map revision 278724
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;        // C++14
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;        // C++14
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    map()
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(key_compare())) {}
844
845    _LIBCPP_INLINE_VISIBILITY
846    explicit map(const key_compare& __comp)
847        _NOEXCEPT_(
848            is_nothrow_default_constructible<allocator_type>::value &&
849            is_nothrow_copy_constructible<key_compare>::value)
850        : __tree_(__vc(__comp)) {}
851
852    _LIBCPP_INLINE_VISIBILITY
853    explicit map(const key_compare& __comp, const allocator_type& __a)
854        : __tree_(__vc(__comp), __a) {}
855
856    template <class _InputIterator>
857    _LIBCPP_INLINE_VISIBILITY
858        map(_InputIterator __f, _InputIterator __l,
859            const key_compare& __comp = key_compare())
860        : __tree_(__vc(__comp))
861        {
862            insert(__f, __l);
863        }
864
865    template <class _InputIterator>
866    _LIBCPP_INLINE_VISIBILITY
867        map(_InputIterator __f, _InputIterator __l,
868            const key_compare& __comp, const allocator_type& __a)
869        : __tree_(__vc(__comp), __a)
870        {
871            insert(__f, __l);
872        }
873
874#if _LIBCPP_STD_VER > 11
875    template <class _InputIterator>
876    _LIBCPP_INLINE_VISIBILITY 
877    map(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
878        : map(__f, __l, key_compare(), __a) {}
879#endif
880
881    _LIBCPP_INLINE_VISIBILITY
882    map(const map& __m)
883        : __tree_(__m.__tree_)
884        {
885            insert(__m.begin(), __m.end());
886        }
887
888    _LIBCPP_INLINE_VISIBILITY
889    map& operator=(const map& __m)
890        {
891#if __cplusplus >= 201103L
892            __tree_ = __m.__tree_;
893#else
894            if (this != &__m) {
895                __tree_.clear();
896                __tree_.value_comp() = __m.__tree_.value_comp();
897                __tree_.__copy_assign_alloc(__m.__tree_);
898                insert(__m.begin(), __m.end());
899            }
900#endif
901            return *this;
902        }
903
904#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
905
906    _LIBCPP_INLINE_VISIBILITY
907    map(map&& __m)
908        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
909        : __tree_(_VSTD::move(__m.__tree_))
910        {
911        }
912
913    map(map&& __m, const allocator_type& __a);
914
915    _LIBCPP_INLINE_VISIBILITY
916    map& operator=(map&& __m)
917        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
918        {
919            __tree_ = _VSTD::move(__m.__tree_);
920            return *this;
921        }
922
923#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
924
925#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
926
927    _LIBCPP_INLINE_VISIBILITY
928    map(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
929        : __tree_(__vc(__comp))
930        {
931            insert(__il.begin(), __il.end());
932        }
933
934    _LIBCPP_INLINE_VISIBILITY
935    map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
936        : __tree_(__vc(__comp), __a)
937        {
938            insert(__il.begin(), __il.end());
939        }
940
941#if _LIBCPP_STD_VER > 11
942    _LIBCPP_INLINE_VISIBILITY 
943    map(initializer_list<value_type> __il, const allocator_type& __a)
944        : map(__il, key_compare(), __a) {}
945#endif
946
947    _LIBCPP_INLINE_VISIBILITY
948    map& operator=(initializer_list<value_type> __il)
949        {
950            __tree_.__assign_unique(__il.begin(), __il.end());
951            return *this;
952        }
953
954#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
955
956    _LIBCPP_INLINE_VISIBILITY
957    explicit map(const allocator_type& __a)
958        : __tree_(__a)
959        {
960        }
961
962    _LIBCPP_INLINE_VISIBILITY
963    map(const map& __m, const allocator_type& __a)
964        : __tree_(__m.__tree_.value_comp(), __a)
965        {
966            insert(__m.begin(), __m.end());
967        }
968
969    _LIBCPP_INLINE_VISIBILITY
970          iterator begin() _NOEXCEPT {return __tree_.begin();}
971    _LIBCPP_INLINE_VISIBILITY
972    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
973    _LIBCPP_INLINE_VISIBILITY
974          iterator end() _NOEXCEPT {return __tree_.end();}
975    _LIBCPP_INLINE_VISIBILITY
976    const_iterator end() const _NOEXCEPT {return __tree_.end();}
977
978    _LIBCPP_INLINE_VISIBILITY
979          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
980    _LIBCPP_INLINE_VISIBILITY
981    const_reverse_iterator rbegin() const _NOEXCEPT
982        {return const_reverse_iterator(end());}
983    _LIBCPP_INLINE_VISIBILITY
984          reverse_iterator rend() _NOEXCEPT
985            {return       reverse_iterator(begin());}
986    _LIBCPP_INLINE_VISIBILITY
987    const_reverse_iterator rend() const _NOEXCEPT
988        {return const_reverse_iterator(begin());}
989
990    _LIBCPP_INLINE_VISIBILITY
991    const_iterator cbegin() const _NOEXCEPT {return begin();}
992    _LIBCPP_INLINE_VISIBILITY
993    const_iterator cend() const _NOEXCEPT {return end();}
994    _LIBCPP_INLINE_VISIBILITY
995    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
996    _LIBCPP_INLINE_VISIBILITY
997    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
998
999    _LIBCPP_INLINE_VISIBILITY
1000    bool      empty() const _NOEXCEPT {return __tree_.size() == 0;}
1001    _LIBCPP_INLINE_VISIBILITY
1002    size_type size() const _NOEXCEPT {return __tree_.size();}
1003    _LIBCPP_INLINE_VISIBILITY
1004    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1005
1006    mapped_type& operator[](const key_type& __k);
1007#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1008    mapped_type& operator[](key_type&& __k);
1009#endif
1010
1011          mapped_type& at(const key_type& __k);
1012    const mapped_type& at(const key_type& __k) const;
1013
1014    _LIBCPP_INLINE_VISIBILITY
1015    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1016    _LIBCPP_INLINE_VISIBILITY
1017    key_compare    key_comp()      const {return __tree_.value_comp().key_comp();}
1018    _LIBCPP_INLINE_VISIBILITY
1019    value_compare  value_comp()    const {return value_compare(__tree_.value_comp().key_comp());}
1020
1021#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1022#ifndef _LIBCPP_HAS_NO_VARIADICS
1023
1024    template <class ..._Args>
1025        pair<iterator, bool>
1026        emplace(_Args&& ...__args);
1027
1028    template <class ..._Args>
1029        iterator
1030        emplace_hint(const_iterator __p, _Args&& ...__args);
1031
1032#endif  // _LIBCPP_HAS_NO_VARIADICS
1033
1034    template <class _Pp,
1035              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1036        _LIBCPP_INLINE_VISIBILITY
1037        pair<iterator, bool> insert(_Pp&& __p)
1038            {return __tree_.__insert_unique(_VSTD::forward<_Pp>(__p));}
1039
1040    template <class _Pp,
1041              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1042        _LIBCPP_INLINE_VISIBILITY
1043        iterator insert(const_iterator __pos, _Pp&& __p)
1044            {return __tree_.__insert_unique(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1045
1046#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1047
1048    _LIBCPP_INLINE_VISIBILITY
1049    pair<iterator, bool>
1050        insert(const value_type& __v) {return __tree_.__insert_unique(__v);}
1051
1052    _LIBCPP_INLINE_VISIBILITY
1053    iterator
1054        insert(const_iterator __p, const value_type& __v)
1055            {return __tree_.__insert_unique(__p.__i_, __v);}
1056
1057    template <class _InputIterator>
1058        _LIBCPP_INLINE_VISIBILITY
1059        void insert(_InputIterator __f, _InputIterator __l)
1060        {
1061            for (const_iterator __e = cend(); __f != __l; ++__f)
1062                insert(__e.__i_, *__f);
1063        }
1064
1065#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1066
1067    _LIBCPP_INLINE_VISIBILITY
1068    void insert(initializer_list<value_type> __il)
1069        {insert(__il.begin(), __il.end());}
1070
1071#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1072
1073    _LIBCPP_INLINE_VISIBILITY
1074    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1075    _LIBCPP_INLINE_VISIBILITY
1076    size_type erase(const key_type& __k)
1077        {return __tree_.__erase_unique(__k);}
1078    _LIBCPP_INLINE_VISIBILITY
1079    iterator  erase(const_iterator __f, const_iterator __l)
1080        {return __tree_.erase(__f.__i_, __l.__i_);}
1081    _LIBCPP_INLINE_VISIBILITY
1082    void clear() _NOEXCEPT {__tree_.clear();}
1083
1084    _LIBCPP_INLINE_VISIBILITY
1085    void swap(map& __m)
1086        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1087        {__tree_.swap(__m.__tree_);}
1088
1089    _LIBCPP_INLINE_VISIBILITY
1090    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1091    _LIBCPP_INLINE_VISIBILITY
1092    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1093#if _LIBCPP_STD_VER > 11
1094    template <typename _K2>
1095    _LIBCPP_INLINE_VISIBILITY
1096    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1097    find(const _K2& __k)                           {return __tree_.find(__k);}
1098    template <typename _K2>
1099    _LIBCPP_INLINE_VISIBILITY
1100    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1101    find(const _K2& __k) const                     {return __tree_.find(__k);}
1102#endif
1103
1104    _LIBCPP_INLINE_VISIBILITY
1105    size_type      count(const key_type& __k) const
1106        {return __tree_.__count_unique(__k);}
1107#if _LIBCPP_STD_VER > 11
1108    template <typename _K2>
1109    _LIBCPP_INLINE_VISIBILITY
1110    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1111    count(const _K2& __k)                  {return __tree_.__count_unique(__k);}
1112#endif
1113    _LIBCPP_INLINE_VISIBILITY
1114    iterator lower_bound(const key_type& __k)
1115        {return __tree_.lower_bound(__k);}
1116    _LIBCPP_INLINE_VISIBILITY
1117    const_iterator lower_bound(const key_type& __k) const
1118        {return __tree_.lower_bound(__k);}
1119#if _LIBCPP_STD_VER > 11
1120    template <typename _K2>
1121    _LIBCPP_INLINE_VISIBILITY
1122    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1123    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1124
1125    template <typename _K2>
1126    _LIBCPP_INLINE_VISIBILITY
1127    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1128    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1129#endif
1130
1131    _LIBCPP_INLINE_VISIBILITY
1132    iterator upper_bound(const key_type& __k)
1133        {return __tree_.upper_bound(__k);}
1134    _LIBCPP_INLINE_VISIBILITY
1135    const_iterator upper_bound(const key_type& __k) const
1136        {return __tree_.upper_bound(__k);}
1137#if _LIBCPP_STD_VER > 11
1138    template <typename _K2>
1139    _LIBCPP_INLINE_VISIBILITY
1140    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1141    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1142    template <typename _K2>
1143    _LIBCPP_INLINE_VISIBILITY
1144    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1145    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1146#endif
1147
1148    _LIBCPP_INLINE_VISIBILITY
1149    pair<iterator,iterator> equal_range(const key_type& __k)
1150        {return __tree_.__equal_range_unique(__k);}
1151    _LIBCPP_INLINE_VISIBILITY
1152    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1153        {return __tree_.__equal_range_unique(__k);}
1154#if _LIBCPP_STD_VER > 11
1155    template <typename _K2>
1156    _LIBCPP_INLINE_VISIBILITY
1157    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1158    equal_range(const _K2& __k)       {return __tree_.__equal_range_unique(__k);}
1159    template <typename _K2>
1160    _LIBCPP_INLINE_VISIBILITY
1161    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1162    equal_range(const _K2& __k) const {return __tree_.__equal_range_unique(__k);}
1163#endif
1164
1165private:
1166    typedef typename __base::__node                    __node;
1167    typedef typename __base::__node_allocator          __node_allocator;
1168    typedef typename __base::__node_pointer            __node_pointer;
1169    typedef typename __base::__node_const_pointer      __node_const_pointer;
1170    typedef typename __base::__node_base_pointer       __node_base_pointer;
1171    typedef typename __base::__node_base_const_pointer __node_base_const_pointer;
1172    typedef __map_node_destructor<__node_allocator> _Dp;
1173    typedef unique_ptr<__node, _Dp> __node_holder;
1174
1175#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1176    __node_holder __construct_node();
1177    template <class _A0>
1178        __node_holder __construct_node(_A0&& __a0);
1179    __node_holder __construct_node_with_key(key_type&& __k);
1180#ifndef _LIBCPP_HAS_NO_VARIADICS
1181    template <class _A0, class _A1, class ..._Args>
1182        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
1183#endif  // _LIBCPP_HAS_NO_VARIADICS
1184#endif
1185    __node_holder __construct_node_with_key(const key_type& __k);
1186
1187    __node_base_pointer&
1188        __find_equal_key(__node_base_pointer& __parent, const key_type& __k);
1189    __node_base_const_pointer
1190        __find_equal_key(__node_base_const_pointer& __parent, const key_type& __k) const;
1191};
1192
1193// Find place to insert if __k doesn't exist
1194// Set __parent to parent of null leaf
1195// Return reference to null leaf
1196// If __k exists, set parent to node of __k and return reference to node of __k
1197template <class _Key, class _Tp, class _Compare, class _Allocator>
1198typename map<_Key, _Tp, _Compare, _Allocator>::__node_base_pointer&
1199map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_pointer& __parent,
1200                                                       const key_type& __k)
1201{
1202    __node_pointer __nd = __tree_.__root();
1203    if (__nd != nullptr)
1204    {
1205        while (true)
1206        {
1207            if (__tree_.value_comp().key_comp()(__k, __nd->__value_.__cc.first))
1208            {
1209                if (__nd->__left_ != nullptr)
1210                    __nd = static_cast<__node_pointer>(__nd->__left_);
1211                else
1212                {
1213                    __parent = static_cast<__node_base_pointer>(__nd);
1214                    return __parent->__left_;
1215                }
1216            }
1217            else if (__tree_.value_comp().key_comp()(__nd->__value_.__cc.first, __k))
1218            {
1219                if (__nd->__right_ != nullptr)
1220                    __nd = static_cast<__node_pointer>(__nd->__right_);
1221                else
1222                {
1223                    __parent = static_cast<__node_base_pointer>(__nd);
1224                    return __parent->__right_;
1225                }
1226            }
1227            else
1228            {
1229                __parent = static_cast<__node_base_pointer>(__nd);
1230                return __parent;
1231            }
1232        }
1233    }
1234    __parent = static_cast<__node_base_pointer>(__tree_.__end_node());
1235    return __parent->__left_;
1236}
1237
1238// Find __k
1239// Set __parent to parent of null leaf and
1240//    return reference to null leaf iv __k does not exist.
1241// If __k exists, set parent to node of __k and return reference to node of __k
1242template <class _Key, class _Tp, class _Compare, class _Allocator>
1243typename map<_Key, _Tp, _Compare, _Allocator>::__node_base_const_pointer
1244map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_const_pointer& __parent,
1245                                                       const key_type& __k) const
1246{
1247    __node_const_pointer __nd = __tree_.__root();
1248    if (__nd != nullptr)
1249    {
1250        while (true)
1251        {
1252            if (__tree_.value_comp().key_comp()(__k, __nd->__value_.__cc.first))
1253            {
1254                if (__nd->__left_ != nullptr)
1255                    __nd = static_cast<__node_pointer>(__nd->__left_);
1256                else
1257                {
1258                    __parent = static_cast<__node_base_pointer>(__nd);
1259                    return const_cast<const __node_base_const_pointer&>(__parent->__left_);
1260                }
1261            }
1262            else if (__tree_.value_comp().key_comp()(__nd->__value_.__cc.first, __k))
1263            {
1264                if (__nd->__right_ != nullptr)
1265                    __nd = static_cast<__node_pointer>(__nd->__right_);
1266                else
1267                {
1268                    __parent = static_cast<__node_base_pointer>(__nd);
1269                    return const_cast<const __node_base_const_pointer&>(__parent->__right_);
1270                }
1271            }
1272            else
1273            {
1274                __parent = static_cast<__node_base_pointer>(__nd);
1275                return __parent;
1276            }
1277        }
1278    }
1279    __parent = static_cast<__node_base_pointer>(__tree_.__end_node());
1280    return const_cast<const __node_base_const_pointer&>(__parent->__left_);
1281}
1282
1283#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1284
1285template <class _Key, class _Tp, class _Compare, class _Allocator>
1286map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
1287    : __tree_(_VSTD::move(__m.__tree_), __a)
1288{
1289    if (__a != __m.get_allocator())
1290    {
1291        const_iterator __e = cend();
1292        while (!__m.empty())
1293            __tree_.__insert_unique(__e.__i_,
1294                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
1295    }
1296}
1297
1298template <class _Key, class _Tp, class _Compare, class _Allocator>
1299typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1300map<_Key, _Tp, _Compare, _Allocator>::__construct_node()
1301{
1302    __node_allocator& __na = __tree_.__node_alloc();
1303    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1304    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
1305    __h.get_deleter().__first_constructed = true;
1306    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1307    __h.get_deleter().__second_constructed = true;
1308    return __h;
1309}
1310
1311template <class _Key, class _Tp, class _Compare, class _Allocator>
1312template <class _A0>
1313typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1314map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
1315{
1316    __node_allocator& __na = __tree_.__node_alloc();
1317    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1318    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
1319    __h.get_deleter().__first_constructed = true;
1320    __h.get_deleter().__second_constructed = true;
1321    return __h;
1322}
1323
1324template <class _Key, class _Tp, class _Compare, class _Allocator>
1325typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1326map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(key_type&& __k)
1327{
1328    __node_allocator& __na = __tree_.__node_alloc();
1329    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1330    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), _VSTD::move(__k));
1331    __h.get_deleter().__first_constructed = true;
1332    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1333    __h.get_deleter().__second_constructed = true;
1334    return __h;
1335}
1336
1337#ifndef _LIBCPP_HAS_NO_VARIADICS
1338
1339template <class _Key, class _Tp, class _Compare, class _Allocator>
1340template <class _A0, class _A1, class ..._Args>
1341typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1342map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
1343{
1344    __node_allocator& __na = __tree_.__node_alloc();
1345    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1346    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
1347                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
1348                             _VSTD::forward<_Args>(__args)...);
1349    __h.get_deleter().__first_constructed = true;
1350    __h.get_deleter().__second_constructed = true;
1351    return __h;
1352}
1353
1354#endif  // _LIBCPP_HAS_NO_VARIADICS
1355
1356#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1357
1358template <class _Key, class _Tp, class _Compare, class _Allocator>
1359typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1360map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type& __k)
1361{
1362    __node_allocator& __na = __tree_.__node_alloc();
1363    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1364    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
1365    __h.get_deleter().__first_constructed = true;
1366    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1367    __h.get_deleter().__second_constructed = true;
1368    return _VSTD::move(__h);  // explicitly moved for C++03
1369}
1370
1371template <class _Key, class _Tp, class _Compare, class _Allocator>
1372_Tp&
1373map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
1374{
1375    __node_base_pointer __parent;
1376    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1377    __node_pointer __r = static_cast<__node_pointer>(__child);
1378    if (__child == nullptr)
1379    {
1380        __node_holder __h = __construct_node_with_key(__k);
1381        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1382        __r = __h.release();
1383    }
1384    return __r->__value_.__cc.second;
1385}
1386
1387#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1388
1389template <class _Key, class _Tp, class _Compare, class _Allocator>
1390_Tp&
1391map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k)
1392{
1393    __node_base_pointer __parent;
1394    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1395    __node_pointer __r = static_cast<__node_pointer>(__child);
1396    if (__child == nullptr)
1397    {
1398        __node_holder __h = __construct_node_with_key(_VSTD::move(__k));
1399        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1400        __r = __h.release();
1401    }
1402    return __r->__value_.__cc.second;
1403}
1404
1405#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1406
1407template <class _Key, class _Tp, class _Compare, class _Allocator>
1408_Tp&
1409map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k)
1410{
1411    __node_base_pointer __parent;
1412    __node_base_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_pointer>(__child)->__value_.__cc.second;
1418}
1419
1420template <class _Key, class _Tp, class _Compare, class _Allocator>
1421const _Tp&
1422map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const
1423{
1424    __node_base_const_pointer __parent;
1425    __node_base_const_pointer __child = __find_equal_key(__parent, __k);
1426#ifndef _LIBCPP_NO_EXCEPTIONS
1427    if (__child == nullptr)
1428        throw out_of_range("map::at:  key not found");
1429#endif  // _LIBCPP_NO_EXCEPTIONS
1430    return static_cast<__node_const_pointer>(__child)->__value_.__cc.second;
1431}
1432
1433#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1434
1435template <class _Key, class _Tp, class _Compare, class _Allocator>
1436template <class ..._Args>
1437pair<typename map<_Key, _Tp, _Compare, _Allocator>::iterator, bool>
1438map<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
1439{
1440    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1441    pair<iterator, bool> __r = __tree_.__node_insert_unique(__h.get());
1442    if (__r.second)
1443        __h.release();
1444    return __r;
1445}
1446
1447template <class _Key, class _Tp, class _Compare, class _Allocator>
1448template <class ..._Args>
1449typename map<_Key, _Tp, _Compare, _Allocator>::iterator
1450map<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
1451                                                   _Args&& ...__args)
1452{
1453    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1454    iterator __r = __tree_.__node_insert_unique(__p.__i_, __h.get());
1455    if (__r.__i_.__ptr_ == __h.get())
1456        __h.release();
1457    return __r;
1458}
1459
1460#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1461
1462template <class _Key, class _Tp, class _Compare, class _Allocator>
1463inline _LIBCPP_INLINE_VISIBILITY
1464bool
1465operator==(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1466           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1467{
1468    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1469}
1470
1471template <class _Key, class _Tp, class _Compare, class _Allocator>
1472inline _LIBCPP_INLINE_VISIBILITY
1473bool
1474operator< (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1475           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1476{
1477    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1478}
1479
1480template <class _Key, class _Tp, class _Compare, class _Allocator>
1481inline _LIBCPP_INLINE_VISIBILITY
1482bool
1483operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1484           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1485{
1486    return !(__x == __y);
1487}
1488
1489template <class _Key, class _Tp, class _Compare, class _Allocator>
1490inline _LIBCPP_INLINE_VISIBILITY
1491bool
1492operator> (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1493           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1494{
1495    return __y < __x;
1496}
1497
1498template <class _Key, class _Tp, class _Compare, class _Allocator>
1499inline _LIBCPP_INLINE_VISIBILITY
1500bool
1501operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1502           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1503{
1504    return !(__x < __y);
1505}
1506
1507template <class _Key, class _Tp, class _Compare, class _Allocator>
1508inline _LIBCPP_INLINE_VISIBILITY
1509bool
1510operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1511           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1512{
1513    return !(__y < __x);
1514}
1515
1516template <class _Key, class _Tp, class _Compare, class _Allocator>
1517inline _LIBCPP_INLINE_VISIBILITY
1518void
1519swap(map<_Key, _Tp, _Compare, _Allocator>& __x,
1520     map<_Key, _Tp, _Compare, _Allocator>& __y)
1521    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
1522{
1523    __x.swap(__y);
1524}
1525
1526template <class _Key, class _Tp, class _Compare = less<_Key>,
1527          class _Allocator = allocator<pair<const _Key, _Tp> > >
1528class _LIBCPP_TYPE_VIS_ONLY multimap
1529{
1530public:
1531    // types:
1532    typedef _Key                                     key_type;
1533    typedef _Tp                                      mapped_type;
1534    typedef pair<const key_type, mapped_type>        value_type;
1535    typedef pair<key_type, mapped_type>              __nc_value_type;
1536    typedef _Compare                                 key_compare;
1537    typedef _Allocator                               allocator_type;
1538    typedef value_type&                              reference;
1539    typedef const value_type&                        const_reference;
1540
1541    class _LIBCPP_TYPE_VIS_ONLY value_compare
1542        : public binary_function<value_type, value_type, bool>
1543    {
1544        friend class multimap;
1545    protected:
1546        key_compare comp;
1547
1548        _LIBCPP_INLINE_VISIBILITY
1549        value_compare(key_compare c) : comp(c) {}
1550    public:
1551        _LIBCPP_INLINE_VISIBILITY
1552        bool operator()(const value_type& __x, const value_type& __y) const
1553            {return comp(__x.first, __y.first);}
1554    };
1555
1556private:
1557
1558    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
1559    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
1560    typedef typename allocator_traits<allocator_type>::template
1561#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
1562            rebind_alloc<__value_type>
1563#else
1564            rebind_alloc<__value_type>::other
1565#endif
1566                                                                    __allocator_type;
1567    typedef __tree<__value_type, __vc, __allocator_type>            __base;
1568    typedef typename __base::__node_traits                          __node_traits;
1569    typedef allocator_traits<allocator_type>                        __alloc_traits;
1570
1571    __base __tree_;
1572
1573public:
1574    typedef typename __alloc_traits::pointer               pointer;
1575    typedef typename __alloc_traits::const_pointer         const_pointer;
1576    typedef typename __alloc_traits::size_type             size_type;
1577    typedef typename __alloc_traits::difference_type       difference_type;
1578    typedef __map_iterator<typename __base::iterator>      iterator;
1579    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
1580    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
1581    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
1582
1583    _LIBCPP_INLINE_VISIBILITY
1584    multimap()
1585        _NOEXCEPT_(
1586            is_nothrow_default_constructible<allocator_type>::value &&
1587            is_nothrow_default_constructible<key_compare>::value &&
1588            is_nothrow_copy_constructible<key_compare>::value)
1589        : __tree_(__vc(key_compare())) {}
1590
1591    _LIBCPP_INLINE_VISIBILITY
1592    explicit multimap(const key_compare& __comp)
1593        _NOEXCEPT_(
1594            is_nothrow_default_constructible<allocator_type>::value &&
1595            is_nothrow_copy_constructible<key_compare>::value)
1596        : __tree_(__vc(__comp)) {}
1597
1598    _LIBCPP_INLINE_VISIBILITY
1599    explicit multimap(const key_compare& __comp, const allocator_type& __a)
1600        : __tree_(__vc(__comp), __a) {}
1601
1602    template <class _InputIterator>
1603        _LIBCPP_INLINE_VISIBILITY
1604        multimap(_InputIterator __f, _InputIterator __l,
1605            const key_compare& __comp = key_compare())
1606        : __tree_(__vc(__comp))
1607        {
1608            insert(__f, __l);
1609        }
1610
1611    template <class _InputIterator>
1612        _LIBCPP_INLINE_VISIBILITY
1613        multimap(_InputIterator __f, _InputIterator __l,
1614            const key_compare& __comp, const allocator_type& __a)
1615        : __tree_(__vc(__comp), __a)
1616        {
1617            insert(__f, __l);
1618        }
1619
1620#if _LIBCPP_STD_VER > 11
1621    template <class _InputIterator>
1622    _LIBCPP_INLINE_VISIBILITY 
1623    multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
1624        : multimap(__f, __l, key_compare(), __a) {}
1625#endif
1626
1627    _LIBCPP_INLINE_VISIBILITY
1628    multimap(const multimap& __m)
1629        : __tree_(__m.__tree_.value_comp(),
1630          __alloc_traits::select_on_container_copy_construction(__m.__tree_.__alloc()))
1631        {
1632            insert(__m.begin(), __m.end());
1633        }
1634
1635    _LIBCPP_INLINE_VISIBILITY
1636    multimap& operator=(const multimap& __m)
1637        {
1638#if __cplusplus >= 201103L
1639            __tree_ = __m.__tree_;
1640#else
1641            if (this != &__m) {
1642                __tree_.clear();
1643                __tree_.value_comp() = __m.__tree_.value_comp();
1644                __tree_.__copy_assign_alloc(__m.__tree_);
1645                insert(__m.begin(), __m.end());
1646            }
1647#endif
1648            return *this;
1649        }
1650
1651#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1652
1653    _LIBCPP_INLINE_VISIBILITY
1654    multimap(multimap&& __m)
1655        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
1656        : __tree_(_VSTD::move(__m.__tree_))
1657        {
1658        }
1659
1660    multimap(multimap&& __m, const allocator_type& __a);
1661
1662    _LIBCPP_INLINE_VISIBILITY
1663    multimap& operator=(multimap&& __m)
1664        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
1665        {
1666            __tree_ = _VSTD::move(__m.__tree_);
1667            return *this;
1668        }
1669
1670#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1671
1672#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1673
1674    _LIBCPP_INLINE_VISIBILITY
1675    multimap(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
1676        : __tree_(__vc(__comp))
1677        {
1678            insert(__il.begin(), __il.end());
1679        }
1680
1681    _LIBCPP_INLINE_VISIBILITY
1682    multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
1683        : __tree_(__vc(__comp), __a)
1684        {
1685            insert(__il.begin(), __il.end());
1686        }
1687
1688#if _LIBCPP_STD_VER > 11
1689    _LIBCPP_INLINE_VISIBILITY 
1690    multimap(initializer_list<value_type> __il, const allocator_type& __a)
1691        : multimap(__il, key_compare(), __a) {}
1692#endif
1693
1694    _LIBCPP_INLINE_VISIBILITY
1695    multimap& operator=(initializer_list<value_type> __il)
1696        {
1697            __tree_.__assign_multi(__il.begin(), __il.end());
1698            return *this;
1699        }
1700
1701#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1702
1703    _LIBCPP_INLINE_VISIBILITY
1704    explicit multimap(const allocator_type& __a)
1705        : __tree_(__a)
1706        {
1707        }
1708
1709    _LIBCPP_INLINE_VISIBILITY
1710    multimap(const multimap& __m, const allocator_type& __a)
1711        : __tree_(__m.__tree_.value_comp(), __a)
1712        {
1713            insert(__m.begin(), __m.end());
1714        }
1715
1716    _LIBCPP_INLINE_VISIBILITY
1717          iterator begin() _NOEXCEPT {return __tree_.begin();}
1718    _LIBCPP_INLINE_VISIBILITY
1719    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
1720    _LIBCPP_INLINE_VISIBILITY
1721          iterator end() _NOEXCEPT {return __tree_.end();}
1722    _LIBCPP_INLINE_VISIBILITY
1723    const_iterator end() const _NOEXCEPT {return __tree_.end();}
1724
1725    _LIBCPP_INLINE_VISIBILITY
1726          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1727    _LIBCPP_INLINE_VISIBILITY
1728    const_reverse_iterator rbegin() const _NOEXCEPT
1729        {return const_reverse_iterator(end());}
1730    _LIBCPP_INLINE_VISIBILITY
1731          reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
1732    _LIBCPP_INLINE_VISIBILITY
1733    const_reverse_iterator rend() const _NOEXCEPT
1734        {return const_reverse_iterator(begin());}
1735
1736    _LIBCPP_INLINE_VISIBILITY
1737    const_iterator cbegin()  const _NOEXCEPT {return begin();}
1738    _LIBCPP_INLINE_VISIBILITY
1739    const_iterator cend() const _NOEXCEPT {return end();}
1740    _LIBCPP_INLINE_VISIBILITY
1741    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1742    _LIBCPP_INLINE_VISIBILITY
1743    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1744
1745    _LIBCPP_INLINE_VISIBILITY
1746    bool empty() const _NOEXCEPT {return __tree_.size() == 0;}
1747    _LIBCPP_INLINE_VISIBILITY
1748    size_type size() const _NOEXCEPT {return __tree_.size();}
1749    _LIBCPP_INLINE_VISIBILITY
1750    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1751
1752    _LIBCPP_INLINE_VISIBILITY
1753    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1754    _LIBCPP_INLINE_VISIBILITY
1755    key_compare    key_comp() const {return __tree_.value_comp().key_comp();}
1756    _LIBCPP_INLINE_VISIBILITY
1757    value_compare  value_comp() const
1758        {return value_compare(__tree_.value_comp().key_comp());}
1759
1760#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1761#ifndef _LIBCPP_HAS_NO_VARIADICS
1762
1763    template <class ..._Args>
1764        iterator
1765        emplace(_Args&& ...__args);
1766
1767    template <class ..._Args>
1768        iterator
1769        emplace_hint(const_iterator __p, _Args&& ...__args);
1770
1771#endif  // _LIBCPP_HAS_NO_VARIADICS
1772
1773    template <class _Pp,
1774              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1775        _LIBCPP_INLINE_VISIBILITY
1776        iterator insert(_Pp&& __p)
1777            {return __tree_.__insert_multi(_VSTD::forward<_Pp>(__p));}
1778
1779    template <class _Pp,
1780              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1781        _LIBCPP_INLINE_VISIBILITY
1782        iterator insert(const_iterator __pos, _Pp&& __p)
1783            {return __tree_.__insert_multi(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1784
1785#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1786
1787    _LIBCPP_INLINE_VISIBILITY
1788    iterator insert(const value_type& __v) {return __tree_.__insert_multi(__v);}
1789
1790    _LIBCPP_INLINE_VISIBILITY
1791    iterator insert(const_iterator __p, const value_type& __v)
1792            {return __tree_.__insert_multi(__p.__i_, __v);}
1793
1794    template <class _InputIterator>
1795        _LIBCPP_INLINE_VISIBILITY
1796        void insert(_InputIterator __f, _InputIterator __l)
1797        {
1798            for (const_iterator __e = cend(); __f != __l; ++__f)
1799                __tree_.__insert_multi(__e.__i_, *__f);
1800        }
1801
1802#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1803
1804    _LIBCPP_INLINE_VISIBILITY
1805    void insert(initializer_list<value_type> __il)
1806        {insert(__il.begin(), __il.end());}
1807
1808#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1809
1810    _LIBCPP_INLINE_VISIBILITY
1811    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1812    _LIBCPP_INLINE_VISIBILITY
1813    size_type erase(const key_type& __k) {return __tree_.__erase_multi(__k);}
1814    _LIBCPP_INLINE_VISIBILITY
1815    iterator  erase(const_iterator __f, const_iterator __l)
1816        {return __tree_.erase(__f.__i_, __l.__i_);}
1817    _LIBCPP_INLINE_VISIBILITY
1818    void clear() {__tree_.clear();}
1819
1820    _LIBCPP_INLINE_VISIBILITY
1821    void swap(multimap& __m)
1822        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1823        {__tree_.swap(__m.__tree_);}
1824
1825    _LIBCPP_INLINE_VISIBILITY
1826    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1827    _LIBCPP_INLINE_VISIBILITY
1828    const_iterator find(const key_type& __k) const {return __tree_.find(__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    find(const _K2& __k)                           {return __tree_.find(__k);}
1834    template <typename _K2>
1835    _LIBCPP_INLINE_VISIBILITY
1836    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1837    find(const _K2& __k) const                     {return __tree_.find(__k);}
1838#endif
1839
1840    _LIBCPP_INLINE_VISIBILITY
1841    size_type      count(const key_type& __k) const
1842        {return __tree_.__count_multi(__k);}
1843#if _LIBCPP_STD_VER > 11
1844    template <typename _K2>
1845    _LIBCPP_INLINE_VISIBILITY
1846    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1847    count(const _K2& __k)                   {return __tree_.__count_multi(__k);}
1848#endif
1849    _LIBCPP_INLINE_VISIBILITY
1850    iterator lower_bound(const key_type& __k)
1851        {return __tree_.lower_bound(__k);}
1852    _LIBCPP_INLINE_VISIBILITY
1853    const_iterator lower_bound(const key_type& __k) const
1854            {return __tree_.lower_bound(__k);}
1855#if _LIBCPP_STD_VER > 11
1856    template <typename _K2>
1857    _LIBCPP_INLINE_VISIBILITY
1858    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1859    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1860
1861    template <typename _K2>
1862    _LIBCPP_INLINE_VISIBILITY
1863    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1864    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1865#endif
1866
1867    _LIBCPP_INLINE_VISIBILITY
1868    iterator upper_bound(const key_type& __k)
1869            {return __tree_.upper_bound(__k);}
1870    _LIBCPP_INLINE_VISIBILITY
1871    const_iterator upper_bound(const key_type& __k) const
1872            {return __tree_.upper_bound(__k);}
1873#if _LIBCPP_STD_VER > 11
1874    template <typename _K2>
1875    _LIBCPP_INLINE_VISIBILITY
1876    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1877    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1878    template <typename _K2>
1879    _LIBCPP_INLINE_VISIBILITY
1880    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1881    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1882#endif
1883
1884    _LIBCPP_INLINE_VISIBILITY
1885    pair<iterator,iterator>             equal_range(const key_type& __k)
1886            {return __tree_.__equal_range_multi(__k);}
1887    _LIBCPP_INLINE_VISIBILITY
1888    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1889            {return __tree_.__equal_range_multi(__k);}
1890#if _LIBCPP_STD_VER > 11
1891    template <typename _K2>
1892    _LIBCPP_INLINE_VISIBILITY
1893    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1894    equal_range(const _K2& __k)       {return __tree_.__equal_range_multi(__k);}
1895    template <typename _K2>
1896    _LIBCPP_INLINE_VISIBILITY
1897    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1898    equal_range(const _K2& __k) const {return __tree_.__equal_range_multi(__k);}
1899#endif
1900
1901private:
1902    typedef typename __base::__node                    __node;
1903    typedef typename __base::__node_allocator          __node_allocator;
1904    typedef typename __base::__node_pointer            __node_pointer;
1905    typedef typename __base::__node_const_pointer      __node_const_pointer;
1906    typedef __map_node_destructor<__node_allocator> _Dp;
1907    typedef unique_ptr<__node, _Dp> __node_holder;
1908
1909#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1910    __node_holder __construct_node();
1911    template <class _A0>
1912        __node_holder
1913         __construct_node(_A0&& __a0);
1914#ifndef _LIBCPP_HAS_NO_VARIADICS
1915    template <class _A0, class _A1, class ..._Args>
1916        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
1917#endif  // _LIBCPP_HAS_NO_VARIADICS
1918#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1919};
1920
1921#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1922
1923template <class _Key, class _Tp, class _Compare, class _Allocator>
1924multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a)
1925    : __tree_(_VSTD::move(__m.__tree_), __a)
1926{
1927    if (__a != __m.get_allocator())
1928    {
1929        const_iterator __e = cend();
1930        while (!__m.empty())
1931            __tree_.__insert_multi(__e.__i_,
1932                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
1933    }
1934}
1935
1936template <class _Key, class _Tp, class _Compare, class _Allocator>
1937typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1938multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node()
1939{
1940    __node_allocator& __na = __tree_.__node_alloc();
1941    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1942    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
1943    __h.get_deleter().__first_constructed = true;
1944    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1945    __h.get_deleter().__second_constructed = true;
1946    return __h;
1947}
1948
1949template <class _Key, class _Tp, class _Compare, class _Allocator>
1950template <class _A0>
1951typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1952multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
1953{
1954    __node_allocator& __na = __tree_.__node_alloc();
1955    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1956    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
1957    __h.get_deleter().__first_constructed = true;
1958    __h.get_deleter().__second_constructed = true;
1959    return __h;
1960}
1961
1962#ifndef _LIBCPP_HAS_NO_VARIADICS
1963
1964template <class _Key, class _Tp, class _Compare, class _Allocator>
1965template <class _A0, class _A1, class ..._Args>
1966typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
1967multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
1968{
1969    __node_allocator& __na = __tree_.__node_alloc();
1970    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1971    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
1972                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
1973                             _VSTD::forward<_Args>(__args)...);
1974    __h.get_deleter().__first_constructed = true;
1975    __h.get_deleter().__second_constructed = true;
1976    return __h;
1977}
1978
1979#endif  // _LIBCPP_HAS_NO_VARIADICS
1980#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1981
1982#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1983
1984template <class _Key, class _Tp, class _Compare, class _Allocator>
1985template <class ..._Args>
1986typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
1987multimap<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
1988{
1989    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1990    iterator __r = __tree_.__node_insert_multi(__h.get());
1991    __h.release();
1992    return __r;
1993}
1994
1995template <class _Key, class _Tp, class _Compare, class _Allocator>
1996template <class ..._Args>
1997typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
1998multimap<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
1999                                                        _Args&& ...__args)
2000{
2001    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2002    iterator __r = __tree_.__node_insert_multi(__p.__i_, __h.get());
2003    __h.release();
2004    return __r;
2005}
2006
2007#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
2008
2009template <class _Key, class _Tp, class _Compare, class _Allocator>
2010inline _LIBCPP_INLINE_VISIBILITY
2011bool
2012operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2013           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2014{
2015    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
2016}
2017
2018template <class _Key, class _Tp, class _Compare, class _Allocator>
2019inline _LIBCPP_INLINE_VISIBILITY
2020bool
2021operator< (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2022           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2023{
2024    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
2025}
2026
2027template <class _Key, class _Tp, class _Compare, class _Allocator>
2028inline _LIBCPP_INLINE_VISIBILITY
2029bool
2030operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2031           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2032{
2033    return !(__x == __y);
2034}
2035
2036template <class _Key, class _Tp, class _Compare, class _Allocator>
2037inline _LIBCPP_INLINE_VISIBILITY
2038bool
2039operator> (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2040           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2041{
2042    return __y < __x;
2043}
2044
2045template <class _Key, class _Tp, class _Compare, class _Allocator>
2046inline _LIBCPP_INLINE_VISIBILITY
2047bool
2048operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2049           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2050{
2051    return !(__x < __y);
2052}
2053
2054template <class _Key, class _Tp, class _Compare, class _Allocator>
2055inline _LIBCPP_INLINE_VISIBILITY
2056bool
2057operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2058           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2059{
2060    return !(__y < __x);
2061}
2062
2063template <class _Key, class _Tp, class _Compare, class _Allocator>
2064inline _LIBCPP_INLINE_VISIBILITY
2065void
2066swap(multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2067     multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2068    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
2069{
2070    __x.swap(__y);
2071}
2072
2073_LIBCPP_END_NAMESPACE_STD
2074
2075#endif  // _LIBCPP_MAP
2076