aux(begin() + __n, std::move(__v));
378 else
379 _M_realloc_insert(begin() + __n, std::move(__v));
380
381 return iterator(this->_M_impl._M_start + __n);
382 }
383
384 template<typename _Tp, typename _Alloc>
385 template<typename... _Args>
386 _GLIBCXX20_CONSTEXPR
387 auto
388 vector<_Tp, _Alloc>::
389 _M_emplace_aux(const_iterator __position, _Args&&... __args)
390 -> iterator
391 {
392 const auto __n = __position - cbegin();
393 if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
394 if (__position == cend())
395 {
396 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
397 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
398 std::forward<_Args>(__args)...);
399 ++this->_M_impl._M_finish;
400 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
401 }
402 else
403 {
404 // We need to construct a temporary because something in __args...
405 // could alias one of the elements of the container and so we
406 // need to use it before _M_insert_aux moves elements around.
407 _Temporary_value __tmp(this, std::forward<_Args>(__args)...);
408 _M_insert_aux(begin() + __n, std::move(__tmp._M_val()));
409 }
410 else
411 _M_realloc_insert(begin() + __n, std::forward<_Args>(__args)...);
412
413 return iterator(this->_M_impl._M_start + __n);
414 }
415
416 template<typename _Tp, typename _Alloc>
417 template<typename _Arg>
418 _GLIBCXX20_CONSTEXPR
419 void
420 vector<_Tp, _Alloc>::
421 _M_insert_aux(iterator __position, _Arg&& __arg)
422#else
423 template<typename _Tp, typename _Alloc>
424 void
425 vector<_Tp, _Alloc>::
426 _M_insert_aux(iterator __position, const _Tp& __x)
427#endif
428 {
429 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
430 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
431 _GLIBCXX_MOVE(*(this->_M_impl._M_finish - 1)));
432 ++this->_M_impl._M_finish;
433 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
434#if __cplusplus < 201103L
435 _Tp __x_copy = __x;
436#endif
437 _GLIBCXX_MOVE_BACKWARD3(__position.base(),
438 this->_M_impl._M_finish - 2,
439 this->_M_impl._M_finish - 1);
440#if __cplusplus < 201103L
441 *__position = __x_copy;
442#else
443 *__position = std::forward<_Arg>(__arg);
444#endif
445 }
446
447#if __cplusplus >= 201103L
448 template<typename _Tp, typename _Alloc>
449 template<typename... _Args>
450 _GLIBCXX20_CONSTEXPR
451 void
452 vector<_Tp, _Alloc>::
453 _M_realloc_insert(iterator __position, _Args&&... __args)
454#else
455 template<typename _Tp, typename _Alloc>
456 void
457 vector<_Tp, _Alloc>::
458 _M_realloc_insert(iterator __position, const _Tp& __x)
459#endif
460 {
461 const size_type __len = _M_check_len(n: 1u, s: "vector::_M_realloc_insert");
462 if (__len <= 0)
463 __builtin_unreachable ();
464 pointer __old_start = this->_M_impl._M_start;
465 pointer __old_finish = this->_M_impl._M_finish;
466 const size_type __elems_before = __position - begin();
467 pointer __new_start(this->_M_allocate(__len));
468 pointer __new_finish(__new_start);
469
470 {
471 _Guard_alloc __guard(__new_start, __len, *this);
472
473 // The order of the three operations is dictated by the C++11
474 // case, where the moves could alter a new element belonging
475 // to the existing vector. This is an issue only for callers
476 // taking the element by lvalue ref (see last bullet of C++11
477 // [res.on.arguments]).
478
479 // If this throws, the existing elements are unchanged.
480#if __cplusplus >= 201103L
481 _Alloc_traits::construct(this->_M_impl,
482 std::__to_address(__new_start + __elems_before),
483 std::forward<_Args>(__args)...);
484#else
485 _Alloc_traits::construct(this->_M_impl,
486 __new_start + __elems_before,
487 __x);
488#endif
489
490#if __cplusplus >= 201103L
491 if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
492 {
493 // Relocation cannot throw.
494 __new_finish = _S_relocate(first: __old_start, last: __position.base(),
495 result: __new_start, alloc&: _M_get_Tp_allocator());
496 ++__new_finish;
497 __new_finish = _S_relocate(first: __position.base(), last: __old_finish,
498 result: __new_finish, alloc&: _M_get_Tp_allocator());
499 }
500 else
501#endif
502 {
503 // RAII type to destroy initialized elements.
504 struct _Guard_elts
505 {
506 pointer _M_first, _M_last; // Elements to destroy
507 _Tp_alloc_type& _M_alloc;
508
509 _GLIBCXX20_CONSTEXPR
510 _Guard_elts(pointer __elt, _Tp_alloc_type& __a)
511 : _M_first(__elt), _M_last(__elt + 1), _M_alloc(__a)
512 { }
513
514 _GLIBCXX20_CONSTEXPR
515 ~_Guard_elts()
516 { std::_Destroy(_M_first, _M_last, _M_alloc); }
517
518 private:
519 _Guard_elts(const _Guard_elts&);
520 };
521
522 // Guard the new element so it will be destroyed if anything throws.
523 _Guard_elts __guard_elts(__new_start + __elems_before, _M_impl);
524
525 __new_finish = std::__uninitialized_move_if_noexcept_a(
526 __old_start, __position.base(),
527 __new_start, _M_get_Tp_allocator());
528
529 ++__new_finish;
530 // Guard everything before the new element too.
531 __guard_elts._M_first = __new_start;
532
533 __new_finish = std::__uninitialized_move_if_noexcept_a(
534 __position.base(), __old_finish,
535 __new_finish, _M_get_Tp_allocator());
536
537 // New storage has been fully initialized, destroy the old elements.
538 __guard_elts._M_first = __old_start;
539 __guard_elts._M_last = __old_finish;
540 }
541 __guard._M_storage = __old_start;
542 __guard._M_len = this->_M_impl._M_end_of_storage - __old_start;
543 }
544 // deallocate should be called before assignments to _M_impl,
545 // to avoid call-clobbering
546
547 this->_M_impl._M_start = __new_start;
548 this->_M_impl._M_finish = __new_finish;
549 this->_M_impl._M_end_of_storage = __new_start + __len;
550 }
551
552#if __cplusplus >= 201103L
553 template<typename _Tp, typename _Alloc>
554 template<typename... _Args>
555 _GLIBCXX20_CONSTEXPR
556 void
557 vector<_Tp, _Alloc>::
558 _M_realloc_append(_Args&&... __args)
559#else
560 template<typename _Tp, typename _Alloc>
561 void
562 vector<_Tp, _Alloc>::
563 _M_realloc_append(const _Tp& __x)
564#endif
565 {
566 const size_type __len = _M_check_len(n: 1u, s: "vector::_M_realloc_append");
567 if (__len <= 0)
568 __builtin_unreachable ();
569 pointer __old_start = this->_M_impl._M_start;
570 pointer __old_finish = this->_M_impl._M_finish;
571 const size_type __elems = end() - begin();
572 pointer __new_start(this->_M_allocate(__len));
573 pointer __new_finish(__new_start);
574
575 {
576 _Guard_alloc __guard(__new_start, __len, *this);
577
578 // The order of the three operations is dictated by the C++11
579 // case, where the moves could alter a new element belonging
580 // to the existing vector. This is an issue only for callers
581 // taking the element by lvalue ref (see last bullet of C++11
582 // [res.on.arguments]).
583
584 // If this throws, the existing elements are unchanged.
585#if __cplusplus >= 201103L
586 _Alloc_traits::construct(this->_M_impl,
587 std::__to_address(__new_start + __elems),
588 std::forward<_Args>(__args)...);
589#else
590 _Alloc_traits::construct(this->_M_impl,
591 __new_start + __elems,
592 __x);
593#endif
594
595#if __cplusplus >= 201103L
596 if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
597 {
598 // Relocation cannot throw.
599 __new_finish = _S_relocate(first: __old_start, last: __old_finish,
600 result: __new_start, alloc&: _M_get_Tp_allocator());
601 ++__new_finish;
602 }
603 else
604#endif
605 {
606 // RAII type to destroy initialized elements.
607 struct _Guard_elts
608 {
609 pointer _M_first, _M_last; // Elements to destroy
610 _Tp_alloc_type& _M_alloc;
611
612 _GLIBCXX20_CONSTEXPR
613 _Guard_elts(pointer __elt, _Tp_alloc_type& __a)
614 : _M_first(__elt), _M_last(__elt + 1), _M_alloc(__a)
615 { }
616
617 _GLIBCXX20_CONSTEXPR
618 ~_Guard_elts()
619 { std::_Destroy(_M_first, _M_last, _M_alloc); }
620
621 private:
622 _Guard_elts(const _Guard_elts&);
623 };
624
625 // Guard the new element so it will be destroyed if anything throws.
626 _Guard_elts __guard_elts(__new_start + __elems, _M_impl);
627
628 __new_finish = std::__uninitialized_move_if_noexcept_a(
629 __old_start, __old_finish,
630 __new_start, _M_get_Tp_allocator());
631
632 ++__new_finish;
633
634 // New storage has been fully initialized, destroy the old elements.
635 __guard_elts._M_first = __old_start;
636 __guard_elts._M_last = __old_finish;
637 }
638 __guard._M_storage = __old_start;
639 __guard._M_len = this->_M_impl._M_end_of_storage - __old_start;
640 }
641 // deallocate should be called before assignments to _M_impl,
642 // to avoid call-clobbering
643
644 this->_M_impl._M_start = __new_start;
645 this->_M_impl._M_finish = __new_finish;
646 this->_M_impl._M_end_of_storage = __new_start + __len;
647 }
648
649 template<typename _Tp, typename _Alloc>
650 _GLIBCXX20_CONSTEXPR
651 void
652 vector<_Tp, _Alloc>::
653 _M_fill_insert(iterator __position, size_type __n, const value_type& __x)
654 {
655 if (__n != 0)
656 {
657 if (size_type(this->_M_impl._M_end_of_storage
658 - this->_M_impl._M_finish) >= __n)
659 {
660#if __cplusplus < 201103L
661 value_type __x_copy = __x;
662#else
663 _Temporary_value __tmp(this, __x);
664 value_type& __x_copy = __tmp._M_val();
665#endif
666 const size_type __elems_after = end() - __position;
667 pointer __old_finish(this->_M_impl._M_finish);
668 if (__elems_after > __n)
669 {
670 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
671 std::__uninitialized_move_a(__old_finish - __n,
672 __old_finish,
673 __old_finish,
674 _M_get_Tp_allocator());
675 this->_M_impl._M_finish += __n;
676 _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
677 _GLIBCXX_MOVE_BACKWARD3(__position.base(),
678 __old_finish - __n, __old_finish);
679 std::fill(__position.base(), __position.base() + __n,
680 __x_copy);
681 }
682 else
683 {
684 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
685 this->_M_impl._M_finish =
686 std::__uninitialized_fill_n_a(__old_finish,
687 __n - __elems_after,
688 __x_copy,
689 _M_get_Tp_allocator());
690 _GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
691 std::__uninitialized_move_a(__position.base(), __old_finish,
692 this->_M_impl._M_finish,
693 _M_get_Tp_allocator());
694 this->_M_impl._M_finish += __elems_after;
695 _GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
696 std::fill(__position.base(), __old_finish, __x_copy);
697 }
698 }
699 else
700 {
701 // Make local copies of these members because the compiler thinks
702 // the allocator can alter them if 'this' is globally reachable.
703 pointer __old_start = this->_M_impl._M_start;
704 pointer __old_finish = this->_M_impl._M_finish;
705 const pointer __pos = __position.base();
706
707 const size_type __len =
708 _M_check_len(__n, s: "vector::_M_fill_insert");
709 const size_type __elems_before = __pos - __old_start;
710 pointer __new_start(this->_M_allocate(__len));
711 pointer __new_finish(__new_start);
712 __try
713 {
714 // See _M_realloc_insert above.
715 std::__uninitialized_fill_n_a(__new_start + __elems_before,
716 __n, __x,
717 _M_get_Tp_allocator());
718 __new_finish = pointer();
719
720 __new_finish
721 = std::__uninitialized_move_if_noexcept_a
722 (__old_start, __pos, __new_start, _M_get_Tp_allocator());
723
724 __new_finish += __n;
725
726 __new_finish
727 = std::__uninitialized_move_if_noexcept_a
728 (__pos, __old_finish, __new_finish, _M_get_Tp_allocator());
729 }
730 __catch(...)
731 {
732 if (!__new_finish)
733 std::_Destroy(__new_start + __elems_before,
734 __new_start + __elems_before + __n,
735 _M_get_Tp_allocator());
736 else
737 std::_Destroy(__new_start, __new_finish,
738 _M_get_Tp_allocator());
739 _M_deallocate(__new_start, __len);
740 __throw_exception_again;
741 }
742 std::_Destroy(__old_start, __old_finish, _M_get_Tp_allocator());
743 _GLIBCXX_ASAN_ANNOTATE_REINIT;
744 _M_deallocate(__old_start,
745 this->_M_impl._M_end_of_storage - __old_start);
746 this->_M_impl._M_start = __new_start;
747 this->_M_impl._M_finish = __new_finish;
748 this->_M_impl._M_end_of_storage = __new_start + __len;
749 }
750 }
751 }
752
753#if __cplusplus >= 201103L
754 template<typename _Tp, typename _Alloc>
755 _GLIBCXX20_CONSTEXPR
756 void
757 vector<_Tp, _Alloc>::
758 _M_default_append(size_type __n)
759 {
760 if (__n != 0)
761 {
762 const size_type __size = size();
763 size_type __navail = size_type(this->_M_impl._M_end_of_storage
764 - this->_M_impl._M_finish);
765
766 if (__size > max_size() || __navail > max_size() - __size)
767 __builtin_unreachable();
768
769 if (__navail >= __n)
770 {
771 if (!this->_M_impl._M_finish)
772 __builtin_unreachable();
773
774 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
775 this->_M_impl._M_finish =
776 std::__uninitialized_default_n_a(this->_M_impl._M_finish,
777 __n, _M_get_Tp_allocator());
778 _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
779 }
780 else
781 {
782 // Make local copies of these members because the compiler thinks
783 // the allocator can alter them if 'this' is globally reachable.
784 pointer __old_start = this->_M_impl._M_start;
785 pointer __old_finish = this->_M_impl._M_finish;
786
787 const size_type __len =
788 _M_check_len(__n, s: "vector::_M_default_append");
789 pointer __new_start(this->_M_allocate(__len));
790
791 {
792 _Guard_alloc __guard(__new_start, __len, *this);
793
794 std::__uninitialized_default_n_a(__new_start + __size, __n,
795 _M_get_Tp_allocator());
796
797 if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
798 {
799 _S_relocate(first: __old_start, last: __old_finish,
800 result: __new_start, alloc&: _M_get_Tp_allocator());
801 }
802 else
803 {
804 // RAII type to destroy initialized elements.
805 struct _Guard_elts
806 {
807 pointer _M_first, _M_last; // Elements to destroy
808 _Tp_alloc_type& _M_alloc;
809
810 _GLIBCXX20_CONSTEXPR
811 _Guard_elts(pointer __first, size_type __n,
812 _Tp_alloc_type& __a)
813 : _M_first(__first), _M_last(__first + __n), _M_alloc(__a)
814 { }
815
816 _GLIBCXX20_CONSTEXPR
817 ~_Guard_elts()
818 { std::_Destroy(_M_first, _M_last, _M_alloc); }
819
820 private:
821 _Guard_elts(const _Guard_elts&);
822 };
823 _Guard_elts __guard_elts(__new_start + __size, __n, _M_impl);
824
825 std::__uninitialized_move_if_noexcept_a(
826 __old_start, __old_finish, __new_start,
827 _M_get_Tp_allocator());
828
829 __guard_elts._M_first = __old_start;
830 __guard_elts._M_last = __old_finish;
831 }
832 _GLIBCXX_ASAN_ANNOTATE_REINIT;
833 __guard._M_storage = __old_start;
834 __guard._M_len = this->_M_impl._M_end_of_storage - __old_start;
835 }
836 // deallocate should be called before assignments to _M_impl,
837 // to avoid call-clobbering
838
839 this->_M_impl._M_start = __new_start;
840 this->_M_impl._M_finish = __new_start + __size + __n;
841 this->_M_impl._M_end_of_storage = __new_start + __len;
842 }
843 }
844 }
845
846 template<typename _Tp, typename _Alloc>
847 _GLIBCXX20_CONSTEXPR
848 bool
849 vector<_Tp, _Alloc>::
850 _M_shrink_to_fit()
851 {
852 if (capacity() == size())
853 return false;
854 _GLIBCXX_ASAN_ANNOTATE_REINIT;
855 return std::__shrink_to_fit_aux<vector>::_S_do_it(*this);
856 }
857#endif
858
859 template<typename _Tp, typename _Alloc>
860 template<typename _InputIterator>
861 _GLIBCXX20_CONSTEXPR
862 void
863 vector<_Tp, _Alloc>::
864 _M_range_insert(iterator __pos, _InputIterator __first,
865 _InputIterator __last, std::input_iterator_tag)
866 {
867 if (__pos == end())
868 {
869 for (; __first != __last; ++__first)
870 insert(end(), *__first);
871 }
872 else if (__first != __last)
873 {
874 vector __tmp(__first, __last, _M_get_Tp_allocator());
875 insert(__pos,
876 _GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.begin()),
877 _GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.end()));
878 }
879 }
880
881 template<typename _Tp, typename _Alloc>
882 template<typename _ForwardIterator>
883 _GLIBCXX20_CONSTEXPR
884 void
885 vector<_Tp, _Alloc>::
886 _M_range_insert(iterator __position, _ForwardIterator __first,
887 _ForwardIterator __last, std::forward_iterator_tag)
888 {
889 if (__first != __last)
890 {
891 const size_type __n = std::distance(__first, __last);
892 if (size_type(this->_M_impl._M_end_of_storage
893 - this->_M_impl._M_finish) >= __n)
894 {
895 const size_type __elems_after = end() - __position;
896 pointer __old_finish(this->_M_impl._M_finish);
897 if (__elems_after > __n)
898 {
899 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
900 std::__uninitialized_move_a(this->_M_impl._M_finish - __n,
901 this->_M_impl._M_finish,
902 this->_M_impl._M_finish,
903 _M_get_Tp_allocator());
904 this->_M_impl._M_finish += __n;
905 _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
906 _GLIBCXX_MOVE_BACKWARD3(__position.base(),
907 __old_finish - __n, __old_finish);
908 std::copy(__first, __last, __position);
909 }
910 else
911 {
912 _ForwardIterator __mid = __first;
913 std::advance(__mid, __elems_after);
914 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
915 std::__uninitialized_copy_a(__mid, __last,
916 this->_M_impl._M_finish,
917 _M_get_Tp_allocator());
918 this->_M_impl._M_finish += __n - __elems_after;
919 _GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
920 std::__uninitialized_move_a(__position.base(),
921 __old_finish,
922 this->_M_impl._M_finish,
923 _M_get_Tp_allocator());
924 this->_M_impl._M_finish += __elems_after;
925 _GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
926 std::copy(__first, __mid, __position);
927 }
928 }
929 else
930 {
931 // Make local copies of these members because the compiler
932 // thinks the allocator can alter them if 'this' is globally
933 // reachable.
934 pointer __old_start = this->_M_impl._M_start;
935 pointer __old_finish = this->_M_impl._M_finish;
936
937 const size_type __len =
938 _M_check_len(__n, s: "vector::_M_range_insert");
939#if __cplusplus < 201103L
940 if (__len < (__n + (__old_finish - __old_start)))
941 __builtin_unreachable();
942#endif
943
944 pointer __new_start(this->_M_allocate(__len));
945 pointer __new_finish(__new_start);
946 __try
947 {
948 __new_finish
949 = std::__uninitialized_move_if_noexcept_a
950 (__old_start, __position.base(),
951 __new_start, _M_get_Tp_allocator());
952 __new_finish
953 = std::__uninitialized_copy_a(__first, __last,
954 __new_finish,
955 _M_get_Tp_allocator());
956 __new_finish
957 = std::__uninitialized_move_if_noexcept_a
958 (__position.base(), __old_finish,
959 __new_finish, _M_get_Tp_allocator());
960 }
961 __catch(...)
962 {
963 std::_Destroy(__new_start, __new_finish,
964 _M_get_Tp_allocator());
965 _M_deallocate(__new_start, __len);
966 __throw_exception_again;
967 }
968 std::_Destroy(__old_start, __old_finish,
969 _M_get_Tp_allocator());
970 _GLIBCXX_ASAN_ANNOTATE_REINIT;
971 _M_deallocate(__old_start,
972 this->_M_impl._M_end_of_storage - __old_start);
973 this->_M_impl._M_start = __new_start;
974 this->_M_impl._M_finish = __new_finish;
975 this->_M_impl._M_end_of_storage = __new_start + __len;
976 }
977 }
978 }
979
980#if __glibcxx_containers_ranges // C++ >= 23
981 template<typename _Tp, typename _Alloc>
982 template<__detail::__container_compatible_range<_Tp> _Rg>
983 constexpr auto
984 vector<_Tp, _Alloc>::
985 insert_range(const_iterator __pos, _Rg&& __rg)
986 -> iterator
987 {
988 if (__pos == cend())
989 {
990 const auto __ins_idx = size();
991 append_range(std::forward<_Rg>(__rg));
992 return begin() + __ins_idx;
993 }
994
995 if constexpr (ranges::forward_range<_Rg>)
996 {
997 const auto __ins_idx = __pos - cbegin();
998 // Number of new elements to insert:
999 const auto __n = size_type(ranges::distance(__rg));
1000 if (__n == 0)
1001 return begin() + __ins_idx;
1002
1003 // Start of existing elements:
1004 pointer __old_start = this->_M_impl._M_start;
1005 // End of existing elements:
1006 pointer __old_finish = this->_M_impl._M_finish;
1007 // Insertion point:
1008 pointer __ins = __old_start + __ins_idx;
1009 // Number of elements that can fit in unused capacity:
1010 const auto __cap = this->_M_impl._M_end_of_storage - __old_finish;
1011 if (__cap >= __n)
1012 {
1013 // Number of existing elements after insertion point:
1014 const size_type __elems_after = cend() - __pos;
1015 if (__elems_after > __n)
1016 {
1017 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
1018 std::__uninitialized_move_a(__old_finish - __n,
1019 __old_finish,
1020 __old_finish,
1021 _M_get_Tp_allocator());
1022 this->_M_impl._M_finish += __n;
1023 _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
1024 std::move_backward(__ins, __old_finish - __n, __old_finish);
1025 ranges::copy(__rg, __ins);
1026 }
1027 else
1028 {
1029 auto __first = ranges::begin(__rg);
1030 const auto __last = ranges::end(__rg);
1031 auto __mid = ranges::next(__first, __elems_after);
1032 _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
1033 _Base::_M_append_range(ranges::subrange(__mid, __last));
1034 _GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
1035 std::__uninitialized_move_a(__ins, __old_finish,
1036 this->_M_impl._M_finish,
1037 _M_get_Tp_allocator());
1038 this->_M_impl._M_finish += __elems_after;
1039 _GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
1040 ranges::copy(__first, __mid, __ins);
1041 }
1042 }
1043 else // Reallocate
1044 {
1045 const size_type __len
1046 = _M_check_len(__n, "vector::insert_range");
1047
1048 struct _Guard : _Guard_alloc
1049 {
1050 // End of elements to destroy:
1051 pointer _M_finish = _Guard_alloc::_M_storage;
1052
1053 using _Guard_alloc::_Guard_alloc;
1054
1055 constexpr
1056 ~_Guard()
1057 {
1058 std::_Destroy(this->_M_storage, _M_finish,
1059 this->_M_vect._M_get_Tp_allocator());
1060 }
1061 };
1062
1063 // Allocate new storage:
1064 pointer __new_start(this->_M_allocate(__len));
1065 _Guard __guard(__new_start, __len, *this);
1066
1067 auto& __alloc = _M_get_Tp_allocator();
1068
1069 // Populate the new storage in three steps. After each step,
1070 // __guard owns the new storage and any elements that have
1071 // been constructed there.
1072
1073 // Move elements from before insertion point to new storage:
1074 __guard._M_finish
1075 = std::__uninitialized_move_if_noexcept_a(
1076 __old_start, __ins, __new_start, __alloc);
1077
1078 // Append new elements to new storage:
1079 _Base::_M_append_range_to(__rg, __guard._M_finish);
1080
1081 // Move elements from after insertion point to new storage:
1082 __guard._M_finish
1083 = std::__uninitialized_move_if_noexcept_a(
1084 __ins, __old_finish, __guard._M_finish, __alloc);
1085
1086 _GLIBCXX_ASAN_ANNOTATE_REINIT; // Creates _Asan::_Reinit.
1087
1088 // All elements are in the new storage, exchange ownership
1089 // with __guard so that it cleans up the old storage:
1090 this->_M_impl._M_start = __guard._M_storage;
1091 this->_M_impl._M_finish = __guard._M_finish;
1092 this->_M_impl._M_end_of_storage = __new_start + __len;
1093 __guard._M_storage = __old_start;
1094 __guard._M_finish = __old_finish;
1095 __guard._M_len = (__old_finish - __old_start) + __cap;
1096 // _Asan::_Reinit destructor marks unused capacity.
1097 // _Guard destructor destroys [old_start,old_finish).
1098 // _Guard_alloc destructor frees [old_start,old_start+len).
1099 }
1100 return begin() + __ins_idx;
1101 }
1102 else
1103 return insert_range(__pos, vector(from_range, std::forward<_Rg>(__rg),
1104 _M_get_Tp_allocator()));
1105 }
1106#endif // containers_ranges
1107
1108 // vector<bool>
1109 template<typename _Alloc>
1110 _GLIBCXX20_CONSTEXPR
1111 void
1112 vector<bool, _Alloc>::
1113 _M_reallocate(size_type __n)
1114 {
1115 const iterator __begin = begin(), __end = end();
1116 if (size_type(__end - __begin) > __n)
1117 __builtin_unreachable();
1118 _Bit_pointer __q = this->_M_allocate(__n);
1119 iterator __start(std::__addressof(*__q), 0);
1120 iterator __finish(_M_copy_aligned(first: __begin, last: __end, result: __start));
1121 this->_M_deallocate();
1122 this->_M_impl._M_start = __start;
1123 this->_M_impl._M_finish = __finish;
1124 this->_M_impl._M_end_of_storage = __q + _S_nword(__n);
1125 }
1126
1127 template<typename _Alloc>
1128 _GLIBCXX20_CONSTEXPR
1129 void
1130 vector<bool, _Alloc>::
1131 _M_fill_insert(iterator __position, size_type __n, bool __x)
1132 {
1133 if (__n == 0)
1134 return;
1135 if (capacity() - size() >= __n)
1136 {
1137 std::copy_backward(__position, end(),
1138 this->_M_impl._M_finish + difference_type(__n));
1139 std::fill(first: __position, last: __position + difference_type(__n), value: __x);
1140 this->_M_impl._M_finish += difference_type(__n);
1141 }
1142 else
1143 {
1144 const size_type __len =
1145 _M_check_len(__n, s: "vector<bool>::_M_fill_insert");
1146 iterator __begin = begin(), __end = end();
1147 _Bit_pointer __q = this->_M_allocate(__len);
1148 iterator __start(std::__addressof(*__q), 0);
1149 iterator __i = _M_copy_aligned(first: __begin, last: __position, result: __start);
1150 std::fill(first: __i, last: __i + difference_type(__n), value: __x);
1151 iterator __finish = std::copy(first: __position, last: __end,
1152 result: __i + difference_type(__n));
1153 this->_M_deallocate();
1154 this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
1155 this->_M_impl._M_start = __start;
1156 this->_M_impl._M_finish = __finish;
1157 }
1158 }
1159
1160 template<typename _Alloc>
1161 template<typename _ForwardIterator>
1162 _GLIBCXX20_CONSTEXPR
1163 void
1164 vector<bool, _Alloc>::
1165 _M_insert_range(iterator __position, _ForwardIterator __first,
1166 _ForwardIterator __last, std::forward_iterator_tag)
1167 {
1168 if (__first != __last)
1169 {
1170 size_type __n = std::distance(__first, __last);
1171 if (capacity() - size() >= __n)
1172 {
1173 std::copy_backward(__position, end(),
1174 this->_M_impl._M_finish
1175 + difference_type(__n));
1176 std::copy(__first, __last, __position);
1177 this->_M_impl._M_finish += difference_type(__n);
1178 }
1179 else
1180 {
1181 const size_type __len =
1182 _M_check_len(__n, s: "vector<bool>::_M_insert_range");
1183 const iterator __begin = begin(), __end = end();
1184 _Bit_pointer __q = this->_M_allocate(__len);
1185 iterator __start(std::__addressof(*__q), 0);
1186 iterator __i = _M_copy_aligned(first: __begin, last: __position, result: __start);
1187 __i = std::copy(__first, __last, __i);
1188 iterator __finish = std::copy(first: __position, last: __end, result: __i);
1189 this->_M_deallocate();
1190 this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
1191 this->_M_impl._M_start = __start;
1192 this->_M_impl._M_finish = __finish;
1193 }
1194 }
1195 }
1196
1197 template<typename _Alloc>
1198 _GLIBCXX20_CONSTEXPR
1199 void
1200 vector<bool, _Alloc>::
1201 _M_insert_aux(iterator __position, bool __x)
1202 {
1203 if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_addr())
1204 {
1205 std::copy_backward(__position, this->_M_impl._M_finish,
1206 this->_M_impl._M_finish + 1);
1207 *__position = __x;
1208 ++this->_M_impl._M_finish;
1209 }
1210 else
1211 {
1212 const size_type __len =
1213 _M_check_len(n: size_type(1), s: "vector<bool>::_M_insert_aux");
1214 _Bit_pointer __q = this->_M_allocate(__len);
1215 iterator __start(std::__addressof(*__q), 0);
1216 iterator __i = _M_copy_aligned(first: begin(), last: __position, result: __start);
1217 *__i++ = __x;
1218 iterator __finish = std::copy(__position, end(), __i);
1219 this->_M_deallocate();
1220 this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
1221 this->_M_impl._M_start = __start;
1222 this->_M_impl._M_finish = __finish;
1223 }
1224 }
1225
1226 template<typename _Alloc>
1227 _GLIBCXX20_CONSTEXPR
1228 typename vector<bool, _Alloc>::iterator
1229 vector<bool, _Alloc>::
1230 _M_erase(iterator __position)
1231 {
1232 if (__position + 1 != end())
1233 std::copy(__position + 1, end(), __position);
1234 --this->_M_impl._M_finish;
1235 return __position;
1236 }
1237
1238 template<typename _Alloc>
1239 _GLIBCXX20_CONSTEXPR
1240 typename vector<bool, _Alloc>::iterator
1241 vector<bool, _Alloc>::
1242 _M_erase(iterator __first, iterator __last)
1243 {
1244 if (__first != __last)
1245 _M_erase_at_end(pos: std::copy(__last, end(), __first));
1246 return __first;
1247 }
1248
1249#if __cplusplus >= 201103L
1250 template<typename _Alloc>
1251 _GLIBCXX20_CONSTEXPR
1252 bool
1253 vector<bool, _Alloc>::
1254 _M_shrink_to_fit()
1255 {
1256 if (capacity() - size() < int(_S_word_bit))
1257 return false;
1258 __try
1259 {
1260 if (size_type __n = size())
1261 _M_reallocate(__n);
1262 else
1263 {
1264 this->_M_deallocate();
1265 this->_M_impl._M_reset();
1266 }
1267 return true;
1268 }
1269 __catch(...)
1270 { return false; }
1271 }
1272#endif
1273
1274_GLIBCXX_END_NAMESPACE_CONTAINER
1275_GLIBCXX_END_NAMESPACE_VERSION
1276} // namespace std
1277
1278#if __cplusplus >= 201103L
1279
1280namespace std _GLIBCXX_VISIBILITY(default)
1281{
1282_GLIBCXX_BEGIN_NAMESPACE_VERSION
1283
1284 template<typename _Alloc>
1285 size_t
1286 hash<_GLIBCXX_STD_C::vector<bool, _Alloc>>::
1287 operator()(const _GLIBCXX_STD_C::vector<bool, _Alloc>& __b) const noexcept
1288 {
1289 size_t __hash = 0;
1290 const size_t __words = __b.size() / _S_word_bit;
1291 if (__words)
1292 {
1293 const size_t __clength = __words * sizeof(_Bit_type);
1294 __hash = std::_Hash_impl::hash(__b._M_impl._M_start._M_p, __clength);
1295 }
1296
1297 const size_t __extrabits = __b.size() % _S_word_bit;
1298 if (__extrabits)
1299 {
1300 _Bit_type __hiword = *__b._M_impl._M_finish._M_p;
1301 __hiword &= ~((~static_cast<_Bit_type>(0)) << __extrabits);
1302
1303 const size_t __clength
1304 = (__extrabits + __CHAR_BIT__ - 1) / __CHAR_BIT__;
1305 if (__words)
1306 __hash = std::_Hash_impl::hash(ptr: &__hiword, __clength, seed: __hash);
1307 else
1308 __hash = std::_Hash_impl::hash(ptr: &__hiword, __clength);
1309 }
1310
1311 return __hash;
1312 }
1313
1314_GLIBCXX_END_NAMESPACE_VERSION
1315} // namespace std
1316
1317#endif // C++11
1318
1319#undef _GLIBCXX_ASAN_ANNOTATE_REINIT
1320#undef _GLIBCXX_ASAN_ANNOTATE_GROW
1321#undef _GLIBCXX_ASAN_ANNOTATE_GREW
1322#undef _GLIBCXX_ASAN_ANNOTATE_SHRINK
1323
1324#endif /* _VECTOR_TCC */
1325