xref: /freebsd-12.1/contrib/libc++/include/map (revision cc65eb4e)
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    _LIBCPP_INLINE_VISIBILITY
630    __value_type& operator=(const __value_type& __v)
631        {__nc = __v.__cc; return *this;}
632
633    _LIBCPP_INLINE_VISIBILITY
634    __value_type& operator=(__value_type&& __v)
635        {__nc = _VSTD::move(__v.__nc); return *this;}
636
637    template <class _ValueTp,
638              class = typename enable_if<
639                    __is_same_uncvref<_ValueTp, value_type>::value
640                 >::type
641             >
642    _LIBCPP_INLINE_VISIBILITY
643    __value_type& operator=(_ValueTp&& __v) {
644        __nc = _VSTD::forward<_ValueTp>(__v); return *this;
645    }
646
647private:
648    __value_type() _LIBCPP_EQUAL_DELETE;
649    ~__value_type() _LIBCPP_EQUAL_DELETE;
650    __value_type(const __value_type& __v) _LIBCPP_EQUAL_DELETE;
651    __value_type(__value_type&& __v) _LIBCPP_EQUAL_DELETE;
652};
653
654#else
655
656template <class _Key, class _Tp>
657struct __value_type
658{
659    typedef _Key                                     key_type;
660    typedef _Tp                                      mapped_type;
661    typedef pair<const key_type, mapped_type>        value_type;
662
663    value_type __cc;
664
665private:
666   __value_type();
667   __value_type(__value_type const&);
668   __value_type& operator=(__value_type const&);
669   ~__value_type();
670};
671
672#endif
673
674template <class _Tp>
675struct __extract_key_value_types;
676
677template <class _Key, class _Tp>
678struct __extract_key_value_types<__value_type<_Key, _Tp> >
679{
680  typedef _Key const __key_type;
681  typedef _Tp        __mapped_type;
682};
683
684template <class _TreeIterator>
685class _LIBCPP_TEMPLATE_VIS __map_iterator
686{
687    typedef typename _TreeIterator::_NodeTypes                   _NodeTypes;
688    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
689
690    _TreeIterator __i_;
691
692public:
693    typedef bidirectional_iterator_tag                           iterator_category;
694    typedef typename _NodeTypes::__map_value_type                value_type;
695    typedef typename _TreeIterator::difference_type              difference_type;
696    typedef value_type&                                          reference;
697    typedef typename _NodeTypes::__map_value_type_pointer        pointer;
698
699    _LIBCPP_INLINE_VISIBILITY
700    __map_iterator() _NOEXCEPT {}
701
702    _LIBCPP_INLINE_VISIBILITY
703    __map_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
704
705    _LIBCPP_INLINE_VISIBILITY
706    reference operator*() const {return __i_->__cc;}
707    _LIBCPP_INLINE_VISIBILITY
708    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
709
710    _LIBCPP_INLINE_VISIBILITY
711    __map_iterator& operator++() {++__i_; return *this;}
712    _LIBCPP_INLINE_VISIBILITY
713    __map_iterator operator++(int)
714    {
715        __map_iterator __t(*this);
716        ++(*this);
717        return __t;
718    }
719
720    _LIBCPP_INLINE_VISIBILITY
721    __map_iterator& operator--() {--__i_; return *this;}
722    _LIBCPP_INLINE_VISIBILITY
723    __map_iterator operator--(int)
724    {
725        __map_iterator __t(*this);
726        --(*this);
727        return __t;
728    }
729
730    friend _LIBCPP_INLINE_VISIBILITY
731    bool operator==(const __map_iterator& __x, const __map_iterator& __y)
732        {return __x.__i_ == __y.__i_;}
733    friend
734    _LIBCPP_INLINE_VISIBILITY
735    bool operator!=(const __map_iterator& __x, const __map_iterator& __y)
736        {return __x.__i_ != __y.__i_;}
737
738    template <class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS map;
739    template <class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS multimap;
740    template <class> friend class _LIBCPP_TEMPLATE_VIS __map_const_iterator;
741};
742
743template <class _TreeIterator>
744class _LIBCPP_TEMPLATE_VIS __map_const_iterator
745{
746    typedef typename _TreeIterator::_NodeTypes                   _NodeTypes;
747    typedef typename _TreeIterator::__pointer_traits             __pointer_traits;
748
749    _TreeIterator __i_;
750
751public:
752    typedef bidirectional_iterator_tag                           iterator_category;
753    typedef typename _NodeTypes::__map_value_type                value_type;
754    typedef typename _TreeIterator::difference_type              difference_type;
755    typedef const value_type&                                    reference;
756    typedef typename _NodeTypes::__const_map_value_type_pointer  pointer;
757
758    _LIBCPP_INLINE_VISIBILITY
759    __map_const_iterator() _NOEXCEPT {}
760
761    _LIBCPP_INLINE_VISIBILITY
762    __map_const_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {}
763    _LIBCPP_INLINE_VISIBILITY
764    __map_const_iterator(__map_iterator<
765        typename _TreeIterator::__non_const_iterator> __i) _NOEXCEPT
766        : __i_(__i.__i_) {}
767
768    _LIBCPP_INLINE_VISIBILITY
769    reference operator*() const {return __i_->__cc;}
770    _LIBCPP_INLINE_VISIBILITY
771    pointer operator->() const {return pointer_traits<pointer>::pointer_to(__i_->__cc);}
772
773    _LIBCPP_INLINE_VISIBILITY
774    __map_const_iterator& operator++() {++__i_; return *this;}
775    _LIBCPP_INLINE_VISIBILITY
776    __map_const_iterator operator++(int)
777    {
778        __map_const_iterator __t(*this);
779        ++(*this);
780        return __t;
781    }
782
783    _LIBCPP_INLINE_VISIBILITY
784    __map_const_iterator& operator--() {--__i_; return *this;}
785    _LIBCPP_INLINE_VISIBILITY
786    __map_const_iterator operator--(int)
787    {
788        __map_const_iterator __t(*this);
789        --(*this);
790        return __t;
791    }
792
793    friend _LIBCPP_INLINE_VISIBILITY
794    bool operator==(const __map_const_iterator& __x, const __map_const_iterator& __y)
795        {return __x.__i_ == __y.__i_;}
796    friend _LIBCPP_INLINE_VISIBILITY
797    bool operator!=(const __map_const_iterator& __x, const __map_const_iterator& __y)
798        {return __x.__i_ != __y.__i_;}
799
800    template <class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS map;
801    template <class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS multimap;
802    template <class, class, class> friend class _LIBCPP_TEMPLATE_VIS __tree_const_iterator;
803};
804
805template <class _Key, class _Tp, class _Compare = less<_Key>,
806          class _Allocator = allocator<pair<const _Key, _Tp> > >
807class _LIBCPP_TEMPLATE_VIS map
808{
809public:
810    // types:
811    typedef _Key                                     key_type;
812    typedef _Tp                                      mapped_type;
813    typedef pair<const key_type, mapped_type>        value_type;
814    typedef pair<key_type, mapped_type>              __nc_value_type;
815    typedef _Compare                                 key_compare;
816    typedef _Allocator                               allocator_type;
817    typedef value_type&                              reference;
818    typedef const value_type&                        const_reference;
819
820    static_assert((is_same<typename allocator_type::value_type, value_type>::value),
821                  "Allocator::value_type must be same type as value_type");
822
823    class _LIBCPP_TEMPLATE_VIS value_compare
824        : public binary_function<value_type, value_type, bool>
825    {
826        friend class map;
827    protected:
828        key_compare comp;
829
830        _LIBCPP_INLINE_VISIBILITY value_compare(key_compare c) : comp(c) {}
831    public:
832        _LIBCPP_INLINE_VISIBILITY
833        bool operator()(const value_type& __x, const value_type& __y) const
834            {return comp(__x.first, __y.first);}
835    };
836
837private:
838
839    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
840    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
841    typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>,
842                                                 __value_type>::type __allocator_type;
843    typedef __tree<__value_type, __vc, __allocator_type>   __base;
844    typedef typename __base::__node_traits                 __node_traits;
845    typedef allocator_traits<allocator_type>               __alloc_traits;
846
847    __base __tree_;
848
849public:
850    typedef typename __alloc_traits::pointer               pointer;
851    typedef typename __alloc_traits::const_pointer         const_pointer;
852    typedef typename __alloc_traits::size_type             size_type;
853    typedef typename __alloc_traits::difference_type       difference_type;
854    typedef __map_iterator<typename __base::iterator>             iterator;
855    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
856    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
857    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
858
859    _LIBCPP_INLINE_VISIBILITY
860    map()
861        _NOEXCEPT_(
862            is_nothrow_default_constructible<allocator_type>::value &&
863            is_nothrow_default_constructible<key_compare>::value &&
864            is_nothrow_copy_constructible<key_compare>::value)
865        : __tree_(__vc(key_compare())) {}
866
867    _LIBCPP_INLINE_VISIBILITY
868    explicit map(const key_compare& __comp)
869        _NOEXCEPT_(
870            is_nothrow_default_constructible<allocator_type>::value &&
871            is_nothrow_copy_constructible<key_compare>::value)
872        : __tree_(__vc(__comp)) {}
873
874    _LIBCPP_INLINE_VISIBILITY
875    explicit map(const key_compare& __comp, const allocator_type& __a)
876        : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {}
877
878    template <class _InputIterator>
879    _LIBCPP_INLINE_VISIBILITY
880        map(_InputIterator __f, _InputIterator __l,
881            const key_compare& __comp = key_compare())
882        : __tree_(__vc(__comp))
883        {
884            insert(__f, __l);
885        }
886
887    template <class _InputIterator>
888    _LIBCPP_INLINE_VISIBILITY
889        map(_InputIterator __f, _InputIterator __l,
890            const key_compare& __comp, const allocator_type& __a)
891        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
892        {
893            insert(__f, __l);
894        }
895
896#if _LIBCPP_STD_VER > 11
897    template <class _InputIterator>
898    _LIBCPP_INLINE_VISIBILITY
899    map(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
900        : map(__f, __l, key_compare(), __a) {}
901#endif
902
903    _LIBCPP_INLINE_VISIBILITY
904    map(const map& __m)
905        : __tree_(__m.__tree_)
906        {
907            insert(__m.begin(), __m.end());
908        }
909
910    _LIBCPP_INLINE_VISIBILITY
911    map& operator=(const map& __m)
912        {
913#ifndef _LIBCPP_CXX03_LANG
914            __tree_ = __m.__tree_;
915#else
916            if (this != &__m) {
917                __tree_.clear();
918                __tree_.value_comp() = __m.__tree_.value_comp();
919                __tree_.__copy_assign_alloc(__m.__tree_);
920                insert(__m.begin(), __m.end());
921            }
922#endif
923            return *this;
924        }
925
926#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
927
928    _LIBCPP_INLINE_VISIBILITY
929    map(map&& __m)
930        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
931        : __tree_(_VSTD::move(__m.__tree_))
932        {
933        }
934
935    map(map&& __m, const allocator_type& __a);
936
937    _LIBCPP_INLINE_VISIBILITY
938    map& operator=(map&& __m)
939        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
940        {
941            __tree_ = _VSTD::move(__m.__tree_);
942            return *this;
943        }
944
945#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
946
947#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
948
949    _LIBCPP_INLINE_VISIBILITY
950    map(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
951        : __tree_(__vc(__comp))
952        {
953            insert(__il.begin(), __il.end());
954        }
955
956    _LIBCPP_INLINE_VISIBILITY
957    map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
958        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
959        {
960            insert(__il.begin(), __il.end());
961        }
962
963#if _LIBCPP_STD_VER > 11
964    _LIBCPP_INLINE_VISIBILITY
965    map(initializer_list<value_type> __il, const allocator_type& __a)
966        : map(__il, key_compare(), __a) {}
967#endif
968
969    _LIBCPP_INLINE_VISIBILITY
970    map& operator=(initializer_list<value_type> __il)
971        {
972            __tree_.__assign_unique(__il.begin(), __il.end());
973            return *this;
974        }
975
976#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
977
978    _LIBCPP_INLINE_VISIBILITY
979    explicit map(const allocator_type& __a)
980        : __tree_(typename __base::allocator_type(__a))
981        {
982        }
983
984    _LIBCPP_INLINE_VISIBILITY
985    map(const map& __m, const allocator_type& __a)
986        : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a))
987        {
988            insert(__m.begin(), __m.end());
989        }
990
991    _LIBCPP_INLINE_VISIBILITY
992          iterator begin() _NOEXCEPT {return __tree_.begin();}
993    _LIBCPP_INLINE_VISIBILITY
994    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
995    _LIBCPP_INLINE_VISIBILITY
996          iterator end() _NOEXCEPT {return __tree_.end();}
997    _LIBCPP_INLINE_VISIBILITY
998    const_iterator end() const _NOEXCEPT {return __tree_.end();}
999
1000    _LIBCPP_INLINE_VISIBILITY
1001          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1002    _LIBCPP_INLINE_VISIBILITY
1003    const_reverse_iterator rbegin() const _NOEXCEPT
1004        {return const_reverse_iterator(end());}
1005    _LIBCPP_INLINE_VISIBILITY
1006          reverse_iterator rend() _NOEXCEPT
1007            {return       reverse_iterator(begin());}
1008    _LIBCPP_INLINE_VISIBILITY
1009    const_reverse_iterator rend() const _NOEXCEPT
1010        {return const_reverse_iterator(begin());}
1011
1012    _LIBCPP_INLINE_VISIBILITY
1013    const_iterator cbegin() const _NOEXCEPT {return begin();}
1014    _LIBCPP_INLINE_VISIBILITY
1015    const_iterator cend() const _NOEXCEPT {return end();}
1016    _LIBCPP_INLINE_VISIBILITY
1017    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1018    _LIBCPP_INLINE_VISIBILITY
1019    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1020
1021    _LIBCPP_INLINE_VISIBILITY
1022    bool      empty() const _NOEXCEPT {return __tree_.size() == 0;}
1023    _LIBCPP_INLINE_VISIBILITY
1024    size_type size() const _NOEXCEPT {return __tree_.size();}
1025    _LIBCPP_INLINE_VISIBILITY
1026    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1027
1028    mapped_type& operator[](const key_type& __k);
1029#ifndef _LIBCPP_CXX03_LANG
1030    mapped_type& operator[](key_type&& __k);
1031#endif
1032
1033          mapped_type& at(const key_type& __k);
1034    const mapped_type& at(const key_type& __k) const;
1035
1036    _LIBCPP_INLINE_VISIBILITY
1037    allocator_type get_allocator() const _NOEXCEPT {return allocator_type(__tree_.__alloc());}
1038    _LIBCPP_INLINE_VISIBILITY
1039    key_compare    key_comp()      const {return __tree_.value_comp().key_comp();}
1040    _LIBCPP_INLINE_VISIBILITY
1041    value_compare  value_comp()    const {return value_compare(__tree_.value_comp().key_comp());}
1042
1043#ifndef _LIBCPP_CXX03_LANG
1044    template <class ..._Args>
1045    _LIBCPP_INLINE_VISIBILITY
1046    pair<iterator, bool> emplace(_Args&& ...__args) {
1047        return __tree_.__emplace_unique(_VSTD::forward<_Args>(__args)...);
1048    }
1049
1050    template <class ..._Args>
1051    _LIBCPP_INLINE_VISIBILITY
1052    iterator emplace_hint(const_iterator __p, _Args&& ...__args) {
1053        return __tree_.__emplace_hint_unique(__p.__i_, _VSTD::forward<_Args>(__args)...);
1054    }
1055
1056    template <class _Pp,
1057              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1058        _LIBCPP_INLINE_VISIBILITY
1059        pair<iterator, bool> insert(_Pp&& __p)
1060            {return __tree_.__insert_unique(_VSTD::forward<_Pp>(__p));}
1061
1062    template <class _Pp,
1063              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1064        _LIBCPP_INLINE_VISIBILITY
1065        iterator insert(const_iterator __pos, _Pp&& __p)
1066            {return __tree_.__insert_unique(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1067
1068#endif  // _LIBCPP_CXX03_LANG
1069
1070    _LIBCPP_INLINE_VISIBILITY
1071    pair<iterator, bool>
1072        insert(const value_type& __v) {return __tree_.__insert_unique(__v);}
1073
1074    _LIBCPP_INLINE_VISIBILITY
1075    iterator
1076        insert(const_iterator __p, const value_type& __v)
1077            {return __tree_.__insert_unique(__p.__i_, __v);}
1078
1079#ifndef _LIBCPP_CXX03_LANG
1080    _LIBCPP_INLINE_VISIBILITY
1081    pair<iterator, bool>
1082    insert(value_type&& __v) {return __tree_.__insert_unique(_VSTD::move(__v));}
1083
1084    _LIBCPP_INLINE_VISIBILITY
1085    iterator insert(const_iterator __p,  value_type&& __v)
1086    {return __tree_.__insert_unique(__p.__i_, _VSTD::move(__v));}
1087#endif
1088
1089    template <class _InputIterator>
1090        _LIBCPP_INLINE_VISIBILITY
1091        void insert(_InputIterator __f, _InputIterator __l)
1092        {
1093            for (const_iterator __e = cend(); __f != __l; ++__f)
1094                insert(__e.__i_, *__f);
1095        }
1096
1097#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1098
1099    _LIBCPP_INLINE_VISIBILITY
1100    void insert(initializer_list<value_type> __il)
1101        {insert(__il.begin(), __il.end());}
1102
1103#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1104
1105#if _LIBCPP_STD_VER > 14
1106
1107    template <class... _Args>
1108        _LIBCPP_INLINE_VISIBILITY
1109        pair<iterator, bool> try_emplace(const key_type& __k, _Args&&... __args)
1110    {
1111        return __tree_.__emplace_unique_key_args(__k,
1112            _VSTD::piecewise_construct,
1113            _VSTD::forward_as_tuple(__k),
1114            _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1115    }
1116
1117    template <class... _Args>
1118        _LIBCPP_INLINE_VISIBILITY
1119        pair<iterator, bool> try_emplace(key_type&& __k, _Args&&... __args)
1120    {
1121        return __tree_.__emplace_unique_key_args(__k,
1122            _VSTD::piecewise_construct,
1123            _VSTD::forward_as_tuple(_VSTD::move(__k)),
1124            _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1125    }
1126
1127    template <class... _Args>
1128        _LIBCPP_INLINE_VISIBILITY
1129        iterator try_emplace(const_iterator __h, const key_type& __k, _Args&&... __args)
1130    {
1131        return __tree_.__emplace_hint_unique_key_args(__h.__i_, __k,
1132            _VSTD::piecewise_construct,
1133            _VSTD::forward_as_tuple(__k),
1134            _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1135    }
1136
1137    template <class... _Args>
1138        _LIBCPP_INLINE_VISIBILITY
1139        iterator try_emplace(const_iterator __h, key_type&& __k, _Args&&... __args)
1140    {
1141        return __tree_.__emplace_hint_unique_key_args(__h.__i_, __k,
1142            _VSTD::piecewise_construct,
1143            _VSTD::forward_as_tuple(_VSTD::move(__k)),
1144            _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...));
1145    }
1146
1147    template <class _Vp>
1148        _LIBCPP_INLINE_VISIBILITY
1149        pair<iterator, bool> insert_or_assign(const key_type& __k, _Vp&& __v)
1150    {
1151        iterator __p = lower_bound(__k);
1152        if ( __p != end() && !key_comp()(__k, __p->first))
1153        {
1154            __p->second = _VSTD::forward<_Vp>(__v);
1155            return _VSTD::make_pair(__p, false);
1156        }
1157        return _VSTD::make_pair(emplace_hint(__p, __k, _VSTD::forward<_Vp>(__v)), true);
1158    }
1159
1160    template <class _Vp>
1161        _LIBCPP_INLINE_VISIBILITY
1162        pair<iterator, bool> insert_or_assign(key_type&& __k, _Vp&& __v)
1163    {
1164        iterator __p = lower_bound(__k);
1165        if ( __p != end() && !key_comp()(__k, __p->first))
1166        {
1167            __p->second = _VSTD::forward<_Vp>(__v);
1168            return _VSTD::make_pair(__p, false);
1169        }
1170        return _VSTD::make_pair(emplace_hint(__p, _VSTD::move(__k), _VSTD::forward<_Vp>(__v)), true);
1171    }
1172
1173    template <class _Vp>
1174        _LIBCPP_INLINE_VISIBILITY
1175        iterator insert_or_assign(const_iterator __h, const key_type& __k, _Vp&& __v)
1176     {
1177        iterator __p = lower_bound(__k);
1178        if ( __p != end() && !key_comp()(__k, __p->first))
1179        {
1180            __p->second = _VSTD::forward<_Vp>(__v);
1181            return __p;
1182        }
1183        return emplace_hint(__h, __k, _VSTD::forward<_Vp>(__v));
1184     }
1185
1186    template <class _Vp>
1187        _LIBCPP_INLINE_VISIBILITY
1188        iterator insert_or_assign(const_iterator __h, key_type&& __k, _Vp&& __v)
1189     {
1190        iterator __p = lower_bound(__k);
1191        if ( __p != end() && !key_comp()(__k, __p->first))
1192        {
1193            __p->second = _VSTD::forward<_Vp>(__v);
1194            return __p;
1195        }
1196        return emplace_hint(__h, _VSTD::move(__k), _VSTD::forward<_Vp>(__v));
1197     }
1198
1199#endif
1200
1201    _LIBCPP_INLINE_VISIBILITY
1202    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1203    _LIBCPP_INLINE_VISIBILITY
1204    iterator erase(iterator __p)       {return __tree_.erase(__p.__i_);}
1205    _LIBCPP_INLINE_VISIBILITY
1206    size_type erase(const key_type& __k)
1207        {return __tree_.__erase_unique(__k);}
1208    _LIBCPP_INLINE_VISIBILITY
1209    iterator  erase(const_iterator __f, const_iterator __l)
1210        {return __tree_.erase(__f.__i_, __l.__i_);}
1211    _LIBCPP_INLINE_VISIBILITY
1212    void clear() _NOEXCEPT {__tree_.clear();}
1213
1214    _LIBCPP_INLINE_VISIBILITY
1215    void swap(map& __m)
1216        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1217        {__tree_.swap(__m.__tree_);}
1218
1219    _LIBCPP_INLINE_VISIBILITY
1220    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1221    _LIBCPP_INLINE_VISIBILITY
1222    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1223#if _LIBCPP_STD_VER > 11
1224    template <typename _K2>
1225    _LIBCPP_INLINE_VISIBILITY
1226    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1227    find(const _K2& __k)                           {return __tree_.find(__k);}
1228    template <typename _K2>
1229    _LIBCPP_INLINE_VISIBILITY
1230    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1231    find(const _K2& __k) const                     {return __tree_.find(__k);}
1232#endif
1233
1234    _LIBCPP_INLINE_VISIBILITY
1235    size_type      count(const key_type& __k) const
1236        {return __tree_.__count_unique(__k);}
1237#if _LIBCPP_STD_VER > 11
1238    template <typename _K2>
1239    _LIBCPP_INLINE_VISIBILITY
1240    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1241    count(const _K2& __k) const {return __tree_.__count_unique(__k);}
1242#endif
1243    _LIBCPP_INLINE_VISIBILITY
1244    iterator lower_bound(const key_type& __k)
1245        {return __tree_.lower_bound(__k);}
1246    _LIBCPP_INLINE_VISIBILITY
1247    const_iterator lower_bound(const key_type& __k) const
1248        {return __tree_.lower_bound(__k);}
1249#if _LIBCPP_STD_VER > 11
1250    template <typename _K2>
1251    _LIBCPP_INLINE_VISIBILITY
1252    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1253    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1254
1255    template <typename _K2>
1256    _LIBCPP_INLINE_VISIBILITY
1257    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1258    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1259#endif
1260
1261    _LIBCPP_INLINE_VISIBILITY
1262    iterator upper_bound(const key_type& __k)
1263        {return __tree_.upper_bound(__k);}
1264    _LIBCPP_INLINE_VISIBILITY
1265    const_iterator upper_bound(const key_type& __k) const
1266        {return __tree_.upper_bound(__k);}
1267#if _LIBCPP_STD_VER > 11
1268    template <typename _K2>
1269    _LIBCPP_INLINE_VISIBILITY
1270    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1271    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1272    template <typename _K2>
1273    _LIBCPP_INLINE_VISIBILITY
1274    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1275    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1276#endif
1277
1278    _LIBCPP_INLINE_VISIBILITY
1279    pair<iterator,iterator> equal_range(const key_type& __k)
1280        {return __tree_.__equal_range_unique(__k);}
1281    _LIBCPP_INLINE_VISIBILITY
1282    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1283        {return __tree_.__equal_range_unique(__k);}
1284#if _LIBCPP_STD_VER > 11
1285    template <typename _K2>
1286    _LIBCPP_INLINE_VISIBILITY
1287    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1288    equal_range(const _K2& __k)       {return __tree_.__equal_range_unique(__k);}
1289    template <typename _K2>
1290    _LIBCPP_INLINE_VISIBILITY
1291    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1292    equal_range(const _K2& __k) const {return __tree_.__equal_range_unique(__k);}
1293#endif
1294
1295private:
1296    typedef typename __base::__node                    __node;
1297    typedef typename __base::__node_allocator          __node_allocator;
1298    typedef typename __base::__node_pointer            __node_pointer;
1299    typedef typename __base::__node_base_pointer       __node_base_pointer;
1300    typedef typename __base::__parent_pointer          __parent_pointer;
1301
1302    typedef __map_node_destructor<__node_allocator> _Dp;
1303    typedef unique_ptr<__node, _Dp> __node_holder;
1304
1305#ifdef _LIBCPP_CXX03_LANG
1306    __node_holder __construct_node_with_key(const key_type& __k);
1307#endif
1308};
1309
1310
1311#ifndef _LIBCPP_CXX03_LANG
1312
1313template <class _Key, class _Tp, class _Compare, class _Allocator>
1314map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a)
1315    : __tree_(_VSTD::move(__m.__tree_), typename __base::allocator_type(__a))
1316{
1317    if (__a != __m.get_allocator())
1318    {
1319        const_iterator __e = cend();
1320        while (!__m.empty())
1321            __tree_.__insert_unique(__e.__i_,
1322                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__nc));
1323    }
1324}
1325
1326#endif  // !_LIBCPP_CXX03_LANG
1327
1328
1329#ifdef _LIBCPP_CXX03_LANG
1330
1331template <class _Key, class _Tp, class _Compare, class _Allocator>
1332typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder
1333map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type& __k)
1334{
1335    __node_allocator& __na = __tree_.__node_alloc();
1336    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
1337    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first), __k);
1338    __h.get_deleter().__first_constructed = true;
1339    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.second));
1340    __h.get_deleter().__second_constructed = true;
1341    return _LIBCPP_EXPLICIT_MOVE(__h);  // explicitly moved for C++03
1342}
1343
1344template <class _Key, class _Tp, class _Compare, class _Allocator>
1345_Tp&
1346map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
1347{
1348    __parent_pointer __parent;
1349    __node_base_pointer& __child = __tree_.__find_equal(__parent, __k);
1350    __node_pointer __r = static_cast<__node_pointer>(__child);
1351    if (__child == nullptr)
1352    {
1353        __node_holder __h = __construct_node_with_key(__k);
1354        __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
1355        __r = __h.release();
1356    }
1357    return __r->__value_.__cc.second;
1358}
1359
1360#else
1361
1362template <class _Key, class _Tp, class _Compare, class _Allocator>
1363_Tp&
1364map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k)
1365{
1366    return __tree_.__emplace_unique_key_args(__k,
1367        _VSTD::piecewise_construct,
1368        _VSTD::forward_as_tuple(__k),
1369        _VSTD::forward_as_tuple()).first->__cc.second;
1370}
1371
1372template <class _Key, class _Tp, class _Compare, class _Allocator>
1373_Tp&
1374map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k)
1375{
1376    return __tree_.__emplace_unique_key_args(__k,
1377        _VSTD::piecewise_construct,
1378        _VSTD::forward_as_tuple(_VSTD::move(__k)),
1379        _VSTD::forward_as_tuple()).first->__cc.second;
1380}
1381
1382#endif  // !_LIBCPP_CXX03_LANG
1383
1384template <class _Key, class _Tp, class _Compare, class _Allocator>
1385_Tp&
1386map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k)
1387{
1388    __parent_pointer __parent;
1389    __node_base_pointer& __child = __tree_.__find_equal(__parent, __k);
1390#ifndef _LIBCPP_NO_EXCEPTIONS
1391    if (__child == nullptr)
1392        throw out_of_range("map::at:  key not found");
1393#endif  // _LIBCPP_NO_EXCEPTIONS
1394    return static_cast<__node_pointer>(__child)->__value_.__cc.second;
1395}
1396
1397template <class _Key, class _Tp, class _Compare, class _Allocator>
1398const _Tp&
1399map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const
1400{
1401    __parent_pointer __parent;
1402    __node_base_pointer __child = __tree_.__find_equal(__parent, __k);
1403#ifndef _LIBCPP_NO_EXCEPTIONS
1404    if (__child == nullptr)
1405        throw out_of_range("map::at:  key not found");
1406#endif  // _LIBCPP_NO_EXCEPTIONS
1407    return static_cast<__node_pointer>(__child)->__value_.__cc.second;
1408}
1409
1410
1411template <class _Key, class _Tp, class _Compare, class _Allocator>
1412inline _LIBCPP_INLINE_VISIBILITY
1413bool
1414operator==(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1415           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1416{
1417    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1418}
1419
1420template <class _Key, class _Tp, class _Compare, class _Allocator>
1421inline _LIBCPP_INLINE_VISIBILITY
1422bool
1423operator< (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1424           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1425{
1426    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1427}
1428
1429template <class _Key, class _Tp, class _Compare, class _Allocator>
1430inline _LIBCPP_INLINE_VISIBILITY
1431bool
1432operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1433           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1434{
1435    return !(__x == __y);
1436}
1437
1438template <class _Key, class _Tp, class _Compare, class _Allocator>
1439inline _LIBCPP_INLINE_VISIBILITY
1440bool
1441operator> (const map<_Key, _Tp, _Compare, _Allocator>& __x,
1442           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1443{
1444    return __y < __x;
1445}
1446
1447template <class _Key, class _Tp, class _Compare, class _Allocator>
1448inline _LIBCPP_INLINE_VISIBILITY
1449bool
1450operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1451           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1452{
1453    return !(__x < __y);
1454}
1455
1456template <class _Key, class _Tp, class _Compare, class _Allocator>
1457inline _LIBCPP_INLINE_VISIBILITY
1458bool
1459operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __x,
1460           const map<_Key, _Tp, _Compare, _Allocator>& __y)
1461{
1462    return !(__y < __x);
1463}
1464
1465template <class _Key, class _Tp, class _Compare, class _Allocator>
1466inline _LIBCPP_INLINE_VISIBILITY
1467void
1468swap(map<_Key, _Tp, _Compare, _Allocator>& __x,
1469     map<_Key, _Tp, _Compare, _Allocator>& __y)
1470    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
1471{
1472    __x.swap(__y);
1473}
1474
1475template <class _Key, class _Tp, class _Compare = less<_Key>,
1476          class _Allocator = allocator<pair<const _Key, _Tp> > >
1477class _LIBCPP_TEMPLATE_VIS multimap
1478{
1479public:
1480    // types:
1481    typedef _Key                                     key_type;
1482    typedef _Tp                                      mapped_type;
1483    typedef pair<const key_type, mapped_type>        value_type;
1484    typedef pair<key_type, mapped_type>              __nc_value_type;
1485    typedef _Compare                                 key_compare;
1486    typedef _Allocator                               allocator_type;
1487    typedef value_type&                              reference;
1488    typedef const value_type&                        const_reference;
1489
1490    static_assert((is_same<typename allocator_type::value_type, value_type>::value),
1491                  "Allocator::value_type must be same type as value_type");
1492
1493    class _LIBCPP_TEMPLATE_VIS value_compare
1494        : public binary_function<value_type, value_type, bool>
1495    {
1496        friend class multimap;
1497    protected:
1498        key_compare comp;
1499
1500        _LIBCPP_INLINE_VISIBILITY
1501        value_compare(key_compare c) : comp(c) {}
1502    public:
1503        _LIBCPP_INLINE_VISIBILITY
1504        bool operator()(const value_type& __x, const value_type& __y) const
1505            {return comp(__x.first, __y.first);}
1506    };
1507
1508private:
1509
1510    typedef _VSTD::__value_type<key_type, mapped_type>             __value_type;
1511    typedef __map_value_compare<key_type, __value_type, key_compare> __vc;
1512    typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>,
1513                                                 __value_type>::type __allocator_type;
1514    typedef __tree<__value_type, __vc, __allocator_type>            __base;
1515    typedef typename __base::__node_traits                          __node_traits;
1516    typedef allocator_traits<allocator_type>                        __alloc_traits;
1517
1518    __base __tree_;
1519
1520public:
1521    typedef typename __alloc_traits::pointer               pointer;
1522    typedef typename __alloc_traits::const_pointer         const_pointer;
1523    typedef typename __alloc_traits::size_type             size_type;
1524    typedef typename __alloc_traits::difference_type       difference_type;
1525    typedef __map_iterator<typename __base::iterator>      iterator;
1526    typedef __map_const_iterator<typename __base::const_iterator> const_iterator;
1527    typedef _VSTD::reverse_iterator<iterator>               reverse_iterator;
1528    typedef _VSTD::reverse_iterator<const_iterator>         const_reverse_iterator;
1529
1530    _LIBCPP_INLINE_VISIBILITY
1531    multimap()
1532        _NOEXCEPT_(
1533            is_nothrow_default_constructible<allocator_type>::value &&
1534            is_nothrow_default_constructible<key_compare>::value &&
1535            is_nothrow_copy_constructible<key_compare>::value)
1536        : __tree_(__vc(key_compare())) {}
1537
1538    _LIBCPP_INLINE_VISIBILITY
1539    explicit multimap(const key_compare& __comp)
1540        _NOEXCEPT_(
1541            is_nothrow_default_constructible<allocator_type>::value &&
1542            is_nothrow_copy_constructible<key_compare>::value)
1543        : __tree_(__vc(__comp)) {}
1544
1545    _LIBCPP_INLINE_VISIBILITY
1546    explicit multimap(const key_compare& __comp, const allocator_type& __a)
1547        : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {}
1548
1549    template <class _InputIterator>
1550        _LIBCPP_INLINE_VISIBILITY
1551        multimap(_InputIterator __f, _InputIterator __l,
1552            const key_compare& __comp = key_compare())
1553        : __tree_(__vc(__comp))
1554        {
1555            insert(__f, __l);
1556        }
1557
1558    template <class _InputIterator>
1559        _LIBCPP_INLINE_VISIBILITY
1560        multimap(_InputIterator __f, _InputIterator __l,
1561            const key_compare& __comp, const allocator_type& __a)
1562        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
1563        {
1564            insert(__f, __l);
1565        }
1566
1567#if _LIBCPP_STD_VER > 11
1568    template <class _InputIterator>
1569    _LIBCPP_INLINE_VISIBILITY
1570    multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
1571        : multimap(__f, __l, key_compare(), __a) {}
1572#endif
1573
1574    _LIBCPP_INLINE_VISIBILITY
1575    multimap(const multimap& __m)
1576        : __tree_(__m.__tree_.value_comp(),
1577          __alloc_traits::select_on_container_copy_construction(__m.__tree_.__alloc()))
1578        {
1579            insert(__m.begin(), __m.end());
1580        }
1581
1582    _LIBCPP_INLINE_VISIBILITY
1583    multimap& operator=(const multimap& __m)
1584        {
1585#ifndef _LIBCPP_CXX03_LANG
1586            __tree_ = __m.__tree_;
1587#else
1588            if (this != &__m) {
1589                __tree_.clear();
1590                __tree_.value_comp() = __m.__tree_.value_comp();
1591                __tree_.__copy_assign_alloc(__m.__tree_);
1592                insert(__m.begin(), __m.end());
1593            }
1594#endif
1595            return *this;
1596        }
1597
1598#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1599
1600    _LIBCPP_INLINE_VISIBILITY
1601    multimap(multimap&& __m)
1602        _NOEXCEPT_(is_nothrow_move_constructible<__base>::value)
1603        : __tree_(_VSTD::move(__m.__tree_))
1604        {
1605        }
1606
1607    multimap(multimap&& __m, const allocator_type& __a);
1608
1609    _LIBCPP_INLINE_VISIBILITY
1610    multimap& operator=(multimap&& __m)
1611        _NOEXCEPT_(is_nothrow_move_assignable<__base>::value)
1612        {
1613            __tree_ = _VSTD::move(__m.__tree_);
1614            return *this;
1615        }
1616
1617#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1618
1619#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1620
1621    _LIBCPP_INLINE_VISIBILITY
1622    multimap(initializer_list<value_type> __il, const key_compare& __comp = key_compare())
1623        : __tree_(__vc(__comp))
1624        {
1625            insert(__il.begin(), __il.end());
1626        }
1627
1628    _LIBCPP_INLINE_VISIBILITY
1629    multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a)
1630        : __tree_(__vc(__comp), typename __base::allocator_type(__a))
1631        {
1632            insert(__il.begin(), __il.end());
1633        }
1634
1635#if _LIBCPP_STD_VER > 11
1636    _LIBCPP_INLINE_VISIBILITY
1637    multimap(initializer_list<value_type> __il, const allocator_type& __a)
1638        : multimap(__il, key_compare(), __a) {}
1639#endif
1640
1641    _LIBCPP_INLINE_VISIBILITY
1642    multimap& operator=(initializer_list<value_type> __il)
1643        {
1644            __tree_.__assign_multi(__il.begin(), __il.end());
1645            return *this;
1646        }
1647
1648#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1649
1650    _LIBCPP_INLINE_VISIBILITY
1651    explicit multimap(const allocator_type& __a)
1652        : __tree_(typename __base::allocator_type(__a))
1653        {
1654        }
1655
1656    _LIBCPP_INLINE_VISIBILITY
1657    multimap(const multimap& __m, const allocator_type& __a)
1658        : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a))
1659        {
1660            insert(__m.begin(), __m.end());
1661        }
1662
1663    _LIBCPP_INLINE_VISIBILITY
1664          iterator begin() _NOEXCEPT {return __tree_.begin();}
1665    _LIBCPP_INLINE_VISIBILITY
1666    const_iterator begin() const _NOEXCEPT {return __tree_.begin();}
1667    _LIBCPP_INLINE_VISIBILITY
1668          iterator end() _NOEXCEPT {return __tree_.end();}
1669    _LIBCPP_INLINE_VISIBILITY
1670    const_iterator end() const _NOEXCEPT {return __tree_.end();}
1671
1672    _LIBCPP_INLINE_VISIBILITY
1673          reverse_iterator rbegin() _NOEXCEPT {return reverse_iterator(end());}
1674    _LIBCPP_INLINE_VISIBILITY
1675    const_reverse_iterator rbegin() const _NOEXCEPT
1676        {return const_reverse_iterator(end());}
1677    _LIBCPP_INLINE_VISIBILITY
1678          reverse_iterator rend() _NOEXCEPT {return reverse_iterator(begin());}
1679    _LIBCPP_INLINE_VISIBILITY
1680    const_reverse_iterator rend() const _NOEXCEPT
1681        {return const_reverse_iterator(begin());}
1682
1683    _LIBCPP_INLINE_VISIBILITY
1684    const_iterator cbegin()  const _NOEXCEPT {return begin();}
1685    _LIBCPP_INLINE_VISIBILITY
1686    const_iterator cend() const _NOEXCEPT {return end();}
1687    _LIBCPP_INLINE_VISIBILITY
1688    const_reverse_iterator crbegin() const _NOEXCEPT {return rbegin();}
1689    _LIBCPP_INLINE_VISIBILITY
1690    const_reverse_iterator crend() const _NOEXCEPT {return rend();}
1691
1692    _LIBCPP_INLINE_VISIBILITY
1693    bool empty() const _NOEXCEPT {return __tree_.size() == 0;}
1694    _LIBCPP_INLINE_VISIBILITY
1695    size_type size() const _NOEXCEPT {return __tree_.size();}
1696    _LIBCPP_INLINE_VISIBILITY
1697    size_type max_size() const _NOEXCEPT {return __tree_.max_size();}
1698
1699    _LIBCPP_INLINE_VISIBILITY
1700    allocator_type get_allocator() const _NOEXCEPT {return allocator_type(__tree_.__alloc());}
1701    _LIBCPP_INLINE_VISIBILITY
1702    key_compare    key_comp() const {return __tree_.value_comp().key_comp();}
1703    _LIBCPP_INLINE_VISIBILITY
1704    value_compare  value_comp() const
1705        {return value_compare(__tree_.value_comp().key_comp());}
1706
1707#ifndef _LIBCPP_CXX03_LANG
1708
1709    template <class ..._Args>
1710    _LIBCPP_INLINE_VISIBILITY
1711    iterator emplace(_Args&& ...__args) {
1712        return __tree_.__emplace_multi(_VSTD::forward<_Args>(__args)...);
1713    }
1714
1715    template <class ..._Args>
1716    _LIBCPP_INLINE_VISIBILITY
1717    iterator emplace_hint(const_iterator __p, _Args&& ...__args) {
1718        return __tree_.__emplace_hint_multi(__p.__i_, _VSTD::forward<_Args>(__args)...);
1719    }
1720
1721    template <class _Pp,
1722              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1723        _LIBCPP_INLINE_VISIBILITY
1724        iterator insert(_Pp&& __p)
1725            {return __tree_.__insert_multi(_VSTD::forward<_Pp>(__p));}
1726
1727    template <class _Pp,
1728              class = typename enable_if<is_constructible<value_type, _Pp>::value>::type>
1729        _LIBCPP_INLINE_VISIBILITY
1730        iterator insert(const_iterator __pos, _Pp&& __p)
1731            {return __tree_.__insert_multi(__pos.__i_, _VSTD::forward<_Pp>(__p));}
1732
1733    _LIBCPP_INLINE_VISIBILITY
1734    iterator insert(value_type&& __v)
1735        {return __tree_.__insert_multi(_VSTD::move(__v));}
1736
1737    _LIBCPP_INLINE_VISIBILITY
1738    iterator insert(const_iterator __p, value_type&& __v)
1739        {return __tree_.__insert_multi(__p.__i_, _VSTD::move(__v));}
1740
1741#endif  // _LIBCPP_CXX03_LANG
1742
1743    _LIBCPP_INLINE_VISIBILITY
1744    iterator insert(const value_type& __v) {return __tree_.__insert_multi(__v);}
1745
1746    _LIBCPP_INLINE_VISIBILITY
1747    iterator insert(const_iterator __p, const value_type& __v)
1748            {return __tree_.__insert_multi(__p.__i_, __v);}
1749
1750    template <class _InputIterator>
1751        _LIBCPP_INLINE_VISIBILITY
1752        void insert(_InputIterator __f, _InputIterator __l)
1753        {
1754            for (const_iterator __e = cend(); __f != __l; ++__f)
1755                __tree_.__insert_multi(__e.__i_, *__f);
1756        }
1757
1758#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1759
1760    _LIBCPP_INLINE_VISIBILITY
1761    void insert(initializer_list<value_type> __il)
1762        {insert(__il.begin(), __il.end());}
1763
1764#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
1765
1766    _LIBCPP_INLINE_VISIBILITY
1767    iterator erase(const_iterator __p) {return __tree_.erase(__p.__i_);}
1768    _LIBCPP_INLINE_VISIBILITY
1769    iterator erase(iterator __p)       {return __tree_.erase(__p.__i_);}
1770    _LIBCPP_INLINE_VISIBILITY
1771    size_type erase(const key_type& __k) {return __tree_.__erase_multi(__k);}
1772    _LIBCPP_INLINE_VISIBILITY
1773    iterator  erase(const_iterator __f, const_iterator __l)
1774        {return __tree_.erase(__f.__i_, __l.__i_);}
1775    _LIBCPP_INLINE_VISIBILITY
1776    void clear() {__tree_.clear();}
1777
1778    _LIBCPP_INLINE_VISIBILITY
1779    void swap(multimap& __m)
1780        _NOEXCEPT_(__is_nothrow_swappable<__base>::value)
1781        {__tree_.swap(__m.__tree_);}
1782
1783    _LIBCPP_INLINE_VISIBILITY
1784    iterator find(const key_type& __k)             {return __tree_.find(__k);}
1785    _LIBCPP_INLINE_VISIBILITY
1786    const_iterator find(const key_type& __k) const {return __tree_.find(__k);}
1787#if _LIBCPP_STD_VER > 11
1788    template <typename _K2>
1789    _LIBCPP_INLINE_VISIBILITY
1790    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1791    find(const _K2& __k)                           {return __tree_.find(__k);}
1792    template <typename _K2>
1793    _LIBCPP_INLINE_VISIBILITY
1794    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1795    find(const _K2& __k) const                     {return __tree_.find(__k);}
1796#endif
1797
1798    _LIBCPP_INLINE_VISIBILITY
1799    size_type      count(const key_type& __k) const
1800        {return __tree_.__count_multi(__k);}
1801#if _LIBCPP_STD_VER > 11
1802    template <typename _K2>
1803    _LIBCPP_INLINE_VISIBILITY
1804    typename enable_if<__is_transparent<_Compare, _K2>::value,size_type>::type
1805    count(const _K2& __k) const {return __tree_.__count_multi(__k);}
1806#endif
1807    _LIBCPP_INLINE_VISIBILITY
1808    iterator lower_bound(const key_type& __k)
1809        {return __tree_.lower_bound(__k);}
1810    _LIBCPP_INLINE_VISIBILITY
1811    const_iterator lower_bound(const key_type& __k) const
1812            {return __tree_.lower_bound(__k);}
1813#if _LIBCPP_STD_VER > 11
1814    template <typename _K2>
1815    _LIBCPP_INLINE_VISIBILITY
1816    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1817    lower_bound(const _K2& __k)       {return __tree_.lower_bound(__k);}
1818
1819    template <typename _K2>
1820    _LIBCPP_INLINE_VISIBILITY
1821    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1822    lower_bound(const _K2& __k) const {return __tree_.lower_bound(__k);}
1823#endif
1824
1825    _LIBCPP_INLINE_VISIBILITY
1826    iterator upper_bound(const key_type& __k)
1827            {return __tree_.upper_bound(__k);}
1828    _LIBCPP_INLINE_VISIBILITY
1829    const_iterator upper_bound(const key_type& __k) const
1830            {return __tree_.upper_bound(__k);}
1831#if _LIBCPP_STD_VER > 11
1832    template <typename _K2>
1833    _LIBCPP_INLINE_VISIBILITY
1834    typename enable_if<__is_transparent<_Compare, _K2>::value,iterator>::type
1835    upper_bound(const _K2& __k)       {return __tree_.upper_bound(__k);}
1836    template <typename _K2>
1837    _LIBCPP_INLINE_VISIBILITY
1838    typename enable_if<__is_transparent<_Compare, _K2>::value,const_iterator>::type
1839    upper_bound(const _K2& __k) const {return __tree_.upper_bound(__k);}
1840#endif
1841
1842    _LIBCPP_INLINE_VISIBILITY
1843    pair<iterator,iterator>             equal_range(const key_type& __k)
1844            {return __tree_.__equal_range_multi(__k);}
1845    _LIBCPP_INLINE_VISIBILITY
1846    pair<const_iterator,const_iterator> equal_range(const key_type& __k) const
1847            {return __tree_.__equal_range_multi(__k);}
1848#if _LIBCPP_STD_VER > 11
1849    template <typename _K2>
1850    _LIBCPP_INLINE_VISIBILITY
1851    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<iterator,iterator>>::type
1852    equal_range(const _K2& __k)       {return __tree_.__equal_range_multi(__k);}
1853    template <typename _K2>
1854    _LIBCPP_INLINE_VISIBILITY
1855    typename enable_if<__is_transparent<_Compare, _K2>::value,pair<const_iterator,const_iterator>>::type
1856    equal_range(const _K2& __k) const {return __tree_.__equal_range_multi(__k);}
1857#endif
1858
1859private:
1860    typedef typename __base::__node                    __node;
1861    typedef typename __base::__node_allocator          __node_allocator;
1862    typedef typename __base::__node_pointer            __node_pointer;
1863
1864    typedef __map_node_destructor<__node_allocator> _Dp;
1865    typedef unique_ptr<__node, _Dp> __node_holder;
1866};
1867
1868#ifndef _LIBCPP_CXX03_LANG
1869template <class _Key, class _Tp, class _Compare, class _Allocator>
1870multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a)
1871    : __tree_(_VSTD::move(__m.__tree_), typename __base::allocator_type(__a))
1872{
1873    if (__a != __m.get_allocator())
1874    {
1875        const_iterator __e = cend();
1876        while (!__m.empty())
1877            __tree_.__insert_multi(__e.__i_,
1878                    _VSTD::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__nc));
1879    }
1880}
1881#endif
1882
1883template <class _Key, class _Tp, class _Compare, class _Allocator>
1884inline _LIBCPP_INLINE_VISIBILITY
1885bool
1886operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1887           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1888{
1889    return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
1890}
1891
1892template <class _Key, class _Tp, class _Compare, class _Allocator>
1893inline _LIBCPP_INLINE_VISIBILITY
1894bool
1895operator< (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1896           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1897{
1898    return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
1899}
1900
1901template <class _Key, class _Tp, class _Compare, class _Allocator>
1902inline _LIBCPP_INLINE_VISIBILITY
1903bool
1904operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1905           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1906{
1907    return !(__x == __y);
1908}
1909
1910template <class _Key, class _Tp, class _Compare, class _Allocator>
1911inline _LIBCPP_INLINE_VISIBILITY
1912bool
1913operator> (const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1914           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1915{
1916    return __y < __x;
1917}
1918
1919template <class _Key, class _Tp, class _Compare, class _Allocator>
1920inline _LIBCPP_INLINE_VISIBILITY
1921bool
1922operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1923           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1924{
1925    return !(__x < __y);
1926}
1927
1928template <class _Key, class _Tp, class _Compare, class _Allocator>
1929inline _LIBCPP_INLINE_VISIBILITY
1930bool
1931operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1932           const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1933{
1934    return !(__y < __x);
1935}
1936
1937template <class _Key, class _Tp, class _Compare, class _Allocator>
1938inline _LIBCPP_INLINE_VISIBILITY
1939void
1940swap(multimap<_Key, _Tp, _Compare, _Allocator>& __x,
1941     multimap<_Key, _Tp, _Compare, _Allocator>& __y)
1942    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
1943{
1944    __x.swap(__y);
1945}
1946
1947_LIBCPP_END_NAMESPACE_STD
1948
1949#endif  // _LIBCPP_MAP
1950