1// vector<bool> specialization -*- C++ -*-
2
3// Copyright (C) 2001-2024 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) 1996-1999
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/stl_bvector.h
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 _STL_BVECTOR_H
57#define _STL_BVECTOR_H 1
58
59#ifndef _GLIBCXX_ALWAYS_INLINE
60#define _GLIBCXX_ALWAYS_INLINE inline __attribute__((__always_inline__))
61#endif
62
63#if __cplusplus >= 201103L
64#include <initializer_list>
65#include <bits/functional_hash.h>
66#endif
67
68namespace std _GLIBCXX_VISIBILITY(default)
69{
70_GLIBCXX_BEGIN_NAMESPACE_VERSION
71
72 typedef unsigned long _Bit_type;
73 enum { _S_word_bit = int(__CHAR_BIT__ * sizeof(_Bit_type)) };
74
75 __attribute__((__nonnull__))
76 _GLIBCXX20_CONSTEXPR
77 void
78 __fill_bvector_n(_Bit_type*, size_t, bool) _GLIBCXX_NOEXCEPT;
79
80_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
81
82 struct _Bit_reference
83 {
84 _Bit_type * _M_p;
85 _Bit_type _M_mask;
86
87 _GLIBCXX20_CONSTEXPR
88 _Bit_reference(_Bit_type * __x, _Bit_type __y)
89 : _M_p(__x), _M_mask(__y) { }
90
91 _GLIBCXX20_CONSTEXPR
92 _Bit_reference() _GLIBCXX_NOEXCEPT : _M_p(0), _M_mask(0) { }
93
94#if __cplusplus >= 201103L
95 _Bit_reference(const _Bit_reference&) = default;
96#endif
97
98 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
99 operator bool() const _GLIBCXX_NOEXCEPT
100 { return !!(*_M_p & _M_mask); }
101
102 _GLIBCXX20_CONSTEXPR
103 _Bit_reference&
104 operator=(bool __x) _GLIBCXX_NOEXCEPT
105 {
106 if (__x)
107 *_M_p |= _M_mask;
108 else
109 *_M_p &= ~_M_mask;
110 return *this;
111 }
112
113#if __cplusplus > 202002L
114 constexpr const _Bit_reference&
115 operator=(bool __x) const noexcept
116 {
117 if (__x)
118 *_M_p |= _M_mask;
119 else
120 *_M_p &= ~_M_mask;
121 return *this;
122 }
123#endif // C++23
124
125 _GLIBCXX20_CONSTEXPR
126 _Bit_reference&
127 operator=(const _Bit_reference& __x) _GLIBCXX_NOEXCEPT
128 { return *this = bool(__x); }
129
130 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
131 bool
132 operator==(const _Bit_reference& __x) const
133 { return bool(*this) == bool(__x); }
134
135 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
136 bool
137 operator<(const _Bit_reference& __x) const
138 { return !bool(*this) && bool(__x); }
139
140 _GLIBCXX20_CONSTEXPR
141 void
142 flip() _GLIBCXX_NOEXCEPT
143 { *_M_p ^= _M_mask; }
144
145#if __cplusplus >= 201103L
146 _GLIBCXX20_CONSTEXPR
147 friend void
148 swap(_Bit_reference __x, _Bit_reference __y) noexcept
149 {
150 bool __tmp = __x;
151 __x = __y;
152 __y = __tmp;
153 }
154
155 _GLIBCXX20_CONSTEXPR
156 friend void
157 swap(_Bit_reference __x, bool& __y) noexcept
158 {
159 bool __tmp = __x;
160 __x = __y;
161 __y = __tmp;
162 }
163
164 _GLIBCXX20_CONSTEXPR
165 friend void
166 swap(bool& __x, _Bit_reference __y) noexcept
167 {
168 bool __tmp = __x;
169 __x = __y;
170 __y = __tmp;
171 }
172#endif
173 };
174
175// Ignore warnings about std::iterator.
176#pragma GCC diagnostic push
177#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
178 struct _Bit_iterator_base
179 : public std::iterator<std::random_access_iterator_tag, bool>
180 {
181 _Bit_type * _M_p;
182 unsigned int _M_offset;
183
184 _GLIBCXX20_CONSTEXPR _GLIBCXX_ALWAYS_INLINE
185 void
186 _M_assume_normalized() const
187 {
188#if __has_attribute(__assume__) && !defined(__clang__)
189 unsigned int __ofst = _M_offset;
190 __attribute__ ((__assume__ (__ofst < unsigned(_S_word_bit))));
191#endif
192 }
193
194 _GLIBCXX20_CONSTEXPR
195 _Bit_iterator_base(_Bit_type * __x, unsigned int __y)
196 : _M_p(__x), _M_offset(__y) { }
197
198 _GLIBCXX20_CONSTEXPR
199 void
200 _M_bump_up()
201 {
202 _M_assume_normalized();
203 if (_M_offset++ == int(_S_word_bit) - 1)
204 {
205 _M_offset = 0;
206 ++_M_p;
207 }
208 }
209
210 _GLIBCXX20_CONSTEXPR
211 void
212 _M_bump_down()
213 {
214 _M_assume_normalized();
215 if (_M_offset-- == 0)
216 {
217 _M_offset = int(_S_word_bit) - 1;
218 --_M_p;
219 }
220 }
221
222 _GLIBCXX20_CONSTEXPR
223 void
224 _M_incr(ptrdiff_t __i)
225 {
226 _M_assume_normalized();
227 difference_type __n = __i + _M_offset;
228 _M_p += __n / int(_S_word_bit);
229 __n = __n % int(_S_word_bit);
230 if (__n < 0)
231 {
232 __n += int(_S_word_bit);
233 --_M_p;
234 }
235 _M_offset = static_cast<unsigned int>(__n);
236 }
237
238 _GLIBCXX_NODISCARD
239 friend _GLIBCXX20_CONSTEXPR bool
240 operator==(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
241 {
242 __x._M_assume_normalized();
243 __y._M_assume_normalized();
244 return __x._M_p == __y._M_p && __x._M_offset == __y._M_offset;
245 }
246
247#if __cpp_lib_three_way_comparison
248 [[nodiscard]]
249 friend constexpr strong_ordering
250 operator<=>(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
251 noexcept
252 {
253 __x._M_assume_normalized();
254 __y._M_assume_normalized();
255 if (const auto __cmp = __x._M_p <=> __y._M_p; __cmp != 0)
256 return __cmp;
257 return __x._M_offset <=> __y._M_offset;
258 }
259#else
260 _GLIBCXX_NODISCARD
261 friend bool
262 operator<(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
263 {
264 __x._M_assume_normalized();
265 __y._M_assume_normalized();
266 return __x._M_p < __y._M_p
267 || (__x._M_p == __y._M_p && __x._M_offset < __y._M_offset);
268 }
269
270 _GLIBCXX_NODISCARD
271 friend bool
272 operator!=(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
273 { return !(__x == __y); }
274
275 _GLIBCXX_NODISCARD
276 friend bool
277 operator>(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
278 { return __y < __x; }
279
280 _GLIBCXX_NODISCARD
281 friend bool
282 operator<=(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
283 { return !(__y < __x); }
284
285 _GLIBCXX_NODISCARD
286 friend bool
287 operator>=(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
288 { return !(__x < __y); }
289#endif // three-way comparison
290
291 friend _GLIBCXX20_CONSTEXPR ptrdiff_t
292 operator-(const _Bit_iterator_base& __x, const _Bit_iterator_base& __y)
293 {
294 __x._M_assume_normalized();
295 __y._M_assume_normalized();
296 return (int(_S_word_bit) * (__x._M_p - __y._M_p)
297 + __x._M_offset - __y._M_offset);
298 }
299 };
300#pragma GCC diagnostic pop
301
302 struct _Bit_iterator : public _Bit_iterator_base
303 {
304 typedef _Bit_reference reference;
305#if __cplusplus > 201703L
306 typedef void pointer;
307#else
308 typedef _Bit_reference* pointer;
309#endif
310 typedef _Bit_iterator iterator;
311
312 _GLIBCXX20_CONSTEXPR
313 _Bit_iterator() : _Bit_iterator_base(0, 0) { }
314
315 _GLIBCXX20_CONSTEXPR
316 _Bit_iterator(_Bit_type * __x, unsigned int __y)
317 : _Bit_iterator_base(__x, __y) { }
318
319 _GLIBCXX20_CONSTEXPR
320 iterator
321 _M_const_cast() const
322 { return *this; }
323
324 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
325 reference
326 operator*() const
327 {
328 _M_assume_normalized();
329 return reference(_M_p, 1UL << _M_offset);
330 }
331
332 _GLIBCXX20_CONSTEXPR
333 iterator&
334 operator++()
335 {
336 _M_bump_up();
337 return *this;
338 }
339
340 _GLIBCXX20_CONSTEXPR
341 iterator
342 operator++(int)
343 {
344 iterator __tmp = *this;
345 _M_bump_up();
346 return __tmp;
347 }
348
349 _GLIBCXX20_CONSTEXPR
350 iterator&
351 operator--()
352 {
353 _M_bump_down();
354 return *this;
355 }
356
357 _GLIBCXX20_CONSTEXPR
358 iterator
359 operator--(int)
360 {
361 iterator __tmp = *this;
362 _M_bump_down();
363 return __tmp;
364 }
365
366 _GLIBCXX20_CONSTEXPR
367 iterator&
368 operator+=(difference_type __i)
369 {
370 _M_incr(__i);
371 return *this;
372 }
373
374 _GLIBCXX20_CONSTEXPR
375 iterator&
376 operator-=(difference_type __i)
377 {
378 *this += -__i;
379 return *this;
380 }
381
382 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
383 reference
384 operator[](difference_type __i) const
385 { return *(*this + __i); }
386
387 _GLIBCXX_NODISCARD
388 friend _GLIBCXX20_CONSTEXPR iterator
389 operator+(const iterator& __x, difference_type __n)
390 {
391 iterator __tmp = __x;
392 __tmp += __n;
393 return __tmp;
394 }
395
396 _GLIBCXX_NODISCARD
397 friend _GLIBCXX20_CONSTEXPR iterator
398 operator+(difference_type __n, const iterator& __x)
399 { return __x + __n; }
400
401 _GLIBCXX_NODISCARD
402 friend _GLIBCXX20_CONSTEXPR iterator
403 operator-(const iterator& __x, difference_type __n)
404 {
405 iterator __tmp = __x;
406 __tmp -= __n;
407 return __tmp;
408 }
409 };
410
411 struct _Bit_const_iterator : public _Bit_iterator_base
412 {
413 typedef bool reference;
414 typedef bool const_reference;
415#if __cplusplus > 201703L
416 typedef void pointer;
417#else
418 typedef const bool* pointer;
419#endif
420 typedef _Bit_const_iterator const_iterator;
421
422 _GLIBCXX20_CONSTEXPR
423 _Bit_const_iterator() : _Bit_iterator_base(0, 0) { }
424
425 _GLIBCXX20_CONSTEXPR
426 _Bit_const_iterator(_Bit_type * __x, unsigned int __y)
427 : _Bit_iterator_base(__x, __y) { }
428
429 _GLIBCXX20_CONSTEXPR
430 _Bit_const_iterator(const _Bit_iterator& __x)
431 : _Bit_iterator_base(__x._M_p, __x._M_offset) { }
432
433 _GLIBCXX20_CONSTEXPR
434 _Bit_iterator
435 _M_const_cast() const
436 { return _Bit_iterator(_M_p, _M_offset); }
437
438 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
439 const_reference
440 operator*() const
441 {
442 _M_assume_normalized();
443 return _Bit_reference(_M_p, 1UL << _M_offset);
444 }
445
446 _GLIBCXX20_CONSTEXPR
447 const_iterator&
448 operator++()
449 {
450 _M_bump_up();
451 return *this;
452 }
453
454 _GLIBCXX20_CONSTEXPR
455 const_iterator
456 operator++(int)
457 {
458 const_iterator __tmp = *this;
459 _M_bump_up();
460 return __tmp;
461 }
462
463 _GLIBCXX20_CONSTEXPR
464 const_iterator&
465 operator--()
466 {
467 _M_bump_down();
468 return *this;
469 }
470
471 _GLIBCXX20_CONSTEXPR
472 const_iterator
473 operator--(int)
474 {
475 const_iterator __tmp = *this;
476 _M_bump_down();
477 return __tmp;
478 }
479
480 _GLIBCXX20_CONSTEXPR
481 const_iterator&
482 operator+=(difference_type __i)
483 {
484 _M_incr(__i);
485 return *this;
486 }
487
488 _GLIBCXX20_CONSTEXPR
489 const_iterator&
490 operator-=(difference_type __i)
491 {
492 *this += -__i;
493 return *this;
494 }
495
496 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
497 const_reference
498 operator[](difference_type __i) const
499 { return *(*this + __i); }
500
501 _GLIBCXX_NODISCARD
502 friend _GLIBCXX20_CONSTEXPR const_iterator
503 operator+(const const_iterator& __x, difference_type __n)
504 {
505 const_iterator __tmp = __x;
506 __tmp += __n;
507 return __tmp;
508 }
509
510 _GLIBCXX_NODISCARD
511 friend _GLIBCXX20_CONSTEXPR const_iterator
512 operator-(const const_iterator& __x, difference_type __n)
513 {
514 const_iterator __tmp = __x;
515 __tmp -= __n;
516 return __tmp;
517 }
518
519 _GLIBCXX_NODISCARD
520 friend _GLIBCXX20_CONSTEXPR const_iterator
521 operator+(difference_type __n, const const_iterator& __x)
522 { return __x + __n; }
523 };
524
525 template<typename _Alloc>
526 struct _Bvector_base
527 {
528 typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
529 rebind<_Bit_type>::other _Bit_alloc_type;
530 typedef typename __gnu_cxx::__alloc_traits<_Bit_alloc_type>
531 _Bit_alloc_traits;
532 typedef typename _Bit_alloc_traits::pointer _Bit_pointer;
533
534 struct _Bvector_impl_data
535 {
536#if !_GLIBCXX_INLINE_VERSION
537 _Bit_iterator _M_start;
538#else
539 // We don't need the offset field for the start, it's always zero.
540 struct {
541 _Bit_type* _M_p;
542 // Allow assignment from iterators (assume offset is zero):
543 _GLIBCXX20_CONSTEXPR
544 void operator=(_Bit_iterator __it) { _M_p = __it._M_p; }
545 } _M_start;
546#endif
547 _Bit_iterator _M_finish;
548 _Bit_pointer _M_end_of_storage;
549
550 _GLIBCXX20_CONSTEXPR
551 _Bvector_impl_data() _GLIBCXX_NOEXCEPT
552 : _M_start(), _M_finish(), _M_end_of_storage()
553 { }
554
555#if __cplusplus >= 201103L
556 _Bvector_impl_data(const _Bvector_impl_data&) = default;
557
558 _Bvector_impl_data&
559 operator=(const _Bvector_impl_data&) = default;
560
561 _GLIBCXX20_CONSTEXPR
562 _Bvector_impl_data(_Bvector_impl_data&& __x) noexcept
563 : _Bvector_impl_data(__x)
564 { __x._M_reset(); }
565
566 _GLIBCXX20_CONSTEXPR
567 void
568 _M_move_data(_Bvector_impl_data&& __x) noexcept
569 {
570 *this = __x;
571 __x._M_reset();
572 }
573#endif
574
575 _GLIBCXX20_CONSTEXPR
576 void
577 _M_reset() _GLIBCXX_NOEXCEPT
578 { *this = _Bvector_impl_data(); }
579
580 _GLIBCXX20_CONSTEXPR
581 void
582 _M_swap_data(_Bvector_impl_data& __x) _GLIBCXX_NOEXCEPT
583 {
584 // Do not use std::swap(_M_start, __x._M_start), etc as it loses
585 // information used by TBAA.
586 std::swap(*this, __x);
587 }
588 };
589
590 struct _Bvector_impl
591 : public _Bit_alloc_type, public _Bvector_impl_data
592 {
593 _GLIBCXX20_CONSTEXPR
594 _Bvector_impl() _GLIBCXX_NOEXCEPT_IF(
595 is_nothrow_default_constructible<_Bit_alloc_type>::value)
596#if __cpp_concepts
597 requires is_default_constructible_v<_Bit_alloc_type>
598#endif
599 : _Bit_alloc_type()
600 { }
601
602 _GLIBCXX20_CONSTEXPR
603 _Bvector_impl(const _Bit_alloc_type& __a) _GLIBCXX_NOEXCEPT
604 : _Bit_alloc_type(__a)
605 { }
606
607#if __cplusplus >= 201103L
608 // Not defaulted, to enforce noexcept(true) even when
609 // !is_nothrow_move_constructible<_Bit_alloc_type>.
610 _GLIBCXX20_CONSTEXPR
611 _Bvector_impl(_Bvector_impl&& __x) noexcept
612 : _Bit_alloc_type(std::move(__x)), _Bvector_impl_data(std::move(__x))
613 { }
614
615 _GLIBCXX20_CONSTEXPR
616 _Bvector_impl(_Bit_alloc_type&& __a, _Bvector_impl&& __x) noexcept
617 : _Bit_alloc_type(std::move(__a)), _Bvector_impl_data(std::move(__x))
618 { }
619#endif
620
621 _GLIBCXX20_CONSTEXPR
622 _Bit_type*
623 _M_end_addr() const _GLIBCXX_NOEXCEPT
624 {
625 if (this->_M_end_of_storage)
626 return std::__addressof(this->_M_end_of_storage[-1]) + 1;
627 return 0;
628 }
629 };
630
631 public:
632 typedef _Alloc allocator_type;
633
634 _GLIBCXX20_CONSTEXPR
635 _Bit_alloc_type&
636 _M_get_Bit_allocator() _GLIBCXX_NOEXCEPT
637 { return this->_M_impl; }
638
639 _GLIBCXX20_CONSTEXPR
640 const _Bit_alloc_type&
641 _M_get_Bit_allocator() const _GLIBCXX_NOEXCEPT
642 { return this->_M_impl; }
643
644 _GLIBCXX20_CONSTEXPR
645 allocator_type
646 get_allocator() const _GLIBCXX_NOEXCEPT
647 { return allocator_type(_M_get_Bit_allocator()); }
648
649#if __cplusplus >= 201103L
650 _Bvector_base() = default;
651#else
652 _Bvector_base() { }
653#endif
654
655 _GLIBCXX20_CONSTEXPR
656 _Bvector_base(const allocator_type& __a)
657 : _M_impl(__a) { }
658
659#if __cplusplus >= 201103L
660 _Bvector_base(_Bvector_base&&) = default;
661
662 _GLIBCXX20_CONSTEXPR
663 _Bvector_base(_Bvector_base&& __x, const allocator_type& __a) noexcept
664 : _M_impl(_Bit_alloc_type(__a), std::move(__x._M_impl))
665 { }
666#endif
667
668 _GLIBCXX20_CONSTEXPR
669 ~_Bvector_base()
670 { this->_M_deallocate(); }
671
672 protected:
673 _Bvector_impl _M_impl;
674
675 _GLIBCXX20_CONSTEXPR
676 _Bit_pointer
677 _M_allocate(size_t __n)
678 {
679 _Bit_pointer __p = _Bit_alloc_traits::allocate(_M_impl, _S_nword(__n));
680#if __cpp_lib_is_constant_evaluated && __cpp_constexpr_dynamic_alloc
681 if (std::is_constant_evaluated())
682 {
683 __n = _S_nword(__n);
684 for (size_t __i = 0; __i < __n; ++__i)
685 std::construct_at(std::to_address(__p) + __i);
686 }
687#endif
688 return __p;
689 }
690
691 _GLIBCXX20_CONSTEXPR
692 void
693 _M_deallocate()
694 {
695 if (_M_impl._M_start._M_p)
696 {
697 const size_t __n = _M_impl._M_end_addr() - _M_impl._M_start._M_p;
698 _Bit_alloc_traits::deallocate(_M_impl,
699 _M_impl._M_end_of_storage - __n,
700 __n);
701 _M_impl._M_reset();
702 }
703 }
704
705#if __cplusplus >= 201103L
706 _GLIBCXX20_CONSTEXPR
707 void
708 _M_move_data(_Bvector_base&& __x) noexcept
709 { _M_impl._M_move_data(std::move(__x._M_impl)); }
710#endif
711
712 _GLIBCXX_CONSTEXPR
713 static size_t
714 _S_nword(size_t __n)
715 { return (__n + int(_S_word_bit) - 1) / int(_S_word_bit); }
716 };
717
718 /**
719 * @brief A specialization of vector for booleans which offers fixed time
720 * access to individual elements in any order.
721 *
722 * @ingroup sequences
723 * @headerfile vector
724 * @since C++98
725 *
726 * @tparam _Alloc Allocator type.
727 *
728 * Note that vector<bool> does not actually meet the requirements for being
729 * a container. This is because the reference and pointer types are not
730 * really references and pointers to bool. See DR96 for details. @see
731 * vector for function documentation.
732 *
733 * In some terminology a %vector can be described as a dynamic
734 * C-style array, it offers fast and efficient access to individual
735 * elements in any order and saves the user from worrying about
736 * memory and size allocation. Subscripting ( @c [] ) access is
737 * also provided as with C-style arrays.
738 */
739 template<typename _Alloc>
740 class vector<bool, _Alloc> : protected _Bvector_base<_Alloc>
741 {
742 typedef _Bvector_base<_Alloc> _Base;
743 typedef typename _Base::_Bit_pointer _Bit_pointer;
744 typedef typename _Base::_Bit_alloc_traits _Bit_alloc_traits;
745
746#if __cplusplus >= 201103L
747 friend struct std::hash<vector>;
748#endif
749
750 public:
751 typedef bool value_type;
752 typedef size_t size_type;
753 typedef ptrdiff_t difference_type;
754 typedef _Bit_reference reference;
755 typedef bool const_reference;
756 typedef _Bit_reference* pointer;
757 typedef const bool* const_pointer;
758 typedef _Bit_iterator iterator;
759 typedef _Bit_const_iterator const_iterator;
760 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
761 typedef std::reverse_iterator<iterator> reverse_iterator;
762 typedef _Alloc allocator_type;
763
764 _GLIBCXX20_CONSTEXPR
765 allocator_type
766 get_allocator() const
767 { return _Base::get_allocator(); }
768
769 protected:
770 using _Base::_M_allocate;
771 using _Base::_M_deallocate;
772 using _Base::_S_nword;
773 using _Base::_M_get_Bit_allocator;
774
775 public:
776#if __cplusplus >= 201103L
777 vector() = default;
778#else
779 vector() { }
780#endif
781
782 _GLIBCXX20_CONSTEXPR
783 explicit
784 vector(const allocator_type& __a)
785 : _Base(__a) { }
786
787#if __cplusplus >= 201103L
788 _GLIBCXX20_CONSTEXPR
789 explicit
790 vector(size_type __n, const allocator_type& __a = allocator_type())
791 : vector(__n, false, __a)
792 { }
793
794 _GLIBCXX20_CONSTEXPR
795 vector(size_type __n, const bool& __value,
796 const allocator_type& __a = allocator_type())
797#else
798 explicit
799 vector(size_type __n, const bool& __value = bool(),
800 const allocator_type& __a = allocator_type())
801#endif
802 : _Base(__a)
803 {
804 _M_initialize(__n);
805 _M_initialize_value(x: __value);
806 }
807
808 _GLIBCXX20_CONSTEXPR
809 vector(const vector& __x)
810 : _Base(_Bit_alloc_traits::_S_select_on_copy(__x._M_get_Bit_allocator()))
811 {
812 const_iterator __xbegin = __x.begin(), __xend = __x.end();
813 _M_initialize(n: __x.size());
814 _M_copy_aligned(first: __xbegin, last: __xend, result: begin());
815 }
816
817#if __cplusplus >= 201103L
818 vector(vector&&) = default;
819
820 private:
821 _GLIBCXX20_CONSTEXPR
822 vector(vector&& __x, const allocator_type& __a, true_type) noexcept
823 : _Base(std::move(__x), __a)
824 { }
825
826 _GLIBCXX20_CONSTEXPR
827 vector(vector&& __x, const allocator_type& __a, false_type)
828 : _Base(__a)
829 {
830 if (__x.get_allocator() == __a)
831 this->_M_move_data(std::move(__x));
832 else
833 {
834 _M_initialize(n: __x.size());
835 _M_copy_aligned(first: __x.begin(), last: __x.end(), result: begin());
836 __x.clear();
837 }
838 }
839
840 public:
841 _GLIBCXX20_CONSTEXPR
842 vector(vector&& __x, const __type_identity_t<allocator_type>& __a)
843 noexcept(_Bit_alloc_traits::_S_always_equal())
844 : vector(std::move(__x), __a,
845 typename _Bit_alloc_traits::is_always_equal{})
846 { }
847
848 _GLIBCXX20_CONSTEXPR
849 vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
850 : _Base(__a)
851 {
852 _M_initialize(n: __x.size());
853 _M_copy_aligned(first: __x.begin(), last: __x.end(), result: begin());
854 }
855
856 _GLIBCXX20_CONSTEXPR
857 vector(initializer_list<bool> __l,
858 const allocator_type& __a = allocator_type())
859 : _Base(__a)
860 {
861 _M_initialize_range(__l.begin(), __l.end(),
862 random_access_iterator_tag());
863 }
864#endif
865
866#if __cplusplus >= 201103L
867 template<typename _InputIterator,
868 typename = std::_RequireInputIter<_InputIterator>>
869 _GLIBCXX20_CONSTEXPR
870 vector(_InputIterator __first, _InputIterator __last,
871 const allocator_type& __a = allocator_type())
872 : _Base(__a)
873 {
874 _M_initialize_range(__first, __last,
875 std::__iterator_category(__first));
876 }
877#else
878 template<typename _InputIterator>
879 vector(_InputIterator __first, _InputIterator __last,
880 const allocator_type& __a = allocator_type())
881 : _Base(__a)
882 {
883 // Check whether it's an integral type. If so, it's not an iterator.
884 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
885 _M_initialize_dispatch(__first, __last, _Integral());
886 }
887#endif
888
889 _GLIBCXX20_CONSTEXPR
890 ~vector() _GLIBCXX_NOEXCEPT { }
891
892 _GLIBCXX20_CONSTEXPR
893 vector&
894 operator=(const vector& __x)
895 {
896 if (&__x == this)
897 return *this;
898#if __cplusplus >= 201103L
899 if (_Bit_alloc_traits::_S_propagate_on_copy_assign())
900 {
901 if (this->_M_get_Bit_allocator() != __x._M_get_Bit_allocator())
902 {
903 this->_M_deallocate();
904 std::__alloc_on_copy(_M_get_Bit_allocator(),
905 __x._M_get_Bit_allocator());
906 _M_initialize(n: __x.size());
907 }
908 else
909 std::__alloc_on_copy(_M_get_Bit_allocator(),
910 __x._M_get_Bit_allocator());
911 }
912#endif
913 if (__x.size() > capacity())
914 {
915 this->_M_deallocate();
916 _M_initialize(n: __x.size());
917 }
918 this->_M_impl._M_finish = _M_copy_aligned(first: __x.begin(), last: __x.end(),
919 result: begin());
920 return *this;
921 }
922
923#if __cplusplus >= 201103L
924 _GLIBCXX20_CONSTEXPR
925 vector&
926 operator=(vector&& __x) noexcept(_Bit_alloc_traits::_S_nothrow_move())
927 {
928 if (_Bit_alloc_traits::_S_propagate_on_move_assign()
929 || this->_M_get_Bit_allocator() == __x._M_get_Bit_allocator())
930 {
931 this->_M_deallocate();
932 this->_M_move_data(std::move(__x));
933 std::__alloc_on_move(_M_get_Bit_allocator(),
934 __x._M_get_Bit_allocator());
935 }
936 else
937 {
938 if (__x.size() > capacity())
939 {
940 this->_M_deallocate();
941 _M_initialize(n: __x.size());
942 }
943 this->_M_impl._M_finish = _M_copy_aligned(first: __x.begin(), last: __x.end(),
944 result: begin());
945 __x.clear();
946 }
947 return *this;
948 }
949
950 _GLIBCXX20_CONSTEXPR
951 vector&
952 operator=(initializer_list<bool> __l)
953 {
954 this->assign(__l.begin(), __l.end());
955 return *this;
956 }
957#endif
958
959 // assign(), a generalized assignment member function. Two
960 // versions: one that takes a count, and one that takes a range.
961 // The range version is a member template, so we dispatch on whether
962 // or not the type is an integer.
963 _GLIBCXX20_CONSTEXPR
964 void
965 assign(size_type __n, const bool& __x)
966 { _M_fill_assign(__n, __x); }
967
968#if __cplusplus >= 201103L
969 template<typename _InputIterator,
970 typename = std::_RequireInputIter<_InputIterator>>
971 _GLIBCXX20_CONSTEXPR
972 void
973 assign(_InputIterator __first, _InputIterator __last)
974 { _M_assign_aux(__first, __last, std::__iterator_category(__first)); }
975#else
976 template<typename _InputIterator>
977 void
978 assign(_InputIterator __first, _InputIterator __last)
979 {
980 // Check whether it's an integral type. If so, it's not an iterator.
981 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
982 _M_assign_dispatch(__first, __last, _Integral());
983 }
984#endif
985
986#if __cplusplus >= 201103L
987 _GLIBCXX20_CONSTEXPR
988 void
989 assign(initializer_list<bool> __l)
990 { _M_assign_aux(__l.begin(), __l.end(), random_access_iterator_tag()); }
991#endif
992
993 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
994 iterator
995 begin() _GLIBCXX_NOEXCEPT
996 { return iterator(this->_M_impl._M_start._M_p, 0); }
997
998 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
999 const_iterator
1000 begin() const _GLIBCXX_NOEXCEPT
1001 { return const_iterator(this->_M_impl._M_start._M_p, 0); }
1002
1003 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1004 iterator
1005 end() _GLIBCXX_NOEXCEPT
1006 { return this->_M_impl._M_finish; }
1007
1008 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1009 const_iterator
1010 end() const _GLIBCXX_NOEXCEPT
1011 { return this->_M_impl._M_finish; }
1012
1013 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1014 reverse_iterator
1015 rbegin() _GLIBCXX_NOEXCEPT
1016 { return reverse_iterator(end()); }
1017
1018 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1019 const_reverse_iterator
1020 rbegin() const _GLIBCXX_NOEXCEPT
1021 { return const_reverse_iterator(end()); }
1022
1023 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1024 reverse_iterator
1025 rend() _GLIBCXX_NOEXCEPT
1026 { return reverse_iterator(begin()); }
1027
1028 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1029 const_reverse_iterator
1030 rend() const _GLIBCXX_NOEXCEPT
1031 { return const_reverse_iterator(begin()); }
1032
1033#if __cplusplus >= 201103L
1034 [[__nodiscard__]] _GLIBCXX20_CONSTEXPR
1035 const_iterator
1036 cbegin() const noexcept
1037 { return const_iterator(this->_M_impl._M_start._M_p, 0); }
1038
1039 [[__nodiscard__]] _GLIBCXX20_CONSTEXPR
1040 const_iterator
1041 cend() const noexcept
1042 { return this->_M_impl._M_finish; }
1043
1044 [[__nodiscard__]] _GLIBCXX20_CONSTEXPR
1045 const_reverse_iterator
1046 crbegin() const noexcept
1047 { return const_reverse_iterator(end()); }
1048
1049 [[__nodiscard__]] _GLIBCXX20_CONSTEXPR
1050 const_reverse_iterator
1051 crend() const noexcept
1052 { return const_reverse_iterator(begin()); }
1053#endif
1054
1055 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1056 size_type
1057 size() const _GLIBCXX_NOEXCEPT
1058 { return size_type(end() - begin()); }
1059
1060 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1061 size_type
1062 max_size() const _GLIBCXX_NOEXCEPT
1063 {
1064 const size_type __isize =
1065 __gnu_cxx::__numeric_traits<difference_type>::__max
1066 - int(_S_word_bit) + 1;
1067 const size_type __asize
1068 = _Bit_alloc_traits::max_size(_M_get_Bit_allocator());
1069 return (__asize <= __isize / int(_S_word_bit)
1070 ? __asize * int(_S_word_bit) : __isize);
1071 }
1072
1073 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1074 size_type
1075 capacity() const _GLIBCXX_NOEXCEPT
1076 { return size_type(const_iterator(this->_M_impl._M_end_addr(), 0)
1077 - begin()); }
1078
1079 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1080 bool
1081 empty() const _GLIBCXX_NOEXCEPT
1082 { return begin() == end(); }
1083
1084 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1085 reference
1086 operator[](size_type __n)
1087 { return begin()[__n]; }
1088
1089 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1090 const_reference
1091 operator[](size_type __n) const
1092 { return begin()[__n]; }
1093
1094 protected:
1095 _GLIBCXX20_CONSTEXPR
1096 void
1097 _M_range_check(size_type __n) const
1098 {
1099 if (__n >= this->size())
1100 __throw_out_of_range_fmt(__N("vector<bool>::_M_range_check: __n "
1101 "(which is %zu) >= this->size() "
1102 "(which is %zu)"),
1103 __n, this->size());
1104 }
1105
1106 public:
1107 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1108 reference
1109 at(size_type __n)
1110 {
1111 _M_range_check(__n);
1112 return (*this)[__n];
1113 }
1114
1115 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1116 const_reference
1117 at(size_type __n) const
1118 {
1119 _M_range_check(__n);
1120 return (*this)[__n];
1121 }
1122
1123 _GLIBCXX20_CONSTEXPR
1124 void
1125 reserve(size_type __n)
1126 {
1127 if (__n > max_size())
1128 __throw_length_error(__N("vector::reserve"));
1129 if (capacity() < __n)
1130 _M_reallocate(__n);
1131 }
1132
1133 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1134 reference
1135 front()
1136 { return *begin(); }
1137
1138 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1139 const_reference
1140 front() const
1141 { return *begin(); }
1142
1143 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1144 reference
1145 back()
1146 { return *(end() - 1); }
1147
1148 _GLIBCXX_NODISCARD _GLIBCXX20_CONSTEXPR
1149 const_reference
1150 back() const
1151 { return *(end() - 1); }
1152
1153 _GLIBCXX20_CONSTEXPR
1154 void
1155 push_back(bool __x)
1156 {
1157 if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_addr())
1158 *this->_M_impl._M_finish++ = __x;
1159 else
1160 _M_insert_aux(position: end(), __x);
1161 }
1162
1163 _GLIBCXX20_CONSTEXPR
1164 void
1165 swap(vector& __x) _GLIBCXX_NOEXCEPT
1166 {
1167#if __cplusplus >= 201103L
1168 __glibcxx_assert(_Bit_alloc_traits::propagate_on_container_swap::value
1169 || _M_get_Bit_allocator() == __x._M_get_Bit_allocator());
1170#endif
1171 this->_M_impl._M_swap_data(__x._M_impl);
1172 _Bit_alloc_traits::_S_on_swap(_M_get_Bit_allocator(),
1173 __x._M_get_Bit_allocator());
1174 }
1175
1176 // [23.2.5]/1, third-to-last entry in synopsis listing
1177 _GLIBCXX20_CONSTEXPR
1178 static void
1179 swap(reference __x, reference __y) _GLIBCXX_NOEXCEPT
1180 {
1181 bool __tmp = __x;
1182 __x = __y;
1183 __y = __tmp;
1184 }
1185
1186 _GLIBCXX20_CONSTEXPR
1187 iterator
1188#if __cplusplus >= 201103L
1189 insert(const_iterator __position, const bool& __x)
1190#else
1191 insert(iterator __position, const bool& __x)
1192#endif
1193 {
1194 const difference_type __n = __position - begin();
1195 if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_addr()
1196 && __position == end())
1197 *this->_M_impl._M_finish++ = __x;
1198 else
1199 _M_insert_aux(position: __position._M_const_cast(), __x);
1200 return begin() + __n;
1201 }
1202
1203#if _GLIBCXX_USE_DEPRECATED
1204 _GLIBCXX_DEPRECATED_SUGGEST("insert(position, false)")
1205 iterator
1206 insert(const_iterator __position)
1207 { return this->insert(__position._M_const_cast(), false); }
1208#endif
1209
1210#if __cplusplus >= 201103L
1211 template<typename _InputIterator,
1212 typename = std::_RequireInputIter<_InputIterator>>
1213 _GLIBCXX20_CONSTEXPR
1214 iterator
1215 insert(const_iterator __position,
1216 _InputIterator __first, _InputIterator __last)
1217 {
1218 difference_type __offset = __position - cbegin();
1219 _M_insert_range(__position._M_const_cast(),
1220 __first, __last,
1221 std::__iterator_category(__first));
1222 return begin() + __offset;
1223 }
1224#else
1225 template<typename _InputIterator>
1226 void
1227 insert(iterator __position,
1228 _InputIterator __first, _InputIterator __last)
1229 {
1230 // Check whether it's an integral type. If so, it's not an iterator.
1231 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
1232 _M_insert_dispatch(__position, __first, __last, _Integral());
1233 }
1234#endif
1235
1236#if __cplusplus >= 201103L
1237 _GLIBCXX20_CONSTEXPR
1238 iterator
1239 insert(const_iterator __position, size_type __n, const bool& __x)
1240 {
1241 difference_type __offset = __position - cbegin();
1242 _M_fill_insert(position: __position._M_const_cast(), __n, __x);
1243 return begin() + __offset;
1244 }
1245#else
1246 void
1247 insert(iterator __position, size_type __n, const bool& __x)
1248 { _M_fill_insert(__position, __n, __x); }
1249#endif
1250
1251#if __cplusplus >= 201103L
1252 _GLIBCXX20_CONSTEXPR
1253 iterator
1254 insert(const_iterator __p, initializer_list<bool> __l)
1255 { return this->insert(__p, __l.begin(), __l.end()); }
1256#endif
1257
1258 _GLIBCXX20_CONSTEXPR
1259 void
1260 pop_back()
1261 { --this->_M_impl._M_finish; }
1262
1263 _GLIBCXX20_CONSTEXPR
1264 iterator
1265#if __cplusplus >= 201103L
1266 erase(const_iterator __position)
1267#else
1268 erase(iterator __position)
1269#endif
1270 { return _M_erase(__position._M_const_cast()); }
1271
1272 _GLIBCXX20_CONSTEXPR
1273 iterator
1274#if __cplusplus >= 201103L
1275 erase(const_iterator __first, const_iterator __last)
1276#else
1277 erase(iterator __first, iterator __last)
1278#endif
1279 { return _M_erase(__first._M_const_cast(), __last._M_const_cast()); }
1280
1281 _GLIBCXX20_CONSTEXPR
1282 void
1283 resize(size_type __new_size, bool __x = bool())
1284 {
1285 if (__new_size < size())
1286 _M_erase_at_end(pos: begin() + difference_type(__new_size));
1287 else
1288 insert(end(), __new_size - size(), __x);
1289 }
1290
1291#if __cplusplus >= 201103L
1292 _GLIBCXX20_CONSTEXPR
1293 void
1294 shrink_to_fit()
1295 { _M_shrink_to_fit(); }
1296#endif
1297
1298 _GLIBCXX20_CONSTEXPR
1299 void
1300 flip() _GLIBCXX_NOEXCEPT
1301 {
1302 _Bit_type * const __end = this->_M_impl._M_end_addr();
1303 for (_Bit_type * __p = this->_M_impl._M_start._M_p; __p != __end; ++__p)
1304 *__p = ~*__p;
1305 }
1306
1307 _GLIBCXX20_CONSTEXPR
1308 void
1309 clear() _GLIBCXX_NOEXCEPT
1310 { _M_erase_at_end(pos: begin()); }
1311
1312#if __cplusplus >= 201103L
1313 template<typename... _Args>
1314#if __cplusplus > 201402L
1315 _GLIBCXX20_CONSTEXPR
1316 reference
1317#else
1318 void
1319#endif
1320 emplace_back(_Args&&... __args)
1321 {
1322 push_back(x: bool(__args...));
1323#if __cplusplus > 201402L
1324 return back();
1325#endif
1326 }
1327
1328 template<typename... _Args>
1329 _GLIBCXX20_CONSTEXPR
1330 iterator
1331 emplace(const_iterator __pos, _Args&&... __args)
1332 { return insert(__pos, bool(__args...)); }
1333#endif
1334
1335 protected:
1336 // Precondition: __first._M_offset == 0 && __result._M_offset == 0.
1337 _GLIBCXX20_CONSTEXPR
1338 iterator
1339 _M_copy_aligned(const_iterator __first, const_iterator __last,
1340 iterator __result)
1341 {
1342 _Bit_type* __q = std::copy(__first._M_p, __last._M_p, __result._M_p);
1343 return std::copy(const_iterator(__last._M_p, 0), __last,
1344 iterator(__q, 0));
1345 }
1346
1347 _GLIBCXX20_CONSTEXPR
1348 void
1349 _M_initialize(size_type __n)
1350 {
1351 if (__n)
1352 {
1353 _Bit_pointer __q = this->_M_allocate(__n);
1354 this->_M_impl._M_end_of_storage = __q + _S_nword(__n);
1355 iterator __start = iterator(std::__addressof(*__q), 0);
1356 this->_M_impl._M_start = __start;
1357 this->_M_impl._M_finish = __start + difference_type(__n);
1358 }
1359 }
1360
1361 _GLIBCXX20_CONSTEXPR
1362 void
1363 _M_initialize_value(bool __x) _GLIBCXX_NOEXCEPT
1364 {
1365 if (_Bit_type* __p = this->_M_impl._M_start._M_p)
1366 __fill_bvector_n(__p, this->_M_impl._M_end_addr() - __p, __x);
1367 }
1368
1369 _GLIBCXX20_CONSTEXPR
1370 void
1371 _M_reallocate(size_type __n);
1372
1373#if __cplusplus >= 201103L
1374 _GLIBCXX20_CONSTEXPR
1375 bool
1376 _M_shrink_to_fit();
1377#endif
1378
1379#if __cplusplus < 201103L
1380 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1381 // 438. Ambiguity in the "do the right thing" clause
1382 template<typename _Integer>
1383 void
1384 _M_initialize_dispatch(_Integer __n, _Integer __x, __true_type)
1385 {
1386 _M_initialize(static_cast<size_type>(__n));
1387 _M_initialize_value(__x);
1388 }
1389
1390 template<typename _InputIterator>
1391 void
1392 _M_initialize_dispatch(_InputIterator __first, _InputIterator __last,
1393 __false_type)
1394 { _M_initialize_range(__first, __last,
1395 std::__iterator_category(__first)); }
1396#endif
1397
1398 template<typename _InputIterator>
1399 _GLIBCXX20_CONSTEXPR
1400 void
1401 _M_initialize_range(_InputIterator __first, _InputIterator __last,
1402 std::input_iterator_tag)
1403 {
1404 for (; __first != __last; ++__first)
1405 push_back(x: *__first);
1406 }
1407
1408 template<typename _ForwardIterator>
1409 _GLIBCXX20_CONSTEXPR
1410 void
1411 _M_initialize_range(_ForwardIterator __first, _ForwardIterator __last,
1412 std::forward_iterator_tag)
1413 {
1414 const size_type __n = std::distance(__first, __last);
1415 _M_initialize(__n);
1416 std::copy(__first, __last, begin());
1417 }
1418
1419#if __cplusplus < 201103L
1420 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1421 // 438. Ambiguity in the "do the right thing" clause
1422 template<typename _Integer>
1423 void
1424 _M_assign_dispatch(_Integer __n, _Integer __val, __true_type)
1425 { _M_fill_assign(__n, __val); }
1426
1427 template<class _InputIterator>
1428 void
1429 _M_assign_dispatch(_InputIterator __first, _InputIterator __last,
1430 __false_type)
1431 { _M_assign_aux(__first, __last, std::__iterator_category(__first)); }
1432#endif
1433
1434 _GLIBCXX20_CONSTEXPR
1435 void
1436 _M_fill_assign(size_t __n, bool __x)
1437 {
1438 if (__n > size())
1439 {
1440 _M_initialize_value(__x);
1441 insert(end(), __n - size(), __x);
1442 }
1443 else
1444 {
1445 _M_erase_at_end(pos: begin() + __n);
1446 _M_initialize_value(__x);
1447 }
1448 }
1449
1450 template<typename _InputIterator>
1451 _GLIBCXX20_CONSTEXPR
1452 void
1453 _M_assign_aux(_InputIterator __first, _InputIterator __last,
1454 std::input_iterator_tag)
1455 {
1456 iterator __cur = begin();
1457 for (; __first != __last && __cur != end(); ++__cur, (void)++__first)
1458 *__cur = *__first;
1459 if (__first == __last)
1460 _M_erase_at_end(pos: __cur);
1461 else
1462 insert(end(), __first, __last);
1463 }
1464
1465 template<typename _ForwardIterator>
1466 _GLIBCXX20_CONSTEXPR
1467 void
1468 _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
1469 std::forward_iterator_tag)
1470 {
1471 const size_type __len = std::distance(__first, __last);
1472 if (__len < size())
1473 _M_erase_at_end(pos: std::copy(__first, __last, begin()));
1474 else
1475 {
1476 _ForwardIterator __mid = __first;
1477 std::advance(__mid, size());
1478 std::copy(__first, __mid, begin());
1479 insert(end(), __mid, __last);
1480 }
1481 }
1482
1483#if __cplusplus < 201103L
1484 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1485 // 438. Ambiguity in the "do the right thing" clause
1486 template<typename _Integer>
1487 void
1488 _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __x,
1489 __true_type)
1490 { _M_fill_insert(__pos, __n, __x); }
1491
1492 template<typename _InputIterator>
1493 void
1494 _M_insert_dispatch(iterator __pos,
1495 _InputIterator __first, _InputIterator __last,
1496 __false_type)
1497 { _M_insert_range(__pos, __first, __last,
1498 std::__iterator_category(__first)); }
1499#endif
1500
1501 _GLIBCXX20_CONSTEXPR
1502 void
1503 _M_fill_insert(iterator __position, size_type __n, bool __x);
1504
1505 template<typename _InputIterator>
1506 _GLIBCXX20_CONSTEXPR
1507 void
1508 _M_insert_range(iterator __pos, _InputIterator __first,
1509 _InputIterator __last, std::input_iterator_tag)
1510 {
1511 for (; __first != __last; ++__first)
1512 {
1513 __pos = insert(__pos, *__first);
1514 ++__pos;
1515 }
1516 }
1517
1518 template<typename _ForwardIterator>
1519 _GLIBCXX20_CONSTEXPR
1520 void
1521 _M_insert_range(iterator __position, _ForwardIterator __first,
1522 _ForwardIterator __last, std::forward_iterator_tag);
1523
1524 _GLIBCXX20_CONSTEXPR
1525 void
1526 _M_insert_aux(iterator __position, bool __x);
1527
1528 _GLIBCXX20_CONSTEXPR
1529 size_type
1530 _M_check_len(size_type __n, const char* __s) const
1531 {
1532 if (max_size() - size() < __n)
1533 __throw_length_error(__N(__s));
1534
1535 const size_type __len = size() + std::max(size(), __n);
1536 return (__len < size() || __len > max_size()) ? max_size() : __len;
1537 }
1538
1539 _GLIBCXX20_CONSTEXPR
1540 void
1541 _M_erase_at_end(iterator __pos)
1542 { this->_M_impl._M_finish = __pos; }
1543
1544 _GLIBCXX20_CONSTEXPR
1545 iterator
1546 _M_erase(iterator __pos);
1547
1548 _GLIBCXX20_CONSTEXPR
1549 iterator
1550 _M_erase(iterator __first, iterator __last);
1551
1552 protected:
1553 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1554 // DR 464. Suggestion for new member functions in standard containers.
1555 // N.B. DR 464 says nothing about vector<bool> but we need something
1556 // here due to the using-declaration in __gnu_debug::vector.
1557 // vector class.
1558#if __cplusplus >= 201103L
1559 void data() = delete;
1560#else
1561 void data() { }
1562#endif
1563 };
1564
1565_GLIBCXX_END_NAMESPACE_CONTAINER
1566
1567 // Fill a partial word.
1568 _GLIBCXX20_CONSTEXPR
1569 inline void
1570 __fill_bvector(_Bit_type* __v, unsigned int __first, unsigned int __last,
1571 bool __x) _GLIBCXX_NOEXCEPT
1572 {
1573 const _Bit_type __fmask = ~0ul << __first;
1574 const _Bit_type __lmask = ~0ul >> (_S_word_bit - __last);
1575 const _Bit_type __mask = __fmask & __lmask;
1576
1577 if (__x)
1578 *__v |= __mask;
1579 else
1580 *__v &= ~__mask;
1581 }
1582
1583 // Fill N full words, as if using memset, but usable in constant expressions.
1584 __attribute__((__nonnull__))
1585 _GLIBCXX20_CONSTEXPR
1586 inline void
1587 __fill_bvector_n(_Bit_type* __p, size_t __n, bool __x) _GLIBCXX_NOEXCEPT
1588 {
1589#if __cpp_lib_is_constant_evaluated
1590 if (std::is_constant_evaluated())
1591 {
1592 for (size_t __i = 0; __i < __n; ++__i)
1593 __p[__i] = __x ? ~0ul : 0ul;
1594 return;
1595 }
1596#endif
1597 __builtin_memset(__p, __x ? ~0 : 0, __n * sizeof(_Bit_type));
1598 }
1599
1600
1601 _GLIBCXX20_CONSTEXPR
1602 inline void
1603 __fill_a1(_GLIBCXX_STD_C::_Bit_iterator __first,
1604 _GLIBCXX_STD_C::_Bit_iterator __last, const bool& __x)
1605 {
1606 if (__first._M_p != __last._M_p)
1607 {
1608 _Bit_type* __first_p = __first._M_p;
1609 if (__first._M_offset != 0)
1610 __fill_bvector(v: __first_p++, first: __first._M_offset, last: _S_word_bit, __x);
1611
1612 __fill_bvector_n(p: __first_p, n: __last._M_p - __first_p, __x);
1613
1614 if (__last._M_offset != 0)
1615 __fill_bvector(v: __last._M_p, first: 0, last: __last._M_offset, __x);
1616 }
1617 else if (__first._M_offset != __last._M_offset)
1618 __fill_bvector(v: __first._M_p, first: __first._M_offset, last: __last._M_offset, __x);
1619 }
1620
1621#if __cplusplus >= 201103L
1622 // DR 1182.
1623 /// std::hash specialization for vector<bool>.
1624 template<typename _Alloc>
1625 struct hash<_GLIBCXX_STD_C::vector<bool, _Alloc>>
1626 : public __hash_base<size_t, _GLIBCXX_STD_C::vector<bool, _Alloc>>
1627 {
1628 size_t
1629 operator()(const _GLIBCXX_STD_C::vector<bool, _Alloc>&) const noexcept;
1630 };
1631#endif // C++11
1632
1633_GLIBCXX_END_NAMESPACE_VERSION
1634} // namespace std
1635
1636#endif
1637