vector revision 262801
1// -*- C++ -*-
2//===------------------------------ vector --------------------------------===//
3//
4//                     The LLVM Compiler Infrastructure
5//
6// This file is dual licensed under the MIT and the University of Illinois Open
7// Source Licenses. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10
11#ifndef _LIBCPP_VECTOR
12#define _LIBCPP_VECTOR
13
14/*
15    vector synopsis
16
17namespace std
18{
19
20template <class T, class Allocator = allocator<T> >
21class vector
22{
23public:
24    typedef T                                        value_type;
25    typedef Allocator                                allocator_type;
26    typedef typename allocator_type::reference       reference;
27    typedef typename allocator_type::const_reference const_reference;
28    typedef implementation-defined                   iterator;
29    typedef implementation-defined                   const_iterator;
30    typedef typename allocator_type::size_type       size_type;
31    typedef typename allocator_type::difference_type difference_type;
32    typedef typename allocator_type::pointer         pointer;
33    typedef typename allocator_type::const_pointer   const_pointer;
34    typedef std::reverse_iterator<iterator>          reverse_iterator;
35    typedef std::reverse_iterator<const_iterator>    const_reverse_iterator;
36
37    vector()
38        noexcept(is_nothrow_default_constructible<allocator_type>::value);
39    explicit vector(const allocator_type&);
40    explicit vector(size_type n);
41    explicit vector(size_type n, const allocator_type&); // C++14
42    vector(size_type n, const value_type& value, const allocator_type& = allocator_type());
43    template <class InputIterator>
44        vector(InputIterator first, InputIterator last, const allocator_type& = allocator_type());
45    vector(const vector& x);
46    vector(vector&& x)
47        noexcept(is_nothrow_move_constructible<allocator_type>::value);
48    vector(initializer_list<value_type> il);
49    vector(initializer_list<value_type> il, const allocator_type& a);
50    ~vector();
51    vector& operator=(const vector& x);
52    vector& operator=(vector&& x)
53        noexcept(
54             allocator_type::propagate_on_container_move_assignment::value &&
55             is_nothrow_move_assignable<allocator_type>::value);
56    vector& operator=(initializer_list<value_type> il);
57    template <class InputIterator>
58        void assign(InputIterator first, InputIterator last);
59    void assign(size_type n, const value_type& u);
60    void assign(initializer_list<value_type> il);
61
62    allocator_type get_allocator() const noexcept;
63
64    iterator               begin() noexcept;
65    const_iterator         begin()   const noexcept;
66    iterator               end() noexcept;
67    const_iterator         end()     const noexcept;
68
69    reverse_iterator       rbegin() noexcept;
70    const_reverse_iterator rbegin()  const noexcept;
71    reverse_iterator       rend() noexcept;
72    const_reverse_iterator rend()    const noexcept;
73
74    const_iterator         cbegin()  const noexcept;
75    const_iterator         cend()    const noexcept;
76    const_reverse_iterator crbegin() const noexcept;
77    const_reverse_iterator crend()   const noexcept;
78
79    size_type size() const noexcept;
80    size_type max_size() const noexcept;
81    size_type capacity() const noexcept;
82    bool empty() const noexcept;
83    void reserve(size_type n);
84    void shrink_to_fit() noexcept;
85
86    reference       operator[](size_type n);
87    const_reference operator[](size_type n) const;
88    reference       at(size_type n);
89    const_reference at(size_type n) const;
90
91    reference       front();
92    const_reference front() const;
93    reference       back();
94    const_reference back() const;
95
96    value_type*       data() noexcept;
97    const value_type* data() const noexcept;
98
99    void push_back(const value_type& x);
100    void push_back(value_type&& x);
101    template <class... Args>
102        void emplace_back(Args&&... args);
103    void pop_back();
104
105    template <class... Args> iterator emplace(const_iterator position, Args&&... args);
106    iterator insert(const_iterator position, const value_type& x);
107    iterator insert(const_iterator position, value_type&& x);
108    iterator insert(const_iterator position, size_type n, const value_type& x);
109    template <class InputIterator>
110        iterator insert(const_iterator position, InputIterator first, InputIterator last);
111    iterator insert(const_iterator position, initializer_list<value_type> il);
112
113    iterator erase(const_iterator position);
114    iterator erase(const_iterator first, const_iterator last);
115
116    void clear() noexcept;
117
118    void resize(size_type sz);
119    void resize(size_type sz, const value_type& c);
120
121    void swap(vector&)
122        noexcept(!allocator_type::propagate_on_container_swap::value ||
123                 __is_nothrow_swappable<allocator_type>::value);
124
125    bool __invariants() const;
126};
127
128template <class Allocator = allocator<T> >
129class vector<bool, Allocator>
130{
131public:
132    typedef bool                                     value_type;
133    typedef Allocator                                allocator_type;
134    typedef implementation-defined                   iterator;
135    typedef implementation-defined                   const_iterator;
136    typedef typename allocator_type::size_type       size_type;
137    typedef typename allocator_type::difference_type difference_type;
138    typedef iterator                                 pointer;
139    typedef const_iterator                           const_pointer;
140    typedef std::reverse_iterator<iterator>          reverse_iterator;
141    typedef std::reverse_iterator<const_iterator>    const_reverse_iterator;
142
143    class reference
144    {
145    public:
146        reference(const reference&) noexcept;
147        operator bool() const noexcept;
148        reference& operator=(const bool x) noexcept;
149        reference& operator=(const reference& x) noexcept;
150        iterator operator&() const noexcept;
151        void flip() noexcept;
152    };
153
154    class const_reference
155    {
156    public:
157        const_reference(const reference&) noexcept;
158        operator bool() const noexcept;
159        const_iterator operator&() const noexcept;
160    };
161
162    vector()
163        noexcept(is_nothrow_default_constructible<allocator_type>::value);
164    explicit vector(const allocator_type&);
165    explicit vector(size_type n, const allocator_type& a = allocator_type()); // C++14
166    vector(size_type n, const value_type& value, const allocator_type& = allocator_type());
167    template <class InputIterator>
168        vector(InputIterator first, InputIterator last, const allocator_type& = allocator_type());
169    vector(const vector& x);
170    vector(vector&& x)
171        noexcept(is_nothrow_move_constructible<allocator_type>::value);
172    vector(initializer_list<value_type> il);
173    vector(initializer_list<value_type> il, const allocator_type& a);
174    ~vector();
175    vector& operator=(const vector& x);
176    vector& operator=(vector&& x)
177        noexcept(
178             allocator_type::propagate_on_container_move_assignment::value &&
179             is_nothrow_move_assignable<allocator_type>::value);
180    vector& operator=(initializer_list<value_type> il);
181    template <class InputIterator>
182        void assign(InputIterator first, InputIterator last);
183    void assign(size_type n, const value_type& u);
184    void assign(initializer_list<value_type> il);
185
186    allocator_type get_allocator() const noexcept;
187
188    iterator               begin() noexcept;
189    const_iterator         begin()   const noexcept;
190    iterator               end() noexcept;
191    const_iterator         end()     const noexcept;
192
193    reverse_iterator       rbegin() noexcept;
194    const_reverse_iterator rbegin()  const noexcept;
195    reverse_iterator       rend() noexcept;
196    const_reverse_iterator rend()    const noexcept;
197
198    const_iterator         cbegin()  const noexcept;
199    const_iterator         cend()    const noexcept;
200    const_reverse_iterator crbegin() const noexcept;
201    const_reverse_iterator crend()   const noexcept;
202
203    size_type size() const noexcept;
204    size_type max_size() const noexcept;
205    size_type capacity() const noexcept;
206    bool empty() const noexcept;
207    void reserve(size_type n);
208    void shrink_to_fit() noexcept;
209
210    reference       operator[](size_type n);
211    const_reference operator[](size_type n) const;
212    reference       at(size_type n);
213    const_reference at(size_type n) const;
214
215    reference       front();
216    const_reference front() const;
217    reference       back();
218    const_reference back() const;
219
220    void push_back(const value_type& x);
221    template <class... Args> void emplace_back(Args&&... args);  // C++14
222    void pop_back();
223
224    template <class... Args> iterator emplace(const_iterator position, Args&&... args);  // C++14
225    iterator insert(const_iterator position, const value_type& x);
226    iterator insert(const_iterator position, size_type n, const value_type& x);
227    template <class InputIterator>
228        iterator insert(const_iterator position, InputIterator first, InputIterator last);
229    iterator insert(const_iterator position, initializer_list<value_type> il);
230
231    iterator erase(const_iterator position);
232    iterator erase(const_iterator first, const_iterator last);
233
234    void clear() noexcept;
235
236    void resize(size_type sz);
237    void resize(size_type sz, value_type x);
238
239    void swap(vector&)
240        noexcept(!allocator_type::propagate_on_container_swap::value ||
241                 __is_nothrow_swappable<allocator_type>::value);
242    void flip() noexcept;
243
244    bool __invariants() const;
245};
246
247template <class Allocator> struct hash<std::vector<bool, Allocator>>;
248
249template <class T, class Allocator> bool operator==(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
250template <class T, class Allocator> bool operator< (const vector<T,Allocator>& x, const vector<T,Allocator>& y);
251template <class T, class Allocator> bool operator!=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
252template <class T, class Allocator> bool operator> (const vector<T,Allocator>& x, const vector<T,Allocator>& y);
253template <class T, class Allocator> bool operator>=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
254template <class T, class Allocator> bool operator<=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
255
256template <class T, class Allocator>
257void swap(vector<T,Allocator>& x, vector<T,Allocator>& y)
258    noexcept(noexcept(x.swap(y)));
259
260}  // std
261
262*/
263
264#include <__config>
265#include <__bit_reference>
266#include <type_traits>
267#include <climits>
268#include <limits>
269#include <initializer_list>
270#include <memory>
271#include <stdexcept>
272#include <algorithm>
273#include <cstring>
274#include <__split_buffer>
275#include <__functional_base>
276
277#include <__undef_min_max>
278
279#ifdef _LIBCPP_DEBUG
280#   include <__debug>
281#else
282#   define _LIBCPP_ASSERT(x, m) ((void)0)
283#endif
284
285#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
286#pragma GCC system_header
287#endif
288
289_LIBCPP_BEGIN_NAMESPACE_STD
290
291template <bool>
292class __vector_base_common
293{
294protected:
295    _LIBCPP_ALWAYS_INLINE __vector_base_common() {}
296    void __throw_length_error() const;
297    void __throw_out_of_range() const;
298};
299
300template <bool __b>
301void
302__vector_base_common<__b>::__throw_length_error() const
303{
304#ifndef _LIBCPP_NO_EXCEPTIONS
305    throw length_error("vector");
306#else
307    assert(!"vector length_error");
308#endif
309}
310
311template <bool __b>
312void
313__vector_base_common<__b>::__throw_out_of_range() const
314{
315#ifndef _LIBCPP_NO_EXCEPTIONS
316    throw out_of_range("vector");
317#else
318    assert(!"vector out_of_range");
319#endif
320}
321
322#ifdef _LIBCPP_MSVC
323#pragma warning( push )
324#pragma warning( disable: 4231 )
325#endif // _LIBCPP_MSVC
326_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS __vector_base_common<true>)
327#ifdef _LIBCPP_MSVC
328#pragma warning( pop )
329#endif // _LIBCPP_MSVC
330
331template <class _Tp, class _Allocator>
332class __vector_base
333    : protected __vector_base_common<true>
334{
335protected:
336    typedef _Tp                                      value_type;
337    typedef _Allocator                               allocator_type;
338    typedef allocator_traits<allocator_type>         __alloc_traits;
339    typedef value_type&                              reference;
340    typedef const value_type&                        const_reference;
341    typedef typename __alloc_traits::size_type       size_type;
342    typedef typename __alloc_traits::difference_type difference_type;
343    typedef typename __alloc_traits::pointer         pointer;
344    typedef typename __alloc_traits::const_pointer   const_pointer;
345    typedef pointer                                  iterator;
346    typedef const_pointer                            const_iterator;
347
348    pointer                                         __begin_;
349    pointer                                         __end_;
350    __compressed_pair<pointer, allocator_type> __end_cap_;
351
352    _LIBCPP_INLINE_VISIBILITY
353    allocator_type& __alloc() _NOEXCEPT
354        {return __end_cap_.second();}
355    _LIBCPP_INLINE_VISIBILITY
356    const allocator_type& __alloc() const _NOEXCEPT
357        {return __end_cap_.second();}
358    _LIBCPP_INLINE_VISIBILITY
359    pointer& __end_cap() _NOEXCEPT
360        {return __end_cap_.first();}
361    _LIBCPP_INLINE_VISIBILITY
362    const pointer& __end_cap() const _NOEXCEPT
363        {return __end_cap_.first();}
364
365    _LIBCPP_INLINE_VISIBILITY
366    __vector_base()
367        _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value);
368    _LIBCPP_INLINE_VISIBILITY __vector_base(const allocator_type& __a);
369    ~__vector_base();
370
371    _LIBCPP_INLINE_VISIBILITY
372    void clear() _NOEXCEPT {__destruct_at_end(__begin_);}
373    _LIBCPP_INLINE_VISIBILITY
374    size_type capacity() const _NOEXCEPT
375        {return static_cast<size_type>(__end_cap() - __begin_);}
376
377    _LIBCPP_INLINE_VISIBILITY
378    void __destruct_at_end(pointer __new_last) _NOEXCEPT;
379
380    _LIBCPP_INLINE_VISIBILITY
381    void __copy_assign_alloc(const __vector_base& __c)
382        {__copy_assign_alloc(__c, integral_constant<bool,
383                      __alloc_traits::propagate_on_container_copy_assignment::value>());}
384
385    _LIBCPP_INLINE_VISIBILITY
386    void __move_assign_alloc(__vector_base& __c)
387        _NOEXCEPT_(
388            !__alloc_traits::propagate_on_container_move_assignment::value ||
389            is_nothrow_move_assignable<allocator_type>::value)
390        {__move_assign_alloc(__c, integral_constant<bool,
391                      __alloc_traits::propagate_on_container_move_assignment::value>());}
392
393    _LIBCPP_INLINE_VISIBILITY
394    static void __swap_alloc(allocator_type& __x, allocator_type& __y)
395        _NOEXCEPT_(
396            !__alloc_traits::propagate_on_container_swap::value ||
397            __is_nothrow_swappable<allocator_type>::value)
398        {__swap_alloc(__x, __y, integral_constant<bool,
399                      __alloc_traits::propagate_on_container_swap::value>());}
400private:
401    _LIBCPP_INLINE_VISIBILITY
402    void __copy_assign_alloc(const __vector_base& __c, true_type)
403        {
404            if (__alloc() != __c.__alloc())
405            {
406                clear();
407                __alloc_traits::deallocate(__alloc(), __begin_, capacity());
408                __begin_ = __end_ = __end_cap() = nullptr;
409            }
410            __alloc() = __c.__alloc();
411        }
412
413    _LIBCPP_INLINE_VISIBILITY
414    void __copy_assign_alloc(const __vector_base&, false_type)
415        {}
416
417    _LIBCPP_INLINE_VISIBILITY
418    void __move_assign_alloc(__vector_base& __c, true_type)
419        _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
420        {
421            __alloc() = _VSTD::move(__c.__alloc());
422        }
423
424    _LIBCPP_INLINE_VISIBILITY
425    void __move_assign_alloc(__vector_base&, false_type)
426        _NOEXCEPT
427        {}
428
429    _LIBCPP_INLINE_VISIBILITY
430    static void __swap_alloc(allocator_type& __x, allocator_type& __y, true_type)
431        _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
432        {
433            using _VSTD::swap;
434            swap(__x, __y);
435        }
436    _LIBCPP_INLINE_VISIBILITY
437    static void __swap_alloc(allocator_type&, allocator_type&, false_type)
438        _NOEXCEPT
439        {}
440};
441
442template <class _Tp, class _Allocator>
443inline _LIBCPP_INLINE_VISIBILITY
444void
445__vector_base<_Tp, _Allocator>::__destruct_at_end(pointer __new_last) _NOEXCEPT
446{
447    while (__new_last != __end_)
448        __alloc_traits::destroy(__alloc(), _VSTD::__to_raw_pointer(--__end_));
449}
450
451template <class _Tp, class _Allocator>
452inline _LIBCPP_INLINE_VISIBILITY
453__vector_base<_Tp, _Allocator>::__vector_base()
454        _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
455    : __begin_(nullptr),
456      __end_(nullptr),
457      __end_cap_(nullptr)
458{
459}
460
461template <class _Tp, class _Allocator>
462inline _LIBCPP_INLINE_VISIBILITY
463__vector_base<_Tp, _Allocator>::__vector_base(const allocator_type& __a)
464    : __begin_(nullptr),
465      __end_(nullptr),
466      __end_cap_(nullptr, __a)
467{
468}
469
470template <class _Tp, class _Allocator>
471__vector_base<_Tp, _Allocator>::~__vector_base()
472{
473    if (__begin_ != nullptr)
474    {
475        clear();
476        __alloc_traits::deallocate(__alloc(), __begin_, capacity());
477    }
478}
479
480template <class _Tp, class _Allocator = allocator<_Tp> >
481class _LIBCPP_TYPE_VIS_ONLY vector
482    : private __vector_base<_Tp, _Allocator>
483{
484private:
485    typedef __vector_base<_Tp, _Allocator>           __base;
486public:
487    typedef vector                                   __self;
488    typedef _Tp                                      value_type;
489    typedef _Allocator                               allocator_type;
490    typedef typename __base::__alloc_traits          __alloc_traits;
491    typedef typename __base::reference               reference;
492    typedef typename __base::const_reference         const_reference;
493    typedef typename __base::size_type               size_type;
494    typedef typename __base::difference_type         difference_type;
495    typedef typename __base::pointer                 pointer;
496    typedef typename __base::const_pointer           const_pointer;
497    typedef __wrap_iter<pointer>                     iterator;
498    typedef __wrap_iter<const_pointer>               const_iterator;
499    typedef _VSTD::reverse_iterator<iterator>         reverse_iterator;
500    typedef _VSTD::reverse_iterator<const_iterator>   const_reverse_iterator;
501
502    static_assert((is_same<typename allocator_type::value_type, value_type>::value),
503                  "Allocator::value_type must be same type as value_type");
504
505    _LIBCPP_INLINE_VISIBILITY
506    vector()
507        _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
508        {
509#if _LIBCPP_DEBUG_LEVEL >= 2
510            __get_db()->__insert_c(this);
511#endif
512        }
513    _LIBCPP_INLINE_VISIBILITY explicit vector(const allocator_type& __a)
514        : __base(__a)
515    {
516#if _LIBCPP_DEBUG_LEVEL >= 2
517        __get_db()->__insert_c(this);
518#endif
519    }
520    explicit vector(size_type __n);
521#if _LIBCPP_STD_VER > 11
522    explicit vector(size_type __n, const allocator_type& __a);
523#endif
524    vector(size_type __n, const_reference __x);
525    vector(size_type __n, const_reference __x, const allocator_type& __a);
526    template <class _InputIterator>
527        vector(_InputIterator __first,
528               typename enable_if<__is_input_iterator  <_InputIterator>::value &&
529                                 !__is_forward_iterator<_InputIterator>::value &&
530                                 is_constructible<
531                                    value_type,
532                                    typename iterator_traits<_InputIterator>::reference>::value,
533                                 _InputIterator>::type __last);
534    template <class _InputIterator>
535        vector(_InputIterator __first, _InputIterator __last, const allocator_type& __a,
536               typename enable_if<__is_input_iterator  <_InputIterator>::value &&
537                                 !__is_forward_iterator<_InputIterator>::value &&
538                                 is_constructible<
539                                    value_type,
540                                    typename iterator_traits<_InputIterator>::reference>::value>::type* = 0);
541    template <class _ForwardIterator>
542        vector(_ForwardIterator __first,
543               typename enable_if<__is_forward_iterator<_ForwardIterator>::value &&
544                                 is_constructible<
545                                    value_type,
546                                    typename iterator_traits<_ForwardIterator>::reference>::value,
547                                 _ForwardIterator>::type __last);
548    template <class _ForwardIterator>
549        vector(_ForwardIterator __first, _ForwardIterator __last, const allocator_type& __a,
550               typename enable_if<__is_forward_iterator<_ForwardIterator>::value &&
551                                 is_constructible<
552                                    value_type,
553                                    typename iterator_traits<_ForwardIterator>::reference>::value>::type* = 0);
554#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
555    _LIBCPP_INLINE_VISIBILITY
556    vector(initializer_list<value_type> __il);
557    _LIBCPP_INLINE_VISIBILITY
558    vector(initializer_list<value_type> __il, const allocator_type& __a);
559#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
560#if _LIBCPP_DEBUG_LEVEL >= 2
561    _LIBCPP_INLINE_VISIBILITY
562    ~vector()
563    {
564        __get_db()->__erase_c(this);
565    }
566#endif
567
568    vector(const vector& __x);
569    vector(const vector& __x, const allocator_type& __a);
570    _LIBCPP_INLINE_VISIBILITY
571    vector& operator=(const vector& __x);
572#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
573    _LIBCPP_INLINE_VISIBILITY
574    vector(vector&& __x)
575        _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
576    _LIBCPP_INLINE_VISIBILITY
577    vector(vector&& __x, const allocator_type& __a);
578    _LIBCPP_INLINE_VISIBILITY
579    vector& operator=(vector&& __x)
580        _NOEXCEPT_(
581             __alloc_traits::propagate_on_container_move_assignment::value &&
582             is_nothrow_move_assignable<allocator_type>::value);
583#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
584#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
585    _LIBCPP_INLINE_VISIBILITY
586    vector& operator=(initializer_list<value_type> __il)
587        {assign(__il.begin(), __il.end()); return *this;}
588#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
589
590    template <class _InputIterator>
591        typename enable_if
592        <
593             __is_input_iterator  <_InputIterator>::value &&
594            !__is_forward_iterator<_InputIterator>::value &&
595            is_constructible<
596                 value_type,
597                 typename iterator_traits<_InputIterator>::reference>::value,
598            void
599        >::type
600        assign(_InputIterator __first, _InputIterator __last);
601    template <class _ForwardIterator>
602        typename enable_if
603        <
604            __is_forward_iterator<_ForwardIterator>::value &&
605            is_constructible<
606                 value_type,
607                 typename iterator_traits<_ForwardIterator>::reference>::value,
608            void
609        >::type
610        assign(_ForwardIterator __first, _ForwardIterator __last);
611
612    void assign(size_type __n, const_reference __u);
613#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
614    _LIBCPP_INLINE_VISIBILITY
615    void assign(initializer_list<value_type> __il)
616        {assign(__il.begin(), __il.end());}
617#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
618
619    _LIBCPP_INLINE_VISIBILITY
620    allocator_type get_allocator() const _NOEXCEPT
621        {return this->__alloc();}
622
623    _LIBCPP_INLINE_VISIBILITY iterator               begin() _NOEXCEPT;
624    _LIBCPP_INLINE_VISIBILITY const_iterator         begin()   const _NOEXCEPT;
625    _LIBCPP_INLINE_VISIBILITY iterator               end() _NOEXCEPT;
626    _LIBCPP_INLINE_VISIBILITY const_iterator         end()     const _NOEXCEPT;
627
628    _LIBCPP_INLINE_VISIBILITY
629    reverse_iterator       rbegin() _NOEXCEPT
630        {return       reverse_iterator(end());}
631    _LIBCPP_INLINE_VISIBILITY
632    const_reverse_iterator rbegin()  const _NOEXCEPT
633        {return const_reverse_iterator(end());}
634    _LIBCPP_INLINE_VISIBILITY
635    reverse_iterator       rend() _NOEXCEPT
636        {return       reverse_iterator(begin());}
637    _LIBCPP_INLINE_VISIBILITY
638    const_reverse_iterator rend()    const _NOEXCEPT
639        {return const_reverse_iterator(begin());}
640
641    _LIBCPP_INLINE_VISIBILITY
642    const_iterator         cbegin()  const _NOEXCEPT
643        {return begin();}
644    _LIBCPP_INLINE_VISIBILITY
645    const_iterator         cend()    const _NOEXCEPT
646        {return end();}
647    _LIBCPP_INLINE_VISIBILITY
648    const_reverse_iterator crbegin() const _NOEXCEPT
649        {return rbegin();}
650    _LIBCPP_INLINE_VISIBILITY
651    const_reverse_iterator crend()   const _NOEXCEPT
652        {return rend();}
653
654    _LIBCPP_INLINE_VISIBILITY
655    size_type size() const _NOEXCEPT
656        {return static_cast<size_type>(this->__end_ - this->__begin_);}
657    _LIBCPP_INLINE_VISIBILITY
658    size_type capacity() const _NOEXCEPT
659        {return __base::capacity();}
660    _LIBCPP_INLINE_VISIBILITY
661    bool empty() const _NOEXCEPT
662        {return this->__begin_ == this->__end_;}
663    size_type max_size() const _NOEXCEPT;
664    void reserve(size_type __n);
665    void shrink_to_fit() _NOEXCEPT;
666
667    _LIBCPP_INLINE_VISIBILITY reference       operator[](size_type __n);
668    _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __n) const;
669    reference       at(size_type __n);
670    const_reference at(size_type __n) const;
671
672    _LIBCPP_INLINE_VISIBILITY reference       front()
673    {
674        _LIBCPP_ASSERT(!empty(), "front() called for empty vector");
675        return *this->__begin_;
676    }
677    _LIBCPP_INLINE_VISIBILITY const_reference front() const
678    {
679        _LIBCPP_ASSERT(!empty(), "front() called for empty vector");
680        return *this->__begin_;
681    }
682    _LIBCPP_INLINE_VISIBILITY reference       back()
683    {
684        _LIBCPP_ASSERT(!empty(), "back() called for empty vector");
685        return *(this->__end_ - 1);
686    }
687    _LIBCPP_INLINE_VISIBILITY const_reference back()  const
688    {
689        _LIBCPP_ASSERT(!empty(), "back() called for empty vector");
690        return *(this->__end_ - 1);
691    }
692
693    _LIBCPP_INLINE_VISIBILITY
694    value_type*       data() _NOEXCEPT
695        {return _VSTD::__to_raw_pointer(this->__begin_);}
696    _LIBCPP_INLINE_VISIBILITY
697    const value_type* data() const _NOEXCEPT
698        {return _VSTD::__to_raw_pointer(this->__begin_);}
699
700    _LIBCPP_INLINE_VISIBILITY void push_back(const_reference __x);
701#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
702    _LIBCPP_INLINE_VISIBILITY void push_back(value_type&& __x);
703#ifndef _LIBCPP_HAS_NO_VARIADICS
704    template <class... _Args>
705        void emplace_back(_Args&&... __args);
706#endif  // _LIBCPP_HAS_NO_VARIADICS
707#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
708    void pop_back();
709
710    iterator insert(const_iterator __position, const_reference __x);
711#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
712    iterator insert(const_iterator __position, value_type&& __x);
713#ifndef _LIBCPP_HAS_NO_VARIADICS
714    template <class... _Args>
715        iterator emplace(const_iterator __position, _Args&&... __args);
716#endif  // _LIBCPP_HAS_NO_VARIADICS
717#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
718    iterator insert(const_iterator __position, size_type __n, const_reference __x);
719    template <class _InputIterator>
720        typename enable_if
721        <
722             __is_input_iterator  <_InputIterator>::value &&
723            !__is_forward_iterator<_InputIterator>::value &&
724            is_constructible<
725                 value_type,
726                 typename iterator_traits<_InputIterator>::reference>::value,
727            iterator
728        >::type
729        insert(const_iterator __position, _InputIterator __first, _InputIterator __last);
730    template <class _ForwardIterator>
731        typename enable_if
732        <
733            __is_forward_iterator<_ForwardIterator>::value &&
734            is_constructible<
735                 value_type,
736                 typename iterator_traits<_ForwardIterator>::reference>::value,
737            iterator
738        >::type
739        insert(const_iterator __position, _ForwardIterator __first, _ForwardIterator __last);
740#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
741    _LIBCPP_INLINE_VISIBILITY
742    iterator insert(const_iterator __position, initializer_list<value_type> __il)
743        {return insert(__position, __il.begin(), __il.end());}
744#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
745
746    _LIBCPP_INLINE_VISIBILITY iterator erase(const_iterator __position);
747    iterator erase(const_iterator __first, const_iterator __last);
748
749    _LIBCPP_INLINE_VISIBILITY
750    void clear() _NOEXCEPT
751    {
752        __base::clear();
753        __invalidate_all_iterators();
754    }
755
756    void resize(size_type __sz);
757    void resize(size_type __sz, const_reference __x);
758
759    void swap(vector&)
760        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
761                   __is_nothrow_swappable<allocator_type>::value);
762
763    bool __invariants() const;
764
765#if _LIBCPP_DEBUG_LEVEL >= 2
766
767    bool __dereferenceable(const const_iterator* __i) const;
768    bool __decrementable(const const_iterator* __i) const;
769    bool __addable(const const_iterator* __i, ptrdiff_t __n) const;
770    bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const;
771
772#endif  // _LIBCPP_DEBUG_LEVEL >= 2
773
774private:
775    _LIBCPP_INLINE_VISIBILITY void __invalidate_all_iterators();
776    void allocate(size_type __n);
777    void deallocate() _NOEXCEPT;
778    _LIBCPP_INLINE_VISIBILITY size_type __recommend(size_type __new_size) const;
779    void __construct_at_end(size_type __n);
780    void __construct_at_end(size_type __n, const_reference __x);
781    template <class _ForwardIterator>
782        typename enable_if
783        <
784            __is_forward_iterator<_ForwardIterator>::value,
785            void
786        >::type
787        __construct_at_end(_ForwardIterator __first, _ForwardIterator __last);
788    void __move_construct_at_end(pointer __first, pointer __last);
789    void __append(size_type __n);
790    void __append(size_type __n, const_reference __x);
791    _LIBCPP_INLINE_VISIBILITY
792    iterator       __make_iter(pointer __p) _NOEXCEPT;
793    _LIBCPP_INLINE_VISIBILITY
794    const_iterator __make_iter(const_pointer __p) const _NOEXCEPT;
795    void __swap_out_circular_buffer(__split_buffer<value_type, allocator_type&>& __v);
796    pointer __swap_out_circular_buffer(__split_buffer<value_type, allocator_type&>& __v, pointer __p);
797    void __move_range(pointer __from_s, pointer __from_e, pointer __to);
798    void __move_assign(vector& __c, true_type)
799        _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value);
800    void __move_assign(vector& __c, false_type);
801    _LIBCPP_INLINE_VISIBILITY
802    void __destruct_at_end(pointer __new_last) _NOEXCEPT
803    {
804#if _LIBCPP_DEBUG_LEVEL >= 2
805        __c_node* __c = __get_db()->__find_c_and_lock(this);
806        for (__i_node** __p = __c->end_; __p != __c->beg_; )
807        {
808            --__p;
809            const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_);
810            if (__i->base() > __new_last)
811            {
812                (*__p)->__c_ = nullptr;
813                if (--__c->end_ != __p)
814                    memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
815            }
816        }
817        __get_db()->unlock();
818#endif
819        __base::__destruct_at_end(__new_last);
820    }
821    template <class _Up>
822        void
823#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
824        __push_back_slow_path(_Up&& __x);
825#else
826        __push_back_slow_path(_Up& __x);
827#endif
828#if !defined(_LIBCPP_HAS_NO_VARIADICS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
829    template <class... _Args>
830        void
831        __emplace_back_slow_path(_Args&&... __args);
832#endif
833};
834
835template <class _Tp, class _Allocator>
836void
837vector<_Tp, _Allocator>::__swap_out_circular_buffer(__split_buffer<value_type, allocator_type&>& __v)
838{
839    __alloc_traits::__construct_backward(this->__alloc(), this->__begin_, this->__end_, __v.__begin_);
840    _VSTD::swap(this->__begin_, __v.__begin_);
841    _VSTD::swap(this->__end_, __v.__end_);
842    _VSTD::swap(this->__end_cap(), __v.__end_cap());
843    __v.__first_ = __v.__begin_;
844    __invalidate_all_iterators();
845}
846
847template <class _Tp, class _Allocator>
848typename vector<_Tp, _Allocator>::pointer
849vector<_Tp, _Allocator>::__swap_out_circular_buffer(__split_buffer<value_type, allocator_type&>& __v, pointer __p)
850{
851    pointer __r = __v.__begin_;
852    __alloc_traits::__construct_backward(this->__alloc(), this->__begin_, __p, __v.__begin_);
853    __alloc_traits::__construct_forward(this->__alloc(), __p, this->__end_, __v.__end_);
854    _VSTD::swap(this->__begin_, __v.__begin_);
855    _VSTD::swap(this->__end_, __v.__end_);
856    _VSTD::swap(this->__end_cap(), __v.__end_cap());
857    __v.__first_ = __v.__begin_;
858    __invalidate_all_iterators();
859    return __r;
860}
861
862//  Allocate space for __n objects
863//  throws length_error if __n > max_size()
864//  throws (probably bad_alloc) if memory run out
865//  Precondition:  __begin_ == __end_ == __end_cap() == 0
866//  Precondition:  __n > 0
867//  Postcondition:  capacity() == __n
868//  Postcondition:  size() == 0
869template <class _Tp, class _Allocator>
870void
871vector<_Tp, _Allocator>::allocate(size_type __n)
872{
873    if (__n > max_size())
874        this->__throw_length_error();
875    this->__begin_ = this->__end_ = __alloc_traits::allocate(this->__alloc(), __n);
876    this->__end_cap() = this->__begin_ + __n;
877}
878
879template <class _Tp, class _Allocator>
880void
881vector<_Tp, _Allocator>::deallocate() _NOEXCEPT
882{
883    if (this->__begin_ != nullptr)
884    {
885        clear();
886        __alloc_traits::deallocate(this->__alloc(), this->__begin_, capacity());
887        this->__begin_ = this->__end_ = this->__end_cap() = nullptr;
888    }
889}
890
891template <class _Tp, class _Allocator>
892typename vector<_Tp, _Allocator>::size_type
893vector<_Tp, _Allocator>::max_size() const _NOEXCEPT
894{
895    return _VSTD::min<size_type>(__alloc_traits::max_size(this->__alloc()), numeric_limits<size_type>::max() / 2);  // end() >= begin(), always
896}
897
898//  Precondition:  __new_size > capacity()
899template <class _Tp, class _Allocator>
900inline _LIBCPP_INLINE_VISIBILITY
901typename vector<_Tp, _Allocator>::size_type
902vector<_Tp, _Allocator>::__recommend(size_type __new_size) const
903{
904    const size_type __ms = max_size();
905    if (__new_size > __ms)
906        this->__throw_length_error();
907    const size_type __cap = capacity();
908    if (__cap >= __ms / 2)
909        return __ms;
910    return _VSTD::max<size_type>(2*__cap, __new_size);
911}
912
913//  Default constructs __n objects starting at __end_
914//  throws if construction throws
915//  Precondition:  __n > 0
916//  Precondition:  size() + __n <= capacity()
917//  Postcondition:  size() == size() + __n
918template <class _Tp, class _Allocator>
919void
920vector<_Tp, _Allocator>::__construct_at_end(size_type __n)
921{
922    allocator_type& __a = this->__alloc();
923    do
924    {
925        __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(this->__end_));
926        ++this->__end_;
927        --__n;
928    } while (__n > 0);
929}
930
931//  Copy constructs __n objects starting at __end_ from __x
932//  throws if construction throws
933//  Precondition:  __n > 0
934//  Precondition:  size() + __n <= capacity()
935//  Postcondition:  size() == old size() + __n
936//  Postcondition:  [i] == __x for all i in [size() - __n, __n)
937template <class _Tp, class _Allocator>
938inline _LIBCPP_INLINE_VISIBILITY
939void
940vector<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x)
941{
942    allocator_type& __a = this->__alloc();
943    do
944    {
945        __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(this->__end_), __x);
946        ++this->__end_;
947        --__n;
948    } while (__n > 0);
949}
950
951template <class _Tp, class _Allocator>
952template <class _ForwardIterator>
953typename enable_if
954<
955    __is_forward_iterator<_ForwardIterator>::value,
956    void
957>::type
958vector<_Tp, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last)
959{
960    allocator_type& __a = this->__alloc();
961    for (; __first != __last; ++__first)
962    {
963        __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(this->__end_), *__first);
964        ++this->__end_;
965    }
966}
967
968template <class _Tp, class _Allocator>
969void
970vector<_Tp, _Allocator>::__move_construct_at_end(pointer __first, pointer __last)
971{
972    allocator_type& __a = this->__alloc();
973    for (; __first != __last; ++__first)
974    {
975        __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(this->__end_),
976                                  _VSTD::move(*__first));
977        ++this->__end_;
978    }
979}
980
981//  Default constructs __n objects starting at __end_
982//  throws if construction throws
983//  Postcondition:  size() == size() + __n
984//  Exception safety: strong.
985template <class _Tp, class _Allocator>
986void
987vector<_Tp, _Allocator>::__append(size_type __n)
988{
989    if (static_cast<size_type>(this->__end_cap() - this->__end_) >= __n)
990        this->__construct_at_end(__n);
991    else
992    {
993        allocator_type& __a = this->__alloc();
994        __split_buffer<value_type, allocator_type&> __v(__recommend(size() + __n), size(), __a);
995        __v.__construct_at_end(__n);
996        __swap_out_circular_buffer(__v);
997    }
998}
999
1000//  Default constructs __n objects starting at __end_
1001//  throws if construction throws
1002//  Postcondition:  size() == size() + __n
1003//  Exception safety: strong.
1004template <class _Tp, class _Allocator>
1005void
1006vector<_Tp, _Allocator>::__append(size_type __n, const_reference __x)
1007{
1008    if (static_cast<size_type>(this->__end_cap() - this->__end_) >= __n)
1009        this->__construct_at_end(__n, __x);
1010    else
1011    {
1012        allocator_type& __a = this->__alloc();
1013        __split_buffer<value_type, allocator_type&> __v(__recommend(size() + __n), size(), __a);
1014        __v.__construct_at_end(__n, __x);
1015        __swap_out_circular_buffer(__v);
1016    }
1017}
1018
1019template <class _Tp, class _Allocator>
1020vector<_Tp, _Allocator>::vector(size_type __n)
1021{
1022#if _LIBCPP_DEBUG_LEVEL >= 2
1023    __get_db()->__insert_c(this);
1024#endif
1025    if (__n > 0)
1026    {
1027        allocate(__n);
1028        __construct_at_end(__n);
1029    }
1030}
1031
1032#if _LIBCPP_STD_VER > 11
1033template <class _Tp, class _Allocator>
1034vector<_Tp, _Allocator>::vector(size_type __n, const allocator_type& __a)
1035    : __base(__a)
1036{
1037#if _LIBCPP_DEBUG_LEVEL >= 2
1038    __get_db()->__insert_c(this);
1039#endif
1040    if (__n > 0)
1041    {
1042        allocate(__n);
1043        __construct_at_end(__n);
1044    }
1045}
1046#endif
1047
1048template <class _Tp, class _Allocator>
1049vector<_Tp, _Allocator>::vector(size_type __n, const_reference __x)
1050{
1051#if _LIBCPP_DEBUG_LEVEL >= 2
1052    __get_db()->__insert_c(this);
1053#endif
1054    if (__n > 0)
1055    {
1056        allocate(__n);
1057        __construct_at_end(__n, __x);
1058    }
1059}
1060
1061template <class _Tp, class _Allocator>
1062vector<_Tp, _Allocator>::vector(size_type __n, const_reference __x, const allocator_type& __a)
1063    : __base(__a)
1064{
1065#if _LIBCPP_DEBUG_LEVEL >= 2
1066    __get_db()->__insert_c(this);
1067#endif
1068    if (__n > 0)
1069    {
1070        allocate(__n);
1071        __construct_at_end(__n, __x);
1072    }
1073}
1074
1075template <class _Tp, class _Allocator>
1076template <class _InputIterator>
1077vector<_Tp, _Allocator>::vector(_InputIterator __first,
1078       typename enable_if<__is_input_iterator  <_InputIterator>::value &&
1079                         !__is_forward_iterator<_InputIterator>::value &&
1080                         is_constructible<
1081                            value_type,
1082                            typename iterator_traits<_InputIterator>::reference>::value,
1083                          _InputIterator>::type __last)
1084{
1085#if _LIBCPP_DEBUG_LEVEL >= 2
1086    __get_db()->__insert_c(this);
1087#endif
1088    for (; __first != __last; ++__first)
1089        push_back(*__first);
1090}
1091
1092template <class _Tp, class _Allocator>
1093template <class _InputIterator>
1094vector<_Tp, _Allocator>::vector(_InputIterator __first, _InputIterator __last, const allocator_type& __a,
1095       typename enable_if<__is_input_iterator  <_InputIterator>::value &&
1096                         !__is_forward_iterator<_InputIterator>::value &&
1097                         is_constructible<
1098                            value_type,
1099                            typename iterator_traits<_InputIterator>::reference>::value>::type*)
1100    : __base(__a)
1101{
1102#if _LIBCPP_DEBUG_LEVEL >= 2
1103    __get_db()->__insert_c(this);
1104#endif
1105    for (; __first != __last; ++__first)
1106        push_back(*__first);
1107}
1108
1109template <class _Tp, class _Allocator>
1110template <class _ForwardIterator>
1111vector<_Tp, _Allocator>::vector(_ForwardIterator __first,
1112                                typename enable_if<__is_forward_iterator<_ForwardIterator>::value &&
1113                                is_constructible<
1114                                   value_type,
1115                                   typename iterator_traits<_ForwardIterator>::reference>::value,
1116                                                   _ForwardIterator>::type __last)
1117{
1118#if _LIBCPP_DEBUG_LEVEL >= 2
1119    __get_db()->__insert_c(this);
1120#endif
1121    size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last));
1122    if (__n > 0)
1123    {
1124        allocate(__n);
1125        __construct_at_end(__first, __last);
1126    }
1127}
1128
1129template <class _Tp, class _Allocator>
1130template <class _ForwardIterator>
1131vector<_Tp, _Allocator>::vector(_ForwardIterator __first, _ForwardIterator __last, const allocator_type& __a,
1132                                typename enable_if<__is_forward_iterator<_ForwardIterator>::value &&
1133                                is_constructible<
1134                                   value_type,
1135                                   typename iterator_traits<_ForwardIterator>::reference>::value>::type*)
1136    : __base(__a)
1137{
1138#if _LIBCPP_DEBUG_LEVEL >= 2
1139    __get_db()->__insert_c(this);
1140#endif
1141    size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last));
1142    if (__n > 0)
1143    {
1144        allocate(__n);
1145        __construct_at_end(__first, __last);
1146    }
1147}
1148
1149template <class _Tp, class _Allocator>
1150vector<_Tp, _Allocator>::vector(const vector& __x)
1151    : __base(__alloc_traits::select_on_container_copy_construction(__x.__alloc()))
1152{
1153#if _LIBCPP_DEBUG_LEVEL >= 2
1154    __get_db()->__insert_c(this);
1155#endif
1156    size_type __n = __x.size();
1157    if (__n > 0)
1158    {
1159        allocate(__n);
1160        __construct_at_end(__x.__begin_, __x.__end_);
1161    }
1162}
1163
1164template <class _Tp, class _Allocator>
1165vector<_Tp, _Allocator>::vector(const vector& __x, const allocator_type& __a)
1166    : __base(__a)
1167{
1168#if _LIBCPP_DEBUG_LEVEL >= 2
1169    __get_db()->__insert_c(this);
1170#endif
1171    size_type __n = __x.size();
1172    if (__n > 0)
1173    {
1174        allocate(__n);
1175        __construct_at_end(__x.__begin_, __x.__end_);
1176    }
1177}
1178
1179#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1180
1181template <class _Tp, class _Allocator>
1182inline _LIBCPP_INLINE_VISIBILITY
1183vector<_Tp, _Allocator>::vector(vector&& __x)
1184        _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
1185    : __base(_VSTD::move(__x.__alloc()))
1186{
1187#if _LIBCPP_DEBUG_LEVEL >= 2
1188    __get_db()->__insert_c(this);
1189    __get_db()->swap(this, &__x);
1190#endif
1191    this->__begin_ = __x.__begin_;
1192    this->__end_ = __x.__end_;
1193    this->__end_cap() = __x.__end_cap();
1194    __x.__begin_ = __x.__end_ = __x.__end_cap() = nullptr;
1195}
1196
1197template <class _Tp, class _Allocator>
1198inline _LIBCPP_INLINE_VISIBILITY
1199vector<_Tp, _Allocator>::vector(vector&& __x, const allocator_type& __a)
1200    : __base(__a)
1201{
1202#if _LIBCPP_DEBUG_LEVEL >= 2
1203    __get_db()->__insert_c(this);
1204#endif
1205    if (__a == __x.__alloc())
1206    {
1207        this->__begin_ = __x.__begin_;
1208        this->__end_ = __x.__end_;
1209        this->__end_cap() = __x.__end_cap();
1210        __x.__begin_ = __x.__end_ = __x.__end_cap() = nullptr;
1211#if _LIBCPP_DEBUG_LEVEL >= 2
1212        __get_db()->swap(this, &__x);
1213#endif
1214    }
1215    else
1216    {
1217        typedef move_iterator<iterator> _Ip;
1218        assign(_Ip(__x.begin()), _Ip(__x.end()));
1219    }
1220}
1221
1222#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1223
1224template <class _Tp, class _Allocator>
1225inline _LIBCPP_INLINE_VISIBILITY
1226vector<_Tp, _Allocator>::vector(initializer_list<value_type> __il)
1227{
1228#if _LIBCPP_DEBUG_LEVEL >= 2
1229    __get_db()->__insert_c(this);
1230#endif
1231    if (__il.size() > 0)
1232    {
1233        allocate(__il.size());
1234        __construct_at_end(__il.begin(), __il.end());
1235    }
1236}
1237
1238template <class _Tp, class _Allocator>
1239inline _LIBCPP_INLINE_VISIBILITY
1240vector<_Tp, _Allocator>::vector(initializer_list<value_type> __il, const allocator_type& __a)
1241    : __base(__a)
1242{
1243#if _LIBCPP_DEBUG_LEVEL >= 2
1244    __get_db()->__insert_c(this);
1245#endif
1246    if (__il.size() > 0)
1247    {
1248        allocate(__il.size());
1249        __construct_at_end(__il.begin(), __il.end());
1250    }
1251}
1252
1253#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1254
1255template <class _Tp, class _Allocator>
1256inline _LIBCPP_INLINE_VISIBILITY
1257vector<_Tp, _Allocator>&
1258vector<_Tp, _Allocator>::operator=(vector&& __x)
1259        _NOEXCEPT_(
1260             __alloc_traits::propagate_on_container_move_assignment::value &&
1261             is_nothrow_move_assignable<allocator_type>::value)
1262{
1263    __move_assign(__x, integral_constant<bool,
1264          __alloc_traits::propagate_on_container_move_assignment::value>());
1265    return *this;
1266}
1267
1268template <class _Tp, class _Allocator>
1269void
1270vector<_Tp, _Allocator>::__move_assign(vector& __c, false_type)
1271{
1272    if (__base::__alloc() != __c.__alloc())
1273    {
1274        typedef move_iterator<iterator> _Ip;
1275        assign(_Ip(__c.begin()), _Ip(__c.end()));
1276    }
1277    else
1278        __move_assign(__c, true_type());
1279}
1280
1281template <class _Tp, class _Allocator>
1282void
1283vector<_Tp, _Allocator>::__move_assign(vector& __c, true_type)
1284    _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
1285{
1286    deallocate();
1287    this->__begin_ = __c.__begin_;
1288    this->__end_ = __c.__end_;
1289    this->__end_cap() = __c.__end_cap();
1290    __base::__move_assign_alloc(__c);
1291    __c.__begin_ = __c.__end_ = __c.__end_cap() = nullptr;
1292#if _LIBCPP_DEBUG_LEVEL >= 2
1293    __get_db()->swap(this, &__c);
1294#endif
1295}
1296
1297#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1298
1299template <class _Tp, class _Allocator>
1300inline _LIBCPP_INLINE_VISIBILITY
1301vector<_Tp, _Allocator>&
1302vector<_Tp, _Allocator>::operator=(const vector& __x)
1303{
1304    if (this != &__x)
1305    {
1306        __base::__copy_assign_alloc(__x);
1307        assign(__x.__begin_, __x.__end_);
1308    }
1309    return *this;
1310}
1311
1312template <class _Tp, class _Allocator>
1313template <class _InputIterator>
1314typename enable_if
1315<
1316     __is_input_iterator  <_InputIterator>::value &&
1317    !__is_forward_iterator<_InputIterator>::value &&
1318    is_constructible<
1319       _Tp,
1320       typename iterator_traits<_InputIterator>::reference>::value,
1321    void
1322>::type
1323vector<_Tp, _Allocator>::assign(_InputIterator __first, _InputIterator __last)
1324{
1325    clear();
1326    for (; __first != __last; ++__first)
1327        push_back(*__first);
1328}
1329
1330template <class _Tp, class _Allocator>
1331template <class _ForwardIterator>
1332typename enable_if
1333<
1334    __is_forward_iterator<_ForwardIterator>::value &&
1335    is_constructible<
1336       _Tp,
1337       typename iterator_traits<_ForwardIterator>::reference>::value,
1338    void
1339>::type
1340vector<_Tp, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last)
1341{
1342    typename iterator_traits<_ForwardIterator>::difference_type __new_size = _VSTD::distance(__first, __last);
1343    if (static_cast<size_type>(__new_size) <= capacity())
1344    {
1345        _ForwardIterator __mid = __last;
1346        bool __growing = false;
1347        if (static_cast<size_type>(__new_size) > size())
1348        {
1349            __growing = true;
1350            __mid =  __first;
1351            _VSTD::advance(__mid, size());
1352        }
1353        pointer __m = _VSTD::copy(__first, __mid, this->__begin_);
1354        if (__growing)
1355            __construct_at_end(__mid, __last);
1356        else
1357            this->__destruct_at_end(__m);
1358    }
1359    else
1360    {
1361        deallocate();
1362        allocate(__recommend(static_cast<size_type>(__new_size)));
1363        __construct_at_end(__first, __last);
1364    }
1365}
1366
1367template <class _Tp, class _Allocator>
1368void
1369vector<_Tp, _Allocator>::assign(size_type __n, const_reference __u)
1370{
1371    if (__n <= capacity())
1372    {
1373        size_type __s = size();
1374        _VSTD::fill_n(this->__begin_, _VSTD::min(__n, __s), __u);
1375        if (__n > __s)
1376            __construct_at_end(__n - __s, __u);
1377        else
1378            this->__destruct_at_end(this->__begin_ + __n);
1379    }
1380    else
1381    {
1382        deallocate();
1383        allocate(__recommend(static_cast<size_type>(__n)));
1384        __construct_at_end(__n, __u);
1385    }
1386}
1387
1388template <class _Tp, class _Allocator>
1389inline _LIBCPP_INLINE_VISIBILITY
1390typename vector<_Tp, _Allocator>::iterator
1391vector<_Tp, _Allocator>::__make_iter(pointer __p) _NOEXCEPT
1392{
1393#if _LIBCPP_DEBUG_LEVEL >= 2
1394    return iterator(this, __p);
1395#else
1396    return iterator(__p);
1397#endif
1398}
1399
1400template <class _Tp, class _Allocator>
1401inline _LIBCPP_INLINE_VISIBILITY
1402typename vector<_Tp, _Allocator>::const_iterator
1403vector<_Tp, _Allocator>::__make_iter(const_pointer __p) const _NOEXCEPT
1404{
1405#if _LIBCPP_DEBUG_LEVEL >= 2
1406    return const_iterator(this, __p);
1407#else
1408    return const_iterator(__p);
1409#endif
1410}
1411
1412template <class _Tp, class _Allocator>
1413inline _LIBCPP_INLINE_VISIBILITY
1414typename vector<_Tp, _Allocator>::iterator
1415vector<_Tp, _Allocator>::begin() _NOEXCEPT
1416{
1417    return __make_iter(this->__begin_);
1418}
1419
1420template <class _Tp, class _Allocator>
1421inline _LIBCPP_INLINE_VISIBILITY
1422typename vector<_Tp, _Allocator>::const_iterator
1423vector<_Tp, _Allocator>::begin() const _NOEXCEPT
1424{
1425    return __make_iter(this->__begin_);
1426}
1427
1428template <class _Tp, class _Allocator>
1429inline _LIBCPP_INLINE_VISIBILITY
1430typename vector<_Tp, _Allocator>::iterator
1431vector<_Tp, _Allocator>::end() _NOEXCEPT
1432{
1433    return __make_iter(this->__end_);
1434}
1435
1436template <class _Tp, class _Allocator>
1437inline _LIBCPP_INLINE_VISIBILITY
1438typename vector<_Tp, _Allocator>::const_iterator
1439vector<_Tp, _Allocator>::end() const _NOEXCEPT
1440{
1441    return __make_iter(this->__end_);
1442}
1443
1444template <class _Tp, class _Allocator>
1445inline _LIBCPP_INLINE_VISIBILITY
1446typename vector<_Tp, _Allocator>::reference
1447vector<_Tp, _Allocator>::operator[](size_type __n)
1448{
1449    _LIBCPP_ASSERT(__n < size(), "vector[] index out of bounds");
1450    return this->__begin_[__n];
1451}
1452
1453template <class _Tp, class _Allocator>
1454inline _LIBCPP_INLINE_VISIBILITY
1455typename vector<_Tp, _Allocator>::const_reference
1456vector<_Tp, _Allocator>::operator[](size_type __n) const
1457{
1458    _LIBCPP_ASSERT(__n < size(), "vector[] index out of bounds");
1459    return this->__begin_[__n];
1460}
1461
1462template <class _Tp, class _Allocator>
1463typename vector<_Tp, _Allocator>::reference
1464vector<_Tp, _Allocator>::at(size_type __n)
1465{
1466    if (__n >= size())
1467        this->__throw_out_of_range();
1468    return this->__begin_[__n];
1469}
1470
1471template <class _Tp, class _Allocator>
1472typename vector<_Tp, _Allocator>::const_reference
1473vector<_Tp, _Allocator>::at(size_type __n) const
1474{
1475    if (__n >= size())
1476        this->__throw_out_of_range();
1477    return this->__begin_[__n];
1478}
1479
1480template <class _Tp, class _Allocator>
1481void
1482vector<_Tp, _Allocator>::reserve(size_type __n)
1483{
1484    if (__n > capacity())
1485    {
1486        allocator_type& __a = this->__alloc();
1487        __split_buffer<value_type, allocator_type&> __v(__n, size(), __a);
1488        __swap_out_circular_buffer(__v);
1489    }
1490}
1491
1492template <class _Tp, class _Allocator>
1493void
1494vector<_Tp, _Allocator>::shrink_to_fit() _NOEXCEPT
1495{
1496    if (capacity() > size())
1497    {
1498#ifndef _LIBCPP_NO_EXCEPTIONS
1499        try
1500        {
1501#endif  // _LIBCPP_NO_EXCEPTIONS
1502            allocator_type& __a = this->__alloc();
1503            __split_buffer<value_type, allocator_type&> __v(size(), size(), __a);
1504            __swap_out_circular_buffer(__v);
1505#ifndef _LIBCPP_NO_EXCEPTIONS
1506        }
1507        catch (...)
1508        {
1509        }
1510#endif  // _LIBCPP_NO_EXCEPTIONS
1511    }
1512}
1513
1514template <class _Tp, class _Allocator>
1515template <class _Up>
1516void
1517#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1518vector<_Tp, _Allocator>::__push_back_slow_path(_Up&& __x)
1519#else
1520vector<_Tp, _Allocator>::__push_back_slow_path(_Up& __x)
1521#endif
1522{
1523    allocator_type& __a = this->__alloc();
1524    __split_buffer<value_type, allocator_type&> __v(__recommend(size() + 1), size(), __a);
1525    // __v.push_back(_VSTD::forward<_Up>(__x));
1526    __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(__v.__end_), _VSTD::forward<_Up>(__x));
1527    __v.__end_++;
1528    __swap_out_circular_buffer(__v);
1529}
1530
1531template <class _Tp, class _Allocator>
1532inline _LIBCPP_INLINE_VISIBILITY
1533void
1534vector<_Tp, _Allocator>::push_back(const_reference __x)
1535{
1536    if (this->__end_ != this->__end_cap())
1537    {
1538        __alloc_traits::construct(this->__alloc(),
1539                                  _VSTD::__to_raw_pointer(this->__end_), __x);
1540        ++this->__end_;
1541    }
1542    else
1543        __push_back_slow_path(__x);
1544}
1545
1546#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1547
1548template <class _Tp, class _Allocator>
1549inline _LIBCPP_INLINE_VISIBILITY
1550void
1551vector<_Tp, _Allocator>::push_back(value_type&& __x)
1552{
1553    if (this->__end_ < this->__end_cap())
1554    {
1555        __alloc_traits::construct(this->__alloc(),
1556                                  _VSTD::__to_raw_pointer(this->__end_),
1557                                  _VSTD::move(__x));
1558        ++this->__end_;
1559    }
1560    else
1561        __push_back_slow_path(_VSTD::move(__x));
1562}
1563
1564#ifndef _LIBCPP_HAS_NO_VARIADICS
1565
1566template <class _Tp, class _Allocator>
1567template <class... _Args>
1568void
1569vector<_Tp, _Allocator>::__emplace_back_slow_path(_Args&&... __args)
1570{
1571    allocator_type& __a = this->__alloc();
1572    __split_buffer<value_type, allocator_type&> __v(__recommend(size() + 1), size(), __a);
1573//    __v.emplace_back(_VSTD::forward<_Args>(__args)...);
1574    __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(__v.__end_), _VSTD::forward<_Args>(__args)...);
1575    __v.__end_++;
1576    __swap_out_circular_buffer(__v);
1577}
1578
1579template <class _Tp, class _Allocator>
1580template <class... _Args>
1581inline _LIBCPP_INLINE_VISIBILITY
1582void
1583vector<_Tp, _Allocator>::emplace_back(_Args&&... __args)
1584{
1585    if (this->__end_ < this->__end_cap())
1586    {
1587        __alloc_traits::construct(this->__alloc(),
1588                                  _VSTD::__to_raw_pointer(this->__end_),
1589                                  _VSTD::forward<_Args>(__args)...);
1590        ++this->__end_;
1591    }
1592    else
1593        __emplace_back_slow_path(_VSTD::forward<_Args>(__args)...);
1594}
1595
1596#endif  // _LIBCPP_HAS_NO_VARIADICS
1597#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1598
1599template <class _Tp, class _Allocator>
1600inline _LIBCPP_INLINE_VISIBILITY
1601void
1602vector<_Tp, _Allocator>::pop_back()
1603{
1604    _LIBCPP_ASSERT(!empty(), "vector::pop_back called for empty vector");
1605    this->__destruct_at_end(this->__end_ - 1);
1606}
1607
1608template <class _Tp, class _Allocator>
1609inline _LIBCPP_INLINE_VISIBILITY
1610typename vector<_Tp, _Allocator>::iterator
1611vector<_Tp, _Allocator>::erase(const_iterator __position)
1612{
1613#if _LIBCPP_DEBUG_LEVEL >= 2
1614    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1615        "vector::erase(iterator) called with an iterator not"
1616        " referring to this vector");
1617#endif
1618    _LIBCPP_ASSERT(__position != end(),
1619        "vector::erase(iterator) called with a non-dereferenceable iterator");
1620    difference_type __ps = __position - cbegin();
1621    pointer __p = this->__begin_ + __ps;
1622    iterator __r = __make_iter(__p);
1623    this->__destruct_at_end(_VSTD::move(__p + 1, this->__end_, __p));
1624    return __r;
1625}
1626
1627template <class _Tp, class _Allocator>
1628typename vector<_Tp, _Allocator>::iterator
1629vector<_Tp, _Allocator>::erase(const_iterator __first, const_iterator __last)
1630{
1631#if _LIBCPP_DEBUG_LEVEL >= 2
1632    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this,
1633        "vector::erase(iterator,  iterator) called with an iterator not"
1634        " referring to this vector");
1635#endif
1636    _LIBCPP_ASSERT(__first <= __last, "vector::erase(first, last) called with invalid range");
1637    pointer __p = this->__begin_ + (__first - begin());
1638    iterator __r = __make_iter(__p);
1639    if (__first != __last)
1640        this->__destruct_at_end(_VSTD::move(__p + (__last - __first), this->__end_, __p));
1641    return __r;
1642}
1643
1644template <class _Tp, class _Allocator>
1645void
1646vector<_Tp, _Allocator>::__move_range(pointer __from_s, pointer __from_e, pointer __to)
1647{
1648    pointer __old_last = this->__end_;
1649    difference_type __n = __old_last - __to;
1650    for (pointer __i = __from_s + __n; __i < __from_e; ++__i, ++this->__end_)
1651        __alloc_traits::construct(this->__alloc(),
1652                                  _VSTD::__to_raw_pointer(this->__end_),
1653                                  _VSTD::move(*__i));
1654    _VSTD::move_backward(__from_s, __from_s + __n, __old_last);
1655}
1656
1657template <class _Tp, class _Allocator>
1658typename vector<_Tp, _Allocator>::iterator
1659vector<_Tp, _Allocator>::insert(const_iterator __position, const_reference __x)
1660{
1661#if _LIBCPP_DEBUG_LEVEL >= 2
1662    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1663        "vector::insert(iterator, x) called with an iterator not"
1664        " referring to this vector");
1665#endif
1666    pointer __p = this->__begin_ + (__position - begin());
1667    if (this->__end_ < this->__end_cap())
1668    {
1669        if (__p == this->__end_)
1670        {
1671            __alloc_traits::construct(this->__alloc(),
1672                                      _VSTD::__to_raw_pointer(this->__end_), __x);
1673            ++this->__end_;
1674        }
1675        else
1676        {
1677            __move_range(__p, this->__end_, __p + 1);
1678            const_pointer __xr = pointer_traits<const_pointer>::pointer_to(__x);
1679            if (__p <= __xr && __xr < this->__end_)
1680                ++__xr;
1681            *__p = *__xr;
1682        }
1683    }
1684    else
1685    {
1686        allocator_type& __a = this->__alloc();
1687        __split_buffer<value_type, allocator_type&> __v(__recommend(size() + 1), __p - this->__begin_, __a);
1688        __v.push_back(__x);
1689        __p = __swap_out_circular_buffer(__v, __p);
1690    }
1691    return __make_iter(__p);
1692}
1693
1694#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1695
1696template <class _Tp, class _Allocator>
1697typename vector<_Tp, _Allocator>::iterator
1698vector<_Tp, _Allocator>::insert(const_iterator __position, value_type&& __x)
1699{
1700#if _LIBCPP_DEBUG_LEVEL >= 2
1701    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1702        "vector::insert(iterator, x) called with an iterator not"
1703        " referring to this vector");
1704#endif
1705    pointer __p = this->__begin_ + (__position - begin());
1706    if (this->__end_ < this->__end_cap())
1707    {
1708        if (__p == this->__end_)
1709        {
1710            __alloc_traits::construct(this->__alloc(),
1711                                      _VSTD::__to_raw_pointer(this->__end_),
1712                                      _VSTD::move(__x));
1713            ++this->__end_;
1714        }
1715        else
1716        {
1717            __move_range(__p, this->__end_, __p + 1);
1718            *__p = _VSTD::move(__x);
1719        }
1720    }
1721    else
1722    {
1723        allocator_type& __a = this->__alloc();
1724        __split_buffer<value_type, allocator_type&> __v(__recommend(size() + 1), __p - this->__begin_, __a);
1725        __v.push_back(_VSTD::move(__x));
1726        __p = __swap_out_circular_buffer(__v, __p);
1727    }
1728    return __make_iter(__p);
1729}
1730
1731#ifndef _LIBCPP_HAS_NO_VARIADICS
1732
1733template <class _Tp, class _Allocator>
1734template <class... _Args>
1735typename vector<_Tp, _Allocator>::iterator
1736vector<_Tp, _Allocator>::emplace(const_iterator __position, _Args&&... __args)
1737{
1738#if _LIBCPP_DEBUG_LEVEL >= 2
1739    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1740        "vector::emplace(iterator, x) called with an iterator not"
1741        " referring to this vector");
1742#endif
1743    pointer __p = this->__begin_ + (__position - begin());
1744    if (this->__end_ < this->__end_cap())
1745    {
1746        if (__p == this->__end_)
1747        {
1748            __alloc_traits::construct(this->__alloc(),
1749                                      _VSTD::__to_raw_pointer(this->__end_),
1750                                      _VSTD::forward<_Args>(__args)...);
1751            ++this->__end_;
1752        }
1753        else
1754        {
1755            value_type __tmp(_VSTD::forward<_Args>(__args)...);
1756            __move_range(__p, this->__end_, __p + 1);
1757            *__p = _VSTD::move(__tmp);
1758        }
1759    }
1760    else
1761    {
1762        allocator_type& __a = this->__alloc();
1763        __split_buffer<value_type, allocator_type&> __v(__recommend(size() + 1), __p - this->__begin_, __a);
1764        __v.emplace_back(_VSTD::forward<_Args>(__args)...);
1765        __p = __swap_out_circular_buffer(__v, __p);
1766    }
1767    return __make_iter(__p);
1768}
1769
1770#endif  // _LIBCPP_HAS_NO_VARIADICS
1771#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1772
1773template <class _Tp, class _Allocator>
1774typename vector<_Tp, _Allocator>::iterator
1775vector<_Tp, _Allocator>::insert(const_iterator __position, size_type __n, const_reference __x)
1776{
1777#if _LIBCPP_DEBUG_LEVEL >= 2
1778    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1779        "vector::insert(iterator, n, x) called with an iterator not"
1780        " referring to this vector");
1781#endif
1782    pointer __p = this->__begin_ + (__position - begin());
1783    if (__n > 0)
1784    {
1785        if (__n <= static_cast<size_type>(this->__end_cap() - this->__end_))
1786        {
1787            size_type __old_n = __n;
1788            pointer __old_last = this->__end_;
1789            if (__n > static_cast<size_type>(this->__end_ - __p))
1790            {
1791                size_type __cx = __n - (this->__end_ - __p);
1792                __construct_at_end(__cx, __x);
1793                __n -= __cx;
1794            }
1795            if (__n > 0)
1796            {
1797                __move_range(__p, __old_last, __p + __old_n);
1798                const_pointer __xr = pointer_traits<const_pointer>::pointer_to(__x);
1799                if (__p <= __xr && __xr < this->__end_)
1800                    __xr += __old_n;
1801                _VSTD::fill_n(__p, __n, *__xr);
1802            }
1803        }
1804        else
1805        {
1806            allocator_type& __a = this->__alloc();
1807            __split_buffer<value_type, allocator_type&> __v(__recommend(size() + __n), __p - this->__begin_, __a);
1808            __v.__construct_at_end(__n, __x);
1809            __p = __swap_out_circular_buffer(__v, __p);
1810        }
1811    }
1812    return __make_iter(__p);
1813}
1814
1815template <class _Tp, class _Allocator>
1816template <class _InputIterator>
1817typename enable_if
1818<
1819     __is_input_iterator  <_InputIterator>::value &&
1820    !__is_forward_iterator<_InputIterator>::value &&
1821    is_constructible<
1822       _Tp,
1823       typename iterator_traits<_InputIterator>::reference>::value,
1824    typename vector<_Tp, _Allocator>::iterator
1825>::type
1826vector<_Tp, _Allocator>::insert(const_iterator __position, _InputIterator __first, _InputIterator __last)
1827{
1828#if _LIBCPP_DEBUG_LEVEL >= 2
1829    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1830        "vector::insert(iterator, range) called with an iterator not"
1831        " referring to this vector");
1832#endif
1833    difference_type __off = __position - begin();
1834    pointer __p = this->__begin_ + __off;
1835    allocator_type& __a = this->__alloc();
1836    pointer __old_last = this->__end_;
1837    for (; this->__end_ != this->__end_cap() && __first != __last; ++__first)
1838    {
1839        __alloc_traits::construct(__a, _VSTD::__to_raw_pointer(this->__end_),
1840                                  *__first);
1841        ++this->__end_;
1842    }
1843    __split_buffer<value_type, allocator_type&> __v(__a);
1844    if (__first != __last)
1845    {
1846#ifndef _LIBCPP_NO_EXCEPTIONS
1847        try
1848        {
1849#endif  // _LIBCPP_NO_EXCEPTIONS
1850            __v.__construct_at_end(__first, __last);
1851            difference_type __old_size = __old_last - this->__begin_;
1852            difference_type __old_p = __p - this->__begin_;
1853            reserve(__recommend(size() + __v.size()));
1854            __p = this->__begin_ + __old_p;
1855            __old_last = this->__begin_ + __old_size;
1856#ifndef _LIBCPP_NO_EXCEPTIONS
1857        }
1858        catch (...)
1859        {
1860            erase(__make_iter(__old_last), end());
1861            throw;
1862        }
1863#endif  // _LIBCPP_NO_EXCEPTIONS
1864    }
1865    __p = _VSTD::rotate(__p, __old_last, this->__end_);
1866    insert(__make_iter(__p), make_move_iterator(__v.begin()),
1867                                    make_move_iterator(__v.end()));
1868    return begin() + __off;
1869}
1870
1871template <class _Tp, class _Allocator>
1872template <class _ForwardIterator>
1873typename enable_if
1874<
1875    __is_forward_iterator<_ForwardIterator>::value &&
1876    is_constructible<
1877       _Tp,
1878       typename iterator_traits<_ForwardIterator>::reference>::value,
1879    typename vector<_Tp, _Allocator>::iterator
1880>::type
1881vector<_Tp, _Allocator>::insert(const_iterator __position, _ForwardIterator __first, _ForwardIterator __last)
1882{
1883#if _LIBCPP_DEBUG_LEVEL >= 2
1884    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__position) == this,
1885        "vector::insert(iterator, range) called with an iterator not"
1886        " referring to this vector");
1887#endif
1888    pointer __p = this->__begin_ + (__position - begin());
1889    difference_type __n = _VSTD::distance(__first, __last);
1890    if (__n > 0)
1891    {
1892        if (__n <= this->__end_cap() - this->__end_)
1893        {
1894            size_type __old_n = __n;
1895            pointer __old_last = this->__end_;
1896            _ForwardIterator __m = __last;
1897            difference_type __dx = this->__end_ - __p;
1898            if (__n > __dx)
1899            {
1900                __m = __first;
1901                _VSTD::advance(__m, this->__end_ - __p);
1902                __construct_at_end(__m, __last);
1903                __n = __dx;
1904            }
1905            if (__n > 0)
1906            {
1907                __move_range(__p, __old_last, __p + __old_n);
1908                _VSTD::copy(__first, __m, __p);
1909            }
1910        }
1911        else
1912        {
1913            allocator_type& __a = this->__alloc();
1914            __split_buffer<value_type, allocator_type&> __v(__recommend(size() + __n), __p - this->__begin_, __a);
1915            __v.__construct_at_end(__first, __last);
1916            __p = __swap_out_circular_buffer(__v, __p);
1917        }
1918    }
1919    return __make_iter(__p);
1920}
1921
1922template <class _Tp, class _Allocator>
1923void
1924vector<_Tp, _Allocator>::resize(size_type __sz)
1925{
1926    size_type __cs = size();
1927    if (__cs < __sz)
1928        this->__append(__sz - __cs);
1929    else if (__cs > __sz)
1930        this->__destruct_at_end(this->__begin_ + __sz);
1931}
1932
1933template <class _Tp, class _Allocator>
1934void
1935vector<_Tp, _Allocator>::resize(size_type __sz, const_reference __x)
1936{
1937    size_type __cs = size();
1938    if (__cs < __sz)
1939        this->__append(__sz - __cs, __x);
1940    else if (__cs > __sz)
1941        this->__destruct_at_end(this->__begin_ + __sz);
1942}
1943
1944template <class _Tp, class _Allocator>
1945void
1946vector<_Tp, _Allocator>::swap(vector& __x)
1947        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
1948                   __is_nothrow_swappable<allocator_type>::value)
1949{
1950    _LIBCPP_ASSERT(__alloc_traits::propagate_on_container_swap::value ||
1951                   this->__alloc() == __x.__alloc(),
1952                   "vector::swap: Either propagate_on_container_swap must be true"
1953                   " or the allocators must compare equal");
1954    _VSTD::swap(this->__begin_, __x.__begin_);
1955    _VSTD::swap(this->__end_, __x.__end_);
1956    _VSTD::swap(this->__end_cap(), __x.__end_cap());
1957    __base::__swap_alloc(this->__alloc(), __x.__alloc());
1958#if _LIBCPP_DEBUG_LEVEL >= 2
1959    __get_db()->swap(this, &__x);
1960#endif  // _LIBCPP_DEBUG_LEVEL >= 2
1961}
1962
1963template <class _Tp, class _Allocator>
1964bool
1965vector<_Tp, _Allocator>::__invariants() const
1966{
1967    if (this->__begin_ == nullptr)
1968    {
1969        if (this->__end_ != nullptr || this->__end_cap() != nullptr)
1970            return false;
1971    }
1972    else
1973    {
1974        if (this->__begin_ > this->__end_)
1975            return false;
1976        if (this->__begin_ == this->__end_cap())
1977            return false;
1978        if (this->__end_ > this->__end_cap())
1979            return false;
1980    }
1981    return true;
1982}
1983
1984#if _LIBCPP_DEBUG_LEVEL >= 2
1985
1986template <class _Tp, class _Allocator>
1987bool
1988vector<_Tp, _Allocator>::__dereferenceable(const const_iterator* __i) const
1989{
1990    return this->__begin_ <= __i->base() && __i->base() < this->__end_;
1991}
1992
1993template <class _Tp, class _Allocator>
1994bool
1995vector<_Tp, _Allocator>::__decrementable(const const_iterator* __i) const
1996{
1997    return this->__begin_ < __i->base() && __i->base() <= this->__end_;
1998}
1999
2000template <class _Tp, class _Allocator>
2001bool
2002vector<_Tp, _Allocator>::__addable(const const_iterator* __i, ptrdiff_t __n) const
2003{
2004    const_pointer __p = __i->base() + __n;
2005    return this->__begin_ <= __p && __p <= this->__end_;
2006}
2007
2008template <class _Tp, class _Allocator>
2009bool
2010vector<_Tp, _Allocator>::__subscriptable(const const_iterator* __i, ptrdiff_t __n) const
2011{
2012    const_pointer __p = __i->base() + __n;
2013    return this->__begin_ <= __p && __p < this->__end_;
2014}
2015
2016#endif  // _LIBCPP_DEBUG_LEVEL >= 2
2017
2018template <class _Tp, class _Allocator>
2019inline _LIBCPP_INLINE_VISIBILITY
2020void
2021vector<_Tp, _Allocator>::__invalidate_all_iterators()
2022{
2023#if _LIBCPP_DEBUG_LEVEL >= 2
2024    __get_db()->__invalidate_all(this);
2025#endif  // _LIBCPP_DEBUG_LEVEL >= 2
2026}
2027
2028// vector<bool>
2029
2030template <class _Allocator> class vector<bool, _Allocator>;
2031
2032template <class _Allocator> struct hash<vector<bool, _Allocator> >;
2033
2034template <class _Allocator>
2035struct __has_storage_type<vector<bool, _Allocator> >
2036{
2037    static const bool value = true;
2038};
2039
2040template <class _Allocator>
2041class _LIBCPP_TYPE_VIS_ONLY vector<bool, _Allocator>
2042    : private __vector_base_common<true>
2043{
2044public:
2045    typedef vector                                   __self;
2046    typedef bool                                     value_type;
2047    typedef _Allocator                               allocator_type;
2048    typedef allocator_traits<allocator_type>         __alloc_traits;
2049    typedef typename __alloc_traits::size_type       size_type;
2050    typedef typename __alloc_traits::difference_type difference_type;
2051    typedef size_type __storage_type;
2052    typedef __bit_iterator<vector, false>            pointer;
2053    typedef __bit_iterator<vector, true>             const_pointer;
2054    typedef pointer                                  iterator;
2055    typedef const_pointer                            const_iterator;
2056    typedef _VSTD::reverse_iterator<iterator>         reverse_iterator;
2057    typedef _VSTD::reverse_iterator<const_iterator>   const_reverse_iterator;
2058
2059private:
2060    typedef typename __alloc_traits::template
2061#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
2062                rebind_alloc<__storage_type>
2063#else
2064                rebind_alloc<__storage_type>::other
2065#endif
2066                                                     __storage_allocator;
2067    typedef allocator_traits<__storage_allocator>    __storage_traits;
2068    typedef typename __storage_traits::pointer       __storage_pointer;
2069    typedef typename __storage_traits::const_pointer __const_storage_pointer;
2070
2071    __storage_pointer                                      __begin_;
2072    size_type                                              __size_;
2073    __compressed_pair<size_type, __storage_allocator> __cap_alloc_;
2074public:
2075    typedef __bit_reference<vector>                  reference;
2076    typedef __bit_const_reference<vector>            const_reference;
2077private:
2078    _LIBCPP_INLINE_VISIBILITY
2079    size_type& __cap() _NOEXCEPT
2080        {return __cap_alloc_.first();}
2081    _LIBCPP_INLINE_VISIBILITY
2082    const size_type& __cap() const _NOEXCEPT
2083        {return __cap_alloc_.first();}
2084    _LIBCPP_INLINE_VISIBILITY
2085    __storage_allocator& __alloc() _NOEXCEPT
2086        {return __cap_alloc_.second();}
2087    _LIBCPP_INLINE_VISIBILITY
2088    const __storage_allocator& __alloc() const _NOEXCEPT
2089        {return __cap_alloc_.second();}
2090
2091    static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
2092
2093    _LIBCPP_INLINE_VISIBILITY
2094    static size_type __internal_cap_to_external(size_type __n) _NOEXCEPT
2095        {return __n * __bits_per_word;}
2096    _LIBCPP_INLINE_VISIBILITY
2097    static size_type __external_cap_to_internal(size_type __n) _NOEXCEPT
2098        {return (__n - 1) / __bits_per_word + 1;}
2099
2100public:
2101    _LIBCPP_INLINE_VISIBILITY
2102    vector()
2103        _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value);
2104    _LIBCPP_INLINE_VISIBILITY explicit vector(const allocator_type& __a);
2105    ~vector();
2106    explicit vector(size_type __n);
2107#if _LIBCPP_STD_VER > 11
2108    explicit vector(size_type __n, const allocator_type& __a);
2109#endif
2110    vector(size_type __n, const value_type& __v);
2111    vector(size_type __n, const value_type& __v, const allocator_type& __a);
2112    template <class _InputIterator>
2113        vector(_InputIterator __first, _InputIterator __last,
2114               typename enable_if<__is_input_iterator  <_InputIterator>::value &&
2115                                 !__is_forward_iterator<_InputIterator>::value>::type* = 0);
2116    template <class _InputIterator>
2117        vector(_InputIterator __first, _InputIterator __last, const allocator_type& __a,
2118               typename enable_if<__is_input_iterator  <_InputIterator>::value &&
2119                                 !__is_forward_iterator<_InputIterator>::value>::type* = 0);
2120    template <class _ForwardIterator>
2121        vector(_ForwardIterator __first, _ForwardIterator __last,
2122               typename enable_if<__is_forward_iterator<_ForwardIterator>::value>::type* = 0);
2123    template <class _ForwardIterator>
2124        vector(_ForwardIterator __first, _ForwardIterator __last, const allocator_type& __a,
2125               typename enable_if<__is_forward_iterator<_ForwardIterator>::value>::type* = 0);
2126
2127    vector(const vector& __v);
2128    vector(const vector& __v, const allocator_type& __a);
2129    vector& operator=(const vector& __v);
2130#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2131    vector(initializer_list<value_type> __il);
2132    vector(initializer_list<value_type> __il, const allocator_type& __a);
2133#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2134
2135#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
2136    _LIBCPP_INLINE_VISIBILITY
2137    vector(vector&& __v)
2138        _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
2139    vector(vector&& __v, const allocator_type& __a);
2140    _LIBCPP_INLINE_VISIBILITY
2141    vector& operator=(vector&& __v)
2142        _NOEXCEPT_(
2143             __alloc_traits::propagate_on_container_move_assignment::value &&
2144             is_nothrow_move_assignable<allocator_type>::value);
2145#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
2146#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2147    _LIBCPP_INLINE_VISIBILITY
2148    vector& operator=(initializer_list<value_type> __il)
2149        {assign(__il.begin(), __il.end()); return *this;}
2150#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2151
2152    template <class _InputIterator>
2153        typename enable_if
2154        <
2155            __is_input_iterator<_InputIterator>::value &&
2156           !__is_forward_iterator<_InputIterator>::value,
2157           void
2158        >::type
2159        assign(_InputIterator __first, _InputIterator __last);
2160    template <class _ForwardIterator>
2161        typename enable_if
2162        <
2163            __is_forward_iterator<_ForwardIterator>::value,
2164           void
2165        >::type
2166        assign(_ForwardIterator __first, _ForwardIterator __last);
2167
2168    void assign(size_type __n, const value_type& __x);
2169#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2170    _LIBCPP_INLINE_VISIBILITY
2171    void assign(initializer_list<value_type> __il)
2172        {assign(__il.begin(), __il.end());}
2173#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2174
2175    _LIBCPP_INLINE_VISIBILITY allocator_type get_allocator() const _NOEXCEPT
2176        {return allocator_type(this->__alloc());}
2177
2178    size_type max_size() const _NOEXCEPT;
2179    _LIBCPP_INLINE_VISIBILITY
2180    size_type capacity() const _NOEXCEPT
2181        {return __internal_cap_to_external(__cap());}
2182    _LIBCPP_INLINE_VISIBILITY
2183    size_type size() const _NOEXCEPT
2184        {return __size_;}
2185    _LIBCPP_INLINE_VISIBILITY
2186    bool empty() const _NOEXCEPT
2187        {return __size_ == 0;}
2188    void reserve(size_type __n);
2189    void shrink_to_fit() _NOEXCEPT;
2190
2191    _LIBCPP_INLINE_VISIBILITY
2192    iterator begin() _NOEXCEPT
2193        {return __make_iter(0);}
2194    _LIBCPP_INLINE_VISIBILITY
2195    const_iterator begin() const _NOEXCEPT
2196        {return __make_iter(0);}
2197    _LIBCPP_INLINE_VISIBILITY
2198    iterator end() _NOEXCEPT
2199        {return __make_iter(__size_);}
2200    _LIBCPP_INLINE_VISIBILITY
2201    const_iterator end()   const _NOEXCEPT
2202        {return __make_iter(__size_);}
2203
2204    _LIBCPP_INLINE_VISIBILITY
2205    reverse_iterator rbegin() _NOEXCEPT
2206        {return       reverse_iterator(end());}
2207    _LIBCPP_INLINE_VISIBILITY
2208    const_reverse_iterator rbegin() const _NOEXCEPT
2209        {return const_reverse_iterator(end());}
2210    _LIBCPP_INLINE_VISIBILITY
2211    reverse_iterator rend() _NOEXCEPT
2212        {return       reverse_iterator(begin());}
2213    _LIBCPP_INLINE_VISIBILITY
2214    const_reverse_iterator rend()   const _NOEXCEPT
2215        {return const_reverse_iterator(begin());}
2216
2217    _LIBCPP_INLINE_VISIBILITY
2218    const_iterator         cbegin()  const _NOEXCEPT
2219        {return __make_iter(0);}
2220    _LIBCPP_INLINE_VISIBILITY
2221    const_iterator         cend()    const _NOEXCEPT
2222        {return __make_iter(__size_);}
2223    _LIBCPP_INLINE_VISIBILITY
2224    const_reverse_iterator crbegin() const _NOEXCEPT
2225        {return rbegin();}
2226    _LIBCPP_INLINE_VISIBILITY
2227    const_reverse_iterator crend()   const _NOEXCEPT
2228        {return rend();}
2229
2230    _LIBCPP_INLINE_VISIBILITY reference       operator[](size_type __n)       {return __make_ref(__n);}
2231    _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __n) const {return __make_ref(__n);}
2232    reference       at(size_type __n);
2233    const_reference at(size_type __n) const;
2234
2235    _LIBCPP_INLINE_VISIBILITY reference       front()       {return __make_ref(0);}
2236    _LIBCPP_INLINE_VISIBILITY const_reference front() const {return __make_ref(0);}
2237    _LIBCPP_INLINE_VISIBILITY reference       back()        {return __make_ref(__size_ - 1);}
2238    _LIBCPP_INLINE_VISIBILITY const_reference back()  const {return __make_ref(__size_ - 1);}
2239
2240    void push_back(const value_type& __x);
2241#if _LIBCPP_STD_VER > 11
2242    template <class... _Args>
2243    _LIBCPP_INLINE_VISIBILITY void emplace_back(_Args&&... __args)
2244        { push_back ( value_type ( _VSTD::forward<_Args>(__args)... )); }
2245#endif
2246
2247    _LIBCPP_INLINE_VISIBILITY void pop_back() {--__size_;}
2248
2249#if _LIBCPP_STD_VER > 11
2250    template <class... _Args>
2251   _LIBCPP_INLINE_VISIBILITY iterator emplace(const_iterator position, _Args&&... __args)
2252        { return insert ( position, value_type ( _VSTD::forward<_Args>(__args)... )); }
2253#endif
2254
2255    iterator insert(const_iterator __position, const value_type& __x);
2256    iterator insert(const_iterator __position, size_type __n, const value_type& __x);
2257    iterator insert(const_iterator __position, size_type __n, const_reference __x);
2258    template <class _InputIterator>
2259        typename enable_if
2260        <
2261             __is_input_iterator  <_InputIterator>::value &&
2262            !__is_forward_iterator<_InputIterator>::value,
2263            iterator
2264        >::type
2265        insert(const_iterator __position, _InputIterator __first, _InputIterator __last);
2266    template <class _ForwardIterator>
2267        typename enable_if
2268        <
2269            __is_forward_iterator<_ForwardIterator>::value,
2270            iterator
2271        >::type
2272        insert(const_iterator __position, _ForwardIterator __first, _ForwardIterator __last);
2273#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2274    _LIBCPP_INLINE_VISIBILITY
2275    iterator insert(const_iterator __position, initializer_list<value_type> __il)
2276        {return insert(__position, __il.begin(), __il.end());}
2277#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2278
2279    _LIBCPP_INLINE_VISIBILITY iterator erase(const_iterator __position);
2280    iterator erase(const_iterator __first, const_iterator __last);
2281
2282    _LIBCPP_INLINE_VISIBILITY
2283    void clear() _NOEXCEPT {__size_ = 0;}
2284
2285    void swap(vector&)
2286        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
2287                   __is_nothrow_swappable<allocator_type>::value);
2288
2289    void resize(size_type __sz, value_type __x = false);
2290    void flip() _NOEXCEPT;
2291
2292    bool __invariants() const;
2293
2294private:
2295    _LIBCPP_INLINE_VISIBILITY void __invalidate_all_iterators();
2296    void allocate(size_type __n);
2297    void deallocate() _NOEXCEPT;
2298    _LIBCPP_INLINE_VISIBILITY
2299    static size_type __align_it(size_type __new_size) _NOEXCEPT
2300        {return __new_size + (__bits_per_word-1) & ~(__bits_per_word-1);};
2301    _LIBCPP_INLINE_VISIBILITY  size_type __recommend(size_type __new_size) const;
2302    _LIBCPP_INLINE_VISIBILITY void __construct_at_end(size_type __n, bool __x);
2303    template <class _ForwardIterator>
2304        typename enable_if
2305        <
2306            __is_forward_iterator<_ForwardIterator>::value,
2307            void
2308        >::type
2309        __construct_at_end(_ForwardIterator __first, _ForwardIterator __last);
2310    void __append(size_type __n, const_reference __x);
2311    _LIBCPP_INLINE_VISIBILITY
2312    reference __make_ref(size_type __pos) _NOEXCEPT
2313        {return reference(__begin_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
2314    _LIBCPP_INLINE_VISIBILITY
2315    const_reference __make_ref(size_type __pos) const _NOEXCEPT
2316        {return const_reference(__begin_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
2317    _LIBCPP_INLINE_VISIBILITY
2318    iterator __make_iter(size_type __pos) _NOEXCEPT
2319        {return iterator(__begin_ + __pos / __bits_per_word, static_cast<unsigned>(__pos % __bits_per_word));}
2320    _LIBCPP_INLINE_VISIBILITY
2321    const_iterator __make_iter(size_type __pos) const _NOEXCEPT
2322        {return const_iterator(__begin_ + __pos / __bits_per_word, static_cast<unsigned>(__pos % __bits_per_word));}
2323    _LIBCPP_INLINE_VISIBILITY
2324    iterator __const_iterator_cast(const_iterator __p) _NOEXCEPT
2325        {return begin() + (__p - cbegin());}
2326
2327    _LIBCPP_INLINE_VISIBILITY
2328    void __copy_assign_alloc(const vector& __v)
2329        {__copy_assign_alloc(__v, integral_constant<bool,
2330                      __storage_traits::propagate_on_container_copy_assignment::value>());}
2331    _LIBCPP_INLINE_VISIBILITY
2332    void __copy_assign_alloc(const vector& __c, true_type)
2333        {
2334            if (__alloc() != __c.__alloc())
2335                deallocate();
2336            __alloc() = __c.__alloc();
2337        }
2338
2339    _LIBCPP_INLINE_VISIBILITY
2340    void __copy_assign_alloc(const vector&, false_type)
2341        {}
2342
2343    void __move_assign(vector& __c, false_type);
2344    void __move_assign(vector& __c, true_type)
2345        _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value);
2346    _LIBCPP_INLINE_VISIBILITY
2347    void __move_assign_alloc(vector& __c)
2348        _NOEXCEPT_(
2349            !__storage_traits::propagate_on_container_move_assignment::value ||
2350            is_nothrow_move_assignable<allocator_type>::value)
2351        {__move_assign_alloc(__c, integral_constant<bool,
2352                      __storage_traits::propagate_on_container_move_assignment::value>());}
2353    _LIBCPP_INLINE_VISIBILITY
2354    void __move_assign_alloc(vector& __c, true_type)
2355        _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
2356        {
2357            __alloc() = _VSTD::move(__c.__alloc());
2358        }
2359
2360    _LIBCPP_INLINE_VISIBILITY
2361    void __move_assign_alloc(vector&, false_type)
2362        _NOEXCEPT
2363        {}
2364
2365    _LIBCPP_INLINE_VISIBILITY
2366    static void __swap_alloc(__storage_allocator& __x, __storage_allocator& __y)
2367        _NOEXCEPT_(
2368            !__storage_traits::propagate_on_container_swap::value ||
2369            __is_nothrow_swappable<allocator_type>::value)
2370        {__swap_alloc(__x, __y, integral_constant<bool,
2371                      __storage_traits::propagate_on_container_swap::value>());}
2372
2373    _LIBCPP_INLINE_VISIBILITY
2374    static void __swap_alloc(__storage_allocator& __x, __storage_allocator& __y, true_type)
2375        _NOEXCEPT_(__is_nothrow_swappable<allocator_type>::value)
2376        {
2377            using _VSTD::swap;
2378            swap(__x, __y);
2379        }
2380    _LIBCPP_INLINE_VISIBILITY
2381    static void __swap_alloc(__storage_allocator&, __storage_allocator&, false_type)
2382        _NOEXCEPT
2383        {}
2384
2385    size_t __hash_code() const _NOEXCEPT;
2386
2387    friend class __bit_reference<vector>;
2388    friend class __bit_const_reference<vector>;
2389    friend class __bit_iterator<vector, false>;
2390    friend class __bit_iterator<vector, true>;
2391    friend struct __bit_array<vector>;
2392    friend struct _LIBCPP_TYPE_VIS_ONLY hash<vector>;
2393};
2394
2395template <class _Allocator>
2396inline _LIBCPP_INLINE_VISIBILITY
2397void
2398vector<bool, _Allocator>::__invalidate_all_iterators()
2399{
2400}
2401
2402//  Allocate space for __n objects
2403//  throws length_error if __n > max_size()
2404//  throws (probably bad_alloc) if memory run out
2405//  Precondition:  __begin_ == __end_ == __cap() == 0
2406//  Precondition:  __n > 0
2407//  Postcondition:  capacity() == __n
2408//  Postcondition:  size() == 0
2409template <class _Allocator>
2410void
2411vector<bool, _Allocator>::allocate(size_type __n)
2412{
2413    if (__n > max_size())
2414        this->__throw_length_error();
2415    __n = __external_cap_to_internal(__n);
2416    this->__begin_ = __storage_traits::allocate(this->__alloc(), __n);
2417    this->__size_ = 0;
2418    this->__cap() = __n;
2419}
2420
2421template <class _Allocator>
2422void
2423vector<bool, _Allocator>::deallocate() _NOEXCEPT
2424{
2425    if (this->__begin_ != nullptr)
2426    {
2427        __storage_traits::deallocate(this->__alloc(), this->__begin_, __cap());
2428        __invalidate_all_iterators();
2429        this->__begin_ = nullptr;
2430        this->__size_ = this->__cap() = 0;
2431    }
2432}
2433
2434template <class _Allocator>
2435typename vector<bool, _Allocator>::size_type
2436vector<bool, _Allocator>::max_size() const _NOEXCEPT
2437{
2438    size_type __amax = __storage_traits::max_size(__alloc());
2439    size_type __nmax = numeric_limits<size_type>::max() / 2;  // end() >= begin(), always
2440    if (__nmax / __bits_per_word <= __amax)
2441        return __nmax;
2442    return __internal_cap_to_external(__amax);
2443}
2444
2445//  Precondition:  __new_size > capacity()
2446template <class _Allocator>
2447inline _LIBCPP_INLINE_VISIBILITY
2448typename vector<bool, _Allocator>::size_type
2449vector<bool, _Allocator>::__recommend(size_type __new_size) const
2450{
2451    const size_type __ms = max_size();
2452    if (__new_size > __ms)
2453        this->__throw_length_error();
2454    const size_type __cap = capacity();
2455    if (__cap >= __ms / 2)
2456        return __ms;
2457    return _VSTD::max(2*__cap, __align_it(__new_size));
2458}
2459
2460//  Default constructs __n objects starting at __end_
2461//  Precondition:  __n > 0
2462//  Precondition:  size() + __n <= capacity()
2463//  Postcondition:  size() == size() + __n
2464template <class _Allocator>
2465inline _LIBCPP_INLINE_VISIBILITY
2466void
2467vector<bool, _Allocator>::__construct_at_end(size_type __n, bool __x)
2468{
2469    size_type __old_size = this->__size_;
2470    this->__size_ += __n;
2471    _VSTD::fill_n(__make_iter(__old_size), __n, __x);
2472}
2473
2474template <class _Allocator>
2475template <class _ForwardIterator>
2476typename enable_if
2477<
2478    __is_forward_iterator<_ForwardIterator>::value,
2479    void
2480>::type
2481vector<bool, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last)
2482{
2483    size_type __old_size = this->__size_;
2484    this->__size_ += _VSTD::distance(__first, __last);
2485    _VSTD::copy(__first, __last, __make_iter(__old_size));
2486}
2487
2488template <class _Allocator>
2489inline _LIBCPP_INLINE_VISIBILITY
2490vector<bool, _Allocator>::vector()
2491        _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
2492    : __begin_(nullptr),
2493      __size_(0),
2494      __cap_alloc_(0)
2495{
2496}
2497
2498template <class _Allocator>
2499inline _LIBCPP_INLINE_VISIBILITY
2500vector<bool, _Allocator>::vector(const allocator_type& __a)
2501    : __begin_(nullptr),
2502      __size_(0),
2503      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2504{
2505}
2506
2507template <class _Allocator>
2508vector<bool, _Allocator>::vector(size_type __n)
2509    : __begin_(nullptr),
2510      __size_(0),
2511      __cap_alloc_(0)
2512{
2513    if (__n > 0)
2514    {
2515        allocate(__n);
2516        __construct_at_end(__n, false);
2517    }
2518}
2519
2520#if _LIBCPP_STD_VER > 11
2521template <class _Allocator>
2522vector<bool, _Allocator>::vector(size_type __n, const allocator_type& __a)
2523    : __begin_(nullptr),
2524      __size_(0),
2525      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2526{
2527    if (__n > 0)
2528    {
2529        allocate(__n);
2530        __construct_at_end(__n, false);
2531    }
2532}
2533#endif
2534
2535template <class _Allocator>
2536vector<bool, _Allocator>::vector(size_type __n, const value_type& __x)
2537    : __begin_(nullptr),
2538      __size_(0),
2539      __cap_alloc_(0)
2540{
2541    if (__n > 0)
2542    {
2543        allocate(__n);
2544        __construct_at_end(__n, __x);
2545    }
2546}
2547
2548template <class _Allocator>
2549vector<bool, _Allocator>::vector(size_type __n, const value_type& __x, const allocator_type& __a)
2550    : __begin_(nullptr),
2551      __size_(0),
2552      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2553{
2554    if (__n > 0)
2555    {
2556        allocate(__n);
2557        __construct_at_end(__n, __x);
2558    }
2559}
2560
2561template <class _Allocator>
2562template <class _InputIterator>
2563vector<bool, _Allocator>::vector(_InputIterator __first, _InputIterator __last,
2564       typename enable_if<__is_input_iterator  <_InputIterator>::value &&
2565                         !__is_forward_iterator<_InputIterator>::value>::type*)
2566    : __begin_(nullptr),
2567      __size_(0),
2568      __cap_alloc_(0)
2569{
2570#ifndef _LIBCPP_NO_EXCEPTIONS
2571    try
2572    {
2573#endif  // _LIBCPP_NO_EXCEPTIONS
2574        for (; __first != __last; ++__first)
2575            push_back(*__first);
2576#ifndef _LIBCPP_NO_EXCEPTIONS
2577    }
2578    catch (...)
2579    {
2580        if (__begin_ != nullptr)
2581            __storage_traits::deallocate(__alloc(), __begin_, __cap());
2582        __invalidate_all_iterators();
2583        throw;
2584    }
2585#endif  // _LIBCPP_NO_EXCEPTIONS
2586}
2587
2588template <class _Allocator>
2589template <class _InputIterator>
2590vector<bool, _Allocator>::vector(_InputIterator __first, _InputIterator __last, const allocator_type& __a,
2591       typename enable_if<__is_input_iterator  <_InputIterator>::value &&
2592                         !__is_forward_iterator<_InputIterator>::value>::type*)
2593    : __begin_(nullptr),
2594      __size_(0),
2595      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2596{
2597#ifndef _LIBCPP_NO_EXCEPTIONS
2598    try
2599    {
2600#endif  // _LIBCPP_NO_EXCEPTIONS
2601        for (; __first != __last; ++__first)
2602            push_back(*__first);
2603#ifndef _LIBCPP_NO_EXCEPTIONS
2604    }
2605    catch (...)
2606    {
2607        if (__begin_ != nullptr)
2608            __storage_traits::deallocate(__alloc(), __begin_, __cap());
2609        __invalidate_all_iterators();
2610        throw;
2611    }
2612#endif  // _LIBCPP_NO_EXCEPTIONS
2613}
2614
2615template <class _Allocator>
2616template <class _ForwardIterator>
2617vector<bool, _Allocator>::vector(_ForwardIterator __first, _ForwardIterator __last,
2618                                typename enable_if<__is_forward_iterator<_ForwardIterator>::value>::type*)
2619    : __begin_(nullptr),
2620      __size_(0),
2621      __cap_alloc_(0)
2622{
2623    size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last));
2624    if (__n > 0)
2625    {
2626        allocate(__n);
2627        __construct_at_end(__first, __last);
2628    }
2629}
2630
2631template <class _Allocator>
2632template <class _ForwardIterator>
2633vector<bool, _Allocator>::vector(_ForwardIterator __first, _ForwardIterator __last, const allocator_type& __a,
2634                                typename enable_if<__is_forward_iterator<_ForwardIterator>::value>::type*)
2635    : __begin_(nullptr),
2636      __size_(0),
2637      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2638{
2639    size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last));
2640    if (__n > 0)
2641    {
2642        allocate(__n);
2643        __construct_at_end(__first, __last);
2644    }
2645}
2646
2647#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2648
2649template <class _Allocator>
2650vector<bool, _Allocator>::vector(initializer_list<value_type> __il)
2651    : __begin_(nullptr),
2652      __size_(0),
2653      __cap_alloc_(0)
2654{
2655    size_type __n = static_cast<size_type>(__il.size());
2656    if (__n > 0)
2657    {
2658        allocate(__n);
2659        __construct_at_end(__il.begin(), __il.end());
2660    }
2661}
2662
2663template <class _Allocator>
2664vector<bool, _Allocator>::vector(initializer_list<value_type> __il, const allocator_type& __a)
2665    : __begin_(nullptr),
2666      __size_(0),
2667      __cap_alloc_(0, static_cast<__storage_allocator>(__a))
2668{
2669    size_type __n = static_cast<size_type>(__il.size());
2670    if (__n > 0)
2671    {
2672        allocate(__n);
2673        __construct_at_end(__il.begin(), __il.end());
2674    }
2675}
2676
2677#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
2678
2679template <class _Allocator>
2680vector<bool, _Allocator>::~vector()
2681{
2682    if (__begin_ != nullptr)
2683        __storage_traits::deallocate(__alloc(), __begin_, __cap());
2684    __invalidate_all_iterators();
2685}
2686
2687template <class _Allocator>
2688vector<bool, _Allocator>::vector(const vector& __v)
2689    : __begin_(nullptr),
2690      __size_(0),
2691      __cap_alloc_(0, __storage_traits::select_on_container_copy_construction(__v.__alloc()))
2692{
2693    if (__v.size() > 0)
2694    {
2695        allocate(__v.size());
2696        __construct_at_end(__v.begin(), __v.end());
2697    }
2698}
2699
2700template <class _Allocator>
2701vector<bool, _Allocator>::vector(const vector& __v, const allocator_type& __a)
2702    : __begin_(nullptr),
2703      __size_(0),
2704      __cap_alloc_(0, __a)
2705{
2706    if (__v.size() > 0)
2707    {
2708        allocate(__v.size());
2709        __construct_at_end(__v.begin(), __v.end());
2710    }
2711}
2712
2713template <class _Allocator>
2714vector<bool, _Allocator>&
2715vector<bool, _Allocator>::operator=(const vector& __v)
2716{
2717    if (this != &__v)
2718    {
2719        __copy_assign_alloc(__v);
2720        if (__v.__size_)
2721        {
2722            if (__v.__size_ > capacity())
2723            {
2724                deallocate();
2725                allocate(__v.__size_);
2726            }
2727            _VSTD::copy(__v.__begin_, __v.__begin_ + __external_cap_to_internal(__v.__size_), __begin_);
2728        }
2729        __size_ = __v.__size_;
2730    }
2731    return *this;
2732}
2733
2734#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
2735
2736template <class _Allocator>
2737inline _LIBCPP_INLINE_VISIBILITY
2738vector<bool, _Allocator>::vector(vector&& __v)
2739        _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
2740    : __begin_(__v.__begin_),
2741      __size_(__v.__size_),
2742      __cap_alloc_(__v.__cap_alloc_)
2743{
2744    __v.__begin_ = nullptr;
2745    __v.__size_ = 0;
2746    __v.__cap() = 0;
2747}
2748
2749template <class _Allocator>
2750vector<bool, _Allocator>::vector(vector&& __v, const allocator_type& __a)
2751    : __begin_(nullptr),
2752      __size_(0),
2753      __cap_alloc_(0, __a)
2754{
2755    if (__a == allocator_type(__v.__alloc()))
2756    {
2757        this->__begin_ = __v.__begin_;
2758        this->__size_ = __v.__size_;
2759        this->__cap() = __v.__cap();
2760        __v.__begin_ = nullptr;
2761        __v.__cap() = __v.__size_ = 0;
2762    }
2763    else if (__v.size() > 0)
2764    {
2765        allocate(__v.size());
2766        __construct_at_end(__v.begin(), __v.end());
2767    }
2768}
2769
2770template <class _Allocator>
2771inline _LIBCPP_INLINE_VISIBILITY
2772vector<bool, _Allocator>&
2773vector<bool, _Allocator>::operator=(vector&& __v)
2774        _NOEXCEPT_(
2775             __alloc_traits::propagate_on_container_move_assignment::value &&
2776             is_nothrow_move_assignable<allocator_type>::value)
2777{
2778    __move_assign(__v, integral_constant<bool,
2779          __storage_traits::propagate_on_container_move_assignment::value>());
2780    return *this;
2781}
2782
2783template <class _Allocator>
2784void
2785vector<bool, _Allocator>::__move_assign(vector& __c, false_type)
2786{
2787    if (__alloc() != __c.__alloc())
2788        assign(__c.begin(), __c.end());
2789    else
2790        __move_assign(__c, true_type());
2791}
2792
2793template <class _Allocator>
2794void
2795vector<bool, _Allocator>::__move_assign(vector& __c, true_type)
2796    _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
2797{
2798    deallocate();
2799    this->__begin_ = __c.__begin_;
2800    this->__size_ = __c.__size_;
2801    this->__cap() = __c.__cap();
2802    __move_assign_alloc(__c);
2803    __c.__begin_ = nullptr;
2804    __c.__cap() = __c.__size_ = 0;
2805}
2806
2807#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
2808
2809template <class _Allocator>
2810void
2811vector<bool, _Allocator>::assign(size_type __n, const value_type& __x)
2812{
2813    __size_ = 0;
2814    if (__n > 0)
2815    {
2816        size_type __c = capacity();
2817        if (__n <= __c)
2818            __size_ = __n;
2819        else
2820        {
2821            vector __v(__alloc());
2822            __v.reserve(__recommend(__n));
2823            __v.__size_ = __n;
2824            swap(__v);
2825        }
2826        _VSTD::fill_n(begin(), __n, __x);
2827    }
2828}
2829
2830template <class _Allocator>
2831template <class _InputIterator>
2832typename enable_if
2833<
2834    __is_input_iterator<_InputIterator>::value &&
2835   !__is_forward_iterator<_InputIterator>::value,
2836   void
2837>::type
2838vector<bool, _Allocator>::assign(_InputIterator __first, _InputIterator __last)
2839{
2840    clear();
2841    for (; __first != __last; ++__first)
2842        push_back(*__first);
2843}
2844
2845template <class _Allocator>
2846template <class _ForwardIterator>
2847typename enable_if
2848<
2849    __is_forward_iterator<_ForwardIterator>::value,
2850   void
2851>::type
2852vector<bool, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last)
2853{
2854    clear();
2855    difference_type __n = _VSTD::distance(__first, __last);
2856    if (__n)
2857    {
2858        if (__n > capacity())
2859        {
2860            deallocate();
2861            allocate(__n);
2862        }
2863        __construct_at_end(__first, __last);
2864    }
2865}
2866
2867template <class _Allocator>
2868void
2869vector<bool, _Allocator>::reserve(size_type __n)
2870{
2871    if (__n > capacity())
2872    {
2873        vector __v(this->__alloc());
2874        __v.allocate(__n);
2875        __v.__construct_at_end(this->begin(), this->end());
2876        swap(__v);
2877        __invalidate_all_iterators();
2878    }
2879}
2880
2881template <class _Allocator>
2882void
2883vector<bool, _Allocator>::shrink_to_fit() _NOEXCEPT
2884{
2885    if (__external_cap_to_internal(size()) > __cap())
2886    {
2887#ifndef _LIBCPP_NO_EXCEPTIONS
2888        try
2889        {
2890#endif  // _LIBCPP_NO_EXCEPTIONS
2891            vector(*this, allocator_type(__alloc())).swap(*this);
2892#ifndef _LIBCPP_NO_EXCEPTIONS
2893        }
2894        catch (...)
2895        {
2896        }
2897#endif  // _LIBCPP_NO_EXCEPTIONS
2898    }
2899}
2900
2901template <class _Allocator>
2902typename vector<bool, _Allocator>::reference
2903vector<bool, _Allocator>::at(size_type __n)
2904{
2905    if (__n >= size())
2906        this->__throw_out_of_range();
2907    return (*this)[__n];
2908}
2909
2910template <class _Allocator>
2911typename vector<bool, _Allocator>::const_reference
2912vector<bool, _Allocator>::at(size_type __n) const
2913{
2914    if (__n >= size())
2915        this->__throw_out_of_range();
2916    return (*this)[__n];
2917}
2918
2919template <class _Allocator>
2920void
2921vector<bool, _Allocator>::push_back(const value_type& __x)
2922{
2923    if (this->__size_ == this->capacity())
2924        reserve(__recommend(this->__size_ + 1));
2925    ++this->__size_;
2926    back() = __x;
2927}
2928
2929template <class _Allocator>
2930typename vector<bool, _Allocator>::iterator
2931vector<bool, _Allocator>::insert(const_iterator __position, const value_type& __x)
2932{
2933    iterator __r;
2934    if (size() < capacity())
2935    {
2936        const_iterator __old_end = end();
2937        ++__size_;
2938        _VSTD::copy_backward(__position, __old_end, end());
2939        __r = __const_iterator_cast(__position);
2940    }
2941    else
2942    {
2943        vector __v(__alloc());
2944        __v.reserve(__recommend(__size_ + 1));
2945        __v.__size_ = __size_ + 1;
2946        __r = _VSTD::copy(cbegin(), __position, __v.begin());
2947        _VSTD::copy_backward(__position, cend(), __v.end());
2948        swap(__v);
2949    }
2950    *__r = __x;
2951    return __r;
2952}
2953
2954template <class _Allocator>
2955typename vector<bool, _Allocator>::iterator
2956vector<bool, _Allocator>::insert(const_iterator __position, size_type __n, const value_type& __x)
2957{
2958    iterator __r;
2959    size_type __c = capacity();
2960    if (__n <= __c && size() <= __c - __n)
2961    {
2962        const_iterator __old_end = end();
2963        __size_ += __n;
2964        _VSTD::copy_backward(__position, __old_end, end());
2965        __r = __const_iterator_cast(__position);
2966    }
2967    else
2968    {
2969        vector __v(__alloc());
2970        __v.reserve(__recommend(__size_ + __n));
2971        __v.__size_ = __size_ + __n;
2972        __r = _VSTD::copy(cbegin(), __position, __v.begin());
2973        _VSTD::copy_backward(__position, cend(), __v.end());
2974        swap(__v);
2975    }
2976    _VSTD::fill_n(__r, __n, __x);
2977    return __r;
2978}
2979
2980template <class _Allocator>
2981template <class _InputIterator>
2982typename enable_if
2983<
2984     __is_input_iterator  <_InputIterator>::value &&
2985    !__is_forward_iterator<_InputIterator>::value,
2986    typename vector<bool, _Allocator>::iterator
2987>::type
2988vector<bool, _Allocator>::insert(const_iterator __position, _InputIterator __first, _InputIterator __last)
2989{
2990    difference_type __off = __position - begin();
2991    iterator __p = __const_iterator_cast(__position);
2992    iterator __old_end = end();
2993    for (; size() != capacity() && __first != __last; ++__first)
2994    {
2995        ++this->__size_;
2996        back() = *__first;
2997    }
2998    vector __v(__alloc());
2999    if (__first != __last)
3000    {
3001#ifndef _LIBCPP_NO_EXCEPTIONS
3002        try
3003        {
3004#endif  // _LIBCPP_NO_EXCEPTIONS
3005            __v.assign(__first, __last);
3006            difference_type __old_size = static_cast<difference_type>(__old_end - begin());
3007            difference_type __old_p = __p - begin();
3008            reserve(__recommend(size() + __v.size()));
3009            __p = begin() + __old_p;
3010            __old_end = begin() + __old_size;
3011#ifndef _LIBCPP_NO_EXCEPTIONS
3012        }
3013        catch (...)
3014        {
3015            erase(__old_end, end());
3016            throw;
3017        }
3018#endif  // _LIBCPP_NO_EXCEPTIONS
3019    }
3020    __p = _VSTD::rotate(__p, __old_end, end());
3021    insert(__p, __v.begin(), __v.end());
3022    return begin() + __off;
3023}
3024
3025template <class _Allocator>
3026template <class _ForwardIterator>
3027typename enable_if
3028<
3029    __is_forward_iterator<_ForwardIterator>::value,
3030    typename vector<bool, _Allocator>::iterator
3031>::type
3032vector<bool, _Allocator>::insert(const_iterator __position, _ForwardIterator __first, _ForwardIterator __last)
3033{
3034    difference_type __n = _VSTD::distance(__first, __last);
3035    iterator __r;
3036    size_type __c = capacity();
3037    if (__n <= __c && size() <= __c - __n)
3038    {
3039        const_iterator __old_end = end();
3040        __size_ += __n;
3041        _VSTD::copy_backward(__position, __old_end, end());
3042        __r = __const_iterator_cast(__position);
3043    }
3044    else
3045    {
3046        vector __v(__alloc());
3047        __v.reserve(__recommend(__size_ + __n));
3048        __v.__size_ = __size_ + __n;
3049        __r = _VSTD::copy(cbegin(), __position, __v.begin());
3050        _VSTD::copy_backward(__position, cend(), __v.end());
3051        swap(__v);
3052    }
3053    _VSTD::copy(__first, __last, __r);
3054    return __r;
3055}
3056
3057template <class _Allocator>
3058inline _LIBCPP_INLINE_VISIBILITY
3059typename vector<bool, _Allocator>::iterator
3060vector<bool, _Allocator>::erase(const_iterator __position)
3061{
3062    iterator __r = __const_iterator_cast(__position);
3063    _VSTD::copy(__position + 1, this->cend(), __r);
3064    --__size_;
3065    return __r;
3066}
3067
3068template <class _Allocator>
3069typename vector<bool, _Allocator>::iterator
3070vector<bool, _Allocator>::erase(const_iterator __first, const_iterator __last)
3071{
3072    iterator __r = __const_iterator_cast(__first);
3073    difference_type __d = __last - __first;
3074    _VSTD::copy(__last, this->cend(), __r);
3075    __size_ -= __d;
3076    return __r;
3077}
3078
3079template <class _Allocator>
3080void
3081vector<bool, _Allocator>::swap(vector& __x)
3082        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
3083                   __is_nothrow_swappable<allocator_type>::value)
3084{
3085    _VSTD::swap(this->__begin_, __x.__begin_);
3086    _VSTD::swap(this->__size_, __x.__size_);
3087    _VSTD::swap(this->__cap(), __x.__cap());
3088    __swap_alloc(this->__alloc(), __x.__alloc());
3089}
3090
3091template <class _Allocator>
3092void
3093vector<bool, _Allocator>::resize(size_type __sz, value_type __x)
3094{
3095    size_type __cs = size();
3096    if (__cs < __sz)
3097    {
3098        iterator __r;
3099        size_type __c = capacity();
3100        size_type __n = __sz - __cs;
3101        if (__n <= __c && __cs <= __c - __n)
3102        {
3103            __r = end();
3104            __size_ += __n;
3105        }
3106        else
3107        {
3108            vector __v(__alloc());
3109            __v.reserve(__recommend(__size_ + __n));
3110            __v.__size_ = __size_ + __n;
3111            __r = _VSTD::copy(cbegin(), cend(), __v.begin());
3112            swap(__v);
3113        }
3114        _VSTD::fill_n(__r, __n, __x);
3115    }
3116    else
3117        __size_ = __sz;
3118}
3119
3120template <class _Allocator>
3121void
3122vector<bool, _Allocator>::flip() _NOEXCEPT
3123{
3124    // do middle whole words
3125    size_type __n = __size_;
3126    __storage_pointer __p = __begin_;
3127    for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)
3128        *__p = ~*__p;
3129    // do last partial word
3130    if (__n > 0)
3131    {
3132        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
3133        __storage_type __b = *__p & __m;
3134        *__p &= ~__m;
3135        *__p |= ~__b & __m;
3136    }
3137}
3138
3139template <class _Allocator>
3140bool
3141vector<bool, _Allocator>::__invariants() const
3142{
3143    if (this->__begin_ == nullptr)
3144    {
3145        if (this->__size_ != 0 || this->__cap() != 0)
3146            return false;
3147    }
3148    else
3149    {
3150        if (this->__cap() == 0)
3151            return false;
3152        if (this->__size_ > this->capacity())
3153            return false;
3154    }
3155    return true;
3156}
3157
3158template <class _Allocator>
3159size_t
3160vector<bool, _Allocator>::__hash_code() const _NOEXCEPT
3161{
3162    size_t __h = 0;
3163    // do middle whole words
3164    size_type __n = __size_;
3165    __storage_pointer __p = __begin_;
3166    for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)
3167        __h ^= *__p;
3168    // do last partial word
3169    if (__n > 0)
3170    {
3171        const __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
3172        __h ^= *__p & __m;
3173    }
3174    return __h;
3175}
3176
3177template <class _Allocator>
3178struct _LIBCPP_TYPE_VIS_ONLY hash<vector<bool, _Allocator> >
3179    : public unary_function<vector<bool, _Allocator>, size_t>
3180{
3181    _LIBCPP_INLINE_VISIBILITY
3182    size_t operator()(const vector<bool, _Allocator>& __vec) const _NOEXCEPT
3183        {return __vec.__hash_code();}
3184};
3185
3186template <class _Tp, class _Allocator>
3187inline _LIBCPP_INLINE_VISIBILITY
3188bool
3189operator==(const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3190{
3191    const typename vector<_Tp, _Allocator>::size_type __sz = __x.size();
3192    return __sz == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
3193}
3194
3195template <class _Tp, class _Allocator>
3196inline _LIBCPP_INLINE_VISIBILITY
3197bool
3198operator!=(const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3199{
3200    return !(__x == __y);
3201}
3202
3203template <class _Tp, class _Allocator>
3204inline _LIBCPP_INLINE_VISIBILITY
3205bool
3206operator< (const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3207{
3208    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
3209}
3210
3211template <class _Tp, class _Allocator>
3212inline _LIBCPP_INLINE_VISIBILITY
3213bool
3214operator> (const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3215{
3216    return __y < __x;
3217}
3218
3219template <class _Tp, class _Allocator>
3220inline _LIBCPP_INLINE_VISIBILITY
3221bool
3222operator>=(const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3223{
3224    return !(__x < __y);
3225}
3226
3227template <class _Tp, class _Allocator>
3228inline _LIBCPP_INLINE_VISIBILITY
3229bool
3230operator<=(const vector<_Tp, _Allocator>& __x, const vector<_Tp, _Allocator>& __y)
3231{
3232    return !(__y < __x);
3233}
3234
3235template <class _Tp, class _Allocator>
3236inline _LIBCPP_INLINE_VISIBILITY
3237void
3238swap(vector<_Tp, _Allocator>& __x, vector<_Tp, _Allocator>& __y)
3239    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
3240{
3241    __x.swap(__y);
3242}
3243
3244_LIBCPP_END_NAMESPACE_STD
3245
3246#endif  // _LIBCPP_VECTOR
3247