map revision 263272
1// -*- C++ -*-
2//===----------------------------- map ------------------------------------===//
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_MAP
12#define _LIBCPP_MAP
13
14/*
15
16    map synopsis
17
18namespace std
19{
20
21template <class Key, class T, class Compare = less<Key>,
22          class Allocator = allocator<pair<const Key, T>>>
23class map
24{
25public:
26    // types:
27    typedef Key                                      key_type;
28    typedef T                                        mapped_type;
29    typedef pair<const key_type, mapped_type>        value_type;
30    typedef Compare                                  key_compare;
31    typedef Allocator                                allocator_type;
32    typedef typename allocator_type::reference       reference;
33    typedef typename allocator_type::const_reference const_reference;
34    typedef typename allocator_type::pointer         pointer;
35    typedef typename allocator_type::const_pointer   const_pointer;
36    typedef typename allocator_type::size_type       size_type;
37    typedef typename allocator_type::difference_type difference_type;
38
39    typedef implementation-defined                   iterator;
40    typedef implementation-defined                   const_iterator;
41    typedef std::reverse_iterator<iterator>          reverse_iterator;
42    typedef std::reverse_iterator<const_iterator>    const_reverse_iterator;
43
44    class value_compare
45        : public binary_function<value_type, value_type, bool>
46    {
47        friend class map;
48    protected:
49        key_compare comp;
50
51        value_compare(key_compare c);
52    public:
53        bool operator()(const value_type& x, const value_type& y) const;
54    };
55
56    // construct/copy/destroy:
57    map()
58        noexcept(
59            is_nothrow_default_constructible<allocator_type>::value &&
60            is_nothrow_default_constructible<key_compare>::value &&
61            is_nothrow_copy_constructible<key_compare>::value);
62    explicit map(const key_compare& comp);
63    map(const key_compare& comp, const allocator_type& a);
64    template <class InputIterator>
65        map(InputIterator first, InputIterator last,
66            const key_compare& comp = key_compare());
67    template <class InputIterator>
68        map(InputIterator first, InputIterator last,
69            const key_compare& comp, const allocator_type& a);
70    map(const map& m);
71    map(map&& m)
72        noexcept(
73            is_nothrow_move_constructible<allocator_type>::value &&
74            is_nothrow_move_constructible<key_compare>::value);
75    explicit map(const allocator_type& a);
76    map(const map& m, const allocator_type& a);
77    map(map&& m, const allocator_type& a);
78    map(initializer_list<value_type> il, const key_compare& comp = key_compare());
79    map(initializer_list<value_type> il, const key_compare& comp, const allocator_type& a);
80    template <class InputIterator>
81        map(InputIterator first, InputIterator last, const allocator_type& a)
82            : map(first, last, Compare(), a) {}  // C++14
83    map(initializer_list<value_type> il, const allocator_type& a)
84        : map(il, Compare(), a) {}  // C++14
85   ~map();
86
87    map& operator=(const map& m);
88    map& operator=(map&& m)
89        noexcept(
90            allocator_type::propagate_on_container_move_assignment::value &&
91            is_nothrow_move_assignable<allocator_type>::value &&
92            is_nothrow_move_assignable<key_compare>::value);
93    map& operator=(initializer_list<value_type> il);
94
95    // iterators:
96          iterator begin() noexcept;
97    const_iterator begin() const noexcept;
98          iterator end() noexcept;
99    const_iterator end()   const noexcept;
100
101          reverse_iterator rbegin() noexcept;
102    const_reverse_iterator rbegin() const noexcept;
103          reverse_iterator rend() noexcept;
104    const_reverse_iterator rend()   const noexcept;
105
106    const_iterator         cbegin()  const noexcept;
107    const_iterator         cend()    const noexcept;
108    const_reverse_iterator crbegin() const noexcept;
109    const_reverse_iterator crend()   const noexcept;
110
111    // capacity:
112    bool      empty()    const noexcept;
113    size_type size()     const noexcept;
114    size_type max_size() const noexcept;
115
116    // element access:
117    mapped_type& operator[](const key_type& k);
118    mapped_type& operator[](key_type&& k);
119
120          mapped_type& at(const key_type& k);
121    const mapped_type& at(const key_type& k) const;
122
123    // modifiers:
124    template <class... Args>
125        pair<iterator, bool> emplace(Args&&... args);
126    template <class... Args>
127        iterator emplace_hint(const_iterator position, Args&&... args);
128    pair<iterator, bool> insert(const value_type& v);
129    template <class P>
130        pair<iterator, bool> insert(P&& p);
131    iterator insert(const_iterator position, const value_type& v);
132    template <class P>
133        iterator insert(const_iterator position, P&& p);
134    template <class InputIterator>
135        void insert(InputIterator first, InputIterator last);
136    void insert(initializer_list<value_type> il);
137
138    iterator  erase(const_iterator position);
139    size_type erase(const key_type& k);
140    iterator  erase(const_iterator first, const_iterator last);
141    void clear() noexcept;
142
143    void swap(map& m)
144        noexcept(
145            __is_nothrow_swappable<key_compare>::value &&
146            (!allocator_type::propagate_on_container_swap::value ||
147             __is_nothrow_swappable<allocator_type>::value));
148
149    // observers:
150    allocator_type get_allocator() const noexcept;
151    key_compare    key_comp()      const;
152    value_compare  value_comp()    const;
153
154    // map operations:
155          iterator find(const key_type& k);
156    const_iterator find(const key_type& k) const;
157    template<typename K>
158        iterator find(const K& x);              // C++14
159    template<typename K>
160        const_iterator find(const K& x) const;  // C++14
161    template<typename K>
162      size_type count(const K& x) const;
163
164    size_type      count(const key_type& k) const;
165          iterator lower_bound(const key_type& k);
166    const_iterator lower_bound(const key_type& k) const;
167    template<typename K>
168        iterator lower_bound(const K& x);              // C++14
169    template<typename K>
170        const_iterator lower_bound(const K& x) const;  // C++14
171
172          iterator upper_bound(const key_type& k);
173    const_iterator upper_bound(const key_type& k) const;
174    template<typename K>
175        iterator upper_bound(const K& x);              // C++14
176    template<typename K>
177        const_iterator upper_bound(const K& x) const;  // C++14
178
179    pair<iterator,iterator>             equal_range(const key_type& k);
180    pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
181    template<typename K>
182        pair<iterator,iterator>             equal_range(const K& x);        // C++14
183    template<typename K>
184        pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14
185};
186
187template <class Key, class T, class Compare, class Allocator>
188bool
189operator==(const map<Key, T, Compare, Allocator>& x,
190           const map<Key, T, Compare, Allocator>& y);
191
192template <class Key, class T, class Compare, class Allocator>
193bool
194operator< (const map<Key, T, Compare, Allocator>& x,
195           const map<Key, T, Compare, Allocator>& y);
196
197template <class Key, class T, class Compare, class Allocator>
198bool
199operator!=(const map<Key, T, Compare, Allocator>& x,
200           const map<Key, T, Compare, Allocator>& y);
201
202template <class Key, class T, class Compare, class Allocator>
203bool
204operator> (const map<Key, T, Compare, Allocator>& x,
205           const map<Key, T, Compare, Allocator>& y);
206
207template <class Key, class T, class Compare, class Allocator>
208bool
209operator>=(const map<Key, T, Compare, Allocator>& x,
210           const map<Key, T, Compare, Allocator>& y);
211
212template <class Key, class T, class Compare, class Allocator>
213bool
214operator<=(const map<Key, T, Compare, Allocator>& x,
215           const map<Key, T, Compare, Allocator>& y);
216
217// specialized algorithms:
218template <class Key, class T, class Compare, class Allocator>
219void
220swap(map<Key, T, Compare, Allocator>& x, map<Key, T, Compare, Allocator>& y)
221    noexcept(noexcept(x.swap(y)));
222
223template <class Key, class T, class Compare = less<Key>,
224          class Allocator = allocator<pair<const Key, T>>>
225class multimap
226{
227public:
228    // types:
229    typedef Key                                      key_type;
230    typedef T                                        mapped_type;
231    typedef pair<const key_type,mapped_type>         value_type;
232    typedef Compare                                  key_compare;
233    typedef Allocator                                allocator_type;
234    typedef typename allocator_type::reference       reference;
235    typedef typename allocator_type::const_reference const_reference;
236    typedef typename allocator_type::size_type       size_type;
237    typedef typename allocator_type::difference_type difference_type;
238    typedef typename allocator_type::pointer         pointer;
239    typedef typename allocator_type::const_pointer   const_pointer;
240
241    typedef implementation-defined                   iterator;
242    typedef implementation-defined                   const_iterator;
243    typedef std::reverse_iterator<iterator>          reverse_iterator;
244    typedef std::reverse_iterator<const_iterator>    const_reverse_iterator;
245
246    class value_compare
247        : public binary_function<value_type,value_type,bool>
248    {
249        friend class multimap;
250    protected:
251        key_compare comp;
252        value_compare(key_compare c);
253    public:
254        bool operator()(const value_type& x, const value_type& y) const;
255    };
256
257    // construct/copy/destroy:
258    multimap()
259        noexcept(
260            is_nothrow_default_constructible<allocator_type>::value &&
261            is_nothrow_default_constructible<key_compare>::value &&
262            is_nothrow_copy_constructible<key_compare>::value);
263    explicit multimap(const key_compare& comp);
264    multimap(const key_compare& comp, const allocator_type& a);
265    template <class InputIterator>
266        multimap(InputIterator first, InputIterator last, const key_compare& comp);
267    template <class InputIterator>
268        multimap(InputIterator first, InputIterator last, const key_compare& comp,
269                 const allocator_type& a);
270    multimap(const multimap& m);
271    multimap(multimap&& m)
272        noexcept(
273            is_nothrow_move_constructible<allocator_type>::value &&
274            is_nothrow_move_constructible<key_compare>::value);
275    explicit multimap(const allocator_type& a);
276    multimap(const multimap& m, const allocator_type& a);
277    multimap(multimap&& m, const allocator_type& a);
278    multimap(initializer_list<value_type> il, const key_compare& comp = key_compare());
279    multimap(initializer_list<value_type> il, const key_compare& comp,
280             const allocator_type& a);
281    template <class InputIterator>
282        multimap(InputIterator first, InputIterator last, const allocator_type& a)
283            : multimap(first, last, Compare(), a) {} // C++14
284    multimap(initializer_list<value_type> il, const allocator_type& a)
285        : multimap(il, Compare(), a) {} // C++14
286    ~multimap();
287
288    multimap& operator=(const multimap& m);
289    multimap& operator=(multimap&& m)
290        noexcept(
291            allocator_type::propagate_on_container_move_assignment::value &&
292            is_nothrow_move_assignable<allocator_type>::value &&
293            is_nothrow_move_assignable<key_compare>::value);
294    multimap& operator=(initializer_list<value_type> il);
295
296    // iterators:
297          iterator begin() noexcept;
298    const_iterator begin() const noexcept;
299          iterator end() noexcept;
300    const_iterator end()   const noexcept;
301
302          reverse_iterator rbegin() noexcept;
303    const_reverse_iterator rbegin() const noexcept;
304          reverse_iterator rend() noexcept;
305    const_reverse_iterator rend()   const noexcept;
306
307    const_iterator         cbegin()  const noexcept;
308    const_iterator         cend()    const noexcept;
309    const_reverse_iterator crbegin() const noexcept;
310    const_reverse_iterator crend()   const noexcept;
311
312    // capacity:
313    bool      empty()    const noexcept;
314    size_type size()     const noexcept;
315    size_type max_size() const noexcept;
316
317    // modifiers:
318    template <class... Args>
319        iterator emplace(Args&&... args);
320    template <class... Args>
321        iterator emplace_hint(const_iterator position, Args&&... args);
322    iterator insert(const value_type& v);
323    template <class P>
324        iterator insert(P&& p);
325    iterator insert(const_iterator position, const value_type& v);
326    template <class P>
327        iterator insert(const_iterator position, P&& p);
328    template <class InputIterator>
329        void insert(InputIterator first, InputIterator last);
330    void insert(initializer_list<value_type> il);
331
332    iterator  erase(const_iterator position);
333    size_type erase(const key_type& k);
334    iterator  erase(const_iterator first, const_iterator last);
335    void clear() noexcept;
336
337    void swap(multimap& m)
338        noexcept(
339            __is_nothrow_swappable<key_compare>::value &&
340            (!allocator_type::propagate_on_container_swap::value ||
341             __is_nothrow_swappable<allocator_type>::value));
342
343    // observers:
344    allocator_type get_allocator() const noexcept;
345    key_compare    key_comp()      const;
346    value_compare  value_comp()    const;
347
348    // map operations:
349          iterator find(const key_type& k);
350    const_iterator find(const key_type& k) const;
351    template<typename K>
352        iterator find(const K& x);              // C++14
353    template<typename K>
354        const_iterator find(const K& x) const;  // C++14
355    template<typename K>
356      size_type count(const K& x) const;
357
358    size_type      count(const key_type& k) const;
359          iterator lower_bound(const key_type& k);
360    const_iterator lower_bound(const key_type& k) const;
361    template<typename K>
362        iterator lower_bound(const K& x);              // C++14
363    template<typename K>
364        const_iterator lower_bound(const K& x) const;  // C++14
365
366          iterator upper_bound(const key_type& k);
367    const_iterator upper_bound(const key_type& k) const;
368    template<typename K>
369        iterator upper_bound(const K& x);              // C++14
370    template<typename K>
371        const_iterator upper_bound(const K& x) const;  // C++14
372
373    pair<iterator,iterator>             equal_range(const key_type& k);
374    pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
375    template<typename K>
376        pair<iterator,iterator>             equal_range(const K& x);        // C++14
377    template<typename K>
378        pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14
379};
380
381template <class Key, class T, class Compare, class Allocator>
382bool
383operator==(const multimap<Key, T, Compare, Allocator>& x,
384           const multimap<Key, T, Compare, Allocator>& y);
385
386template <class Key, class T, class Compare, class Allocator>
387bool
388operator< (const multimap<Key, T, Compare, Allocator>& x,
389           const multimap<Key, T, Compare, Allocator>& y);
390
391template <class Key, class T, class Compare, class Allocator>
392bool
393operator!=(const multimap<Key, T, Compare, Allocator>& x,
394           const multimap<Key, T, Compare, Allocator>& y);
395
396template <class Key, class T, class Compare, class Allocator>
397bool
398operator> (const multimap<Key, T, Compare, Allocator>& x,
399           const multimap<Key, T, Compare, Allocator>& y);
400
401template <class Key, class T, class Compare, class Allocator>
402bool
403operator>=(const multimap<Key, T, Compare, Allocator>& x,
404           const multimap<Key, T, Compare, Allocator>& y);
405
406template <class Key, class T, class Compare, class Allocator>
407bool
408operator<=(const multimap<Key, T, Compare, Allocator>& x,
409           const multimap<Key, T, Compare, Allocator>& y);
410
411// specialized algorithms:
412template <class Key, class T, class Compare, class Allocator>
413void
414swap(multimap<Key, T, Compare, Allocator>& x,
415     multimap<Key, T, Compare, Allocator>& y)
416    noexcept(noexcept(x.swap(y)));
417
418}  // std
419
420*/
421
422#include <__config>
423#include <__tree>
424#include <iterator>
425#include <memory>
426#include <utility>
427#include <functional>
428#include <initializer_list>
429
430#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
431#pragma GCC system_header
432#endif
433
434_LIBCPP_BEGIN_NAMESPACE_STD
435
436template <class _Key, class _CP, class _Compare, bool = is_empty<_Compare>::value
437#if __has_feature(is_final)
438                                                        && !__is_final(_Compare)
439#endif
440         >
441class __map_value_compare
442    : private _Compare
443{
444public:
445    _LIBCPP_INLINE_VISIBILITY
446    __map_value_compare()
447        _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value)
448        : _Compare() {}
449    _LIBCPP_INLINE_VISIBILITY
450    __map_value_compare(_Compare c)
451        _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value)
452        : _Compare(c) {}
453    _LIBCPP_INLINE_VISIBILITY
454    const _Compare& key_comp() const _NOEXCEPT {return *this;}
455    _LIBCPP_INLINE_VISIBILITY
456    bool operator()(const _CP& __x, const _CP& __y) const
457        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y.__cc.first);}
458    _LIBCPP_INLINE_VISIBILITY
459    bool operator()(const _CP& __x, const _Key& __y) const
460        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y);}
461    _LIBCPP_INLINE_VISIBILITY
462    bool operator()(const _Key& __x, const _CP& __y) const
463        {return static_cast<const _Compare&>(*this)(__x, __y.__cc.first);}
464
465#if _LIBCPP_STD_VER > 11
466    template <typename _K2>
467    _LIBCPP_INLINE_VISIBILITY
468    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
469    operator () ( const _K2& __x, const _CP& __y ) const
470        {return static_cast<const _Compare&>(*this) (__x, __y.__cc.first);}
471
472    template <typename _K2>
473    _LIBCPP_INLINE_VISIBILITY
474    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
475    operator () (const _CP& __x, const _K2& __y) const
476        {return static_cast<const _Compare&>(*this) (__x.__cc.first, __y);}
477#endif
478};
479
480template <class _Key, class _CP, class _Compare>
481class __map_value_compare<_Key, _CP, _Compare, false>
482{
483    _Compare comp;
484
485public:
486    _LIBCPP_INLINE_VISIBILITY
487    __map_value_compare()
488        _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value)
489        : comp() {}
490    _LIBCPP_INLINE_VISIBILITY
491    __map_value_compare(_Compare c)
492        _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value)
493        : comp(c) {}
494    _LIBCPP_INLINE_VISIBILITY
495    const _Compare& key_comp() const _NOEXCEPT {return comp;}
496
497    _LIBCPP_INLINE_VISIBILITY
498    bool operator()(const _CP& __x, const _CP& __y) const
499        {return comp(__x.__cc.first, __y.__cc.first);}
500    _LIBCPP_INLINE_VISIBILITY
501    bool operator()(const _CP& __x, const _Key& __y) const
502        {return comp(__x.__cc.first, __y);}
503    _LIBCPP_INLINE_VISIBILITY
504    bool operator()(const _Key& __x, const _CP& __y) const
505        {return comp(__x, __y.__cc.first);}
506
507#if _LIBCPP_STD_VER > 11
508    template <typename _K2>
509    _LIBCPP_INLINE_VISIBILITY
510    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
511    operator () ( const _K2& __x, const _CP& __y ) const
512        {return comp (__x, __y.__cc.first);}
513
514    template <typename _K2>
515    _LIBCPP_INLINE_VISIBILITY
516    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
517    operator () (const _CP& __x, const _K2& __y) const
518        {return comp (__x.__cc.first, __y);}
519#endif
520};
521
522template <class _Allocator>
523class __map_node_destructor
524{
525    typedef _Allocator                          allocator_type;
526    typedef allocator_traits<allocator_type>    __alloc_traits;
527    typedef typename __alloc_traits::value_type::value_type value_type;
528public:
529    typedef typename __alloc_traits::pointer    pointer;
530private:
531    typedef typename value_type::value_type::first_type     first_type;
532    typedef typename value_type::value_type::second_type    second_type;
533
534    allocator_type& __na_;
535
536    __map_node_destructor& operator=(const __map_node_destructor&);
537
538public:
539    bool __first_constructed;
540    bool __second_constructed;
541
542    _LIBCPP_INLINE_VISIBILITY
543    explicit __map_node_destructor(allocator_type& __na) _NOEXCEPT
544        : __na_(__na),
545          __first_constructed(false),
546          __second_constructed(false)
547        {}
548
549#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
550    _LIBCPP_INLINE_VISIBILITY
551    __map_node_destructor(__tree_node_destructor<allocator_type>&& __x) _NOEXCEPT
552        : __na_(__x.__na_),
553          __first_constructed(__x.__value_constructed),
554          __second_constructed(__x.__value_constructed)
555        {
556            __x.__value_constructed = false;
557        }
558#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
559
560    _LIBCPP_INLINE_VISIBILITY
561    void operator()(pointer __p) _NOEXCEPT
562    {
563        if (__second_constructed)
564            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.second));
565        if (__first_constructed)
566            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.first));
567        if (__p)
568            __alloc_traits::deallocate(__na_, __p, 1);
569    }
570};
571
572template <class _Key, class _Tp, class _Compare, class _Allocator>
573    class map;
574template <class _Key, class _Tp, class _Compare, class _Allocator>
575    class multimap;
576template <class _TreeIterator> class __map_const_iterator;
577
578#if __cplusplus >= 201103L
579
580template <class _Key, class _Tp>
581union __value_type
582{
583    typedef _Key                                     key_type;
584    typedef _Tp                                      mapped_type;
585    typedef pair<const key_type, mapped_type>        value_type;
586    typedef pair<key_type, mapped_type>              __nc_value_type;
587
588    value_type __cc;
589    __nc_value_type __nc;
590
591    template <class ..._Args>
592    _LIBCPP_INLINE_VISIBILITY
593    __value_type(_Args&& ...__args)
594        : __cc(std::forward<_Args>(__args)...) {}
595
596    _LIBCPP_INLINE_VISIBILITY
597    __value_type(const __value_type& __v)
598        : __cc(__v.__cc) {}
599
600    _LIBCPP_INLINE_VISIBILITY
601    __value_type(__value_type& __v)
602        : __cc(__v.__cc) {}
603
604    _LIBCPP_INLINE_VISIBILITY
605    __value_type(__value_type&& __v)
606        : __nc(std::move(__v.__nc)) {}
607
608    _LIBCPP_INLINE_VISIBILITY
609    __value_type& operator=(const __value_type& __v)
610        {__nc = __v.__cc; return *this;}
611
612    _LIBCPP_INLINE_VISIBILITY
613    __value_type& operator=(__value_type&& __v)
614        {__nc = std::move(__v.__nc); return *this;}
615
616    _LIBCPP_INLINE_VISIBILITY
617    ~__value_type() {__cc.~value_type();}
618};
619
620#else
621
622template <class _Key, class _Tp>
623struct __value_type
624{
625    typedef _Key                                     key_type;
626    typedef _Tp                                      mapped_type;
627    typedef pair<const key_type, mapped_type>        value_type;
628
629    value_type __cc;
630
631    _LIBCPP_INLINE_VISIBILITY
632    __value_type() {}
633
634    template <class _A0>
635    _LIBCPP_INLINE_VISIBILITY
636    __value_type(const _A0& __a0)
637        : __cc(__a0) {}
638
639    template <class _A0, class _A1>
640    _LIBCPP_INLINE_VISIBILITY
641    __value_type(const _A0& __a0, const _A1& __a1)
642        : __cc(__a0, __a1) {}
643};
644
645#endif
646
647template <class _TreeIterator>
648class _LIBCPP_TYPE_VIS_ONLY __map_iterator
649{
650    _TreeIterator __i_;
651
652    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
653    typedef const typename _TreeIterator::value_type::value_type::first_type __key_type;
654    typedef typename _TreeIterator::value_type::value_type::second_type      __mapped_type;
655public:
656    typedef bidirectional_iterator_tag                           iterator_category;
657    typedef pair<__key_type, __mapped_type>                      value_type;
658    typedef typename _TreeIterator::difference_type              difference_type;
659    typedef value_type&                                          reference;
660    typedef typename __pointer_traits::template
661#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
662            rebind<value_type>
663#else
664            rebind<value_type>::other
665#endif
666                                                                 pointer;
667
668    _LIBCPP_INLINE_VISIBILITY
669    __map_iterator() _NOEXCEPT {}
670
671    _LIBCPP_INLINE_VISIBILITY
672    __map_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
673
674    _LIBCPP_INLINE_VISIBILITY
675    reference operator*() const {return __i_->__cc;}
676    _LIBCPP_INLINE_VISIBILITY
677    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
678
679    _LIBCPP_INLINE_VISIBILITY
680    __map_iterator& operator++() {++__i_; return *this;}
681    _LIBCPP_INLINE_VISIBILITY
682    __map_iterator operator++(int)
683    {
684        __map_iterator __t(*this);
685        ++(*this);
686        return __t;
687    }
688
689    _LIBCPP_INLINE_VISIBILITY
690    __map_iterator& operator--() {--__i_; return *this;}
691    _LIBCPP_INLINE_VISIBILITY
692    __map_iterator operator--(int)
693    {
694        __map_iterator __t(*this);
695        --(*this);
696        return __t;
697    }
698
699    friend _LIBCPP_INLINE_VISIBILITY
700    bool operator==(const __map_iterator& __x, const __map_iterator& __y)
701        {return __x.__i_ == __y.__i_;}
702    friend 
703    _LIBCPP_INLINE_VISIBILITY
704    bool operator!=(const __map_iterator& __x, const __map_iterator& __y)
705        {return __x.__i_ != __y.__i_;}
706
707    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
708    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
709    template <class> friend class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator;
710};
711
712template <class _TreeIterator>
713class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator
714{
715    _TreeIterator __i_;
716
717    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
718    typedef const typename _TreeIterator::value_type::value_type::first_type __key_type;
719    typedef typename _TreeIterator::value_type::value_type::second_type      __mapped_type;
720public:
721    typedef bidirectional_iterator_tag                           iterator_category;
722    typedef pair<__key_type, __mapped_type>                      value_type;
723    typedef typename _TreeIterator::difference_type              difference_type;
724    typedef const value_type&                                    reference;
725    typedef typename __pointer_traits::template
726#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
727            rebind<const value_type>
728#else
729            rebind<const value_type>::other
730#endif
731                                                                 pointer;
732
733    _LIBCPP_INLINE_VISIBILITY
734    __map_const_iterator() _NOEXCEPT {}
735
736    _LIBCPP_INLINE_VISIBILITY
737    __map_const_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
738    _LIBCPP_INLINE_VISIBILITY
739    __map_const_iterator(
740            __map_iterator<typename _TreeIterator::__non_const_iterator> __i)
741                _NOEXCEPT
742                : __i_(__i.__i_) {}
743
744    _LIBCPP_INLINE_VISIBILITY
745    reference operator*() const {return __i_->__cc;}
746    _LIBCPP_INLINE_VISIBILITY
747    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
748
749    _LIBCPP_INLINE_VISIBILITY
750    __map_const_iterator& operator++() {++__i_; return *this;}
751    _LIBCPP_INLINE_VISIBILITY
752    __map_const_iterator operator++(int)
753    {
754        __map_const_iterator __t(*this);
755        ++(*this);
756        return __t;
757    }
758
759    _LIBCPP_INLINE_VISIBILITY
760    __map_const_iterator& operator--() {--__i_; return *this;}
761    _LIBCPP_INLINE_VISIBILITY
762    __map_const_iterator operator--(int)
763    {
764        __map_const_iterator __t(*this);
765        --(*this);
766        return __t;
767    }
768
769    friend _LIBCPP_INLINE_VISIBILITY
770    bool operator==(const __map_const_iterator& __x, const __map_const_iterator& __y)
771        {return __x.__i_ == __y.__i_;}
772    friend _LIBCPP_INLINE_VISIBILITY
773    bool operator!=(const __map_const_iterator& __x, const __map_const_iterator& __y)
774        {return __x.__i_ != __y.__i_;}
775
776    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
777    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
778    template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY __tree_const_iterator;
779};
780
781template <class _Key, class _Tp, class _Compare = less<_Key>,
782          class _Allocator = allocator<pair<const _Key, _Tp> > >
783class _LIBCPP_TYPE_VIS_ONLY map
784{
785public:
786    // types:
787    typedef _Key                                     key_type;
788    typedef _Tp                                      mapped_type;
789    typedef pair<const key_type, mapped_type>        value_type;
790    typedef pair<key_type, mapped_type>              __nc_value_type;
791    typedef _Compare                                 key_compare;
792    typedef _Allocator                               allocator_type;
793    typedef value_type&                              reference;
794    typedef const value_type&                        const_reference;
795
796    class _LIBCPP_TYPE_VIS_ONLY value_compare
797        : public binary_function<value_type, value_type, bool>
798    {
799        friend class map;
800    protected:
801        key_compare comp;
802
803        _LIBCPP_INLINE_VISIBILITY value_compare(key_compare c) : comp(c) {}
804    public:
805        _LIBCPP_INLINE_VISIBILITY
806        bool operator()(const value_type& __x, const value_type& __y) const
807            {return comp(__x.first, __y.first);}
808    };
809
810private:
811
812    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
813    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
814    typedef typename allocator_traits<allocator_type>::template
815#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
816            rebind_alloc<__value_type>
817#else
818            rebind_alloc<__value_type>::other
819#endif
820                                                           __allocator_type;
821    typedef __tree<__value_type, __vc, __allocator_type>   __base;
822    typedef typename __base::__node_traits                 __node_traits;
823    typedef allocator_traits<allocator_type>               __alloc_traits;
824
825    __base __tree_;
826
827public:
828    typedef typename __alloc_traits::pointer               pointer;
829    typedef typename __alloc_traits::const_pointer         const_pointer;
830    typedef typename __alloc_traits::size_type             size_type;
831    typedef typename __alloc_traits::difference_type       difference_type;
832    typedef __map_iterator<typename __base::iterator>      iterator;
833    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
834    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
835    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
836
837    _LIBCPP_INLINE_VISIBILITY
838    explicit map(const key_compare& __comp = key_compare())
839        _NOEXCEPT_(
840            is_nothrow_default_constructible<allocator_type>::value &&
841            is_nothrow_default_constructible<key_compare>::value &&
842            is_nothrow_copy_constructible<key_compare>::value)
843        : __tree_(__vc(__comp)) {}
844
845    _LIBCPP_INLINE_VISIBILITY
846    explicit map(const key_compare& __comp, const allocator_type& __a)
847        : __tree_(__vc(__comp), __a) {}
848
849    template <class _InputIterator>
850    _LIBCPP_INLINE_VISIBILITY
851        map(_InputIterator __f, _InputIterator __l,
852            const key_compare& __comp = key_compare())
853        : __tree_(__vc(__comp))
854        {
855            insert(__f, __l);
856        }
857
858    template <class _InputIterator>
859    _LIBCPP_INLINE_VISIBILITY
860        map(_InputIterator __f, _InputIterator __l,
861            const key_compare& __comp, const allocator_type& __a)
862        : __tree_(__vc(__comp), __a)
863        {
864            insert(__f, __l);
865        }
866
867#if _LIBCPP_STD_VER > 11
868    template <class _InputIterator>
869    _LIBCPP_INLINE_VISIBILITY 
870    map(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
871        : map(__f, __l, key_compare(), __a) {}
872#endif
873
874    _LIBCPP_INLINE_VISIBILITY
875    map(const map& __m)
876        : __tree_(__m.__tree_)
877        {
878            insert(__m.begin(), __m.end());
879        }
880
881    _LIBCPP_INLINE_VISIBILITY
882    map& operator=(const map& __m)
883        {
884#if __cplusplus >= 201103L
885            __tree_ = __m.__tree_;
886#else
887            if (this != &__m) {
888                __tree_.clear();
889                __tree_.value_comp() = __m.__tree_.value_comp();
890                __tree_.__copy_assign_alloc(__m.__tree_);
891                insert(__m.begin(), __m.end());
892            }
893#endif
894            return *this;
895        }
896
897#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
898
899    _LIBCPP_INLINE_VISIBILITY
900    map(map&& __m)
901        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
902        : __tree_(_VSTD::move(__m.__tree_))
903        {
904        }
905
906    map(map&& __m, const allocator_type& __a);
907
908    _LIBCPP_INLINE_VISIBILITY
909    map& operator=(map&& __m)
910        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
911        {
912            __tree_ = _VSTD::move(__m.__tree_);
913            return *this;
914        }
915
916#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
917
918#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
919
920    _LIBCPP_INLINE_VISIBILITY
921    map(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
922        : __tree_(__vc(__comp))
923        {
924            insert(__il.begin(), __il.end());
925        }
926
927    _LIBCPP_INLINE_VISIBILITY
928    map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
929        : __tree_(__vc(__comp), __a)
930        {
931            insert(__il.begin(), __il.end());
932        }
933
934#if _LIBCPP_STD_VER > 11
935    _LIBCPP_INLINE_VISIBILITY 
936    map(initializer_list<value_type> __il, const allocator_type& __a)
937        : map(__il, key_compare(), __a) {}
938#endif
939
940    _LIBCPP_INLINE_VISIBILITY
941    map& operator=(initializer_list<value_type> __il)
942        {
943            __tree_.__assign_unique(__il.begin(), __il.end());
944            return *this;
945        }
946
947#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
948
949    _LIBCPP_INLINE_VISIBILITY
950    explicit map(const allocator_type& __a)
951        : __tree_(__a)
952        {
953        }
954
955    _LIBCPP_INLINE_VISIBILITY
956    map(const map& __m, const allocator_type& __a)
957        : __tree_(__m.__tree_.value_comp(), __a)
958        {
959            insert(__m.begin(), __m.end());
960        }
961
962    _LIBCPP_INLINE_VISIBILITY
963          iterator begin() _NOEXCEPT {return __tree_.begin();}
964    _LIBCPP_INLINE_VISIBILITY
965    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
966    _LIBCPP_INLINE_VISIBILITY
967          iterator end() _NOEXCEPT {return __tree_.end();}
968    _LIBCPP_INLINE_VISIBILITY
969    const_iterator end() const _NOEXCEPT {return __tree_.end();}
970
971    _LIBCPP_INLINE_VISIBILITY
972          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
973    _LIBCPP_INLINE_VISIBILITY
974    const_reverse_iterator rbegin() const _NOEXCEPT
975        {return const_reverse_iterator(end());}
976    _LIBCPP_INLINE_VISIBILITY
977          reverse_iterator rend() _NOEXCEPT
978            {return       reverse_iterator(begin());}
979    _LIBCPP_INLINE_VISIBILITY
980    const_reverse_iterator rend() const _NOEXCEPT
981        {return const_reverse_iterator(begin());}
982
983    _LIBCPP_INLINE_VISIBILITY
984    const_iterator cbegin() const _NOEXCEPT {return begin();}
985    _LIBCPP_INLINE_VISIBILITY
986    const_iterator cend() const _NOEXCEPT {return end();}
987    _LIBCPP_INLINE_VISIBILITY
988    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
989    _LIBCPP_INLINE_VISIBILITY
990    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
991
992    _LIBCPP_INLINE_VISIBILITY
993    bool      empty() const _NOEXCEPT {return __tree_.size() == 0;}
994    _LIBCPP_INLINE_VISIBILITY
995    size_type size() const _NOEXCEPT {return __tree_.size();}
996    _LIBCPP_INLINE_VISIBILITY
997    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
998
999    mapped_type& operator[](const key_type& __k);
1000#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1001    mapped_type& operator[](key_type&& __k);
1002#endif
1003
1004          mapped_type& at(const key_type& __k);
1005    const mapped_type& at(const key_type& __k) const;
1006
1007    _LIBCPP_INLINE_VISIBILITY
1008    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1009    _LIBCPP_INLINE_VISIBILITY
1010    key_compare    key_comp()      const {return __tree_.value_comp().key_comp();}
1011    _LIBCPP_INLINE_VISIBILITY
1012    value_compare  value_comp()    const {return value_compare(__tree_.value_comp().key_comp());}
1013
1014#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1015#ifndef _LIBCPP_HAS_NO_VARIADICS
1016
1017    template <class ..._Args>
1018        pair<iterator, bool>
1019        emplace(_Args&& ...__args);
1020
1021    template <class ..._Args>
1022        iterator
1023        emplace_hint(const_iterator __p, _Args&& ...__args);
1024
1025#endif  // _LIBCPP_HAS_NO_VARIADICS
1026
1027    template <class _Pp,
1028              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1029        _LIBCPP_INLINE_VISIBILITY
1030        pair<iterator, bool> insert(_Pp&& __p)
1031            {return __tree_.__insert_unique(_VSTD::forward<_Pp>(__p));}
1032
1033    template <class _Pp,
1034              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1035        _LIBCPP_INLINE_VISIBILITY
1036        iterator insert(const_iterator __pos, _Pp&& __p)
1037            {return __tree_.__insert_unique(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1038
1039#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1040
1041    _LIBCPP_INLINE_VISIBILITY
1042    pair<iterator, bool>
1043        insert(const value_type& __v) {return __tree_.__insert_unique(__v);}
1044
1045    _LIBCPP_INLINE_VISIBILITY
1046    iterator
1047        insert(const_iterator __p, const value_type& __v)
1048            {return __tree_.__insert_unique(__p.__i_, __v);}
1049
1050    template <class _InputIterator>
1051        _LIBCPP_INLINE_VISIBILITY
1052        void insert(_InputIterator __f, _InputIterator __l)
1053        {
1054            for (const_iterator __e = cend(); __f != __l; ++__f)
1055                insert(__e.__i_, *__f);
1056        }
1057
1058#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1059
1060    _LIBCPP_INLINE_VISIBILITY
1061    void insert(initializer_list<value_type> __il)
1062        {insert(__il.begin(), __il.end());}
1063
1064#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1065
1066    _LIBCPP_INLINE_VISIBILITY
1067    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1068    _LIBCPP_INLINE_VISIBILITY
1069    size_type erase(const key_type& __k)
1070        {return __tree_.__erase_unique(__k);}
1071    _LIBCPP_INLINE_VISIBILITY
1072    iterator  erase(const_iterator __f, const_iterator __l)
1073        {return __tree_.erase(__f.__i_, __l.__i_);}
1074    _LIBCPP_INLINE_VISIBILITY
1075    void clear() _NOEXCEPT {__tree_.clear();}
1076
1077    _LIBCPP_INLINE_VISIBILITY
1078    void swap(map& __m)
1079        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1080        {__tree_.swap(__m.__tree_);}
1081
1082    _LIBCPP_INLINE_VISIBILITY
1083    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1084    _LIBCPP_INLINE_VISIBILITY
1085    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1086#if _LIBCPP_STD_VER > 11
1087    template <typename _K2>
1088    _LIBCPP_INLINE_VISIBILITY
1089    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1090    find(const _K2& __k)                           {return __tree_.find(__k);}
1091    template <typename _K2>
1092    _LIBCPP_INLINE_VISIBILITY
1093    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1094    find(const _K2& __k) const                     {return __tree_.find(__k);}
1095#endif
1096
1097    _LIBCPP_INLINE_VISIBILITY
1098    size_type      count(const key_type& __k) const
1099        {return __tree_.__count_unique(__k);}
1100    _LIBCPP_INLINE_VISIBILITY
1101    iterator lower_bound(const key_type& __k)
1102        {return __tree_.lower_bound(__k);}
1103    _LIBCPP_INLINE_VISIBILITY
1104    const_iterator lower_bound(const key_type& __k) const
1105        {return __tree_.lower_bound(__k);}
1106#if _LIBCPP_STD_VER > 11
1107    template <typename _K2>
1108    _LIBCPP_INLINE_VISIBILITY
1109    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1110    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1111
1112    template <typename _K2>
1113    _LIBCPP_INLINE_VISIBILITY
1114    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1115    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1116#endif
1117
1118    _LIBCPP_INLINE_VISIBILITY
1119    iterator upper_bound(const key_type& __k)
1120        {return __tree_.upper_bound(__k);}
1121    _LIBCPP_INLINE_VISIBILITY
1122    const_iterator upper_bound(const key_type& __k) const
1123        {return __tree_.upper_bound(__k);}
1124#if _LIBCPP_STD_VER > 11
1125    template <typename _K2>
1126    _LIBCPP_INLINE_VISIBILITY
1127    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1128    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1129    template <typename _K2>
1130    _LIBCPP_INLINE_VISIBILITY
1131    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1132    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1133#endif
1134
1135    _LIBCPP_INLINE_VISIBILITY
1136    pair<iterator,iterator> equal_range(const key_type& __k)
1137        {return __tree_.__equal_range_unique(__k);}
1138    _LIBCPP_INLINE_VISIBILITY
1139    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1140        {return __tree_.__equal_range_unique(__k);}
1141#if _LIBCPP_STD_VER > 11
1142    template <typename _K2>
1143    _LIBCPP_INLINE_VISIBILITY
1144    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1145    equal_range(const _K2& __k)       {return __tree_.__equal_range_unique(__k);}
1146    template <typename _K2>
1147    _LIBCPP_INLINE_VISIBILITY
1148    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1149    equal_range(const _K2& __k) const {return __tree_.__equal_range_unique(__k);}
1150#endif
1151
1152private:
1153    typedef typename __base::__node                    __node;
1154    typedef typename __base::__node_allocator          __node_allocator;
1155    typedef typename __base::__node_pointer            __node_pointer;
1156    typedef typename __base::__node_const_pointer      __node_const_pointer;
1157    typedef typename __base::__node_base_pointer       __node_base_pointer;
1158    typedef typename __base::__node_base_const_pointer __node_base_const_pointer;
1159    typedef __map_node_destructor<__node_allocator> _Dp;
1160    typedef unique_ptr<__node, _Dp> __node_holder;
1161
1162#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1163    __node_holder __construct_node();
1164    template <class _A0>
1165        __node_holder __construct_node(_A0&& __a0);
1166    __node_holder __construct_node_with_key(key_type&& __k);
1167#ifndef _LIBCPP_HAS_NO_VARIADICS
1168    template <class _A0, class _A1, class ..._Args>
1169        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
1170#endif  // _LIBCPP_HAS_NO_VARIADICS
1171#endif
1172    __node_holder __construct_node_with_key(const key_type& __k);
1173
1174    __node_base_pointer&
1175        __find_equal_key(__node_base_pointer& __parent, const key_type& __k);
1176    __node_base_const_pointer
1177        __find_equal_key(__node_base_const_pointer& __parent, const key_type& __k) const;
1178};
1179
1180// Find place to insert if __k doesn't exist
1181// Set __parent to parent of null leaf
1182// Return reference to null leaf
1183// If __k exists, set parent to node of __k and return reference to node of __k
1184template <class _Key, class _Tp, class _Compare, class _Allocator>
1185typename map<_Key, _Tp, _Compare, _Allocator>::__node_base_pointer&
1186map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_pointer& __parent,
1187                                                       const key_type& __k)
1188{
1189    __node_pointer __nd = __tree_.__root();
1190    if (__nd != nullptr)
1191    {
1192        while (true)
1193        {
1194            if (__tree_.value_comp().key_comp()(__k, __nd->__value_.__cc.first))
1195            {
1196                if (__nd->__left_ != nullptr)
1197                    __nd = static_cast<__node_pointer>(__nd->__left_);
1198                else
1199                {
1200                    __parent = static_cast<__node_base_pointer>(__nd);
1201                    return __parent->__left_;
1202                }
1203            }
1204            else if (__tree_.value_comp().key_comp()(__nd->__value_.__cc.first, __k))
1205            {
1206                if (__nd->__right_ != nullptr)
1207                    __nd = static_cast<__node_pointer>(__nd->__right_);
1208                else
1209                {
1210                    __parent = static_cast<__node_base_pointer>(__nd);
1211                    return __parent->__right_;
1212                }
1213            }
1214            else
1215            {
1216                __parent = static_cast<__node_base_pointer>(__nd);
1217                return __parent;
1218            }
1219        }
1220    }
1221    __parent = static_cast<__node_base_pointer>(__tree_.__end_node());
1222    return __parent->__left_;
1223}
1224
1225// Find __k
1226// Set __parent to parent of null leaf and
1227//    return reference to null leaf iv __k does not exist.
1228// If __k exists, set parent to node of __k and return reference to node of __k
1229template <class _Key, class _Tp, class _Compare, class _Allocator>
1230typename map<_Key, _Tp, _Compare, _Allocator>::__node_base_const_pointer
1231map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_const_pointer& __parent,
1232                                                       const key_type& __k) const
1233{
1234    __node_const_pointer __nd = __tree_.__root();
1235    if (__nd != nullptr)
1236    {
1237        while (true)
1238        {
1239            if (__tree_.value_comp().key_comp()(__k, __nd->__value_.__cc.first))
1240            {
1241                if (__nd->__left_ != nullptr)
1242                    __nd = static_cast<__node_pointer>(__nd->__left_);
1243                else
1244                {
1245                    __parent = static_cast<__node_base_pointer>(__nd);
1246                    return const_cast<const __node_base_const_pointer&>(__parent->__left_);
1247                }
1248            }
1249            else if (__tree_.value_comp().key_comp()(__nd->__value_.__cc.first, __k))
1250            {
1251                if (__nd->__right_ != nullptr)
1252                    __nd = static_cast<__node_pointer>(__nd->__right_);
1253                else
1254                {
1255                    __parent = static_cast<__node_base_pointer>(__nd);
1256                    return const_cast<const __node_base_const_pointer&>(__parent->__right_);
1257                }
1258            }
1259            else
1260            {
1261                __parent = static_cast<__node_base_pointer>(__nd);
1262                return __parent;
1263            }
1264        }
1265    }
1266    __parent = static_cast<__node_base_pointer>(__tree_.__end_node());
1267    return const_cast<const __node_base_const_pointer&>(__parent->__left_);
1268}
1269
1270#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1271
1272template <class _Key, class _Tp, class _Compare, class _Allocator>
1273map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
1274    : __tree_(_VSTD::move(__m.__tree_), __a)
1275{
1276    if (__a != __m.get_allocator())
1277    {
1278        const_iterator __e = cend();
1279        while (!__m.empty())
1280            __tree_.__insert_unique(__e.__i_,
1281                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
1282    }
1283}
1284
1285template <class _Key, class _Tp, class _Compare, class _Allocator>
1286typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1287map<_Key, _Tp, _Compare, _Allocator>::__construct_node()
1288{
1289    __node_allocator& __na = __tree_.__node_alloc();
1290    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1291    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
1292    __h.get_deleter().__first_constructed = true;
1293    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1294    __h.get_deleter().__second_constructed = true;
1295    return __h;
1296}
1297
1298template <class _Key, class _Tp, class _Compare, class _Allocator>
1299template <class _A0>
1300typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1301map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
1302{
1303    __node_allocator& __na = __tree_.__node_alloc();
1304    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1305    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
1306    __h.get_deleter().__first_constructed = true;
1307    __h.get_deleter().__second_constructed = true;
1308    return __h;
1309}
1310
1311template <class _Key, class _Tp, class _Compare, class _Allocator>
1312typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1313map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(key_type&& __k)
1314{
1315    __node_allocator& __na = __tree_.__node_alloc();
1316    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1317    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), _VSTD::move(__k));
1318    __h.get_deleter().__first_constructed = true;
1319    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1320    __h.get_deleter().__second_constructed = true;
1321    return __h;
1322}
1323
1324#ifndef _LIBCPP_HAS_NO_VARIADICS
1325
1326template <class _Key, class _Tp, class _Compare, class _Allocator>
1327template <class _A0, class _A1, class ..._Args>
1328typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1329map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
1330{
1331    __node_allocator& __na = __tree_.__node_alloc();
1332    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1333    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
1334                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
1335                             _VSTD::forward<_Args>(__args)...);
1336    __h.get_deleter().__first_constructed = true;
1337    __h.get_deleter().__second_constructed = true;
1338    return __h;
1339}
1340
1341#endif  // _LIBCPP_HAS_NO_VARIADICS
1342
1343#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1344
1345template <class _Key, class _Tp, class _Compare, class _Allocator>
1346typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1347map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type& __k)
1348{
1349    __node_allocator& __na = __tree_.__node_alloc();
1350    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1351    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
1352    __h.get_deleter().__first_constructed = true;
1353    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1354    __h.get_deleter().__second_constructed = true;
1355    return _VSTD::move(__h);  // explicitly moved for C++03
1356}
1357
1358template <class _Key, class _Tp, class _Compare, class _Allocator>
1359_Tp&
1360map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
1361{
1362    __node_base_pointer __parent;
1363    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1364    __node_pointer __r = static_cast<__node_pointer>(__child);
1365    if (__child == nullptr)
1366    {
1367        __node_holder __h = __construct_node_with_key(__k);
1368        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1369        __r = __h.release();
1370    }
1371    return __r->__value_.__cc.second;
1372}
1373
1374#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1375
1376template <class _Key, class _Tp, class _Compare, class _Allocator>
1377_Tp&
1378map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k)
1379{
1380    __node_base_pointer __parent;
1381    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1382    __node_pointer __r = static_cast<__node_pointer>(__child);
1383    if (__child == nullptr)
1384    {
1385        __node_holder __h = __construct_node_with_key(_VSTD::move(__k));
1386        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1387        __r = __h.release();
1388    }
1389    return __r->__value_.__cc.second;
1390}
1391
1392#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1393
1394template <class _Key, class _Tp, class _Compare, class _Allocator>
1395_Tp&
1396map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k)
1397{
1398    __node_base_pointer __parent;
1399    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1400#ifndef _LIBCPP_NO_EXCEPTIONS
1401    if (__child == nullptr)
1402        throw out_of_range("map::at:  key not found");
1403#endif  // _LIBCPP_NO_EXCEPTIONS
1404    return static_cast<__node_pointer>(__child)->__value_.__cc.second;
1405}
1406
1407template <class _Key, class _Tp, class _Compare, class _Allocator>
1408const _Tp&
1409map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const
1410{
1411    __node_base_const_pointer __parent;
1412    __node_base_const_pointer __child = __find_equal_key(__parent, __k);
1413#ifndef _LIBCPP_NO_EXCEPTIONS
1414    if (__child == nullptr)
1415        throw out_of_range("map::at:  key not found");
1416#endif  // _LIBCPP_NO_EXCEPTIONS
1417    return static_cast<__node_const_pointer>(__child)->__value_.__cc.second;
1418}
1419
1420#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1421
1422template <class _Key, class _Tp, class _Compare, class _Allocator>
1423template <class ..._Args>
1424pair<typename map<_Key, _Tp, _Compare, _Allocator>::iterator, bool>
1425map<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
1426{
1427    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1428    pair<iterator, bool> __r = __tree_.__node_insert_unique(__h.get());
1429    if (__r.second)
1430        __h.release();
1431    return __r;
1432}
1433
1434template <class _Key, class _Tp, class _Compare, class _Allocator>
1435template <class ..._Args>
1436typename map<_Key, _Tp, _Compare, _Allocator>::iterator
1437map<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
1438                                                   _Args&& ...__args)
1439{
1440    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1441    iterator __r = __tree_.__node_insert_unique(__p.__i_, __h.get());
1442    if (__r.__i_.__ptr_ == __h.get())
1443        __h.release();
1444    return __r;
1445}
1446
1447#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1448
1449template <class _Key, class _Tp, class _Compare, class _Allocator>
1450inline _LIBCPP_INLINE_VISIBILITY
1451bool
1452operator==(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1453           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1454{
1455    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1456}
1457
1458template <class _Key, class _Tp, class _Compare, class _Allocator>
1459inline _LIBCPP_INLINE_VISIBILITY
1460bool
1461operator< (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1462           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1463{
1464    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1465}
1466
1467template <class _Key, class _Tp, class _Compare, class _Allocator>
1468inline _LIBCPP_INLINE_VISIBILITY
1469bool
1470operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1471           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1472{
1473    return !(__x == __y);
1474}
1475
1476template <class _Key, class _Tp, class _Compare, class _Allocator>
1477inline _LIBCPP_INLINE_VISIBILITY
1478bool
1479operator> (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1480           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1481{
1482    return __y < __x;
1483}
1484
1485template <class _Key, class _Tp, class _Compare, class _Allocator>
1486inline _LIBCPP_INLINE_VISIBILITY
1487bool
1488operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1489           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1490{
1491    return !(__x < __y);
1492}
1493
1494template <class _Key, class _Tp, class _Compare, class _Allocator>
1495inline _LIBCPP_INLINE_VISIBILITY
1496bool
1497operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1498           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1499{
1500    return !(__y < __x);
1501}
1502
1503template <class _Key, class _Tp, class _Compare, class _Allocator>
1504inline _LIBCPP_INLINE_VISIBILITY
1505void
1506swap(map<_Key, _Tp, _Compare, _Allocator>& __x,
1507     map<_Key, _Tp, _Compare, _Allocator>& __y)
1508    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
1509{
1510    __x.swap(__y);
1511}
1512
1513template <class _Key, class _Tp, class _Compare = less<_Key>,
1514          class _Allocator = allocator<pair<const _Key, _Tp> > >
1515class _LIBCPP_TYPE_VIS_ONLY multimap
1516{
1517public:
1518    // types:
1519    typedef _Key                                     key_type;
1520    typedef _Tp                                      mapped_type;
1521    typedef pair<const key_type, mapped_type>        value_type;
1522    typedef pair<key_type, mapped_type>              __nc_value_type;
1523    typedef _Compare                                 key_compare;
1524    typedef _Allocator                               allocator_type;
1525    typedef value_type&                              reference;
1526    typedef const value_type&                        const_reference;
1527
1528    class _LIBCPP_TYPE_VIS_ONLY value_compare
1529        : public binary_function<value_type, value_type, bool>
1530    {
1531        friend class multimap;
1532    protected:
1533        key_compare comp;
1534
1535        _LIBCPP_INLINE_VISIBILITY
1536        value_compare(key_compare c) : comp(c) {}
1537    public:
1538        _LIBCPP_INLINE_VISIBILITY
1539        bool operator()(const value_type& __x, const value_type& __y) const
1540            {return comp(__x.first, __y.first);}
1541    };
1542
1543private:
1544
1545    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
1546    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
1547    typedef typename allocator_traits<allocator_type>::template
1548#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
1549            rebind_alloc<__value_type>
1550#else
1551            rebind_alloc<__value_type>::other
1552#endif
1553                                                                    __allocator_type;
1554    typedef __tree<__value_type, __vc, __allocator_type>            __base;
1555    typedef typename __base::__node_traits                          __node_traits;
1556    typedef allocator_traits<allocator_type>                        __alloc_traits;
1557
1558    __base __tree_;
1559
1560public:
1561    typedef typename __alloc_traits::pointer               pointer;
1562    typedef typename __alloc_traits::const_pointer         const_pointer;
1563    typedef typename __alloc_traits::size_type             size_type;
1564    typedef typename __alloc_traits::difference_type       difference_type;
1565    typedef __map_iterator<typename __base::iterator>      iterator;
1566    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
1567    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
1568    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
1569
1570    _LIBCPP_INLINE_VISIBILITY
1571    explicit multimap(const key_compare& __comp = key_compare())
1572        _NOEXCEPT_(
1573            is_nothrow_default_constructible<allocator_type>::value &&
1574            is_nothrow_default_constructible<key_compare>::value &&
1575            is_nothrow_copy_constructible<key_compare>::value)
1576        : __tree_(__vc(__comp)) {}
1577
1578    _LIBCPP_INLINE_VISIBILITY
1579    explicit multimap(const key_compare& __comp, const allocator_type& __a)
1580        : __tree_(__vc(__comp), __a) {}
1581
1582    template <class _InputIterator>
1583        _LIBCPP_INLINE_VISIBILITY
1584        multimap(_InputIterator __f, _InputIterator __l,
1585            const key_compare& __comp = key_compare())
1586        : __tree_(__vc(__comp))
1587        {
1588            insert(__f, __l);
1589        }
1590
1591    template <class _InputIterator>
1592        _LIBCPP_INLINE_VISIBILITY
1593        multimap(_InputIterator __f, _InputIterator __l,
1594            const key_compare& __comp, const allocator_type& __a)
1595        : __tree_(__vc(__comp), __a)
1596        {
1597            insert(__f, __l);
1598        }
1599
1600#if _LIBCPP_STD_VER > 11
1601    template <class _InputIterator>
1602    _LIBCPP_INLINE_VISIBILITY 
1603    multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
1604        : multimap(__f, __l, key_compare(), __a) {}
1605#endif
1606
1607    _LIBCPP_INLINE_VISIBILITY
1608    multimap(const multimap& __m)
1609        : __tree_(__m.__tree_.value_comp(),
1610          __alloc_traits::select_on_container_copy_construction(__m.__tree_.__alloc()))
1611        {
1612            insert(__m.begin(), __m.end());
1613        }
1614
1615    _LIBCPP_INLINE_VISIBILITY
1616    multimap& operator=(const multimap& __m)
1617        {
1618#if __cplusplus >= 201103L
1619            __tree_ = __m.__tree_;
1620#else
1621            if (this != &__m) {
1622                __tree_.clear();
1623                __tree_.value_comp() = __m.__tree_.value_comp();
1624                __tree_.__copy_assign_alloc(__m.__tree_);
1625                insert(__m.begin(), __m.end());
1626            }
1627#endif
1628            return *this;
1629        }
1630
1631#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1632
1633    _LIBCPP_INLINE_VISIBILITY
1634    multimap(multimap&& __m)
1635        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
1636        : __tree_(_VSTD::move(__m.__tree_))
1637        {
1638        }
1639
1640    multimap(multimap&& __m, const allocator_type& __a);
1641
1642    _LIBCPP_INLINE_VISIBILITY
1643    multimap& operator=(multimap&& __m)
1644        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
1645        {
1646            __tree_ = _VSTD::move(__m.__tree_);
1647            return *this;
1648        }
1649
1650#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1651
1652#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1653
1654    _LIBCPP_INLINE_VISIBILITY
1655    multimap(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
1656        : __tree_(__vc(__comp))
1657        {
1658            insert(__il.begin(), __il.end());
1659        }
1660
1661    _LIBCPP_INLINE_VISIBILITY
1662    multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
1663        : __tree_(__vc(__comp), __a)
1664        {
1665            insert(__il.begin(), __il.end());
1666        }
1667
1668#if _LIBCPP_STD_VER > 11
1669    _LIBCPP_INLINE_VISIBILITY 
1670    multimap(initializer_list<value_type> __il, const allocator_type& __a)
1671        : multimap(__il, key_compare(), __a) {}
1672#endif
1673
1674    _LIBCPP_INLINE_VISIBILITY
1675    multimap& operator=(initializer_list<value_type> __il)
1676        {
1677            __tree_.__assign_multi(__il.begin(), __il.end());
1678            return *this;
1679        }
1680
1681#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1682
1683    _LIBCPP_INLINE_VISIBILITY
1684    explicit multimap(const allocator_type& __a)
1685        : __tree_(__a)
1686        {
1687        }
1688
1689    _LIBCPP_INLINE_VISIBILITY
1690    multimap(const multimap& __m, const allocator_type& __a)
1691        : __tree_(__m.__tree_.value_comp(), __a)
1692        {
1693            insert(__m.begin(), __m.end());
1694        }
1695
1696    _LIBCPP_INLINE_VISIBILITY
1697          iterator begin() _NOEXCEPT {return __tree_.begin();}
1698    _LIBCPP_INLINE_VISIBILITY
1699    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
1700    _LIBCPP_INLINE_VISIBILITY
1701          iterator end() _NOEXCEPT {return __tree_.end();}
1702    _LIBCPP_INLINE_VISIBILITY
1703    const_iterator end() const _NOEXCEPT {return __tree_.end();}
1704
1705    _LIBCPP_INLINE_VISIBILITY
1706          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1707    _LIBCPP_INLINE_VISIBILITY
1708    const_reverse_iterator rbegin() const _NOEXCEPT
1709        {return const_reverse_iterator(end());}
1710    _LIBCPP_INLINE_VISIBILITY
1711          reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
1712    _LIBCPP_INLINE_VISIBILITY
1713    const_reverse_iterator rend() const _NOEXCEPT
1714        {return const_reverse_iterator(begin());}
1715
1716    _LIBCPP_INLINE_VISIBILITY
1717    const_iterator cbegin()  const _NOEXCEPT {return begin();}
1718    _LIBCPP_INLINE_VISIBILITY
1719    const_iterator cend() const _NOEXCEPT {return end();}
1720    _LIBCPP_INLINE_VISIBILITY
1721    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1722    _LIBCPP_INLINE_VISIBILITY
1723    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1724
1725    _LIBCPP_INLINE_VISIBILITY
1726    bool empty() const _NOEXCEPT {return __tree_.size() == 0;}
1727    _LIBCPP_INLINE_VISIBILITY
1728    size_type size() const _NOEXCEPT {return __tree_.size();}
1729    _LIBCPP_INLINE_VISIBILITY
1730    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1731
1732    _LIBCPP_INLINE_VISIBILITY
1733    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1734    _LIBCPP_INLINE_VISIBILITY
1735    key_compare    key_comp() const {return __tree_.value_comp().key_comp();}
1736    _LIBCPP_INLINE_VISIBILITY
1737    value_compare  value_comp() const
1738        {return value_compare(__tree_.value_comp().key_comp());}
1739
1740#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1741#ifndef _LIBCPP_HAS_NO_VARIADICS
1742
1743    template <class ..._Args>
1744        iterator
1745        emplace(_Args&& ...__args);
1746
1747    template <class ..._Args>
1748        iterator
1749        emplace_hint(const_iterator __p, _Args&& ...__args);
1750
1751#endif  // _LIBCPP_HAS_NO_VARIADICS
1752
1753    template <class _Pp,
1754              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1755        _LIBCPP_INLINE_VISIBILITY
1756        iterator insert(_Pp&& __p)
1757            {return __tree_.__insert_multi(_VSTD::forward<_Pp>(__p));}
1758
1759    template <class _Pp,
1760              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1761        _LIBCPP_INLINE_VISIBILITY
1762        iterator insert(const_iterator __pos, _Pp&& __p)
1763            {return __tree_.__insert_multi(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1764
1765#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1766
1767    _LIBCPP_INLINE_VISIBILITY
1768    iterator insert(const value_type& __v) {return __tree_.__insert_multi(__v);}
1769
1770    _LIBCPP_INLINE_VISIBILITY
1771    iterator insert(const_iterator __p, const value_type& __v)
1772            {return __tree_.__insert_multi(__p.__i_, __v);}
1773
1774    template <class _InputIterator>
1775        _LIBCPP_INLINE_VISIBILITY
1776        void insert(_InputIterator __f, _InputIterator __l)
1777        {
1778            for (const_iterator __e = cend(); __f != __l; ++__f)
1779                __tree_.__insert_multi(__e.__i_, *__f);
1780        }
1781
1782#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1783
1784    _LIBCPP_INLINE_VISIBILITY
1785    void insert(initializer_list<value_type> __il)
1786        {insert(__il.begin(), __il.end());}
1787
1788#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1789
1790    _LIBCPP_INLINE_VISIBILITY
1791    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1792    _LIBCPP_INLINE_VISIBILITY
1793    size_type erase(const key_type& __k) {return __tree_.__erase_multi(__k);}
1794    _LIBCPP_INLINE_VISIBILITY
1795    iterator  erase(const_iterator __f, const_iterator __l)
1796        {return __tree_.erase(__f.__i_, __l.__i_);}
1797    _LIBCPP_INLINE_VISIBILITY
1798    void clear() {__tree_.clear();}
1799
1800    _LIBCPP_INLINE_VISIBILITY
1801    void swap(multimap& __m)
1802        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1803        {__tree_.swap(__m.__tree_);}
1804
1805    _LIBCPP_INLINE_VISIBILITY
1806    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1807    _LIBCPP_INLINE_VISIBILITY
1808    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1809#if _LIBCPP_STD_VER > 11
1810    template <typename _K2>
1811    _LIBCPP_INLINE_VISIBILITY
1812    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1813    find(const _K2& __k)                           {return __tree_.find(__k);}
1814    template <typename _K2>
1815    _LIBCPP_INLINE_VISIBILITY
1816    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1817    find(const _K2& __k) const                     {return __tree_.find(__k);}
1818#endif
1819
1820    _LIBCPP_INLINE_VISIBILITY
1821    size_type      count(const key_type& __k) const
1822        {return __tree_.__count_multi(__k);}
1823    _LIBCPP_INLINE_VISIBILITY
1824    iterator lower_bound(const key_type& __k)
1825        {return __tree_.lower_bound(__k);}
1826    _LIBCPP_INLINE_VISIBILITY
1827    const_iterator lower_bound(const key_type& __k) const
1828            {return __tree_.lower_bound(__k);}
1829#if _LIBCPP_STD_VER > 11
1830    template <typename _K2>
1831    _LIBCPP_INLINE_VISIBILITY
1832    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1833    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1834
1835    template <typename _K2>
1836    _LIBCPP_INLINE_VISIBILITY
1837    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1838    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1839#endif
1840
1841    _LIBCPP_INLINE_VISIBILITY
1842    iterator upper_bound(const key_type& __k)
1843            {return __tree_.upper_bound(__k);}
1844    _LIBCPP_INLINE_VISIBILITY
1845    const_iterator upper_bound(const key_type& __k) const
1846            {return __tree_.upper_bound(__k);}
1847#if _LIBCPP_STD_VER > 11
1848    template <typename _K2>
1849    _LIBCPP_INLINE_VISIBILITY
1850    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1851    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1852    template <typename _K2>
1853    _LIBCPP_INLINE_VISIBILITY
1854    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1855    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1856#endif
1857
1858    _LIBCPP_INLINE_VISIBILITY
1859    pair<iterator,iterator>             equal_range(const key_type& __k)
1860            {return __tree_.__equal_range_multi(__k);}
1861    _LIBCPP_INLINE_VISIBILITY
1862    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1863            {return __tree_.__equal_range_multi(__k);}
1864#if _LIBCPP_STD_VER > 11
1865    template <typename _K2>
1866    _LIBCPP_INLINE_VISIBILITY
1867    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1868    equal_range(const _K2& __k)       {return __tree_.__equal_range_multi(__k);}
1869    template <typename _K2>
1870    _LIBCPP_INLINE_VISIBILITY
1871    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1872    equal_range(const _K2& __k) const {return __tree_.__equal_range_multi(__k);}
1873#endif
1874
1875private:
1876    typedef typename __base::__node                    __node;
1877    typedef typename __base::__node_allocator          __node_allocator;
1878    typedef typename __base::__node_pointer            __node_pointer;
1879    typedef typename __base::__node_const_pointer      __node_const_pointer;
1880    typedef __map_node_destructor<__node_allocator> _Dp;
1881    typedef unique_ptr<__node, _Dp> __node_holder;
1882
1883#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1884    __node_holder __construct_node();
1885    template <class _A0>
1886        __node_holder
1887         __construct_node(_A0&& __a0);
1888#ifndef _LIBCPP_HAS_NO_VARIADICS
1889    template <class _A0, class _A1, class ..._Args>
1890        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
1891#endif  // _LIBCPP_HAS_NO_VARIADICS
1892#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1893};
1894
1895#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1896
1897template <class _Key, class _Tp, class _Compare, class _Allocator>
1898multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a)
1899    : __tree_(_VSTD::move(__m.__tree_), __a)
1900{
1901    if (__a != __m.get_allocator())
1902    {
1903        const_iterator __e = cend();
1904        while (!__m.empty())
1905            __tree_.__insert_multi(__e.__i_,
1906                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
1907    }
1908}
1909
1910template <class _Key, class _Tp, class _Compare, class _Allocator>
1911typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1912multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node()
1913{
1914    __node_allocator& __na = __tree_.__node_alloc();
1915    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1916    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
1917    __h.get_deleter().__first_constructed = true;
1918    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1919    __h.get_deleter().__second_constructed = true;
1920    return __h;
1921}
1922
1923template <class _Key, class _Tp, class _Compare, class _Allocator>
1924template <class _A0>
1925typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1926multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
1927{
1928    __node_allocator& __na = __tree_.__node_alloc();
1929    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1930    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
1931    __h.get_deleter().__first_constructed = true;
1932    __h.get_deleter().__second_constructed = true;
1933    return __h;
1934}
1935
1936#ifndef _LIBCPP_HAS_NO_VARIADICS
1937
1938template <class _Key, class _Tp, class _Compare, class _Allocator>
1939template <class _A0, class _A1, class ..._Args>
1940typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1941multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
1942{
1943    __node_allocator& __na = __tree_.__node_alloc();
1944    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1945    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
1946                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
1947                             _VSTD::forward<_Args>(__args)...);
1948    __h.get_deleter().__first_constructed = true;
1949    __h.get_deleter().__second_constructed = true;
1950    return __h;
1951}
1952
1953#endif  // _LIBCPP_HAS_NO_VARIADICS
1954#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1955
1956#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1957
1958template <class _Key, class _Tp, class _Compare, class _Allocator>
1959template <class ..._Args>
1960typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
1961multimap<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
1962{
1963    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1964    iterator __r = __tree_.__node_insert_multi(__h.get());
1965    __h.release();
1966    return __r;
1967}
1968
1969template <class _Key, class _Tp, class _Compare, class _Allocator>
1970template <class ..._Args>
1971typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
1972multimap<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
1973                                                        _Args&& ...__args)
1974{
1975    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1976    iterator __r = __tree_.__node_insert_multi(__p.__i_, __h.get());
1977    __h.release();
1978    return __r;
1979}
1980
1981#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1982
1983template <class _Key, class _Tp, class _Compare, class _Allocator>
1984inline _LIBCPP_INLINE_VISIBILITY
1985bool
1986operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1987           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1988{
1989    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1990}
1991
1992template <class _Key, class _Tp, class _Compare, class _Allocator>
1993inline _LIBCPP_INLINE_VISIBILITY
1994bool
1995operator< (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1996           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1997{
1998    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1999}
2000
2001template <class _Key, class _Tp, class _Compare, class _Allocator>
2002inline _LIBCPP_INLINE_VISIBILITY
2003bool
2004operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2005           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2006{
2007    return !(__x == __y);
2008}
2009
2010template <class _Key, class _Tp, class _Compare, class _Allocator>
2011inline _LIBCPP_INLINE_VISIBILITY
2012bool
2013operator> (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2014           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2015{
2016    return __y < __x;
2017}
2018
2019template <class _Key, class _Tp, class _Compare, class _Allocator>
2020inline _LIBCPP_INLINE_VISIBILITY
2021bool
2022operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2023           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2024{
2025    return !(__x < __y);
2026}
2027
2028template <class _Key, class _Tp, class _Compare, class _Allocator>
2029inline _LIBCPP_INLINE_VISIBILITY
2030bool
2031operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2032           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2033{
2034    return !(__y < __x);
2035}
2036
2037template <class _Key, class _Tp, class _Compare, class _Allocator>
2038inline _LIBCPP_INLINE_VISIBILITY
2039void
2040swap(multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2041     multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2042    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
2043{
2044    __x.swap(__y);
2045}
2046
2047_LIBCPP_END_NAMESPACE_STD
2048
2049#endif  // _LIBCPP_MAP
2050