xref: /llvm-project-15.0.7/libcxx/include/map (revision 4d75e8d6)
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    pair<iterator, bool> insert(      value_type&& v);                                // C++17
130    template <class P>
131        pair<iterator, bool> insert(P&& p);
132    iterator insert(const_iterator position, const value_type& v);
133    iterator insert(const_iterator position,       value_type&& v);                   // C++17
134    template <class P>
135        iterator insert(const_iterator position, P&& p);
136    template <class InputIterator>
137        void insert(InputIterator first, InputIterator last);
138    void insert(initializer_list<value_type> il);
139
140    template <class... Args>
141        pair<iterator, bool> try_emplace(const key_type& k, Args&&... args);          // C++17
142    template <class... Args>
143        pair<iterator, bool> try_emplace(key_type&& k, Args&&... args);               // C++17
144    template <class... Args>
145        iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); // C++17
146    template <class... Args>
147        iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args);      // C++17
148    template <class M>
149        pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj);            // C++17
150    template <class M>
151        pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj);                 // C++17
152    template <class M>
153        iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj);   // C++17
154    template <class M>
155        iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj);        // C++17
156
157    iterator  erase(const_iterator position);
158    iterator  erase(iterator position); // C++14
159    size_type erase(const key_type& k);
160    iterator  erase(const_iterator first, const_iterator last);
161    void clear() noexcept;
162
163    void swap(map& m)
164        noexcept(allocator_traits<allocator_type>::is_always_equal::value &&
165            __is_nothrow_swappable<key_compare>::value); // C++17
166
167    // observers:
168    allocator_type get_allocator() const noexcept;
169    key_compare    key_comp()      const;
170    value_compare  value_comp()    const;
171
172    // map operations:
173          iterator find(const key_type& k);
174    const_iterator find(const key_type& k) const;
175    template<typename K>
176        iterator find(const K& x);              // C++14
177    template<typename K>
178        const_iterator find(const K& x) const;  // C++14
179    template<typename K>
180      size_type count(const K& x) const;        // C++14
181
182    size_type      count(const key_type& k) const;
183          iterator lower_bound(const key_type& k);
184    const_iterator lower_bound(const key_type& k) const;
185    template<typename K>
186        iterator lower_bound(const K& x);              // C++14
187    template<typename K>
188        const_iterator lower_bound(const K& x) const;  // C++14
189
190          iterator upper_bound(const key_type& k);
191    const_iterator upper_bound(const key_type& k) const;
192    template<typename K>
193        iterator upper_bound(const K& x);              // C++14
194    template<typename K>
195        const_iterator upper_bound(const K& x) const;  // C++14
196
197    pair<iterator,iterator>             equal_range(const key_type& k);
198    pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
199    template<typename K>
200        pair<iterator,iterator>             equal_range(const K& x);        // C++14
201    template<typename K>
202        pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14
203};
204
205template <class Key, class T, class Compare, class Allocator>
206bool
207operator==(const map<Key, T, Compare, Allocator>& x,
208           const map<Key, T, Compare, Allocator>& y);
209
210template <class Key, class T, class Compare, class Allocator>
211bool
212operator< (const map<Key, T, Compare, Allocator>& x,
213           const map<Key, T, Compare, Allocator>& y);
214
215template <class Key, class T, class Compare, class Allocator>
216bool
217operator!=(const map<Key, T, Compare, Allocator>& x,
218           const map<Key, T, Compare, Allocator>& y);
219
220template <class Key, class T, class Compare, class Allocator>
221bool
222operator> (const map<Key, T, Compare, Allocator>& x,
223           const map<Key, T, Compare, Allocator>& y);
224
225template <class Key, class T, class Compare, class Allocator>
226bool
227operator>=(const map<Key, T, Compare, Allocator>& x,
228           const map<Key, T, Compare, Allocator>& y);
229
230template <class Key, class T, class Compare, class Allocator>
231bool
232operator<=(const map<Key, T, Compare, Allocator>& x,
233           const map<Key, T, Compare, Allocator>& y);
234
235// specialized algorithms:
236template <class Key, class T, class Compare, class Allocator>
237void
238swap(map<Key, T, Compare, Allocator>& x, map<Key, T, Compare, Allocator>& y)
239    noexcept(noexcept(x.swap(y)));
240
241template <class Key, class T, class Compare = less<Key>,
242          class Allocator = allocator<pair<const Key, T>>>
243class multimap
244{
245public:
246    // types:
247    typedef Key                                      key_type;
248    typedef T                                        mapped_type;
249    typedef pair<const key_type,mapped_type>         value_type;
250    typedef Compare                                  key_compare;
251    typedef Allocator                                allocator_type;
252    typedef typename allocator_type::reference       reference;
253    typedef typename allocator_type::const_reference const_reference;
254    typedef typename allocator_type::size_type       size_type;
255    typedef typename allocator_type::difference_type difference_type;
256    typedef typename allocator_type::pointer         pointer;
257    typedef typename allocator_type::const_pointer   const_pointer;
258
259    typedef implementation-defined                   iterator;
260    typedef implementation-defined                   const_iterator;
261    typedef std::reverse_iterator<iterator>          reverse_iterator;
262    typedef std::reverse_iterator<const_iterator>    const_reverse_iterator;
263
264    class value_compare
265        : public binary_function<value_type,value_type,bool>
266    {
267        friend class multimap;
268    protected:
269        key_compare comp;
270        value_compare(key_compare c);
271    public:
272        bool operator()(const value_type& x, const value_type& y) const;
273    };
274
275    // construct/copy/destroy:
276    multimap()
277        noexcept(
278            is_nothrow_default_constructible<allocator_type>::value &&
279            is_nothrow_default_constructible<key_compare>::value &&
280            is_nothrow_copy_constructible<key_compare>::value);
281    explicit multimap(const key_compare& comp);
282    multimap(const key_compare& comp, const allocator_type& a);
283    template <class InputIterator>
284        multimap(InputIterator first, InputIterator last, const key_compare& comp);
285    template <class InputIterator>
286        multimap(InputIterator first, InputIterator last, const key_compare& comp,
287                 const allocator_type& a);
288    multimap(const multimap& m);
289    multimap(multimap&& m)
290        noexcept(
291            is_nothrow_move_constructible<allocator_type>::value &&
292            is_nothrow_move_constructible<key_compare>::value);
293    explicit multimap(const allocator_type& a);
294    multimap(const multimap& m, const allocator_type& a);
295    multimap(multimap&& m, const allocator_type& a);
296    multimap(initializer_list<value_type> il, const key_compare& comp = key_compare());
297    multimap(initializer_list<value_type> il, const key_compare& comp,
298             const allocator_type& a);
299    template <class InputIterator>
300        multimap(InputIterator first, InputIterator last, const allocator_type& a)
301            : multimap(first, last, Compare(), a) {} // C++14
302    multimap(initializer_list<value_type> il, const allocator_type& a)
303        : multimap(il, Compare(), a) {} // C++14
304    ~multimap();
305
306    multimap& operator=(const multimap& m);
307    multimap& operator=(multimap&& m)
308        noexcept(
309            allocator_type::propagate_on_container_move_assignment::value &&
310            is_nothrow_move_assignable<allocator_type>::value &&
311            is_nothrow_move_assignable<key_compare>::value);
312    multimap& operator=(initializer_list<value_type> il);
313
314    // iterators:
315          iterator begin() noexcept;
316    const_iterator begin() const noexcept;
317          iterator end() noexcept;
318    const_iterator end()   const noexcept;
319
320          reverse_iterator rbegin() noexcept;
321    const_reverse_iterator rbegin() const noexcept;
322          reverse_iterator rend() noexcept;
323    const_reverse_iterator rend()   const noexcept;
324
325    const_iterator         cbegin()  const noexcept;
326    const_iterator         cend()    const noexcept;
327    const_reverse_iterator crbegin() const noexcept;
328    const_reverse_iterator crend()   const noexcept;
329
330    // capacity:
331    bool      empty()    const noexcept;
332    size_type size()     const noexcept;
333    size_type max_size() const noexcept;
334
335    // modifiers:
336    template <class... Args>
337        iterator emplace(Args&&... args);
338    template <class... Args>
339        iterator emplace_hint(const_iterator position, Args&&... args);
340    iterator insert(const value_type& v);
341    iterator insert(      value_type&& v);                                            // C++17
342    template <class P>
343        iterator insert(P&& p);
344    iterator insert(const_iterator position, const value_type& v);
345    iterator insert(const_iterator position,       value_type&& v);                   // C++17
346    template <class P>
347        iterator insert(const_iterator position, P&& p);
348    template <class InputIterator>
349        void insert(InputIterator first, InputIterator last);
350    void insert(initializer_list<value_type> il);
351
352    iterator  erase(const_iterator position);
353    iterator  erase(iterator position); // C++14
354    size_type erase(const key_type& k);
355    iterator  erase(const_iterator first, const_iterator last);
356    void clear() noexcept;
357
358    void swap(multimap& m)
359        noexcept(allocator_traits<allocator_type>::is_always_equal::value &&
360            __is_nothrow_swappable<key_compare>::value); // C++17
361
362    // observers:
363    allocator_type get_allocator() const noexcept;
364    key_compare    key_comp()      const;
365    value_compare  value_comp()    const;
366
367    // map operations:
368          iterator find(const key_type& k);
369    const_iterator find(const key_type& k) const;
370    template<typename K>
371        iterator find(const K& x);              // C++14
372    template<typename K>
373        const_iterator find(const K& x) const;  // C++14
374    template<typename K>
375      size_type count(const K& x) const;        // C++14
376
377    size_type      count(const key_type& k) const;
378          iterator lower_bound(const key_type& k);
379    const_iterator lower_bound(const key_type& k) const;
380    template<typename K>
381        iterator lower_bound(const K& x);              // C++14
382    template<typename K>
383        const_iterator lower_bound(const K& x) const;  // C++14
384
385          iterator upper_bound(const key_type& k);
386    const_iterator upper_bound(const key_type& k) const;
387    template<typename K>
388        iterator upper_bound(const K& x);              // C++14
389    template<typename K>
390        const_iterator upper_bound(const K& x) const;  // C++14
391
392    pair<iterator,iterator>             equal_range(const key_type& k);
393    pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
394    template<typename K>
395        pair<iterator,iterator>             equal_range(const K& x);        // C++14
396    template<typename K>
397        pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14
398};
399
400template <class Key, class T, class Compare, class Allocator>
401bool
402operator==(const multimap<Key, T, Compare, Allocator>& x,
403           const multimap<Key, T, Compare, Allocator>& y);
404
405template <class Key, class T, class Compare, class Allocator>
406bool
407operator< (const multimap<Key, T, Compare, Allocator>& x,
408           const multimap<Key, T, Compare, Allocator>& y);
409
410template <class Key, class T, class Compare, class Allocator>
411bool
412operator!=(const multimap<Key, T, Compare, Allocator>& x,
413           const multimap<Key, T, Compare, Allocator>& y);
414
415template <class Key, class T, class Compare, class Allocator>
416bool
417operator> (const multimap<Key, T, Compare, Allocator>& x,
418           const multimap<Key, T, Compare, Allocator>& y);
419
420template <class Key, class T, class Compare, class Allocator>
421bool
422operator>=(const multimap<Key, T, Compare, Allocator>& x,
423           const multimap<Key, T, Compare, Allocator>& y);
424
425template <class Key, class T, class Compare, class Allocator>
426bool
427operator<=(const multimap<Key, T, Compare, Allocator>& x,
428           const multimap<Key, T, Compare, Allocator>& y);
429
430// specialized algorithms:
431template <class Key, class T, class Compare, class Allocator>
432void
433swap(multimap<Key, T, Compare, Allocator>& x,
434     multimap<Key, T, Compare, Allocator>& y)
435    noexcept(noexcept(x.swap(y)));
436
437}  // std
438
439*/
440
441#include <__config>
442#include <__tree>
443#include <iterator>
444#include <memory>
445#include <utility>
446#include <functional>
447#include <initializer_list>
448#include <type_traits>
449
450#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
451#pragma GCC system_header
452#endif
453
454_LIBCPP_BEGIN_NAMESPACE_STD
455
456template <class _Key, class _CP, class _Compare,
457          bool = is_empty<_Compare>::value && !__libcpp_is_final<_Compare>::value
458         >
459class __map_value_compare
460    : private _Compare
461{
462public:
463    _LIBCPP_INLINE_VISIBILITY
464    __map_value_compare()
465        _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value)
466        : _Compare() {}
467    _LIBCPP_INLINE_VISIBILITY
468    __map_value_compare(_Compare c)
469        _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value)
470        : _Compare(c) {}
471    _LIBCPP_INLINE_VISIBILITY
472    const _Compare& key_comp() const _NOEXCEPT {return *this;}
473    _LIBCPP_INLINE_VISIBILITY
474    bool operator()(const _CP& __x, const _CP& __y) const
475        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y.__cc.first);}
476    _LIBCPP_INLINE_VISIBILITY
477    bool operator()(const _CP& __x, const _Key& __y) const
478        {return static_cast<const _Compare&>(*this)(__x.__cc.first, __y);}
479    _LIBCPP_INLINE_VISIBILITY
480    bool operator()(const _Key& __x, const _CP& __y) const
481        {return static_cast<const _Compare&>(*this)(__x, __y.__cc.first);}
482    void swap(__map_value_compare&__y)
483        _NOEXCEPT_(__is_nothrow_swappable<_Compare>::value)
484    {
485        using _VSTD::swap;
486        swap(static_cast<const _Compare&>(*this), static_cast<const _Compare&>(__y));
487    }
488
489#if _LIBCPP_STD_VER > 11
490    template <typename _K2>
491    _LIBCPP_INLINE_VISIBILITY
492    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
493    operator () ( const _K2& __x, const _CP& __y ) const
494        {return static_cast<const _Compare&>(*this) (__x, __y.__cc.first);}
495
496    template <typename _K2>
497    _LIBCPP_INLINE_VISIBILITY
498    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
499    operator () (const _CP& __x, const _K2& __y) const
500        {return static_cast<const _Compare&>(*this) (__x.__cc.first, __y);}
501#endif
502};
503
504template <class _Key, class _CP, class _Compare>
505class __map_value_compare<_Key, _CP, _Compare, false>
506{
507    _Compare comp;
508
509public:
510    _LIBCPP_INLINE_VISIBILITY
511    __map_value_compare()
512        _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value)
513        : comp() {}
514    _LIBCPP_INLINE_VISIBILITY
515    __map_value_compare(_Compare c)
516        _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value)
517        : comp(c) {}
518    _LIBCPP_INLINE_VISIBILITY
519    const _Compare& key_comp() const _NOEXCEPT {return comp;}
520
521    _LIBCPP_INLINE_VISIBILITY
522    bool operator()(const _CP& __x, const _CP& __y) const
523        {return comp(__x.__cc.first, __y.__cc.first);}
524    _LIBCPP_INLINE_VISIBILITY
525    bool operator()(const _CP& __x, const _Key& __y) const
526        {return comp(__x.__cc.first, __y);}
527    _LIBCPP_INLINE_VISIBILITY
528    bool operator()(const _Key& __x, const _CP& __y) const
529        {return comp(__x, __y.__cc.first);}
530    void swap(__map_value_compare&__y)
531        _NOEXCEPT_(__is_nothrow_swappable<_Compare>::value)
532    {
533        using _VSTD::swap;
534        swap(comp, __y.comp);
535    }
536
537#if _LIBCPP_STD_VER > 11
538    template <typename _K2>
539    _LIBCPP_INLINE_VISIBILITY
540    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
541    operator () ( const _K2& __x, const _CP& __y ) const
542        {return comp (__x, __y.__cc.first);}
543
544    template <typename _K2>
545    _LIBCPP_INLINE_VISIBILITY
546    typename enable_if<__is_transparent<_Compare, _K2>::value, bool>::type
547    operator () (const _CP& __x, const _K2& __y) const
548        {return comp (__x.__cc.first, __y);}
549#endif
550};
551
552template <class _Key, class _CP, class _Compare, bool __b>
553inline _LIBCPP_INLINE_VISIBILITY
554void
555swap(__map_value_compare<_Key, _CP, _Compare, __b>& __x,
556     __map_value_compare<_Key, _CP, _Compare, __b>& __y)
557    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
558{
559    __x.swap(__y);
560}
561
562template <class _Allocator>
563class __map_node_destructor
564{
565    typedef _Allocator                          allocator_type;
566    typedef allocator_traits<allocator_type>    __alloc_traits;
567
568public:
569    typedef typename __alloc_traits::pointer    pointer;
570
571private:
572    allocator_type& __na_;
573
574    __map_node_destructor& operator=(const __map_node_destructor&);
575
576public:
577    bool __first_constructed;
578    bool __second_constructed;
579
580    _LIBCPP_INLINE_VISIBILITY
581    explicit __map_node_destructor(allocator_type& __na) _NOEXCEPT
582        : __na_(__na),
583          __first_constructed(false),
584          __second_constructed(false)
585        {}
586
587#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
588    _LIBCPP_INLINE_VISIBILITY
589    __map_node_destructor(__tree_node_destructor<allocator_type>&& __x) _NOEXCEPT
590        : __na_(__x.__na_),
591          __first_constructed(__x.__value_constructed),
592          __second_constructed(__x.__value_constructed)
593        {
594            __x.__value_constructed = false;
595        }
596#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
597
598    _LIBCPP_INLINE_VISIBILITY
599    void operator()(pointer __p) _NOEXCEPT
600    {
601        if (__second_constructed)
602            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.second));
603        if (__first_constructed)
604            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.__cc.first));
605        if (__p)
606            __alloc_traits::deallocate(__na_, __p, 1);
607    }
608};
609
610template <class _Key, class _Tp, class _Compare, class _Allocator>
611    class map;
612template <class _Key, class _Tp, class _Compare, class _Allocator>
613    class multimap;
614template <class _TreeIterator> class __map_const_iterator;
615
616#ifndef _LIBCPP_CXX03_LANG
617
618template <class _Key, class _Tp>
619union __value_type
620{
621    typedef _Key                                     key_type;
622    typedef _Tp                                      mapped_type;
623    typedef pair<const key_type, mapped_type>        value_type;
624    typedef pair<key_type, mapped_type>              __nc_value_type;
625
626    value_type __cc;
627    __nc_value_type __nc;
628
629    template <class ..._Args>
630    _LIBCPP_INLINE_VISIBILITY
631    __value_type(_Args&& ...__args)
632        : __cc(std::forward<_Args>(__args)...) {}
633
634    _LIBCPP_INLINE_VISIBILITY
635    __value_type(const __value_type& __v)
636        : __cc(__v.__cc) {}
637
638    _LIBCPP_INLINE_VISIBILITY
639    __value_type(__value_type& __v)
640        : __cc(__v.__cc) {}
641
642    _LIBCPP_INLINE_VISIBILITY
643    __value_type(__value_type&& __v)
644        : __nc(std::move(__v.__nc)) {}
645
646    _LIBCPP_INLINE_VISIBILITY
647    __value_type& operator=(const __value_type& __v)
648        {__nc = __v.__cc; return *this;}
649
650    _LIBCPP_INLINE_VISIBILITY
651    __value_type& operator=(__value_type&& __v)
652        {__nc = std::move(__v.__nc); return *this;}
653
654    _LIBCPP_INLINE_VISIBILITY
655    ~__value_type() {__cc.~value_type();}
656};
657
658#else
659
660template <class _Key, class _Tp>
661struct __value_type
662{
663    typedef _Key                                     key_type;
664    typedef _Tp                                      mapped_type;
665    typedef pair<const key_type, mapped_type>        value_type;
666
667    value_type __cc;
668
669    _LIBCPP_INLINE_VISIBILITY
670    __value_type() {}
671
672    template <class _A0>
673    _LIBCPP_INLINE_VISIBILITY
674    __value_type(const _A0& __a0)
675        : __cc(__a0) {}
676
677    template <class _A0, class _A1>
678    _LIBCPP_INLINE_VISIBILITY
679    __value_type(const _A0& __a0, const _A1& __a1)
680        : __cc(__a0, __a1) {}
681};
682
683#endif
684
685template <class _Tp>
686struct __extract_key_value_types;
687
688template <class _Key, class _Tp>
689struct __extract_key_value_types<__value_type<_Key, _Tp> >
690{
691  typedef _Key const __key_type;
692  typedef _Tp        __mapped_type;
693};
694
695template <class _TreeIterator>
696class _LIBCPP_TYPE_VIS_ONLY __map_iterator
697{
698    typedef typename _TreeIterator::_NodeTypes                   _NodeTypes;
699    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
700
701    _TreeIterator __i_;
702
703public:
704    typedef bidirectional_iterator_tag                           iterator_category;
705    typedef typename _NodeTypes::__map_value_type                value_type;
706    typedef typename _TreeIterator::difference_type              difference_type;
707    typedef value_type&                                          reference;
708    typedef typename _NodeTypes::__map_value_type_pointer        pointer;
709
710    _LIBCPP_INLINE_VISIBILITY
711    __map_iterator() _NOEXCEPT {}
712
713    _LIBCPP_INLINE_VISIBILITY
714    __map_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
715
716    _LIBCPP_INLINE_VISIBILITY
717    reference operator*() const {return __i_->__cc;}
718    _LIBCPP_INLINE_VISIBILITY
719    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
720
721    _LIBCPP_INLINE_VISIBILITY
722    __map_iterator& operator++() {++__i_; return *this;}
723    _LIBCPP_INLINE_VISIBILITY
724    __map_iterator operator++(int)
725    {
726        __map_iterator __t(*this);
727        ++(*this);
728        return __t;
729    }
730
731    _LIBCPP_INLINE_VISIBILITY
732    __map_iterator& operator--() {--__i_; return *this;}
733    _LIBCPP_INLINE_VISIBILITY
734    __map_iterator operator--(int)
735    {
736        __map_iterator __t(*this);
737        --(*this);
738        return __t;
739    }
740
741    friend _LIBCPP_INLINE_VISIBILITY
742    bool operator==(const __map_iterator& __x, const __map_iterator& __y)
743        {return __x.__i_ == __y.__i_;}
744    friend
745    _LIBCPP_INLINE_VISIBILITY
746    bool operator!=(const __map_iterator& __x, const __map_iterator& __y)
747        {return __x.__i_ != __y.__i_;}
748
749    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
750    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
751    template <class> friend class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator;
752};
753
754template <class _TreeIterator>
755class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator
756{
757    typedef typename _TreeIterator::_NodeTypes                   _NodeTypes;
758    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
759
760    _TreeIterator __i_;
761
762public:
763    typedef bidirectional_iterator_tag                           iterator_category;
764    typedef typename _NodeTypes::__map_value_type                value_type;
765    typedef typename _TreeIterator::difference_type              difference_type;
766    typedef const value_type&                                    reference;
767    typedef typename _NodeTypes::__const_map_value_type_pointer  pointer;
768
769    _LIBCPP_INLINE_VISIBILITY
770    __map_const_iterator() _NOEXCEPT {}
771
772    _LIBCPP_INLINE_VISIBILITY
773    __map_const_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
774    _LIBCPP_INLINE_VISIBILITY
775    __map_const_iterator(__map_iterator<
776        typename _TreeIterator::__non_const_iterator> __i) _NOEXCEPT
777        : __i_(__i.__i_) {}
778
779    _LIBCPP_INLINE_VISIBILITY
780    reference operator*() const {return __i_->__cc;}
781    _LIBCPP_INLINE_VISIBILITY
782    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
783
784    _LIBCPP_INLINE_VISIBILITY
785    __map_const_iterator& operator++() {++__i_; return *this;}
786    _LIBCPP_INLINE_VISIBILITY
787    __map_const_iterator operator++(int)
788    {
789        __map_const_iterator __t(*this);
790        ++(*this);
791        return __t;
792    }
793
794    _LIBCPP_INLINE_VISIBILITY
795    __map_const_iterator& operator--() {--__i_; return *this;}
796    _LIBCPP_INLINE_VISIBILITY
797    __map_const_iterator operator--(int)
798    {
799        __map_const_iterator __t(*this);
800        --(*this);
801        return __t;
802    }
803
804    friend _LIBCPP_INLINE_VISIBILITY
805    bool operator==(const __map_const_iterator& __x, const __map_const_iterator& __y)
806        {return __x.__i_ == __y.__i_;}
807    friend _LIBCPP_INLINE_VISIBILITY
808    bool operator!=(const __map_const_iterator& __x, const __map_const_iterator& __y)
809        {return __x.__i_ != __y.__i_;}
810
811    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
812    template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
813    template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY __tree_const_iterator;
814};
815
816template <class _Key, class _Tp, class _Compare = less<_Key>,
817          class _Allocator = allocator<pair<const _Key, _Tp> > >
818class _LIBCPP_TYPE_VIS_ONLY map
819{
820public:
821    // types:
822    typedef _Key                                     key_type;
823    typedef _Tp                                      mapped_type;
824    typedef pair<const key_type, mapped_type>        value_type;
825    typedef pair<key_type, mapped_type>              __nc_value_type;
826    typedef _Compare                                 key_compare;
827    typedef _Allocator                               allocator_type;
828    typedef value_type&                              reference;
829    typedef const value_type&                        const_reference;
830
831    static_assert((is_same<typename allocator_type::value_type, value_type>::value),
832                  "Allocator::value_type must be same type as value_type");
833
834    class _LIBCPP_TYPE_VIS_ONLY value_compare
835        : public binary_function<value_type, value_type, bool>
836    {
837        friend class map;
838    protected:
839        key_compare comp;
840
841        _LIBCPP_INLINE_VISIBILITY value_compare(key_compare c) : comp(c) {}
842    public:
843        _LIBCPP_INLINE_VISIBILITY
844        bool operator()(const value_type& __x, const value_type& __y) const
845            {return comp(__x.first, __y.first);}
846    };
847
848private:
849
850    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
851    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
852    typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>,
853                                                 __value_type>::type __allocator_type;
854    typedef __tree<__value_type, __vc, __allocator_type>   __base;
855    typedef typename __base::__node_traits                 __node_traits;
856    typedef allocator_traits<allocator_type>               __alloc_traits;
857
858    __base __tree_;
859
860public:
861    typedef typename __alloc_traits::pointer               pointer;
862    typedef typename __alloc_traits::const_pointer         const_pointer;
863    typedef typename __alloc_traits::size_type             size_type;
864    typedef typename __alloc_traits::difference_type       difference_type;
865    typedef __map_iterator<typename __base::iterator>             iterator;
866    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
867    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
868    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
869
870    _LIBCPP_INLINE_VISIBILITY
871    map()
872        _NOEXCEPT_(
873            is_nothrow_default_constructible<allocator_type>::value &&
874            is_nothrow_default_constructible<key_compare>::value &&
875            is_nothrow_copy_constructible<key_compare>::value)
876        : __tree_(__vc(key_compare())) {}
877
878    _LIBCPP_INLINE_VISIBILITY
879    explicit map(const key_compare& __comp)
880        _NOEXCEPT_(
881            is_nothrow_default_constructible<allocator_type>::value &&
882            is_nothrow_copy_constructible<key_compare>::value)
883        : __tree_(__vc(__comp)) {}
884
885    _LIBCPP_INLINE_VISIBILITY
886    explicit map(const key_compare& __comp, const allocator_type& __a)
887        : __tree_(__vc(__comp), __a) {}
888
889    template <class _InputIterator>
890    _LIBCPP_INLINE_VISIBILITY
891        map(_InputIterator __f, _InputIterator __l,
892            const key_compare& __comp = key_compare())
893        : __tree_(__vc(__comp))
894        {
895            insert(__f, __l);
896        }
897
898    template <class _InputIterator>
899    _LIBCPP_INLINE_VISIBILITY
900        map(_InputIterator __f, _InputIterator __l,
901            const key_compare& __comp, const allocator_type& __a)
902        : __tree_(__vc(__comp), __a)
903        {
904            insert(__f, __l);
905        }
906
907#if _LIBCPP_STD_VER > 11
908    template <class _InputIterator>
909    _LIBCPP_INLINE_VISIBILITY
910    map(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
911        : map(__f, __l, key_compare(), __a) {}
912#endif
913
914    _LIBCPP_INLINE_VISIBILITY
915    map(const map& __m)
916        : __tree_(__m.__tree_)
917        {
918            insert(__m.begin(), __m.end());
919        }
920
921    _LIBCPP_INLINE_VISIBILITY
922    map& operator=(const map& __m)
923        {
924#if __cplusplus >= 201103L
925            __tree_ = __m.__tree_;
926#else
927            if (this != &__m) {
928                __tree_.clear();
929                __tree_.value_comp() = __m.__tree_.value_comp();
930                __tree_.__copy_assign_alloc(__m.__tree_);
931                insert(__m.begin(), __m.end());
932            }
933#endif
934            return *this;
935        }
936
937#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
938
939    _LIBCPP_INLINE_VISIBILITY
940    map(map&& __m)
941        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
942        : __tree_(_VSTD::move(__m.__tree_))
943        {
944        }
945
946    map(map&& __m, const allocator_type& __a);
947
948    _LIBCPP_INLINE_VISIBILITY
949    map& operator=(map&& __m)
950        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
951        {
952            __tree_ = _VSTD::move(__m.__tree_);
953            return *this;
954        }
955
956#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
957
958#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
959
960    _LIBCPP_INLINE_VISIBILITY
961    map(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
962        : __tree_(__vc(__comp))
963        {
964            insert(__il.begin(), __il.end());
965        }
966
967    _LIBCPP_INLINE_VISIBILITY
968    map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
969        : __tree_(__vc(__comp), __a)
970        {
971            insert(__il.begin(), __il.end());
972        }
973
974#if _LIBCPP_STD_VER > 11
975    _LIBCPP_INLINE_VISIBILITY
976    map(initializer_list<value_type> __il, const allocator_type& __a)
977        : map(__il, key_compare(), __a) {}
978#endif
979
980    _LIBCPP_INLINE_VISIBILITY
981    map& operator=(initializer_list<value_type> __il)
982        {
983            __tree_.__assign_unique(__il.begin(), __il.end());
984            return *this;
985        }
986
987#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
988
989    _LIBCPP_INLINE_VISIBILITY
990    explicit map(const allocator_type& __a)
991        : __tree_(__a)
992        {
993        }
994
995    _LIBCPP_INLINE_VISIBILITY
996    map(const map& __m, const allocator_type& __a)
997        : __tree_(__m.__tree_.value_comp(), __a)
998        {
999            insert(__m.begin(), __m.end());
1000        }
1001
1002    _LIBCPP_INLINE_VISIBILITY
1003          iterator begin() _NOEXCEPT {return __tree_.begin();}
1004    _LIBCPP_INLINE_VISIBILITY
1005    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
1006    _LIBCPP_INLINE_VISIBILITY
1007          iterator end() _NOEXCEPT {return __tree_.end();}
1008    _LIBCPP_INLINE_VISIBILITY
1009    const_iterator end() const _NOEXCEPT {return __tree_.end();}
1010
1011    _LIBCPP_INLINE_VISIBILITY
1012          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1013    _LIBCPP_INLINE_VISIBILITY
1014    const_reverse_iterator rbegin() const _NOEXCEPT
1015        {return const_reverse_iterator(end());}
1016    _LIBCPP_INLINE_VISIBILITY
1017          reverse_iterator rend() _NOEXCEPT
1018            {return       reverse_iterator(begin());}
1019    _LIBCPP_INLINE_VISIBILITY
1020    const_reverse_iterator rend() const _NOEXCEPT
1021        {return const_reverse_iterator(begin());}
1022
1023    _LIBCPP_INLINE_VISIBILITY
1024    const_iterator cbegin() const _NOEXCEPT {return begin();}
1025    _LIBCPP_INLINE_VISIBILITY
1026    const_iterator cend() const _NOEXCEPT {return end();}
1027    _LIBCPP_INLINE_VISIBILITY
1028    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1029    _LIBCPP_INLINE_VISIBILITY
1030    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1031
1032    _LIBCPP_INLINE_VISIBILITY
1033    bool      empty() const _NOEXCEPT {return __tree_.size() == 0;}
1034    _LIBCPP_INLINE_VISIBILITY
1035    size_type size() const _NOEXCEPT {return __tree_.size();}
1036    _LIBCPP_INLINE_VISIBILITY
1037    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1038
1039    mapped_type& operator[](const key_type& __k);
1040#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1041    mapped_type& operator[](key_type&& __k);
1042#endif
1043
1044          mapped_type& at(const key_type& __k);
1045    const mapped_type& at(const key_type& __k) const;
1046
1047    _LIBCPP_INLINE_VISIBILITY
1048    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1049    _LIBCPP_INLINE_VISIBILITY
1050    key_compare    key_comp()      const {return __tree_.value_comp().key_comp();}
1051    _LIBCPP_INLINE_VISIBILITY
1052    value_compare  value_comp()    const {return value_compare(__tree_.value_comp().key_comp());}
1053
1054#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1055#ifndef _LIBCPP_HAS_NO_VARIADICS
1056
1057    template <class ..._Args>
1058        pair<iterator, bool>
1059        emplace(_Args&& ...__args);
1060
1061    template <class ..._Args>
1062        iterator
1063        emplace_hint(const_iterator __p, _Args&& ...__args);
1064
1065#endif  // _LIBCPP_HAS_NO_VARIADICS
1066
1067    template <class _Pp,
1068              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1069        _LIBCPP_INLINE_VISIBILITY
1070        pair<iterator, bool> insert(_Pp&& __p)
1071            {return __tree_.__insert_unique(_VSTD::forward<_Pp>(__p));}
1072
1073    template <class _Pp,
1074              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1075        _LIBCPP_INLINE_VISIBILITY
1076        iterator insert(const_iterator __pos, _Pp&& __p)
1077            {return __tree_.__insert_unique(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1078
1079#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1080
1081    _LIBCPP_INLINE_VISIBILITY
1082    pair<iterator, bool>
1083        insert(const value_type& __v) {return __tree_.__insert_unique(__v);}
1084
1085    _LIBCPP_INLINE_VISIBILITY
1086    iterator
1087        insert(const_iterator __p, const value_type& __v)
1088            {return __tree_.__insert_unique(__p.__i_, __v);}
1089
1090#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1091    _LIBCPP_INLINE_VISIBILITY
1092    pair<iterator, bool>
1093        insert(     value_type&& __v) {return __tree_.__insert_unique(_VSTD::forward<value_type>(__v));}
1094
1095    _LIBCPP_INLINE_VISIBILITY
1096    iterator
1097        insert(const_iterator __p,       value_type&& __v)
1098            {return __tree_.__insert_unique(__p.__i_, _VSTD::forward<value_type>(__v));}
1099#endif
1100
1101    template <class _InputIterator>
1102        _LIBCPP_INLINE_VISIBILITY
1103        void insert(_InputIterator __f, _InputIterator __l)
1104        {
1105            for (const_iterator __e = cend(); __f != __l; ++__f)
1106                insert(__e.__i_, *__f);
1107        }
1108
1109#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1110
1111    _LIBCPP_INLINE_VISIBILITY
1112    void insert(initializer_list<value_type> __il)
1113        {insert(__il.begin(), __il.end());}
1114
1115#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1116
1117#if _LIBCPP_STD_VER > 14
1118#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1119#ifndef _LIBCPP_HAS_NO_VARIADICS
1120    template <class... _Args>
1121        _LIBCPP_INLINE_VISIBILITY
1122        pair<iterator, bool> try_emplace(const key_type& __k, _Args&&... __args)
1123    {
1124        iterator __p = lower_bound(__k);
1125        if ( __p != end() && !key_comp()(__k, __p->first))
1126            return _VSTD::make_pair(__p, false);
1127        else
1128            return _VSTD::make_pair(
1129                      emplace_hint(__p,
1130                        _VSTD::piecewise_construct, _VSTD::forward_as_tuple(__k),
1131                        _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)),
1132                      true);
1133    }
1134
1135    template <class... _Args>
1136        _LIBCPP_INLINE_VISIBILITY
1137        pair<iterator, bool> try_emplace(key_type&& __k, _Args&&... __args)
1138    {
1139        iterator __p = lower_bound(__k);
1140        if ( __p != end() && !key_comp()(__k, __p->first))
1141            return _VSTD::make_pair(__p, false);
1142        else
1143            return _VSTD::make_pair(
1144                      emplace_hint(__p,
1145                        _VSTD::piecewise_construct, _VSTD::forward_as_tuple(_VSTD::move(__k)),
1146                        _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)),
1147                      true);
1148    }
1149
1150    template <class... _Args>
1151        _LIBCPP_INLINE_VISIBILITY
1152        iterator try_emplace(const_iterator __h, const key_type& __k, _Args&&... __args)
1153    {
1154        iterator __p = lower_bound(__k);
1155        if ( __p != end() && !key_comp()(__k, __p->first))
1156            return __p;
1157        else
1158            return emplace_hint(__p,
1159                      _VSTD::piecewise_construct, _VSTD::forward_as_tuple(__k),
1160                      _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1161    }
1162
1163    template <class... _Args>
1164        _LIBCPP_INLINE_VISIBILITY
1165        iterator try_emplace(const_iterator __h, key_type&& __k, _Args&&... __args)
1166    {
1167        iterator __p = lower_bound(__k);
1168        if ( __p != end() && !key_comp()(__k, __p->first))
1169            return __p;
1170        else
1171            return emplace_hint(__p,
1172                      _VSTD::piecewise_construct, _VSTD::forward_as_tuple(_VSTD::move(__k)),
1173                      _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1174    }
1175
1176    template <class _Vp>
1177        _LIBCPP_INLINE_VISIBILITY
1178        pair<iterator, bool> insert_or_assign(const key_type& __k, _Vp&& __v)
1179    {
1180        iterator __p = lower_bound(__k);
1181        if ( __p != end() && !key_comp()(__k, __p->first))
1182        {
1183            __p->second = _VSTD::forward<_Vp>(__v);
1184            return _VSTD::make_pair(__p, false);
1185        }
1186        return _VSTD::make_pair(emplace_hint(__p, __k, _VSTD::forward<_Vp>(__v)), true);
1187    }
1188
1189    template <class _Vp>
1190        _LIBCPP_INLINE_VISIBILITY
1191        pair<iterator, bool> insert_or_assign(key_type&& __k, _Vp&& __v)
1192    {
1193        iterator __p = lower_bound(__k);
1194        if ( __p != end() && !key_comp()(__k, __p->first))
1195        {
1196            __p->second = _VSTD::forward<_Vp>(__v);
1197            return _VSTD::make_pair(__p, false);
1198        }
1199        return _VSTD::make_pair(emplace_hint(__p, _VSTD::move(__k), _VSTD::forward<_Vp>(__v)), true);
1200    }
1201
1202    template <class _Vp>
1203        _LIBCPP_INLINE_VISIBILITY
1204        iterator insert_or_assign(const_iterator __h, const key_type& __k, _Vp&& __v)
1205     {
1206        iterator __p = lower_bound(__k);
1207        if ( __p != end() && !key_comp()(__k, __p->first))
1208        {
1209            __p->second = _VSTD::forward<_Vp>(__v);
1210            return __p;
1211        }
1212        return emplace_hint(__h, __k, _VSTD::forward<_Vp>(__v));
1213     }
1214
1215    template <class _Vp>
1216        _LIBCPP_INLINE_VISIBILITY
1217        iterator insert_or_assign(const_iterator __h, key_type&& __k, _Vp&& __v)
1218     {
1219        iterator __p = lower_bound(__k);
1220        if ( __p != end() && !key_comp()(__k, __p->first))
1221        {
1222            __p->second = _VSTD::forward<_Vp>(__v);
1223            return __p;
1224        }
1225        return emplace_hint(__h, _VSTD::move(__k), _VSTD::forward<_Vp>(__v));
1226     }
1227#endif
1228#endif
1229#endif
1230
1231    _LIBCPP_INLINE_VISIBILITY
1232    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1233    _LIBCPP_INLINE_VISIBILITY
1234    iterator erase(iterator __p)       {return __tree_.erase(__p.__i_);}
1235    _LIBCPP_INLINE_VISIBILITY
1236    size_type erase(const key_type& __k)
1237        {return __tree_.__erase_unique(__k);}
1238    _LIBCPP_INLINE_VISIBILITY
1239    iterator  erase(const_iterator __f, const_iterator __l)
1240        {return __tree_.erase(__f.__i_, __l.__i_);}
1241    _LIBCPP_INLINE_VISIBILITY
1242    void clear() _NOEXCEPT {__tree_.clear();}
1243
1244    _LIBCPP_INLINE_VISIBILITY
1245    void swap(map& __m)
1246        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1247        {__tree_.swap(__m.__tree_);}
1248
1249    _LIBCPP_INLINE_VISIBILITY
1250    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1251    _LIBCPP_INLINE_VISIBILITY
1252    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1253#if _LIBCPP_STD_VER > 11
1254    template <typename _K2>
1255    _LIBCPP_INLINE_VISIBILITY
1256    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1257    find(const _K2& __k)                           {return __tree_.find(__k);}
1258    template <typename _K2>
1259    _LIBCPP_INLINE_VISIBILITY
1260    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1261    find(const _K2& __k) const                     {return __tree_.find(__k);}
1262#endif
1263
1264    _LIBCPP_INLINE_VISIBILITY
1265    size_type      count(const key_type& __k) const
1266        {return __tree_.__count_unique(__k);}
1267#if _LIBCPP_STD_VER > 11
1268    template <typename _K2>
1269    _LIBCPP_INLINE_VISIBILITY
1270    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1271    count(const _K2& __k) const {return __tree_.__count_unique(__k);}
1272#endif
1273    _LIBCPP_INLINE_VISIBILITY
1274    iterator lower_bound(const key_type& __k)
1275        {return __tree_.lower_bound(__k);}
1276    _LIBCPP_INLINE_VISIBILITY
1277    const_iterator lower_bound(const key_type& __k) const
1278        {return __tree_.lower_bound(__k);}
1279#if _LIBCPP_STD_VER > 11
1280    template <typename _K2>
1281    _LIBCPP_INLINE_VISIBILITY
1282    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1283    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1284
1285    template <typename _K2>
1286    _LIBCPP_INLINE_VISIBILITY
1287    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1288    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1289#endif
1290
1291    _LIBCPP_INLINE_VISIBILITY
1292    iterator upper_bound(const key_type& __k)
1293        {return __tree_.upper_bound(__k);}
1294    _LIBCPP_INLINE_VISIBILITY
1295    const_iterator upper_bound(const key_type& __k) const
1296        {return __tree_.upper_bound(__k);}
1297#if _LIBCPP_STD_VER > 11
1298    template <typename _K2>
1299    _LIBCPP_INLINE_VISIBILITY
1300    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1301    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1302    template <typename _K2>
1303    _LIBCPP_INLINE_VISIBILITY
1304    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1305    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1306#endif
1307
1308    _LIBCPP_INLINE_VISIBILITY
1309    pair<iterator,iterator> equal_range(const key_type& __k)
1310        {return __tree_.__equal_range_unique(__k);}
1311    _LIBCPP_INLINE_VISIBILITY
1312    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1313        {return __tree_.__equal_range_unique(__k);}
1314#if _LIBCPP_STD_VER > 11
1315    template <typename _K2>
1316    _LIBCPP_INLINE_VISIBILITY
1317    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1318    equal_range(const _K2& __k)       {return __tree_.__equal_range_unique(__k);}
1319    template <typename _K2>
1320    _LIBCPP_INLINE_VISIBILITY
1321    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1322    equal_range(const _K2& __k) const {return __tree_.__equal_range_unique(__k);}
1323#endif
1324
1325private:
1326    typedef typename __base::__node                    __node;
1327    typedef typename __base::__node_allocator          __node_allocator;
1328    typedef typename __base::__node_pointer            __node_pointer;
1329    typedef typename __base::__node_base_pointer       __node_base_pointer;
1330
1331    typedef __map_node_destructor<__node_allocator> _Dp;
1332    typedef unique_ptr<__node, _Dp> __node_holder;
1333
1334#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1335    __node_holder __construct_node();
1336    template <class _A0>
1337        __node_holder __construct_node(_A0&& __a0);
1338    __node_holder __construct_node_with_key(key_type&& __k);
1339#ifndef _LIBCPP_HAS_NO_VARIADICS
1340    template <class _A0, class _A1, class ..._Args>
1341        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
1342#endif  // _LIBCPP_HAS_NO_VARIADICS
1343#endif
1344    __node_holder __construct_node_with_key(const key_type& __k);
1345
1346    __node_base_pointer const&
1347    __find_equal_key(__node_base_pointer& __parent, const key_type& __k) const;
1348
1349    _LIBCPP_INLINE_VISIBILITY
1350    __node_base_pointer&
1351    __find_equal_key(__node_base_pointer& __parent, const key_type& __k) {
1352        map const* __const_this = this;
1353        return const_cast<__node_base_pointer&>(
1354            __const_this->__find_equal_key(__parent, __k));
1355    }
1356};
1357
1358
1359// Find __k
1360// Set __parent to parent of null leaf and
1361//    return reference to null leaf iv __k does not exist.
1362// If __k exists, set parent to node of __k and return reference to node of __k
1363template <class _Key, class _Tp, class _Compare, class _Allocator>
1364typename map<_Key, _Tp, _Compare, _Allocator>::__node_base_pointer const&
1365map<_Key, _Tp, _Compare, _Allocator>::__find_equal_key(__node_base_pointer& __parent,
1366                                                       const key_type& __k) const
1367{
1368    __node_pointer __nd = __tree_.__root();
1369    if (__nd != nullptr)
1370    {
1371        while (true)
1372        {
1373            if (__tree_.value_comp().key_comp()(__k, __nd->__value_.__cc.first))
1374            {
1375                if (__nd->__left_ != nullptr)
1376                    __nd = static_cast<__node_pointer>(__nd->__left_);
1377                else
1378                {
1379                    __parent = static_cast<__node_base_pointer>(__nd);
1380                    return __parent->__left_;
1381                }
1382            }
1383            else if (__tree_.value_comp().key_comp()(__nd->__value_.__cc.first, __k))
1384            {
1385                if (__nd->__right_ != nullptr)
1386                    __nd = static_cast<__node_pointer>(__nd->__right_);
1387                else
1388                {
1389                    __parent = static_cast<__node_base_pointer>(__nd);
1390                    return __parent->__right_;
1391                }
1392            }
1393            else
1394            {
1395                __parent = static_cast<__node_base_pointer>(__nd);
1396                return __parent;
1397            }
1398        }
1399    }
1400    __parent = static_cast<__node_base_pointer>(__tree_.__end_node());
1401    return __parent->__left_;
1402}
1403
1404#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1405
1406template <class _Key, class _Tp, class _Compare, class _Allocator>
1407map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
1408    : __tree_(_VSTD::move(__m.__tree_), __a)
1409{
1410    if (__a != __m.get_allocator())
1411    {
1412        const_iterator __e = cend();
1413        while (!__m.empty())
1414            __tree_.__insert_unique(__e.__i_,
1415                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
1416    }
1417}
1418
1419template <class _Key, class _Tp, class _Compare, class _Allocator>
1420typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1421map<_Key, _Tp, _Compare, _Allocator>::__construct_node()
1422{
1423    __node_allocator& __na = __tree_.__node_alloc();
1424    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1425    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
1426    __h.get_deleter().__first_constructed = true;
1427    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1428    __h.get_deleter().__second_constructed = true;
1429    return __h;
1430}
1431
1432template <class _Key, class _Tp, class _Compare, class _Allocator>
1433template <class _A0>
1434typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1435map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
1436{
1437    __node_allocator& __na = __tree_.__node_alloc();
1438    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1439    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
1440    __h.get_deleter().__first_constructed = true;
1441    __h.get_deleter().__second_constructed = true;
1442    return __h;
1443}
1444
1445template <class _Key, class _Tp, class _Compare, class _Allocator>
1446typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1447map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(key_type&& __k)
1448{
1449    __node_allocator& __na = __tree_.__node_alloc();
1450    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1451    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), _VSTD::move(__k));
1452    __h.get_deleter().__first_constructed = true;
1453    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1454    __h.get_deleter().__second_constructed = true;
1455    return __h;
1456}
1457
1458#ifndef _LIBCPP_HAS_NO_VARIADICS
1459
1460template <class _Key, class _Tp, class _Compare, class _Allocator>
1461template <class _A0, class _A1, class ..._Args>
1462typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1463map<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
1464{
1465    __node_allocator& __na = __tree_.__node_alloc();
1466    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1467    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
1468                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
1469                             _VSTD::forward<_Args>(__args)...);
1470    __h.get_deleter().__first_constructed = true;
1471    __h.get_deleter().__second_constructed = true;
1472    return __h;
1473}
1474
1475#endif  // _LIBCPP_HAS_NO_VARIADICS
1476
1477#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1478
1479template <class _Key, class _Tp, class _Compare, class _Allocator>
1480typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1481map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type& __k)
1482{
1483    __node_allocator& __na = __tree_.__node_alloc();
1484    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1485    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
1486    __h.get_deleter().__first_constructed = true;
1487    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1488    __h.get_deleter().__second_constructed = true;
1489    return _LIBCPP_EXPLICIT_MOVE(__h);  // explicitly moved for C++03
1490}
1491
1492template <class _Key, class _Tp, class _Compare, class _Allocator>
1493_Tp&
1494map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
1495{
1496    __node_base_pointer __parent;
1497    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1498    __node_pointer __r = static_cast<__node_pointer>(__child);
1499    if (__child == nullptr)
1500    {
1501        __node_holder __h = __construct_node_with_key(__k);
1502        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1503        __r = __h.release();
1504    }
1505    return __r->__value_.__cc.second;
1506}
1507
1508#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1509
1510template <class _Key, class _Tp, class _Compare, class _Allocator>
1511_Tp&
1512map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k)
1513{
1514    __node_base_pointer __parent;
1515    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1516    __node_pointer __r = static_cast<__node_pointer>(__child);
1517    if (__child == nullptr)
1518    {
1519        __node_holder __h = __construct_node_with_key(_VSTD::move(__k));
1520        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1521        __r = __h.release();
1522    }
1523    return __r->__value_.__cc.second;
1524}
1525
1526#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1527
1528template <class _Key, class _Tp, class _Compare, class _Allocator>
1529_Tp&
1530map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k)
1531{
1532    __node_base_pointer __parent;
1533    __node_base_pointer& __child = __find_equal_key(__parent, __k);
1534#ifndef _LIBCPP_NO_EXCEPTIONS
1535    if (__child == nullptr)
1536        throw out_of_range("map::at:  key not found");
1537#endif  // _LIBCPP_NO_EXCEPTIONS
1538    return static_cast<__node_pointer>(__child)->__value_.__cc.second;
1539}
1540
1541template <class _Key, class _Tp, class _Compare, class _Allocator>
1542const _Tp&
1543map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const
1544{
1545    __node_base_pointer __parent;
1546    __node_base_pointer __child = __find_equal_key(__parent, __k);
1547#ifndef _LIBCPP_NO_EXCEPTIONS
1548    if (__child == nullptr)
1549        throw out_of_range("map::at:  key not found");
1550#endif  // _LIBCPP_NO_EXCEPTIONS
1551    return static_cast<__node_pointer>(__child)->__value_.__cc.second;
1552}
1553
1554#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1555
1556template <class _Key, class _Tp, class _Compare, class _Allocator>
1557template <class ..._Args>
1558pair<typename map<_Key, _Tp, _Compare, _Allocator>::iterator, bool>
1559map<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
1560{
1561    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1562    pair<iterator, bool> __r = __tree_.__node_insert_unique(__h.get());
1563    if (__r.second)
1564        __h.release();
1565    return __r;
1566}
1567
1568template <class _Key, class _Tp, class _Compare, class _Allocator>
1569template <class ..._Args>
1570typename map<_Key, _Tp, _Compare, _Allocator>::iterator
1571map<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
1572                                                   _Args&& ...__args)
1573{
1574    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
1575    iterator __r = __tree_.__node_insert_unique(__p.__i_, __h.get());
1576    if (__r.__i_.__ptr_ == __h.get())
1577        __h.release();
1578    return __r;
1579}
1580
1581#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1582
1583template <class _Key, class _Tp, class _Compare, class _Allocator>
1584inline _LIBCPP_INLINE_VISIBILITY
1585bool
1586operator==(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1587           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1588{
1589    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1590}
1591
1592template <class _Key, class _Tp, class _Compare, class _Allocator>
1593inline _LIBCPP_INLINE_VISIBILITY
1594bool
1595operator< (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1596           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1597{
1598    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1599}
1600
1601template <class _Key, class _Tp, class _Compare, class _Allocator>
1602inline _LIBCPP_INLINE_VISIBILITY
1603bool
1604operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1605           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1606{
1607    return !(__x == __y);
1608}
1609
1610template <class _Key, class _Tp, class _Compare, class _Allocator>
1611inline _LIBCPP_INLINE_VISIBILITY
1612bool
1613operator> (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1614           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1615{
1616    return __y < __x;
1617}
1618
1619template <class _Key, class _Tp, class _Compare, class _Allocator>
1620inline _LIBCPP_INLINE_VISIBILITY
1621bool
1622operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1623           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1624{
1625    return !(__x < __y);
1626}
1627
1628template <class _Key, class _Tp, class _Compare, class _Allocator>
1629inline _LIBCPP_INLINE_VISIBILITY
1630bool
1631operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1632           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1633{
1634    return !(__y < __x);
1635}
1636
1637template <class _Key, class _Tp, class _Compare, class _Allocator>
1638inline _LIBCPP_INLINE_VISIBILITY
1639void
1640swap(map<_Key, _Tp, _Compare, _Allocator>& __x,
1641     map<_Key, _Tp, _Compare, _Allocator>& __y)
1642    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
1643{
1644    __x.swap(__y);
1645}
1646
1647template <class _Key, class _Tp, class _Compare = less<_Key>,
1648          class _Allocator = allocator<pair<const _Key, _Tp> > >
1649class _LIBCPP_TYPE_VIS_ONLY multimap
1650{
1651public:
1652    // types:
1653    typedef _Key                                     key_type;
1654    typedef _Tp                                      mapped_type;
1655    typedef pair<const key_type, mapped_type>        value_type;
1656    typedef pair<key_type, mapped_type>              __nc_value_type;
1657    typedef _Compare                                 key_compare;
1658    typedef _Allocator                               allocator_type;
1659    typedef value_type&                              reference;
1660    typedef const value_type&                        const_reference;
1661
1662    static_assert((is_same<typename allocator_type::value_type, value_type>::value),
1663                  "Allocator::value_type must be same type as value_type");
1664
1665    class _LIBCPP_TYPE_VIS_ONLY value_compare
1666        : public binary_function<value_type, value_type, bool>
1667    {
1668        friend class multimap;
1669    protected:
1670        key_compare comp;
1671
1672        _LIBCPP_INLINE_VISIBILITY
1673        value_compare(key_compare c) : comp(c) {}
1674    public:
1675        _LIBCPP_INLINE_VISIBILITY
1676        bool operator()(const value_type& __x, const value_type& __y) const
1677            {return comp(__x.first, __y.first);}
1678    };
1679
1680private:
1681
1682    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
1683    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
1684    typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>,
1685                                                 __value_type>::type __allocator_type;
1686    typedef __tree<__value_type, __vc, __allocator_type>            __base;
1687    typedef typename __base::__node_traits                          __node_traits;
1688    typedef allocator_traits<allocator_type>                        __alloc_traits;
1689
1690    __base __tree_;
1691
1692public:
1693    typedef typename __alloc_traits::pointer               pointer;
1694    typedef typename __alloc_traits::const_pointer         const_pointer;
1695    typedef typename __alloc_traits::size_type             size_type;
1696    typedef typename __alloc_traits::difference_type       difference_type;
1697    typedef __map_iterator<typename __base::iterator>      iterator;
1698    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
1699    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
1700    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
1701
1702    _LIBCPP_INLINE_VISIBILITY
1703    multimap()
1704        _NOEXCEPT_(
1705            is_nothrow_default_constructible<allocator_type>::value &&
1706            is_nothrow_default_constructible<key_compare>::value &&
1707            is_nothrow_copy_constructible<key_compare>::value)
1708        : __tree_(__vc(key_compare())) {}
1709
1710    _LIBCPP_INLINE_VISIBILITY
1711    explicit multimap(const key_compare& __comp)
1712        _NOEXCEPT_(
1713            is_nothrow_default_constructible<allocator_type>::value &&
1714            is_nothrow_copy_constructible<key_compare>::value)
1715        : __tree_(__vc(__comp)) {}
1716
1717    _LIBCPP_INLINE_VISIBILITY
1718    explicit multimap(const key_compare& __comp, const allocator_type& __a)
1719        : __tree_(__vc(__comp), __a) {}
1720
1721    template <class _InputIterator>
1722        _LIBCPP_INLINE_VISIBILITY
1723        multimap(_InputIterator __f, _InputIterator __l,
1724            const key_compare& __comp = key_compare())
1725        : __tree_(__vc(__comp))
1726        {
1727            insert(__f, __l);
1728        }
1729
1730    template <class _InputIterator>
1731        _LIBCPP_INLINE_VISIBILITY
1732        multimap(_InputIterator __f, _InputIterator __l,
1733            const key_compare& __comp, const allocator_type& __a)
1734        : __tree_(__vc(__comp), __a)
1735        {
1736            insert(__f, __l);
1737        }
1738
1739#if _LIBCPP_STD_VER > 11
1740    template <class _InputIterator>
1741    _LIBCPP_INLINE_VISIBILITY
1742    multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
1743        : multimap(__f, __l, key_compare(), __a) {}
1744#endif
1745
1746    _LIBCPP_INLINE_VISIBILITY
1747    multimap(const multimap& __m)
1748        : __tree_(__m.__tree_.value_comp(),
1749          __alloc_traits::select_on_container_copy_construction(__m.__tree_.__alloc()))
1750        {
1751            insert(__m.begin(), __m.end());
1752        }
1753
1754    _LIBCPP_INLINE_VISIBILITY
1755    multimap& operator=(const multimap& __m)
1756        {
1757#if __cplusplus >= 201103L
1758            __tree_ = __m.__tree_;
1759#else
1760            if (this != &__m) {
1761                __tree_.clear();
1762                __tree_.value_comp() = __m.__tree_.value_comp();
1763                __tree_.__copy_assign_alloc(__m.__tree_);
1764                insert(__m.begin(), __m.end());
1765            }
1766#endif
1767            return *this;
1768        }
1769
1770#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1771
1772    _LIBCPP_INLINE_VISIBILITY
1773    multimap(multimap&& __m)
1774        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
1775        : __tree_(_VSTD::move(__m.__tree_))
1776        {
1777        }
1778
1779    multimap(multimap&& __m, const allocator_type& __a);
1780
1781    _LIBCPP_INLINE_VISIBILITY
1782    multimap& operator=(multimap&& __m)
1783        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
1784        {
1785            __tree_ = _VSTD::move(__m.__tree_);
1786            return *this;
1787        }
1788
1789#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1790
1791#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1792
1793    _LIBCPP_INLINE_VISIBILITY
1794    multimap(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
1795        : __tree_(__vc(__comp))
1796        {
1797            insert(__il.begin(), __il.end());
1798        }
1799
1800    _LIBCPP_INLINE_VISIBILITY
1801    multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
1802        : __tree_(__vc(__comp), __a)
1803        {
1804            insert(__il.begin(), __il.end());
1805        }
1806
1807#if _LIBCPP_STD_VER > 11
1808    _LIBCPP_INLINE_VISIBILITY
1809    multimap(initializer_list<value_type> __il, const allocator_type& __a)
1810        : multimap(__il, key_compare(), __a) {}
1811#endif
1812
1813    _LIBCPP_INLINE_VISIBILITY
1814    multimap& operator=(initializer_list<value_type> __il)
1815        {
1816            __tree_.__assign_multi(__il.begin(), __il.end());
1817            return *this;
1818        }
1819
1820#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1821
1822    _LIBCPP_INLINE_VISIBILITY
1823    explicit multimap(const allocator_type& __a)
1824        : __tree_(__a)
1825        {
1826        }
1827
1828    _LIBCPP_INLINE_VISIBILITY
1829    multimap(const multimap& __m, const allocator_type& __a)
1830        : __tree_(__m.__tree_.value_comp(), __a)
1831        {
1832            insert(__m.begin(), __m.end());
1833        }
1834
1835    _LIBCPP_INLINE_VISIBILITY
1836          iterator begin() _NOEXCEPT {return __tree_.begin();}
1837    _LIBCPP_INLINE_VISIBILITY
1838    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
1839    _LIBCPP_INLINE_VISIBILITY
1840          iterator end() _NOEXCEPT {return __tree_.end();}
1841    _LIBCPP_INLINE_VISIBILITY
1842    const_iterator end() const _NOEXCEPT {return __tree_.end();}
1843
1844    _LIBCPP_INLINE_VISIBILITY
1845          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1846    _LIBCPP_INLINE_VISIBILITY
1847    const_reverse_iterator rbegin() const _NOEXCEPT
1848        {return const_reverse_iterator(end());}
1849    _LIBCPP_INLINE_VISIBILITY
1850          reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
1851    _LIBCPP_INLINE_VISIBILITY
1852    const_reverse_iterator rend() const _NOEXCEPT
1853        {return const_reverse_iterator(begin());}
1854
1855    _LIBCPP_INLINE_VISIBILITY
1856    const_iterator cbegin()  const _NOEXCEPT {return begin();}
1857    _LIBCPP_INLINE_VISIBILITY
1858    const_iterator cend() const _NOEXCEPT {return end();}
1859    _LIBCPP_INLINE_VISIBILITY
1860    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1861    _LIBCPP_INLINE_VISIBILITY
1862    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1863
1864    _LIBCPP_INLINE_VISIBILITY
1865    bool empty() const _NOEXCEPT {return __tree_.size() == 0;}
1866    _LIBCPP_INLINE_VISIBILITY
1867    size_type size() const _NOEXCEPT {return __tree_.size();}
1868    _LIBCPP_INLINE_VISIBILITY
1869    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1870
1871    _LIBCPP_INLINE_VISIBILITY
1872    allocator_type get_allocator() const _NOEXCEPT {return __tree_.__alloc();}
1873    _LIBCPP_INLINE_VISIBILITY
1874    key_compare    key_comp() const {return __tree_.value_comp().key_comp();}
1875    _LIBCPP_INLINE_VISIBILITY
1876    value_compare  value_comp() const
1877        {return value_compare(__tree_.value_comp().key_comp());}
1878
1879#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1880#ifndef _LIBCPP_HAS_NO_VARIADICS
1881
1882    template <class ..._Args>
1883        iterator
1884        emplace(_Args&& ...__args);
1885
1886    template <class ..._Args>
1887        iterator
1888        emplace_hint(const_iterator __p, _Args&& ...__args);
1889
1890#endif  // _LIBCPP_HAS_NO_VARIADICS
1891
1892    template <class _Pp,
1893              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1894        _LIBCPP_INLINE_VISIBILITY
1895        iterator insert(_Pp&& __p)
1896            {return __tree_.__insert_multi(_VSTD::forward<_Pp>(__p));}
1897
1898    template <class _Pp,
1899              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1900        _LIBCPP_INLINE_VISIBILITY
1901        iterator insert(const_iterator __pos, _Pp&& __p)
1902            {return __tree_.__insert_multi(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1903
1904#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1905
1906    _LIBCPP_INLINE_VISIBILITY
1907    iterator insert(const value_type& __v) {return __tree_.__insert_multi(__v);}
1908
1909    _LIBCPP_INLINE_VISIBILITY
1910    iterator insert(const_iterator __p, const value_type& __v)
1911            {return __tree_.__insert_multi(__p.__i_, __v);}
1912
1913#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1914    _LIBCPP_INLINE_VISIBILITY
1915    iterator insert( value_type&& __v) {return __tree_.__insert_multi(_VSTD::forward<value_type>(__v));}
1916
1917    _LIBCPP_INLINE_VISIBILITY
1918    iterator insert(const_iterator __p, value_type&& __v)
1919            {return __tree_.__insert_multi(__p.__i_, _VSTD::forward<value_type>(__v));}
1920#endif
1921
1922    template <class _InputIterator>
1923        _LIBCPP_INLINE_VISIBILITY
1924        void insert(_InputIterator __f, _InputIterator __l)
1925        {
1926            for (const_iterator __e = cend(); __f != __l; ++__f)
1927                __tree_.__insert_multi(__e.__i_, *__f);
1928        }
1929
1930#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1931
1932    _LIBCPP_INLINE_VISIBILITY
1933    void insert(initializer_list<value_type> __il)
1934        {insert(__il.begin(), __il.end());}
1935
1936#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1937
1938    _LIBCPP_INLINE_VISIBILITY
1939    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1940    _LIBCPP_INLINE_VISIBILITY
1941    iterator erase(iterator __p)       {return __tree_.erase(__p.__i_);}
1942    _LIBCPP_INLINE_VISIBILITY
1943    size_type erase(const key_type& __k) {return __tree_.__erase_multi(__k);}
1944    _LIBCPP_INLINE_VISIBILITY
1945    iterator  erase(const_iterator __f, const_iterator __l)
1946        {return __tree_.erase(__f.__i_, __l.__i_);}
1947    _LIBCPP_INLINE_VISIBILITY
1948    void clear() {__tree_.clear();}
1949
1950    _LIBCPP_INLINE_VISIBILITY
1951    void swap(multimap& __m)
1952        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1953        {__tree_.swap(__m.__tree_);}
1954
1955    _LIBCPP_INLINE_VISIBILITY
1956    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1957    _LIBCPP_INLINE_VISIBILITY
1958    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1959#if _LIBCPP_STD_VER > 11
1960    template <typename _K2>
1961    _LIBCPP_INLINE_VISIBILITY
1962    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1963    find(const _K2& __k)                           {return __tree_.find(__k);}
1964    template <typename _K2>
1965    _LIBCPP_INLINE_VISIBILITY
1966    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1967    find(const _K2& __k) const                     {return __tree_.find(__k);}
1968#endif
1969
1970    _LIBCPP_INLINE_VISIBILITY
1971    size_type      count(const key_type& __k) const
1972        {return __tree_.__count_multi(__k);}
1973#if _LIBCPP_STD_VER > 11
1974    template <typename _K2>
1975    _LIBCPP_INLINE_VISIBILITY
1976    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1977    count(const _K2& __k) const {return __tree_.__count_multi(__k);}
1978#endif
1979    _LIBCPP_INLINE_VISIBILITY
1980    iterator lower_bound(const key_type& __k)
1981        {return __tree_.lower_bound(__k);}
1982    _LIBCPP_INLINE_VISIBILITY
1983    const_iterator lower_bound(const key_type& __k) const
1984            {return __tree_.lower_bound(__k);}
1985#if _LIBCPP_STD_VER > 11
1986    template <typename _K2>
1987    _LIBCPP_INLINE_VISIBILITY
1988    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1989    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1990
1991    template <typename _K2>
1992    _LIBCPP_INLINE_VISIBILITY
1993    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1994    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1995#endif
1996
1997    _LIBCPP_INLINE_VISIBILITY
1998    iterator upper_bound(const key_type& __k)
1999            {return __tree_.upper_bound(__k);}
2000    _LIBCPP_INLINE_VISIBILITY
2001    const_iterator upper_bound(const key_type& __k) const
2002            {return __tree_.upper_bound(__k);}
2003#if _LIBCPP_STD_VER > 11
2004    template <typename _K2>
2005    _LIBCPP_INLINE_VISIBILITY
2006    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
2007    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
2008    template <typename _K2>
2009    _LIBCPP_INLINE_VISIBILITY
2010    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
2011    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
2012#endif
2013
2014    _LIBCPP_INLINE_VISIBILITY
2015    pair<iterator,iterator>             equal_range(const key_type& __k)
2016            {return __tree_.__equal_range_multi(__k);}
2017    _LIBCPP_INLINE_VISIBILITY
2018    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
2019            {return __tree_.__equal_range_multi(__k);}
2020#if _LIBCPP_STD_VER > 11
2021    template <typename _K2>
2022    _LIBCPP_INLINE_VISIBILITY
2023    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
2024    equal_range(const _K2& __k)       {return __tree_.__equal_range_multi(__k);}
2025    template <typename _K2>
2026    _LIBCPP_INLINE_VISIBILITY
2027    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
2028    equal_range(const _K2& __k) const {return __tree_.__equal_range_multi(__k);}
2029#endif
2030
2031private:
2032    typedef typename __base::__node                    __node;
2033    typedef typename __base::__node_allocator          __node_allocator;
2034    typedef typename __base::__node_pointer            __node_pointer;
2035
2036    typedef __map_node_destructor<__node_allocator> _Dp;
2037    typedef unique_ptr<__node, _Dp> __node_holder;
2038
2039#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
2040    __node_holder __construct_node();
2041    template <class _A0>
2042        __node_holder
2043         __construct_node(_A0&& __a0);
2044#ifndef _LIBCPP_HAS_NO_VARIADICS
2045    template <class _A0, class _A1, class ..._Args>
2046        __node_holder __construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args);
2047#endif  // _LIBCPP_HAS_NO_VARIADICS
2048#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
2049};
2050
2051#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
2052
2053template <class _Key, class _Tp, class _Compare, class _Allocator>
2054multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a)
2055    : __tree_(_VSTD::move(__m.__tree_), __a)
2056{
2057    if (__a != __m.get_allocator())
2058    {
2059        const_iterator __e = cend();
2060        while (!__m.empty())
2061            __tree_.__insert_multi(__e.__i_,
2062                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_));
2063    }
2064}
2065
2066template <class _Key, class _Tp, class _Compare, class _Allocator>
2067typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
2068multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node()
2069{
2070    __node_allocator& __na = __tree_.__node_alloc();
2071    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
2072    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first));
2073    __h.get_deleter().__first_constructed = true;
2074    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
2075    __h.get_deleter().__second_constructed = true;
2076    return __h;
2077}
2078
2079template <class _Key, class _Tp, class _Compare, class _Allocator>
2080template <class _A0>
2081typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
2082multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0)
2083{
2084    __node_allocator& __na = __tree_.__node_alloc();
2085    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
2086    __node_traits::construct(__na, _VSTD::addressof(__h->__value_), _VSTD::forward<_A0>(__a0));
2087    __h.get_deleter().__first_constructed = true;
2088    __h.get_deleter().__second_constructed = true;
2089    return __h;
2090}
2091
2092#ifndef _LIBCPP_HAS_NO_VARIADICS
2093
2094template <class _Key, class _Tp, class _Compare, class _Allocator>
2095template <class _A0, class _A1, class ..._Args>
2096typename multimap<_Key, _Tp, _Compare, _Allocator>::__node_holder
2097multimap<_Key, _Tp, _Compare, _Allocator>::__construct_node(_A0&& __a0, _A1&& __a1, _Args&& ...__args)
2098{
2099    __node_allocator& __na = __tree_.__node_alloc();
2100    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
2101    __node_traits::construct(__na, _VSTD::addressof(__h->__value_),
2102                             _VSTD::forward<_A0>(__a0), _VSTD::forward<_A1>(__a1),
2103                             _VSTD::forward<_Args>(__args)...);
2104    __h.get_deleter().__first_constructed = true;
2105    __h.get_deleter().__second_constructed = true;
2106    return __h;
2107}
2108
2109#endif  // _LIBCPP_HAS_NO_VARIADICS
2110#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
2111
2112#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
2113
2114template <class _Key, class _Tp, class _Compare, class _Allocator>
2115template <class ..._Args>
2116typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
2117multimap<_Key, _Tp, _Compare, _Allocator>::emplace(_Args&& ...__args)
2118{
2119    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2120    iterator __r = __tree_.__node_insert_multi(__h.get());
2121    __h.release();
2122    return __r;
2123}
2124
2125template <class _Key, class _Tp, class _Compare, class _Allocator>
2126template <class ..._Args>
2127typename multimap<_Key, _Tp, _Compare, _Allocator>::iterator
2128multimap<_Key, _Tp, _Compare, _Allocator>::emplace_hint(const_iterator __p,
2129                                                        _Args&& ...__args)
2130{
2131    __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2132    iterator __r = __tree_.__node_insert_multi(__p.__i_, __h.get());
2133    __h.release();
2134    return __r;
2135}
2136
2137#endif  // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
2138
2139template <class _Key, class _Tp, class _Compare, class _Allocator>
2140inline _LIBCPP_INLINE_VISIBILITY
2141bool
2142operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2143           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2144{
2145    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
2146}
2147
2148template <class _Key, class _Tp, class _Compare, class _Allocator>
2149inline _LIBCPP_INLINE_VISIBILITY
2150bool
2151operator< (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2152           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2153{
2154    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
2155}
2156
2157template <class _Key, class _Tp, class _Compare, class _Allocator>
2158inline _LIBCPP_INLINE_VISIBILITY
2159bool
2160operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2161           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2162{
2163    return !(__x == __y);
2164}
2165
2166template <class _Key, class _Tp, class _Compare, class _Allocator>
2167inline _LIBCPP_INLINE_VISIBILITY
2168bool
2169operator> (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2170           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2171{
2172    return __y < __x;
2173}
2174
2175template <class _Key, class _Tp, class _Compare, class _Allocator>
2176inline _LIBCPP_INLINE_VISIBILITY
2177bool
2178operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2179           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2180{
2181    return !(__x < __y);
2182}
2183
2184template <class _Key, class _Tp, class _Compare, class _Allocator>
2185inline _LIBCPP_INLINE_VISIBILITY
2186bool
2187operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2188           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2189{
2190    return !(__y < __x);
2191}
2192
2193template <class _Key, class _Tp, class _Compare, class _Allocator>
2194inline _LIBCPP_INLINE_VISIBILITY
2195void
2196swap(multimap<_Key, _Tp, _Compare, _Allocator>& __x,
2197     multimap<_Key, _Tp, _Compare, _Allocator>& __y)
2198    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
2199{
2200    __x.swap(__y);
2201}
2202
2203_LIBCPP_END_NAMESPACE_STD
2204
2205#endif  // _LIBCPP_MAP
2206