1// Vector implementation -*- C++ -*-
2
3// Copyright (C) 2001-2018 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/stl_vector.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_VECTOR_H
57#define _STL_VECTOR_H 1
58
59#include <bits/stl_iterator_base_funcs.h>
60#include <bits/functexcept.h>
61#include <bits/concept_check.h>
62#if __cplusplus >= 201103L
63#include <initializer_list>
64#endif
65
66#include <debug/assertions.h>
67
68#if _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR
69extern "C" void
70__sanitizer_annotate_contiguous_container(const void*, const void*,
71 const void*, const void*);
72#endif
73
74namespace std _GLIBCXX_VISIBILITY(default)
75{
76_GLIBCXX_BEGIN_NAMESPACE_VERSION
77_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
78
79 /// See bits/stl_deque.h's _Deque_base for an explanation.
80 template<typename _Tp, typename _Alloc>
81 struct _Vector_base
82 {
83 typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
84 rebind<_Tp>::other _Tp_alloc_type;
85 typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type>::pointer
86 pointer;
87
88 struct _Vector_impl
89 : public _Tp_alloc_type
90 {
91 pointer _M_start;
92 pointer _M_finish;
93 pointer _M_end_of_storage;
94
95 _Vector_impl()
96 : _Tp_alloc_type(), _M_start(), _M_finish(), _M_end_of_storage()
97 { }
98
99 _Vector_impl(_Tp_alloc_type const& __a) _GLIBCXX_NOEXCEPT
100 : _Tp_alloc_type(__a), _M_start(), _M_finish(), _M_end_of_storage()
101 { }
102
103#if __cplusplus >= 201103L
104 _Vector_impl(_Tp_alloc_type&& __a) noexcept
105 : _Tp_alloc_type(std::move(__a)),
106 _M_start(), _M_finish(), _M_end_of_storage()
107 { }
108#endif
109
110 void _M_swap_data(_Vector_impl& __x) _GLIBCXX_NOEXCEPT
111 {
112 std::swap(_M_start, __x._M_start);
113 std::swap(_M_finish, __x._M_finish);
114 std::swap(_M_end_of_storage, __x._M_end_of_storage);
115 }
116
117#if _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR
118 template<typename = _Tp_alloc_type>
119 struct _Asan
120 {
121 typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type>
122 ::size_type size_type;
123
124 static void _S_shrink(_Vector_impl&, size_type) { }
125 static void _S_on_dealloc(_Vector_impl&) { }
126
127 typedef _Vector_impl& _Reinit;
128
129 struct _Grow
130 {
131 _Grow(_Vector_impl&, size_type) { }
132 void _M_grew(size_type) { }
133 };
134 };
135
136 // Enable ASan annotations for memory obtained from std::allocator.
137 template<typename _Up>
138 struct _Asan<allocator<_Up> >
139 {
140 typedef typename __gnu_cxx::__alloc_traits<_Tp_alloc_type>
141 ::size_type size_type;
142
143 // Adjust ASan annotation for [_M_start, _M_end_of_storage) to
144 // mark end of valid region as __curr instead of __prev.
145 static void
146 _S_adjust(_Vector_impl& __impl, pointer __prev, pointer __curr)
147 {
148 __sanitizer_annotate_contiguous_container(__impl._M_start,
149 __impl._M_end_of_storage, __prev, __curr);
150 }
151
152 static void
153 _S_grow(_Vector_impl& __impl, size_type __n)
154 { _S_adjust(__impl, __impl._M_finish, __impl._M_finish + __n); }
155
156 static void
157 _S_shrink(_Vector_impl& __impl, size_type __n)
158 { _S_adjust(__impl, __impl._M_finish + __n, __impl._M_finish); }
159
160 static void
161 _S_on_dealloc(_Vector_impl& __impl)
162 {
163 if (__impl._M_start)
164 _S_adjust(__impl, __impl._M_finish, __impl._M_end_of_storage);
165 }
166
167 // Used on reallocation to tell ASan unused capacity is invalid.
168 struct _Reinit
169 {
170 explicit _Reinit(_Vector_impl& __impl) : _M_impl(__impl)
171 {
172 // Mark unused capacity as valid again before deallocating it.
173 _S_on_dealloc(_M_impl);
174 }
175
176 ~_Reinit()
177 {
178 // Mark unused capacity as invalid after reallocation.
179 if (_M_impl._M_start)
180 _S_adjust(_M_impl, _M_impl._M_end_of_storage,
181 _M_impl._M_finish);
182 }
183
184 _Vector_impl& _M_impl;
185
186#if __cplusplus >= 201103L
187 _Reinit(const _Reinit&) = delete;
188 _Reinit& operator=(const _Reinit&) = delete;
189#endif
190 };
191
192 // Tell ASan when unused capacity is initialized to be valid.
193 struct _Grow
194 {
195 _Grow(_Vector_impl& __impl, size_type __n)
196 : _M_impl(__impl), _M_n(__n)
197 { _S_grow(_M_impl, __n); }
198
199 ~_Grow() { if (_M_n) _S_shrink(_M_impl, _M_n); }
200
201 void _M_grew(size_type __n) { _M_n -= __n; }
202
203#if __cplusplus >= 201103L
204 _Grow(const _Grow&) = delete;
205 _Grow& operator=(const _Grow&) = delete;
206#endif
207 private:
208 _Vector_impl& _M_impl;
209 size_type _M_n;
210 };
211 };
212
213#define _GLIBCXX_ASAN_ANNOTATE_REINIT \
214 typename _Base::_Vector_impl::template _Asan<>::_Reinit const \
215 __attribute__((__unused__)) __reinit_guard(this->_M_impl)
216#define _GLIBCXX_ASAN_ANNOTATE_GROW(n) \
217 typename _Base::_Vector_impl::template _Asan<>::_Grow \
218 __attribute__((__unused__)) __grow_guard(this->_M_impl, (n))
219#define _GLIBCXX_ASAN_ANNOTATE_GREW(n) __grow_guard._M_grew(n)
220#define _GLIBCXX_ASAN_ANNOTATE_SHRINK(n) \
221 _Base::_Vector_impl::template _Asan<>::_S_shrink(this->_M_impl, n)
222#define _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC \
223 _Base::_Vector_impl::template _Asan<>::_S_on_dealloc(this->_M_impl)
224#else // ! (_GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR)
225#define _GLIBCXX_ASAN_ANNOTATE_REINIT
226#define _GLIBCXX_ASAN_ANNOTATE_GROW(n)
227#define _GLIBCXX_ASAN_ANNOTATE_GREW(n)
228#define _GLIBCXX_ASAN_ANNOTATE_SHRINK(n)
229#define _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC
230#endif // _GLIBCXX_SANITIZE_STD_ALLOCATOR && _GLIBCXX_SANITIZE_VECTOR
231 };
232
233 public:
234 typedef _Alloc allocator_type;
235
236 _Tp_alloc_type&
237 _M_get_Tp_allocator() _GLIBCXX_NOEXCEPT
238 { return *static_cast<_Tp_alloc_type*>(&this->_M_impl); }
239
240 const _Tp_alloc_type&
241 _M_get_Tp_allocator() const _GLIBCXX_NOEXCEPT
242 { return *static_cast<const _Tp_alloc_type*>(&this->_M_impl); }
243
244 allocator_type
245 get_allocator() const _GLIBCXX_NOEXCEPT
246 { return allocator_type(_M_get_Tp_allocator()); }
247
248 _Vector_base()
249 : _M_impl() { }
250
251 _Vector_base(const allocator_type& __a) _GLIBCXX_NOEXCEPT
252 : _M_impl(__a) { }
253
254 _Vector_base(size_t __n)
255 : _M_impl()
256 { _M_create_storage(__n); }
257
258 _Vector_base(size_t __n, const allocator_type& __a)
259 : _M_impl(__a)
260 { _M_create_storage(__n); }
261
262#if __cplusplus >= 201103L
263 _Vector_base(_Tp_alloc_type&& __a) noexcept
264 : _M_impl(std::move(__a)) { }
265
266 _Vector_base(_Vector_base&& __x) noexcept
267 : _M_impl(std::move(__x._M_get_Tp_allocator()))
268 { this->_M_impl._M_swap_data(__x._M_impl); }
269
270 _Vector_base(_Vector_base&& __x, const allocator_type& __a)
271 : _M_impl(__a)
272 {
273 if (__x.get_allocator() == __a)
274 this->_M_impl._M_swap_data(__x._M_impl);
275 else
276 {
277 size_t __n = __x._M_impl._M_finish - __x._M_impl._M_start;
278 _M_create_storage(__n);
279 }
280 }
281#endif
282
283 ~_Vector_base() _GLIBCXX_NOEXCEPT
284 {
285 _M_deallocate(_M_impl._M_start,
286 _M_impl._M_end_of_storage - _M_impl._M_start);
287 }
288
289 public:
290 _Vector_impl _M_impl;
291
292 pointer
293 _M_allocate(size_t __n)
294 {
295 typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Tr;
296 return __n != 0 ? _Tr::allocate(_M_impl, __n) : pointer();
297 }
298
299 void
300 _M_deallocate(pointer __p, size_t __n)
301 {
302 typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Tr;
303 if (__p)
304 _Tr::deallocate(_M_impl, __p, __n);
305 }
306
307 private:
308 void
309 _M_create_storage(size_t __n)
310 {
311 this->_M_impl._M_start = this->_M_allocate(__n);
312 this->_M_impl._M_finish = this->_M_impl._M_start;
313 this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
314 }
315 };
316
317 /**
318 * @brief A standard container which offers fixed time access to
319 * individual elements in any order.
320 *
321 * @ingroup sequences
322 *
323 * @tparam _Tp Type of element.
324 * @tparam _Alloc Allocator type, defaults to allocator<_Tp>.
325 *
326 * Meets the requirements of a <a href="tables.html#65">container</a>, a
327 * <a href="tables.html#66">reversible container</a>, and a
328 * <a href="tables.html#67">sequence</a>, including the
329 * <a href="tables.html#68">optional sequence requirements</a> with the
330 * %exception of @c push_front and @c pop_front.
331 *
332 * In some terminology a %vector can be described as a dynamic
333 * C-style array, it offers fast and efficient access to individual
334 * elements in any order and saves the user from worrying about
335 * memory and size allocation. Subscripting ( @c [] ) access is
336 * also provided as with C-style arrays.
337 */
338 template<typename _Tp, typename _Alloc = std::allocator<_Tp> >
339 class vector : protected _Vector_base<_Tp, _Alloc>
340 {
341#ifdef _GLIBCXX_CONCEPT_CHECKS
342 // Concept requirements.
343 typedef typename _Alloc::value_type _Alloc_value_type;
344# if __cplusplus < 201103L
345 __glibcxx_class_requires(_Tp, _SGIAssignableConcept)
346# endif
347 __glibcxx_class_requires2(_Tp, _Alloc_value_type, _SameTypeConcept)
348#endif
349
350#if __cplusplus >= 201103L
351 static_assert(is_same<typename remove_cv<_Tp>::type, _Tp>::value,
352 "std::vector must have a non-const, non-volatile value_type");
353# ifdef __STRICT_ANSI__
354 static_assert(is_same<typename _Alloc::value_type, _Tp>::value,
355 "std::vector must have the same value_type as its allocator");
356# endif
357#endif
358
359 typedef _Vector_base<_Tp, _Alloc> _Base;
360 typedef typename _Base::_Tp_alloc_type _Tp_alloc_type;
361 typedef __gnu_cxx::__alloc_traits<_Tp_alloc_type> _Alloc_traits;
362
363 public:
364 typedef _Tp value_type;
365 typedef typename _Base::pointer pointer;
366 typedef typename _Alloc_traits::const_pointer const_pointer;
367 typedef typename _Alloc_traits::reference reference;
368 typedef typename _Alloc_traits::const_reference const_reference;
369 typedef __gnu_cxx::__normal_iterator<pointer, vector> iterator;
370 typedef __gnu_cxx::__normal_iterator<const_pointer, vector>
371 const_iterator;
372 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
373 typedef std::reverse_iterator<iterator> reverse_iterator;
374 typedef size_t size_type;
375 typedef ptrdiff_t difference_type;
376 typedef _Alloc allocator_type;
377
378 protected:
379 using _Base::_M_allocate;
380 using _Base::_M_deallocate;
381 using _Base::_M_impl;
382 using _Base::_M_get_Tp_allocator;
383
384 public:
385 // [23.2.4.1] construct/copy/destroy
386 // (assign() and get_allocator() are also listed in this section)
387
388 /**
389 * @brief Creates a %vector with no elements.
390 */
391 vector()
392#if __cplusplus >= 201103L
393 noexcept(is_nothrow_default_constructible<_Alloc>::value)
394#endif
395 : _Base() { }
396
397 /**
398 * @brief Creates a %vector with no elements.
399 * @param __a An allocator object.
400 */
401 explicit
402 vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT
403 : _Base(__a) { }
404
405#if __cplusplus >= 201103L
406 /**
407 * @brief Creates a %vector with default constructed elements.
408 * @param __n The number of elements to initially create.
409 * @param __a An allocator.
410 *
411 * This constructor fills the %vector with @a __n default
412 * constructed elements.
413 */
414 explicit
415 vector(size_type __n, const allocator_type& __a = allocator_type())
416 : _Base(__n, __a)
417 { _M_default_initialize(__n); }
418
419 /**
420 * @brief Creates a %vector with copies of an exemplar element.
421 * @param __n The number of elements to initially create.
422 * @param __value An element to copy.
423 * @param __a An allocator.
424 *
425 * This constructor fills the %vector with @a __n copies of @a __value.
426 */
427 vector(size_type __n, const value_type& __value,
428 const allocator_type& __a = allocator_type())
429 : _Base(__n, __a)
430 { _M_fill_initialize(__n, __value); }
431#else
432 /**
433 * @brief Creates a %vector with copies of an exemplar element.
434 * @param __n The number of elements to initially create.
435 * @param __value An element to copy.
436 * @param __a An allocator.
437 *
438 * This constructor fills the %vector with @a __n copies of @a __value.
439 */
440 explicit
441 vector(size_type __n, const value_type& __value = value_type(),
442 const allocator_type& __a = allocator_type())
443 : _Base(__n, __a)
444 { _M_fill_initialize(__n, __value); }
445#endif
446
447 /**
448 * @brief %Vector copy constructor.
449 * @param __x A %vector of identical element and allocator types.
450 *
451 * All the elements of @a __x are copied, but any unused capacity in
452 * @a __x will not be copied
453 * (i.e. capacity() == size() in the new %vector).
454 *
455 * The newly-created %vector uses a copy of the allocator object used
456 * by @a __x (unless the allocator traits dictate a different object).
457 */
458 vector(const vector& __x)
459 : _Base(__x.size(),
460 _Alloc_traits::_S_select_on_copy(__x._M_get_Tp_allocator()))
461 {
462 this->_M_impl._M_finish =
463 std::__uninitialized_copy_a(__x.begin(), __x.end(),
464 this->_M_impl._M_start,
465 _M_get_Tp_allocator());
466 }
467
468#if __cplusplus >= 201103L
469 /**
470 * @brief %Vector move constructor.
471 * @param __x A %vector of identical element and allocator types.
472 *
473 * The newly-created %vector contains the exact contents of @a __x.
474 * The contents of @a __x are a valid, but unspecified %vector.
475 */
476 vector(vector&& __x) noexcept
477 : _Base(std::move(__x)) { }
478
479 /// Copy constructor with alternative allocator
480 vector(const vector& __x, const allocator_type& __a)
481 : _Base(__x.size(), __a)
482 {
483 this->_M_impl._M_finish =
484 std::__uninitialized_copy_a(__x.begin(), __x.end(),
485 this->_M_impl._M_start,
486 _M_get_Tp_allocator());
487 }
488
489 /// Move constructor with alternative allocator
490 vector(vector&& __rv, const allocator_type& __m)
491 noexcept(_Alloc_traits::_S_always_equal())
492 : _Base(std::move(__rv), __m)
493 {
494 if (__rv.get_allocator() != __m)
495 {
496 this->_M_impl._M_finish =
497 std::__uninitialized_move_a(__rv.begin(), __rv.end(),
498 this->_M_impl._M_start,
499 _M_get_Tp_allocator());
500 __rv.clear();
501 }
502 }
503
504 /**
505 * @brief Builds a %vector from an initializer list.
506 * @param __l An initializer_list.
507 * @param __a An allocator.
508 *
509 * Create a %vector consisting of copies of the elements in the
510 * initializer_list @a __l.
511 *
512 * This will call the element type's copy constructor N times
513 * (where N is @a __l.size()) and do no memory reallocation.
514 */
515 vector(initializer_list<value_type> __l,
516 const allocator_type& __a = allocator_type())
517 : _Base(__a)
518 {
519 _M_range_initialize(__l.begin(), __l.end(),
520 random_access_iterator_tag());
521 }
522#endif
523
524 /**
525 * @brief Builds a %vector from a range.
526 * @param __first An input iterator.
527 * @param __last An input iterator.
528 * @param __a An allocator.
529 *
530 * Create a %vector consisting of copies of the elements from
531 * [first,last).
532 *
533 * If the iterators are forward, bidirectional, or
534 * random-access, then this will call the elements' copy
535 * constructor N times (where N is distance(first,last)) and do
536 * no memory reallocation. But if only input iterators are
537 * used, then this will do at most 2N calls to the copy
538 * constructor, and logN memory reallocations.
539 */
540#if __cplusplus >= 201103L
541 template<typename _InputIterator,
542 typename = std::_RequireInputIter<_InputIterator>>
543 vector(_InputIterator __first, _InputIterator __last,
544 const allocator_type& __a = allocator_type())
545 : _Base(__a)
546 { _M_initialize_dispatch(__first, __last, __false_type()); }
547#else
548 template<typename _InputIterator>
549 vector(_InputIterator __first, _InputIterator __last,
550 const allocator_type& __a = allocator_type())
551 : _Base(__a)
552 {
553 // Check whether it's an integral type. If so, it's not an iterator.
554 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
555 _M_initialize_dispatch(__first, __last, _Integral());
556 }
557#endif
558
559 /**
560 * The dtor only erases the elements, and note that if the
561 * elements themselves are pointers, the pointed-to memory is
562 * not touched in any way. Managing the pointer is the user's
563 * responsibility.
564 */
565 ~vector() _GLIBCXX_NOEXCEPT
566 {
567 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
568 _M_get_Tp_allocator());
569 _GLIBCXX_ASAN_ANNOTATE_BEFORE_DEALLOC;
570 }
571
572 /**
573 * @brief %Vector assignment operator.
574 * @param __x A %vector of identical element and allocator types.
575 *
576 * All the elements of @a __x are copied, but any unused capacity in
577 * @a __x will not be copied.
578 *
579 * Whether the allocator is copied depends on the allocator traits.
580 */
581 vector&
582 operator=(const vector& __x);
583
584#if __cplusplus >= 201103L
585 /**
586 * @brief %Vector move assignment operator.
587 * @param __x A %vector of identical element and allocator types.
588 *
589 * The contents of @a __x are moved into this %vector (without copying,
590 * if the allocators permit it).
591 * Afterwards @a __x is a valid, but unspecified %vector.
592 *
593 * Whether the allocator is moved depends on the allocator traits.
594 */
595 vector&
596 operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
597 {
598 constexpr bool __move_storage =
599 _Alloc_traits::_S_propagate_on_move_assign()
600 || _Alloc_traits::_S_always_equal();
601 _M_move_assign(std::move(__x), __bool_constant<__move_storage>());
602 return *this;
603 }
604
605 /**
606 * @brief %Vector list assignment operator.
607 * @param __l An initializer_list.
608 *
609 * This function fills a %vector with copies of the elements in the
610 * initializer list @a __l.
611 *
612 * Note that the assignment completely changes the %vector and
613 * that the resulting %vector's size is the same as the number
614 * of elements assigned.
615 */
616 vector&
617 operator=(initializer_list<value_type> __l)
618 {
619 this->_M_assign_aux(__l.begin(), __l.end(),
620 random_access_iterator_tag());
621 return *this;
622 }
623#endif
624
625 /**
626 * @brief Assigns a given value to a %vector.
627 * @param __n Number of elements to be assigned.
628 * @param __val Value to be assigned.
629 *
630 * This function fills a %vector with @a __n copies of the given
631 * value. Note that the assignment completely changes the
632 * %vector and that the resulting %vector's size is the same as
633 * the number of elements assigned.
634 */
635 void
636 assign(size_type __n, const value_type& __val)
637 { _M_fill_assign(__n, __val); }
638
639 /**
640 * @brief Assigns a range to a %vector.
641 * @param __first An input iterator.
642 * @param __last An input iterator.
643 *
644 * This function fills a %vector with copies of the elements in the
645 * range [__first,__last).
646 *
647 * Note that the assignment completely changes the %vector and
648 * that the resulting %vector's size is the same as the number
649 * of elements assigned.
650 */
651#if __cplusplus >= 201103L
652 template<typename _InputIterator,
653 typename = std::_RequireInputIter<_InputIterator>>
654 void
655 assign(_InputIterator __first, _InputIterator __last)
656 { _M_assign_dispatch(__first, __last, __false_type()); }
657#else
658 template<typename _InputIterator>
659 void
660 assign(_InputIterator __first, _InputIterator __last)
661 {
662 // Check whether it's an integral type. If so, it's not an iterator.
663 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
664 _M_assign_dispatch(__first, __last, _Integral());
665 }
666#endif
667
668#if __cplusplus >= 201103L
669 /**
670 * @brief Assigns an initializer list to a %vector.
671 * @param __l An initializer_list.
672 *
673 * This function fills a %vector with copies of the elements in the
674 * initializer list @a __l.
675 *
676 * Note that the assignment completely changes the %vector and
677 * that the resulting %vector's size is the same as the number
678 * of elements assigned.
679 */
680 void
681 assign(initializer_list<value_type> __l)
682 {
683 this->_M_assign_aux(__l.begin(), __l.end(),
684 random_access_iterator_tag());
685 }
686#endif
687
688 /// Get a copy of the memory allocation object.
689 using _Base::get_allocator;
690
691 // iterators
692 /**
693 * Returns a read/write iterator that points to the first
694 * element in the %vector. Iteration is done in ordinary
695 * element order.
696 */
697 iterator
698 begin() _GLIBCXX_NOEXCEPT
699 { return iterator(this->_M_impl._M_start); }
700
701 /**
702 * Returns a read-only (constant) iterator that points to the
703 * first element in the %vector. Iteration is done in ordinary
704 * element order.
705 */
706 const_iterator
707 begin() const _GLIBCXX_NOEXCEPT
708 { return const_iterator(this->_M_impl._M_start); }
709
710 /**
711 * Returns a read/write iterator that points one past the last
712 * element in the %vector. Iteration is done in ordinary
713 * element order.
714 */
715 iterator
716 end() _GLIBCXX_NOEXCEPT
717 { return iterator(this->_M_impl._M_finish); }
718
719 /**
720 * Returns a read-only (constant) iterator that points one past
721 * the last element in the %vector. Iteration is done in
722 * ordinary element order.
723 */
724 const_iterator
725 end() const _GLIBCXX_NOEXCEPT
726 { return const_iterator(this->_M_impl._M_finish); }
727
728 /**
729 * Returns a read/write reverse iterator that points to the
730 * last element in the %vector. Iteration is done in reverse
731 * element order.
732 */
733 reverse_iterator
734 rbegin() _GLIBCXX_NOEXCEPT
735 { return reverse_iterator(end()); }
736
737 /**
738 * Returns a read-only (constant) reverse iterator that points
739 * to the last element in the %vector. Iteration is done in
740 * reverse element order.
741 */
742 const_reverse_iterator
743 rbegin() const _GLIBCXX_NOEXCEPT
744 { return const_reverse_iterator(end()); }
745
746 /**
747 * Returns a read/write reverse iterator that points to one
748 * before the first element in the %vector. Iteration is done
749 * in reverse element order.
750 */
751 reverse_iterator
752 rend() _GLIBCXX_NOEXCEPT
753 { return reverse_iterator(begin()); }
754
755 /**
756 * Returns a read-only (constant) reverse iterator that points
757 * to one before the first element in the %vector. Iteration
758 * is done in reverse element order.
759 */
760 const_reverse_iterator
761 rend() const _GLIBCXX_NOEXCEPT
762 { return const_reverse_iterator(begin()); }
763
764#if __cplusplus >= 201103L
765 /**
766 * Returns a read-only (constant) iterator that points to the
767 * first element in the %vector. Iteration is done in ordinary
768 * element order.
769 */
770 const_iterator
771 cbegin() const noexcept
772 { return const_iterator(this->_M_impl._M_start); }
773
774 /**
775 * Returns a read-only (constant) iterator that points one past
776 * the last element in the %vector. Iteration is done in
777 * ordinary element order.
778 */
779 const_iterator
780 cend() const noexcept
781 { return const_iterator(this->_M_impl._M_finish); }
782
783 /**
784 * Returns a read-only (constant) reverse iterator that points
785 * to the last element in the %vector. Iteration is done in
786 * reverse element order.
787 */
788 const_reverse_iterator
789 crbegin() const noexcept
790 { return const_reverse_iterator(end()); }
791
792 /**
793 * Returns a read-only (constant) reverse iterator that points
794 * to one before the first element in the %vector. Iteration
795 * is done in reverse element order.
796 */
797 const_reverse_iterator
798 crend() const noexcept
799 { return const_reverse_iterator(begin()); }
800#endif
801
802 // [23.2.4.2] capacity
803 /** Returns the number of elements in the %vector. */
804 size_type
805 size() const _GLIBCXX_NOEXCEPT
806 { return size_type(this->_M_impl._M_finish - this->_M_impl._M_start); }
807
808 /** Returns the size() of the largest possible %vector. */
809 size_type
810 max_size() const _GLIBCXX_NOEXCEPT
811 { return _Alloc_traits::max_size(_M_get_Tp_allocator()); }
812
813#if __cplusplus >= 201103L
814 /**
815 * @brief Resizes the %vector to the specified number of elements.
816 * @param __new_size Number of elements the %vector should contain.
817 *
818 * This function will %resize the %vector to the specified
819 * number of elements. If the number is smaller than the
820 * %vector's current size the %vector is truncated, otherwise
821 * default constructed elements are appended.
822 */
823 void
824 resize(size_type __new_size)
825 {
826 if (__new_size > size())
827 _M_default_append(__new_size - size());
828 else if (__new_size < size())
829 _M_erase_at_end(this->_M_impl._M_start + __new_size);
830 }
831
832 /**
833 * @brief Resizes the %vector to the specified number of elements.
834 * @param __new_size Number of elements the %vector should contain.
835 * @param __x Data with which new elements should be populated.
836 *
837 * This function will %resize the %vector to the specified
838 * number of elements. If the number is smaller than the
839 * %vector's current size the %vector is truncated, otherwise
840 * the %vector is extended and new elements are populated with
841 * given data.
842 */
843 void
844 resize(size_type __new_size, const value_type& __x)
845 {
846 if (__new_size > size())
847 _M_fill_insert(end(), __new_size - size(), __x);
848 else if (__new_size < size())
849 _M_erase_at_end(this->_M_impl._M_start + __new_size);
850 }
851#else
852 /**
853 * @brief Resizes the %vector to the specified number of elements.
854 * @param __new_size Number of elements the %vector should contain.
855 * @param __x Data with which new elements should be populated.
856 *
857 * This function will %resize the %vector to the specified
858 * number of elements. If the number is smaller than the
859 * %vector's current size the %vector is truncated, otherwise
860 * the %vector is extended and new elements are populated with
861 * given data.
862 */
863 void
864 resize(size_type __new_size, value_type __x = value_type())
865 {
866 if (__new_size > size())
867 _M_fill_insert(end(), __new_size - size(), __x);
868 else if (__new_size < size())
869 _M_erase_at_end(this->_M_impl._M_start + __new_size);
870 }
871#endif
872
873#if __cplusplus >= 201103L
874 /** A non-binding request to reduce capacity() to size(). */
875 void
876 shrink_to_fit()
877 { _M_shrink_to_fit(); }
878#endif
879
880 /**
881 * Returns the total number of elements that the %vector can
882 * hold before needing to allocate more memory.
883 */
884 size_type
885 capacity() const _GLIBCXX_NOEXCEPT
886 { return size_type(this->_M_impl._M_end_of_storage
887 - this->_M_impl._M_start); }
888
889 /**
890 * Returns true if the %vector is empty. (Thus begin() would
891 * equal end().)
892 */
893 bool
894 empty() const _GLIBCXX_NOEXCEPT
895 { return begin() == end(); }
896
897 /**
898 * @brief Attempt to preallocate enough memory for specified number of
899 * elements.
900 * @param __n Number of elements required.
901 * @throw std::length_error If @a n exceeds @c max_size().
902 *
903 * This function attempts to reserve enough memory for the
904 * %vector to hold the specified number of elements. If the
905 * number requested is more than max_size(), length_error is
906 * thrown.
907 *
908 * The advantage of this function is that if optimal code is a
909 * necessity and the user can determine the number of elements
910 * that will be required, the user can reserve the memory in
911 * %advance, and thus prevent a possible reallocation of memory
912 * and copying of %vector data.
913 */
914 void
915 reserve(size_type __n);
916
917 // element access
918 /**
919 * @brief Subscript access to the data contained in the %vector.
920 * @param __n The index of the element for which data should be
921 * accessed.
922 * @return Read/write reference to data.
923 *
924 * This operator allows for easy, array-style, data access.
925 * Note that data access with this operator is unchecked and
926 * out_of_range lookups are not defined. (For checked lookups
927 * see at().)
928 */
929 reference
930 operator[](size_type __n) _GLIBCXX_NOEXCEPT
931 {
932 __glibcxx_requires_subscript(__n);
933 return *(this->_M_impl._M_start + __n);
934 }
935
936 /**
937 * @brief Subscript access to the data contained in the %vector.
938 * @param __n The index of the element for which data should be
939 * accessed.
940 * @return Read-only (constant) reference to data.
941 *
942 * This operator allows for easy, array-style, data access.
943 * Note that data access with this operator is unchecked and
944 * out_of_range lookups are not defined. (For checked lookups
945 * see at().)
946 */
947 const_reference
948 operator[](size_type __n) const _GLIBCXX_NOEXCEPT
949 {
950 __glibcxx_requires_subscript(__n);
951 return *(this->_M_impl._M_start + __n);
952 }
953
954 protected:
955 /// Safety check used only from at().
956 void
957 _M_range_check(size_type __n) const
958 {
959 if (__n >= this->size())
960 __throw_out_of_range_fmt(__N("vector::_M_range_check: __n "
961 "(which is %zu) >= this->size() "
962 "(which is %zu)"),
963 __n, this->size());
964 }
965
966 public:
967 /**
968 * @brief Provides access to the data contained in the %vector.
969 * @param __n The index of the element for which data should be
970 * accessed.
971 * @return Read/write reference to data.
972 * @throw std::out_of_range If @a __n is an invalid index.
973 *
974 * This function provides for safer data access. The parameter
975 * is first checked that it is in the range of the vector. The
976 * function throws out_of_range if the check fails.
977 */
978 reference
979 at(size_type __n)
980 {
981 _M_range_check(__n);
982 return (*this)[__n];
983 }
984
985 /**
986 * @brief Provides access to the data contained in the %vector.
987 * @param __n The index of the element for which data should be
988 * accessed.
989 * @return Read-only (constant) reference to data.
990 * @throw std::out_of_range If @a __n is an invalid index.
991 *
992 * This function provides for safer data access. The parameter
993 * is first checked that it is in the range of the vector. The
994 * function throws out_of_range if the check fails.
995 */
996 const_reference
997 at(size_type __n) const
998 {
999 _M_range_check(__n);
1000 return (*this)[__n];
1001 }
1002
1003 /**
1004 * Returns a read/write reference to the data at the first
1005 * element of the %vector.
1006 */
1007 reference
1008 front() _GLIBCXX_NOEXCEPT
1009 {
1010 __glibcxx_requires_nonempty();
1011 return *begin();
1012 }
1013
1014 /**
1015 * Returns a read-only (constant) reference to the data at the first
1016 * element of the %vector.
1017 */
1018 const_reference
1019 front() const _GLIBCXX_NOEXCEPT
1020 {
1021 __glibcxx_requires_nonempty();
1022 return *begin();
1023 }
1024
1025 /**
1026 * Returns a read/write reference to the data at the last
1027 * element of the %vector.
1028 */
1029 reference
1030 back() _GLIBCXX_NOEXCEPT
1031 {
1032 __glibcxx_requires_nonempty();
1033 return *(end() - 1);
1034 }
1035
1036 /**
1037 * Returns a read-only (constant) reference to the data at the
1038 * last element of the %vector.
1039 */
1040 const_reference
1041 back() const _GLIBCXX_NOEXCEPT
1042 {
1043 __glibcxx_requires_nonempty();
1044 return *(end() - 1);
1045 }
1046
1047 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1048 // DR 464. Suggestion for new member functions in standard containers.
1049 // data access
1050 /**
1051 * Returns a pointer such that [data(), data() + size()) is a valid
1052 * range. For a non-empty %vector, data() == &front().
1053 */
1054 _Tp*
1055 data() _GLIBCXX_NOEXCEPT
1056 { return _M_data_ptr(this->_M_impl._M_start); }
1057
1058 const _Tp*
1059 data() const _GLIBCXX_NOEXCEPT
1060 { return _M_data_ptr(this->_M_impl._M_start); }
1061
1062 // [23.2.4.3] modifiers
1063 /**
1064 * @brief Add data to the end of the %vector.
1065 * @param __x Data to be added.
1066 *
1067 * This is a typical stack operation. The function creates an
1068 * element at the end of the %vector and assigns the given data
1069 * to it. Due to the nature of a %vector this operation can be
1070 * done in constant time if the %vector has preallocated space
1071 * available.
1072 */
1073 void
1074 push_back(const value_type& __x)
1075 {
1076 if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
1077 {
1078 _GLIBCXX_ASAN_ANNOTATE_GROW(1);
1079 _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
1080 __x);
1081 ++this->_M_impl._M_finish;
1082 _GLIBCXX_ASAN_ANNOTATE_GREW(1);
1083 }
1084 else
1085 _M_realloc_insert(end(), __x);
1086 }
1087
1088#if __cplusplus >= 201103L
1089 void
1090 push_back(value_type&& __x)
1091 { emplace_back(std::move(__x)); }
1092
1093 template<typename... _Args>
1094#if __cplusplus > 201402L
1095 reference
1096#else
1097 void
1098#endif
1099 emplace_back(_Args&&... __args);
1100#endif
1101
1102 /**
1103 * @brief Removes last element.
1104 *
1105 * This is a typical stack operation. It shrinks the %vector by one.
1106 *
1107 * Note that no data is returned, and if the last element's
1108 * data is needed, it should be retrieved before pop_back() is
1109 * called.
1110 */
1111 void
1112 pop_back() _GLIBCXX_NOEXCEPT
1113 {
1114 __glibcxx_requires_nonempty();
1115 --this->_M_impl._M_finish;
1116 _Alloc_traits::destroy(this->_M_impl, this->_M_impl._M_finish);
1117 _GLIBCXX_ASAN_ANNOTATE_SHRINK(1);
1118 }
1119
1120#if __cplusplus >= 201103L
1121 /**
1122 * @brief Inserts an object in %vector before specified iterator.
1123 * @param __position A const_iterator into the %vector.
1124 * @param __args Arguments.
1125 * @return An iterator that points to the inserted data.
1126 *
1127 * This function will insert an object of type T constructed
1128 * with T(std::forward<Args>(args)...) before the specified location.
1129 * Note that this kind of operation could be expensive for a %vector
1130 * and if it is frequently used the user should consider using
1131 * std::list.
1132 */
1133 template<typename... _Args>
1134 iterator
1135 emplace(const_iterator __position, _Args&&... __args)
1136 { return _M_emplace_aux(__position, std::forward<_Args>(__args)...); }
1137
1138 /**
1139 * @brief Inserts given value into %vector before specified iterator.
1140 * @param __position A const_iterator into the %vector.
1141 * @param __x Data to be inserted.
1142 * @return An iterator that points to the inserted data.
1143 *
1144 * This function will insert a copy of the given value before
1145 * the specified location. Note that this kind of operation
1146 * could be expensive for a %vector and if it is frequently
1147 * used the user should consider using std::list.
1148 */
1149 iterator
1150 insert(const_iterator __position, const value_type& __x);
1151#else
1152 /**
1153 * @brief Inserts given value into %vector before specified iterator.
1154 * @param __position An iterator into the %vector.
1155 * @param __x Data to be inserted.
1156 * @return An iterator that points to the inserted data.
1157 *
1158 * This function will insert a copy of the given value before
1159 * the specified location. Note that this kind of operation
1160 * could be expensive for a %vector and if it is frequently
1161 * used the user should consider using std::list.
1162 */
1163 iterator
1164 insert(iterator __position, const value_type& __x);
1165#endif
1166
1167#if __cplusplus >= 201103L
1168 /**
1169 * @brief Inserts given rvalue into %vector before specified iterator.
1170 * @param __position A const_iterator into the %vector.
1171 * @param __x Data to be inserted.
1172 * @return An iterator that points to the inserted data.
1173 *
1174 * This function will insert a copy of the given rvalue before
1175 * the specified location. Note that this kind of operation
1176 * could be expensive for a %vector and if it is frequently
1177 * used the user should consider using std::list.
1178 */
1179 iterator
1180 insert(const_iterator __position, value_type&& __x)
1181 { return _M_insert_rval(__position, std::move(__x)); }
1182
1183 /**
1184 * @brief Inserts an initializer_list into the %vector.
1185 * @param __position An iterator into the %vector.
1186 * @param __l An initializer_list.
1187 *
1188 * This function will insert copies of the data in the
1189 * initializer_list @a l into the %vector before the location
1190 * specified by @a position.
1191 *
1192 * Note that this kind of operation could be expensive for a
1193 * %vector and if it is frequently used the user should
1194 * consider using std::list.
1195 */
1196 iterator
1197 insert(const_iterator __position, initializer_list<value_type> __l)
1198 {
1199 auto __offset = __position - cbegin();
1200 _M_range_insert(begin() + __offset, __l.begin(), __l.end(),
1201 std::random_access_iterator_tag());
1202 return begin() + __offset;
1203 }
1204#endif
1205
1206#if __cplusplus >= 201103L
1207 /**
1208 * @brief Inserts a number of copies of given data into the %vector.
1209 * @param __position A const_iterator into the %vector.
1210 * @param __n Number of elements to be inserted.
1211 * @param __x Data to be inserted.
1212 * @return An iterator that points to the inserted data.
1213 *
1214 * This function will insert a specified number of copies of
1215 * the given data before the location specified by @a position.
1216 *
1217 * Note that this kind of operation could be expensive for a
1218 * %vector and if it is frequently used the user should
1219 * consider using std::list.
1220 */
1221 iterator
1222 insert(const_iterator __position, size_type __n, const value_type& __x)
1223 {
1224 difference_type __offset = __position - cbegin();
1225 _M_fill_insert(begin() + __offset, __n, __x);
1226 return begin() + __offset;
1227 }
1228#else
1229 /**
1230 * @brief Inserts a number of copies of given data into the %vector.
1231 * @param __position An iterator into the %vector.
1232 * @param __n Number of elements to be inserted.
1233 * @param __x Data to be inserted.
1234 *
1235 * This function will insert a specified number of copies of
1236 * the given data before the location specified by @a position.
1237 *
1238 * Note that this kind of operation could be expensive for a
1239 * %vector and if it is frequently used the user should
1240 * consider using std::list.
1241 */
1242 void
1243 insert(iterator __position, size_type __n, const value_type& __x)
1244 { _M_fill_insert(__position, __n, __x); }
1245#endif
1246
1247#if __cplusplus >= 201103L
1248 /**
1249 * @brief Inserts a range into the %vector.
1250 * @param __position A const_iterator into the %vector.
1251 * @param __first An input iterator.
1252 * @param __last An input iterator.
1253 * @return An iterator that points to the inserted data.
1254 *
1255 * This function will insert copies of the data in the range
1256 * [__first,__last) into the %vector before the location specified
1257 * by @a pos.
1258 *
1259 * Note that this kind of operation could be expensive for a
1260 * %vector and if it is frequently used the user should
1261 * consider using std::list.
1262 */
1263 template<typename _InputIterator,
1264 typename = std::_RequireInputIter<_InputIterator>>
1265 iterator
1266 insert(const_iterator __position, _InputIterator __first,
1267 _InputIterator __last)
1268 {
1269 difference_type __offset = __position - cbegin();
1270 _M_insert_dispatch(begin() + __offset,
1271 __first, __last, __false_type());
1272 return begin() + __offset;
1273 }
1274#else
1275 /**
1276 * @brief Inserts a range into the %vector.
1277 * @param __position An iterator into the %vector.
1278 * @param __first An input iterator.
1279 * @param __last An input iterator.
1280 *
1281 * This function will insert copies of the data in the range
1282 * [__first,__last) into the %vector before the location specified
1283 * by @a pos.
1284 *
1285 * Note that this kind of operation could be expensive for a
1286 * %vector and if it is frequently used the user should
1287 * consider using std::list.
1288 */
1289 template<typename _InputIterator>
1290 void
1291 insert(iterator __position, _InputIterator __first,
1292 _InputIterator __last)
1293 {
1294 // Check whether it's an integral type. If so, it's not an iterator.
1295 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
1296 _M_insert_dispatch(__position, __first, __last, _Integral());
1297 }
1298#endif
1299
1300 /**
1301 * @brief Remove element at given position.
1302 * @param __position Iterator pointing to element to be erased.
1303 * @return An iterator pointing to the next element (or end()).
1304 *
1305 * This function will erase the element at the given position and thus
1306 * shorten the %vector by one.
1307 *
1308 * Note This operation could be expensive and if it is
1309 * frequently used the user should consider using std::list.
1310 * The user is also cautioned that this function only erases
1311 * the element, and that if the element is itself a pointer,
1312 * the pointed-to memory is not touched in any way. Managing
1313 * the pointer is the user's responsibility.
1314 */
1315 iterator
1316#if __cplusplus >= 201103L
1317 erase(const_iterator __position)
1318 { return _M_erase(begin() + (__position - cbegin())); }
1319#else
1320 erase(iterator __position)
1321 { return _M_erase(__position); }
1322#endif
1323
1324 /**
1325 * @brief Remove a range of elements.
1326 * @param __first Iterator pointing to the first element to be erased.
1327 * @param __last Iterator pointing to one past the last element to be
1328 * erased.
1329 * @return An iterator pointing to the element pointed to by @a __last
1330 * prior to erasing (or end()).
1331 *
1332 * This function will erase the elements in the range
1333 * [__first,__last) and shorten the %vector accordingly.
1334 *
1335 * Note This operation could be expensive and if it is
1336 * frequently used the user should consider using std::list.
1337 * The user is also cautioned that this function only erases
1338 * the elements, and that if the elements themselves are
1339 * pointers, the pointed-to memory is not touched in any way.
1340 * Managing the pointer is the user's responsibility.
1341 */
1342 iterator
1343#if __cplusplus >= 201103L
1344 erase(const_iterator __first, const_iterator __last)
1345 {
1346 const auto __beg = begin();
1347 const auto __cbeg = cbegin();
1348 return _M_erase(__beg + (__first - __cbeg), __beg + (__last - __cbeg));
1349 }
1350#else
1351 erase(iterator __first, iterator __last)
1352 { return _M_erase(__first, __last); }
1353#endif
1354
1355 /**
1356 * @brief Swaps data with another %vector.
1357 * @param __x A %vector of the same element and allocator types.
1358 *
1359 * This exchanges the elements between two vectors in constant time.
1360 * (Three pointers, so it should be quite fast.)
1361 * Note that the global std::swap() function is specialized such that
1362 * std::swap(v1,v2) will feed to this function.
1363 *
1364 * Whether the allocators are swapped depends on the allocator traits.
1365 */
1366 void
1367 swap(vector& __x) _GLIBCXX_NOEXCEPT
1368 {
1369#if __cplusplus >= 201103L
1370 __glibcxx_assert(_Alloc_traits::propagate_on_container_swap::value
1371 || _M_get_Tp_allocator() == __x._M_get_Tp_allocator());
1372#endif
1373 this->_M_impl._M_swap_data(__x._M_impl);
1374 _Alloc_traits::_S_on_swap(_M_get_Tp_allocator(),
1375 __x._M_get_Tp_allocator());
1376 }
1377
1378 /**
1379 * Erases all the elements. Note that this function only erases the
1380 * elements, and that if the elements themselves are pointers, the
1381 * pointed-to memory is not touched in any way. Managing the pointer is
1382 * the user's responsibility.
1383 */
1384 void
1385 clear() _GLIBCXX_NOEXCEPT
1386 { _M_erase_at_end(this->_M_impl._M_start); }
1387
1388 protected:
1389 /**
1390 * Memory expansion handler. Uses the member allocation function to
1391 * obtain @a n bytes of memory, and then copies [first,last) into it.
1392 */
1393 template<typename _ForwardIterator>
1394 pointer
1395 _M_allocate_and_copy(size_type __n,
1396 _ForwardIterator __first, _ForwardIterator __last)
1397 {
1398 pointer __result = this->_M_allocate(__n);
1399 __try
1400 {
1401 std::__uninitialized_copy_a(__first, __last, __result,
1402 _M_get_Tp_allocator());
1403 return __result;
1404 }
1405 __catch(...)
1406 {
1407 _M_deallocate(__result, __n);
1408 __throw_exception_again;
1409 }
1410 }
1411
1412
1413 // Internal constructor functions follow.
1414
1415 // Called by the range constructor to implement [23.1.1]/9
1416
1417 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1418 // 438. Ambiguity in the "do the right thing" clause
1419 template<typename _Integer>
1420 void
1421 _M_initialize_dispatch(_Integer __n, _Integer __value, __true_type)
1422 {
1423 this->_M_impl._M_start = _M_allocate(static_cast<size_type>(__n));
1424 this->_M_impl._M_end_of_storage =
1425 this->_M_impl._M_start + static_cast<size_type>(__n);
1426 _M_fill_initialize(static_cast<size_type>(__n), __value);
1427 }
1428
1429 // Called by the range constructor to implement [23.1.1]/9
1430 template<typename _InputIterator>
1431 void
1432 _M_initialize_dispatch(_InputIterator __first, _InputIterator __last,
1433 __false_type)
1434 {
1435 typedef typename std::iterator_traits<_InputIterator>::
1436 iterator_category _IterCategory;
1437 _M_range_initialize(__first, __last, _IterCategory());
1438 }
1439
1440 // Called by the second initialize_dispatch above
1441 template<typename _InputIterator>
1442 void
1443 _M_range_initialize(_InputIterator __first,
1444 _InputIterator __last, std::input_iterator_tag)
1445 {
1446 for (; __first != __last; ++__first)
1447#if __cplusplus >= 201103L
1448 emplace_back(*__first);
1449#else
1450 push_back(*__first);
1451#endif
1452 }
1453
1454 // Called by the second initialize_dispatch above
1455 template<typename _ForwardIterator>
1456 void
1457 _M_range_initialize(_ForwardIterator __first,
1458 _ForwardIterator __last, std::forward_iterator_tag)
1459 {
1460 const size_type __n = std::distance(__first, __last);
1461 this->_M_impl._M_start = this->_M_allocate(__n);
1462 this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
1463 this->_M_impl._M_finish =
1464 std::__uninitialized_copy_a(__first, __last,
1465 this->_M_impl._M_start,
1466 _M_get_Tp_allocator());
1467 }
1468
1469 // Called by the first initialize_dispatch above and by the
1470 // vector(n,value,a) constructor.
1471 void
1472 _M_fill_initialize(size_type __n, const value_type& __value)
1473 {
1474 this->_M_impl._M_finish =
1475 std::__uninitialized_fill_n_a(this->_M_impl._M_start, __n, __value,
1476 _M_get_Tp_allocator());
1477 }
1478
1479#if __cplusplus >= 201103L
1480 // Called by the vector(n) constructor.
1481 void
1482 _M_default_initialize(size_type __n)
1483 {
1484 this->_M_impl._M_finish =
1485 std::__uninitialized_default_n_a(this->_M_impl._M_start, __n,
1486 _M_get_Tp_allocator());
1487 }
1488#endif
1489
1490 // Internal assign functions follow. The *_aux functions do the actual
1491 // assignment work for the range versions.
1492
1493 // Called by the range assign to implement [23.1.1]/9
1494
1495 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1496 // 438. Ambiguity in the "do the right thing" clause
1497 template<typename _Integer>
1498 void
1499 _M_assign_dispatch(_Integer __n, _Integer __val, __true_type)
1500 { _M_fill_assign(__n, __val); }
1501
1502 // Called by the range assign to implement [23.1.1]/9
1503 template<typename _InputIterator>
1504 void
1505 _M_assign_dispatch(_InputIterator __first, _InputIterator __last,
1506 __false_type)
1507 { _M_assign_aux(__first, __last, std::__iterator_category(__first)); }
1508
1509 // Called by the second assign_dispatch above
1510 template<typename _InputIterator>
1511 void
1512 _M_assign_aux(_InputIterator __first, _InputIterator __last,
1513 std::input_iterator_tag);
1514
1515 // Called by the second assign_dispatch above
1516 template<typename _ForwardIterator>
1517 void
1518 _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
1519 std::forward_iterator_tag);
1520
1521 // Called by assign(n,t), and the range assign when it turns out
1522 // to be the same thing.
1523 void
1524 _M_fill_assign(size_type __n, const value_type& __val);
1525
1526 // Internal insert functions follow.
1527
1528 // Called by the range insert to implement [23.1.1]/9
1529
1530 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1531 // 438. Ambiguity in the "do the right thing" clause
1532 template<typename _Integer>
1533 void
1534 _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __val,
1535 __true_type)
1536 { _M_fill_insert(__pos, __n, __val); }
1537
1538 // Called by the range insert to implement [23.1.1]/9
1539 template<typename _InputIterator>
1540 void
1541 _M_insert_dispatch(iterator __pos, _InputIterator __first,
1542 _InputIterator __last, __false_type)
1543 {
1544 _M_range_insert(__pos, __first, __last,
1545 std::__iterator_category(__first));
1546 }
1547
1548 // Called by the second insert_dispatch above
1549 template<typename _InputIterator>
1550 void
1551 _M_range_insert(iterator __pos, _InputIterator __first,
1552 _InputIterator __last, std::input_iterator_tag);
1553
1554 // Called by the second insert_dispatch above
1555 template<typename _ForwardIterator>
1556 void
1557 _M_range_insert(iterator __pos, _ForwardIterator __first,
1558 _ForwardIterator __last, std::forward_iterator_tag);
1559
1560 // Called by insert(p,n,x), and the range insert when it turns out to be
1561 // the same thing.
1562 void
1563 _M_fill_insert(iterator __pos, size_type __n, const value_type& __x);
1564
1565#if __cplusplus >= 201103L
1566 // Called by resize(n).
1567 void
1568 _M_default_append(size_type __n);
1569
1570 bool
1571 _M_shrink_to_fit();
1572#endif
1573
1574#if __cplusplus < 201103L
1575 // Called by insert(p,x)
1576 void
1577 _M_insert_aux(iterator __position, const value_type& __x);
1578
1579 void
1580 _M_realloc_insert(iterator __position, const value_type& __x);
1581#else
1582 // A value_type object constructed with _Alloc_traits::construct()
1583 // and destroyed with _Alloc_traits::destroy().
1584 struct _Temporary_value
1585 {
1586 template<typename... _Args>
1587 explicit
1588 _Temporary_value(vector* __vec, _Args&&... __args) : _M_this(__vec)
1589 {
1590 _Alloc_traits::construct(_M_this->_M_impl, _M_ptr(),
1591 std::forward<_Args>(__args)...);
1592 }
1593
1594 ~_Temporary_value()
1595 { _Alloc_traits::destroy(_M_this->_M_impl, _M_ptr()); }
1596
1597 value_type&
1598 _M_val() { return *reinterpret_cast<_Tp*>(&__buf); }
1599
1600 private:
1601 pointer
1602 _M_ptr() { return pointer_traits<pointer>::pointer_to(_M_val()); }
1603
1604 vector* _M_this;
1605 typename aligned_storage<sizeof(_Tp), alignof(_Tp)>::type __buf;
1606 };
1607
1608 // Called by insert(p,x) and other functions when insertion needs to
1609 // reallocate or move existing elements. _Arg is either _Tp& or _Tp.
1610 template<typename _Arg>
1611 void
1612 _M_insert_aux(iterator __position, _Arg&& __arg);
1613
1614 template<typename... _Args>
1615 void
1616 _M_realloc_insert(iterator __position, _Args&&... __args);
1617
1618 // Either move-construct at the end, or forward to _M_insert_aux.
1619 iterator
1620 _M_insert_rval(const_iterator __position, value_type&& __v);
1621
1622 // Try to emplace at the end, otherwise forward to _M_insert_aux.
1623 template<typename... _Args>
1624 iterator
1625 _M_emplace_aux(const_iterator __position, _Args&&... __args);
1626
1627 // Emplacing an rvalue of the correct type can use _M_insert_rval.
1628 iterator
1629 _M_emplace_aux(const_iterator __position, value_type&& __v)
1630 { return _M_insert_rval(__position, std::move(__v)); }
1631#endif
1632
1633 // Called by _M_fill_insert, _M_insert_aux etc.
1634 size_type
1635 _M_check_len(size_type __n, const char* __s) const
1636 {
1637 if (max_size() - size() < __n)
1638 __throw_length_error(__N(__s));
1639
1640 const size_type __len = size() + std::max(size(), __n);
1641 return (__len < size() || __len > max_size()) ? max_size() : __len;
1642 }
1643
1644 // Internal erase functions follow.
1645
1646 // Called by erase(q1,q2), clear(), resize(), _M_fill_assign,
1647 // _M_assign_aux.
1648 void
1649 _M_erase_at_end(pointer __pos) _GLIBCXX_NOEXCEPT
1650 {
1651 if (size_type __n = this->_M_impl._M_finish - __pos)
1652 {
1653 std::_Destroy(__pos, this->_M_impl._M_finish,
1654 _M_get_Tp_allocator());
1655 this->_M_impl._M_finish = __pos;
1656 _GLIBCXX_ASAN_ANNOTATE_SHRINK(__n);
1657 }
1658 }
1659
1660 iterator
1661 _M_erase(iterator __position);
1662
1663 iterator
1664 _M_erase(iterator __first, iterator __last);
1665
1666#if __cplusplus >= 201103L
1667 private:
1668 // Constant-time move assignment when source object's memory can be
1669 // moved, either because the source's allocator will move too
1670 // or because the allocators are equal.
1671 void
1672 _M_move_assign(vector&& __x, std::true_type) noexcept
1673 {
1674 vector __tmp(get_allocator());
1675 this->_M_impl._M_swap_data(__tmp._M_impl);
1676 this->_M_impl._M_swap_data(__x._M_impl);
1677 std::__alloc_on_move(_M_get_Tp_allocator(), __x._M_get_Tp_allocator());
1678 }
1679
1680 // Do move assignment when it might not be possible to move source
1681 // object's memory, resulting in a linear-time operation.
1682 void
1683 _M_move_assign(vector&& __x, std::false_type)
1684 {
1685 if (__x._M_get_Tp_allocator() == this->_M_get_Tp_allocator())
1686 _M_move_assign(std::move(__x), std::true_type());
1687 else
1688 {
1689 // The rvalue's allocator cannot be moved and is not equal,
1690 // so we need to individually move each element.
1691 this->assign(std::__make_move_if_noexcept_iterator(__x.begin()),
1692 std::__make_move_if_noexcept_iterator(__x.end()));
1693 __x.clear();
1694 }
1695 }
1696#endif
1697
1698 template<typename _Up>
1699 _Up*
1700 _M_data_ptr(_Up* __ptr) const _GLIBCXX_NOEXCEPT
1701 { return __ptr; }
1702
1703#if __cplusplus >= 201103L
1704 template<typename _Ptr>
1705 typename std::pointer_traits<_Ptr>::element_type*
1706 _M_data_ptr(_Ptr __ptr) const
1707 { return empty() ? nullptr : std::__to_address(__ptr); }
1708#else
1709 template<typename _Up>
1710 _Up*
1711 _M_data_ptr(_Up* __ptr) _GLIBCXX_NOEXCEPT
1712 { return __ptr; }
1713
1714 template<typename _Ptr>
1715 value_type*
1716 _M_data_ptr(_Ptr __ptr)
1717 { return empty() ? (value_type*)0 : __ptr.operator->(); }
1718
1719 template<typename _Ptr>
1720 const value_type*
1721 _M_data_ptr(_Ptr __ptr) const
1722 { return empty() ? (const value_type*)0 : __ptr.operator->(); }
1723#endif
1724 };
1725
1726#if __cpp_deduction_guides >= 201606
1727 template<typename _InputIterator, typename _ValT
1728 = typename iterator_traits<_InputIterator>::value_type,
1729 typename _Allocator = allocator<_ValT>,
1730 typename = _RequireInputIter<_InputIterator>,
1731 typename = _RequireAllocator<_Allocator>>
1732 vector(_InputIterator, _InputIterator, _Allocator = _Allocator())
1733 -> vector<_ValT, _Allocator>;
1734#endif
1735
1736 /**
1737 * @brief Vector equality comparison.
1738 * @param __x A %vector.
1739 * @param __y A %vector of the same type as @a __x.
1740 * @return True iff the size and elements of the vectors are equal.
1741 *
1742 * This is an equivalence relation. It is linear in the size of the
1743 * vectors. Vectors are considered equivalent if their sizes are equal,
1744 * and if corresponding elements compare equal.
1745 */
1746 template<typename _Tp, typename _Alloc>
1747 inline bool
1748 operator==(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1749 { return (__x.size() == __y.size()
1750 && std::equal(__x.begin(), __x.end(), __y.begin())); }
1751
1752 /**
1753 * @brief Vector ordering relation.
1754 * @param __x A %vector.
1755 * @param __y A %vector of the same type as @a __x.
1756 * @return True iff @a __x is lexicographically less than @a __y.
1757 *
1758 * This is a total ordering relation. It is linear in the size of the
1759 * vectors. The elements must be comparable with @c <.
1760 *
1761 * See std::lexicographical_compare() for how the determination is made.
1762 */
1763 template<typename _Tp, typename _Alloc>
1764 inline bool
1765 operator<(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1766 { return std::lexicographical_compare(__x.begin(), __x.end(),
1767 __y.begin(), __y.end()); }
1768
1769 /// Based on operator==
1770 template<typename _Tp, typename _Alloc>
1771 inline bool
1772 operator!=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1773 { return !(__x == __y); }
1774
1775 /// Based on operator<
1776 template<typename _Tp, typename _Alloc>
1777 inline bool
1778 operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1779 { return __y < __x; }
1780
1781 /// Based on operator<
1782 template<typename _Tp, typename _Alloc>
1783 inline bool
1784 operator<=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1785 { return !(__y < __x); }
1786
1787 /// Based on operator<
1788 template<typename _Tp, typename _Alloc>
1789 inline bool
1790 operator>=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
1791 { return !(__x < __y); }
1792
1793 /// See std::vector::swap().
1794 template<typename _Tp, typename _Alloc>
1795 inline void
1796 swap(vector<_Tp, _Alloc>& __x, vector<_Tp, _Alloc>& __y)
1797 _GLIBCXX_NOEXCEPT_IF(noexcept(__x.swap(__y)))
1798 { __x.swap(__y); }
1799
1800_GLIBCXX_END_NAMESPACE_CONTAINER
1801_GLIBCXX_END_NAMESPACE_VERSION
1802} // namespace std
1803
1804#endif /* _STL_VECTOR_H */
1805