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