aboutsummaryrefslogtreecommitdiff
path: root/system/include/libcxx/ext/hash_map
blob: bebdccb3c41c5293f061748dce51ac9aa19dd56c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
// -*- C++ -*-
//===-------------------------- hash_map ----------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_HASH_MAP
#define _LIBCPP_HASH_MAP

/*

    hash_map synopsis

namespace __gnu_cxx
{

template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
          class Alloc = allocator<pair<const Key, T>>>
class hash_map
{
public:
    // types
    typedef Key                                                        key_type;
    typedef T                                                          mapped_type;
    typedef Hash                                                       hasher;
    typedef Pred                                                       key_equal;
    typedef Alloc                                                      allocator_type;
    typedef pair<const key_type, mapped_type>                          value_type;
    typedef value_type&                                                reference;
    typedef const value_type&                                          const_reference;
    typedef typename allocator_traits<allocator_type>::pointer         pointer;
    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer;
    typedef typename allocator_traits<allocator_type>::size_type       size_type;
    typedef typename allocator_traits<allocator_type>::difference_type difference_type;

    typedef /unspecified/ iterator;
    typedef /unspecified/ const_iterator;

    explicit hash_map(size_type n = 193, const hasher& hf = hasher(),
                           const key_equal& eql = key_equal(),
                           const allocator_type& a = allocator_type());
    template <class InputIterator>
        hash_map(InputIterator f, InputIterator l,
                      size_type n = 193, const hasher& hf = hasher(),
                      const key_equal& eql = key_equal(),
                      const allocator_type& a = allocator_type());
    hash_map(const hash_map&);
    ~hash_map();
    hash_map& operator=(const hash_map&);

    allocator_type get_allocator() const;

    bool      empty() const;
    size_type size() const;
    size_type max_size() const;

    iterator       begin();
    iterator       end();
    const_iterator begin()  const;
    const_iterator end()    const;

    pair<iterator, bool> insert(const value_type& obj);
    template <class InputIterator>
        void insert(InputIterator first, InputIterator last);

    void erase(const_iterator position);
    size_type erase(const key_type& k);
    void erase(const_iterator first, const_iterator last);
    void clear();

    void swap(hash_map&);

    hasher hash_funct() const;
    key_equal key_eq() const;

    iterator       find(const key_type& k);
    const_iterator find(const key_type& k) const;
    size_type count(const key_type& k) const;
    pair<iterator, iterator>             equal_range(const key_type& k);
    pair<const_iterator, const_iterator> equal_range(const key_type& k) const;

    mapped_type& operator[](const key_type& k);

    size_type bucket_count() const;
    size_type max_bucket_count() const;

    size_type elems_in_bucket(size_type n) const;

    void resize(size_type n);
};

template <class Key, class T, class Hash, class Pred, class Alloc>
    void swap(hash_map<Key, T, Hash, Pred, Alloc>& x,
              hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
    bool
    operator==(const hash_map<Key, T, Hash, Pred, Alloc>& x,
               const hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
    bool
    operator!=(const hash_map<Key, T, Hash, Pred, Alloc>& x,
               const hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
          class Alloc = allocator<pair<const Key, T>>>
class hash_multimap
{
public:
    // types
    typedef Key                                                        key_type;
    typedef T                                                          mapped_type;
    typedef Hash                                                       hasher;
    typedef Pred                                                       key_equal;
    typedef Alloc                                                      allocator_type;
    typedef pair<const key_type, mapped_type>                          value_type;
    typedef value_type&                                                reference;
    typedef const value_type&                                          const_reference;
    typedef typename allocator_traits<allocator_type>::pointer         pointer;
    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer;
    typedef typename allocator_traits<allocator_type>::size_type       size_type;
    typedef typename allocator_traits<allocator_type>::difference_type difference_type;

    typedef /unspecified/ iterator;
    typedef /unspecified/ const_iterator;

    explicit hash_multimap(size_type n = 193, const hasher& hf = hasher(),
                           const key_equal& eql = key_equal(),
                           const allocator_type& a = allocator_type());
    template <class InputIterator>
        hash_multimap(InputIterator f, InputIterator l,
                      size_type n = 193, const hasher& hf = hasher(),
                      const key_equal& eql = key_equal(),
                      const allocator_type& a = allocator_type());
    explicit hash_multimap(const allocator_type&);
    hash_multimap(const hash_multimap&);
    ~hash_multimap();
    hash_multimap& operator=(const hash_multimap&);

    allocator_type get_allocator() const;

    bool      empty() const;
    size_type size() const;
    size_type max_size() const;

    iterator       begin();
    iterator       end();
    const_iterator begin()  const;
    const_iterator end()    const;

    iterator insert(const value_type& obj);
    template <class InputIterator>
        void insert(InputIterator first, InputIterator last);

    void erase(const_iterator position);
    size_type erase(const key_type& k);
    void erase(const_iterator first, const_iterator last);
    void clear();

    void swap(hash_multimap&);

    hasher hash_funct() const;
    key_equal key_eq() const;

    iterator       find(const key_type& k);
    const_iterator find(const key_type& k) const;
    size_type count(const key_type& k) const;
    pair<iterator, iterator>             equal_range(const key_type& k);
    pair<const_iterator, const_iterator> equal_range(const key_type& k) const;

    size_type bucket_count() const;
    size_type max_bucket_count() const;

    size_type elems_in_bucket(size_type n) const;

    void resize(size_type n);
};

template <class Key, class T, class Hash, class Pred, class Alloc>
    void swap(hash_multimap<Key, T, Hash, Pred, Alloc>& x,
              hash_multimap<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
    bool
    operator==(const hash_multimap<Key, T, Hash, Pred, Alloc>& x,
               const hash_multimap<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
    bool
    operator!=(const hash_multimap<Key, T, Hash, Pred, Alloc>& x,
               const hash_multimap<Key, T, Hash, Pred, Alloc>& y);

}  // __gnu_cxx

*/

#include <__config>
#include <__hash_table>
#include <functional>
#include <stdexcept>
#include <ext/__hash>

#if __DEPRECATED
#warning Use of the header <ext/hash_map> is deprecated.  Migrate to <unordered_map>
#endif

#pragma GCC system_header

namespace __gnu_cxx {

using namespace std;

template <class _Tp, class _Hash, bool = is_empty<_Hash>::value
#if __has_feature(is_final)
                                         && !__is_final(_Hash)
#endif
        >
class __hash_map_hasher
    : private _Hash
{
public:
    _LIBCPP_INLINE_VISIBILITY __hash_map_hasher() : _Hash() {}
    _LIBCPP_INLINE_VISIBILITY __hash_map_hasher(const _Hash& __h) : _Hash(__h) {}
    _LIBCPP_INLINE_VISIBILITY const _Hash& hash_function() const {return *this;}
    _LIBCPP_INLINE_VISIBILITY
    size_t operator()(const _Tp& __x) const
        {return static_cast<const _Hash&>(*this)(__x.first);}
    _LIBCPP_INLINE_VISIBILITY
    size_t operator()(const typename _Tp::first_type& __x) const
        {return static_cast<const _Hash&>(*this)(__x);}
};

template <class _Tp, class _Hash>
class __hash_map_hasher<_Tp, _Hash, false>
{
    _Hash __hash_;
public:
    _LIBCPP_INLINE_VISIBILITY __hash_map_hasher() : __hash_() {}
    _LIBCPP_INLINE_VISIBILITY __hash_map_hasher(const _Hash& __h) : __hash_(__h) {}
    _LIBCPP_INLINE_VISIBILITY const _Hash& hash_function() const {return __hash_;}
    _LIBCPP_INLINE_VISIBILITY
    size_t operator()(const _Tp& __x) const
        {return __hash_(__x.first);}
    _LIBCPP_INLINE_VISIBILITY
    size_t operator()(const typename _Tp::first_type& __x) const
        {return __hash_(__x);}
};

template <class _Tp, class _Pred, bool = is_empty<_Pred>::value
#if __has_feature(is_final)
                                         && !__is_final(_Pred)
#endif
         >
class __hash_map_equal
    : private _Pred
{
public:
    _LIBCPP_INLINE_VISIBILITY __hash_map_equal() : _Pred() {}
    _LIBCPP_INLINE_VISIBILITY __hash_map_equal(const _Pred& __p) : _Pred(__p) {}
    _LIBCPP_INLINE_VISIBILITY const _Pred& key_eq() const {return *this;}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const _Tp& __x, const _Tp& __y) const
        {return static_cast<const _Pred&>(*this)(__x.first, __y.first);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const typename _Tp::first_type& __x, const _Tp& __y) const
        {return static_cast<const _Pred&>(*this)(__x, __y.first);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const _Tp& __x, const typename _Tp::first_type& __y) const
        {return static_cast<const _Pred&>(*this)(__x.first, __y);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const typename _Tp::first_type& __x,
                    const typename _Tp::first_type& __y) const
        {return static_cast<const _Pred&>(*this)(__x, __y);}
};

template <class _Tp, class _Pred>
class __hash_map_equal<_Tp, _Pred, false>
{
    _Pred __pred_;
public:
    _LIBCPP_INLINE_VISIBILITY __hash_map_equal() : __pred_() {}
    _LIBCPP_INLINE_VISIBILITY __hash_map_equal(const _Pred& __p) : __pred_(__p) {}
    _LIBCPP_INLINE_VISIBILITY const _Pred& key_eq() const {return __pred_;}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const _Tp& __x, const _Tp& __y) const
        {return __pred_(__x.first, __y.first);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const typename _Tp::first_type& __x, const _Tp& __y) const
        {return __pred_(__x, __y.first);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const _Tp& __x, const typename _Tp::first_type& __y) const
        {return __pred_(__x.first, __y);}
    _LIBCPP_INLINE_VISIBILITY
    bool operator()(const typename _Tp::first_type& __x,
                    const typename _Tp::first_type& __y) const
        {return __pred_(__x, __y);}
};

template <class _Alloc>
class __hash_map_node_destructor
{
    typedef _Alloc                              allocator_type;
    typedef allocator_traits<allocator_type>    __alloc_traits;
    typedef typename __alloc_traits::value_type::value_type value_type;
public:
    typedef typename __alloc_traits::pointer    pointer;
private:
    typedef typename value_type::first_type     first_type;
    typedef typename value_type::second_type    second_type;

    allocator_type& __na_;

    __hash_map_node_destructor& operator=(const __hash_map_node_destructor&);

public:
    bool __first_constructed;
    bool __second_constructed;

    _LIBCPP_INLINE_VISIBILITY
    explicit __hash_map_node_destructor(allocator_type& __na)
        : __na_(__na),
          __first_constructed(false),
          __second_constructed(false)
        {}

#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
    _LIBCPP_INLINE_VISIBILITY
    __hash_map_node_destructor(__hash_node_destructor<allocator_type>&& __x)
        : __na_(__x.__na_),
          __first_constructed(__x.__value_constructed),
          __second_constructed(__x.__value_constructed)
        {
            __x.__value_constructed = false;
        }
#else  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
    _LIBCPP_INLINE_VISIBILITY
    __hash_map_node_destructor(const __hash_node_destructor<allocator_type>& __x)
        : __na_(__x.__na_),
          __first_constructed(__x.__value_constructed),
          __second_constructed(__x.__value_constructed)
        {
            const_cast<bool&>(__x.__value_constructed) = false;
        }
#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

    _LIBCPP_INLINE_VISIBILITY
    void operator()(pointer __p)
    {
        if (__second_constructed)
            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.second));
        if (__first_constructed)
            __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.first));
        if (__p)
            __alloc_traits::deallocate(__na_, __p, 1);
    }
};

template <class _HashIterator>
class _LIBCPP_VISIBLE __hash_map_iterator
{
    _HashIterator __i_;

    typedef pointer_traits<typename _HashIterator::pointer>      __pointer_traits;
    typedef const typename _HashIterator::value_type::first_type key_type;
    typedef typename _HashIterator::value_type::second_type      mapped_type;
public:
    typedef forward_iterator_tag                                 iterator_category;
    typedef pair<key_type, mapped_type>                          value_type;
    typedef typename _HashIterator::difference_type              difference_type;
    typedef value_type&                                          reference;
    typedef typename __pointer_traits::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
            rebind<value_type>
#else
            rebind<value_type>::other
#endif
                                                                 pointer;

    _LIBCPP_INLINE_VISIBILITY __hash_map_iterator() {}

    _LIBCPP_INLINE_VISIBILITY __hash_map_iterator(_HashIterator __i) : __i_(__i) {}

    _LIBCPP_INLINE_VISIBILITY reference operator*() const {return *operator->();}
    _LIBCPP_INLINE_VISIBILITY pointer operator->() const {return (pointer)__i_.operator->();}

    _LIBCPP_INLINE_VISIBILITY __hash_map_iterator& operator++() {++__i_; return *this;}
    _LIBCPP_INLINE_VISIBILITY
    __hash_map_iterator operator++(int)
    {
        __hash_map_iterator __t(*this);
        ++(*this);
        return __t;
    }

    friend _LIBCPP_INLINE_VISIBILITY 
    bool operator==(const __hash_map_iterator& __x, const __hash_map_iterator& __y)
        {return __x.__i_ == __y.__i_;}
    friend _LIBCPP_INLINE_VISIBILITY 
    bool operator!=(const __hash_map_iterator& __x, const __hash_map_iterator& __y)
        {return __x.__i_ != __y.__i_;}

    template <class, class, class, class, class> friend class _LIBCPP_VISIBLE hash_map;
    template <class, class, class, class, class> friend class _LIBCPP_VISIBLE hash_multimap;
    template <class> friend class _LIBCPP_VISIBLE __hash_const_iterator;
    template <class> friend class _LIBCPP_VISIBLE __hash_const_local_iterator;
    template <class> friend class _LIBCPP_VISIBLE __hash_map_const_iterator;
};

template <class _HashIterator>
class _LIBCPP_VISIBLE __hash_map_const_iterator
{
    _HashIterator __i_;

    typedef pointer_traits<typename _HashIterator::pointer>      __pointer_traits;
    typedef const typename _HashIterator::value_type::first_type key_type;
    typedef typename _HashIterator::value_type::second_type      mapped_type;
public:
    typedef forward_iterator_tag                                 iterator_category;
    typedef pair<key_type, mapped_type>                          value_type;
    typedef typename _HashIterator::difference_type              difference_type;
    typedef const value_type&                                    reference;
    typedef typename __pointer_traits::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
            rebind<value_type>
#else
            rebind<value_type>::other
#endif
                                                                 pointer;

    _LIBCPP_INLINE_VISIBILITY __hash_map_const_iterator() {}

    _LIBCPP_INLINE_VISIBILITY
    __hash_map_const_iterator(_HashIterator __i) : __i_(__i) {}
    _LIBCPP_INLINE_VISIBILITY
    __hash_map_const_iterator(
            __hash_map_iterator<typename _HashIterator::__non_const_iterator> __i)
                : __i_(__i.__i_) {}

    _LIBCPP_INLINE_VISIBILITY
    reference operator*() const {return *operator->();}
    _LIBCPP_INLINE_VISIBILITY
    pointer operator->() const {return (pointer)__i_.operator->();}

    _LIBCPP_INLINE_VISIBILITY
    __hash_map_const_iterator& operator++() {++__i_; return *this;}
    _LIBCPP_INLINE_VISIBILITY
    __hash_map_const_iterator operator++(int)
    {
        __hash_map_const_iterator __t(*this);
        ++(*this);
        return __t;
    }

    friend _LIBCPP_INLINE_VISIBILITY
    bool operator==(const __hash_map_const_iterator& __x, const __hash_map_const_iterator& __y)
        {return __x.__i_ == __y.__i_;}
    friend _LIBCPP_INLINE_VISIBILITY
    bool operator!=(const __hash_map_const_iterator& __x, const __hash_map_const_iterator& __y)
        {return __x.__i_ != __y.__i_;}

    template <class, class, class, class, class> friend class _LIBCPP_VISIBLE hash_map;
    template <class, class, class, class, class> friend class _LIBCPP_VISIBLE hash_multimap;
    template <class> friend class _LIBCPP_VISIBLE __hash_const_iterator;
    template <class> friend class _LIBCPP_VISIBLE __hash_const_local_iterator;
};

template <class _Key, class _Tp, class _Hash = hash<_Key>, class _Pred = equal_to<_Key>,
          class _Alloc = allocator<pair<const _Key, _Tp> > >
class _LIBCPP_VISIBLE hash_map
{
public:
    // types
    typedef _Key                                           key_type;
    typedef _Tp                                            mapped_type;
    typedef _Tp                                            data_type;
    typedef _Hash                                          hasher;
    typedef _Pred                                          key_equal;
    typedef _Alloc                                         allocator_type;
    typedef pair<const key_type, mapped_type>              value_type;
    typedef value_type&                                    reference;
    typedef const value_type&                              const_reference;

private:
    typedef pair<key_type, mapped_type>                    __value_type;
    typedef __hash_map_hasher<__value_type, hasher>   __hasher;
    typedef __hash_map_equal<__value_type, key_equal> __key_equal;
    typedef typename allocator_traits<allocator_type>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
            rebind_alloc<__value_type>
#else
            rebind_alloc<__value_type>::other
#endif
                                                           __allocator_type;

    typedef __hash_table<__value_type, __hasher,
                         __key_equal,  __allocator_type>   __table;

    __table __table_;

    typedef typename __table::__node_pointer               __node_pointer;
    typedef typename __table::__node_const_pointer         __node_const_pointer;
    typedef typename __table::__node_traits                __node_traits;
    typedef typename __table::__node_allocator             __node_allocator;
    typedef typename __table::__node                       __node;
    typedef __hash_map_node_destructor<__node_allocator>   _Dp;
    typedef unique_ptr<__node, _Dp>                         __node_holder;
    typedef allocator_traits<allocator_type>               __alloc_traits;
public:
    typedef typename __alloc_traits::pointer         pointer;
    typedef typename __alloc_traits::const_pointer   const_pointer;
    typedef typename __alloc_traits::size_type       size_type;
    typedef typename __alloc_traits::difference_type difference_type;

    typedef __hash_map_iterator<typename __table::iterator>       iterator;
    typedef __hash_map_const_iterator<typename __table::const_iterator> const_iterator;

    _LIBCPP_INLINE_VISIBILITY hash_map() {__table_.rehash(193);}
    explicit hash_map(size_type __n, const hasher& __hf = hasher(),
                           const key_equal& __eql = key_equal());
    hash_map(size_type __n, const hasher& __hf,
                  const key_equal& __eql,
                  const allocator_type& __a);
    template <class _InputIterator>
        hash_map(_InputIterator __first, _InputIterator __last);
    template <class _InputIterator>
        hash_map(_InputIterator __first, _InputIterator __last,
                      size_type __n, const hasher& __hf = hasher(),
                      const key_equal& __eql = key_equal());
    template <class _InputIterator>
        hash_map(_InputIterator __first, _InputIterator __last,
                      size_type __n, const hasher& __hf,
                      const key_equal& __eql,
                      const allocator_type& __a);
    hash_map(const hash_map& __u);

    _LIBCPP_INLINE_VISIBILITY
    allocator_type get_allocator() const
        {return allocator_type(__table_.__node_alloc());}

    _LIBCPP_INLINE_VISIBILITY
    bool      empty() const {return __table_.size() == 0;}
    _LIBCPP_INLINE_VISIBILITY
    size_type size() const  {return __table_.size();}
    _LIBCPP_INLINE_VISIBILITY
    size_type max_size() const {return __table_.max_size();}

    _LIBCPP_INLINE_VISIBILITY
    iterator       begin()        {return __table_.begin();}
    _LIBCPP_INLINE_VISIBILITY
    iterator       end()          {return __table_.end();}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator begin()  const {return __table_.begin();}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator end()    const {return __table_.end();}

    _LIBCPP_INLINE_VISIBILITY
    pair<iterator, bool> insert(const value_type& __x)
        {return __table_.__insert_unique(__x);}
    _LIBCPP_INLINE_VISIBILITY
    iterator insert(const_iterator, const value_type& __x) {return insert(__x).first;}
    template <class _InputIterator>
        void insert(_InputIterator __first, _InputIterator __last);

    _LIBCPP_INLINE_VISIBILITY
    void erase(const_iterator __p) {__table_.erase(__p.__i_);}
    _LIBCPP_INLINE_VISIBILITY
    size_type erase(const key_type& __k) {return __table_.__erase_unique(__k);}
    _LIBCPP_INLINE_VISIBILITY
    void erase(const_iterator __first, const_iterator __last)
        {__table_.erase(__first.__i_, __last.__i_);}
    _LIBCPP_INLINE_VISIBILITY
    void clear() {__table_.clear();}

    _LIBCPP_INLINE_VISIBILITY
    void swap(hash_map& __u) {__table_.swap(__u.__table_);}

    _LIBCPP_INLINE_VISIBILITY
    hasher hash_funct() const
        {return __table_.hash_function().hash_function();}
    _LIBCPP_INLINE_VISIBILITY
    key_equal key_eq() const
        {return __table_.key_eq().key_eq();}

    _LIBCPP_INLINE_VISIBILITY
    iterator       find(const key_type& __k)       {return __table_.find(__k);}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator find(const key_type& __k) const {return __table_.find(__k);}
    _LIBCPP_INLINE_VISIBILITY
    size_type count(const key_type& __k) const {return __table_.__count_unique(__k);}
    _LIBCPP_INLINE_VISIBILITY
    pair<iterator, iterator>             equal_range(const key_type& __k)
        {return __table_.__equal_range_unique(__k);}
    _LIBCPP_INLINE_VISIBILITY
    pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
        {return __table_.__equal_range_unique(__k);}

    mapped_type& operator[](const key_type& __k);

    _LIBCPP_INLINE_VISIBILITY
    size_type bucket_count() const {return __table_.bucket_count();}
    _LIBCPP_INLINE_VISIBILITY
    size_type max_bucket_count() const {return __table_.max_bucket_count();}

    _LIBCPP_INLINE_VISIBILITY
    size_type elems_in_bucket(size_type __n) const
        {return __table_.bucket_size(__n);}

    _LIBCPP_INLINE_VISIBILITY
    void resize(size_type __n) {__table_.rehash(__n);}

private:
    __node_holder __construct_node(const key_type& __k);
};

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        size_type __n, const hasher& __hf, const key_equal& __eql)
    : __table_(__hf, __eql)
{
    __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        size_type __n, const hasher& __hf, const key_equal& __eql,
        const allocator_type& __a)
    : __table_(__hf, __eql, __a)
{
    __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        _InputIterator __first, _InputIterator __last)
{
    __table_.rehash(193);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        _InputIterator __first, _InputIterator __last, size_type __n,
        const hasher& __hf, const key_equal& __eql)
    : __table_(__hf, __eql)
{
    __table_.rehash(__n);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        _InputIterator __first, _InputIterator __last, size_type __n,
        const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
    : __table_(__hf, __eql, __a)
{
    __table_.rehash(__n);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
        const hash_map& __u)
    : __table_(__u.__table_)
{
    __table_.rehash(__u.bucket_count());
    insert(__u.begin(), __u.end());
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
typename hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::__node_holder
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::__construct_node(const key_type& __k)
{
    __node_allocator& __na = __table_.__node_alloc();
    __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.first), __k);
    __h.get_deleter().__first_constructed = true;
    __node_traits::construct(__na, _VSTD::addressof(__h->__value_.second));
    __h.get_deleter().__second_constructed = true;
    return _VSTD::move(__h);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
inline _LIBCPP_INLINE_VISIBILITY
void
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
                                                       _InputIterator __last)
{
    for (; __first != __last; ++__first)
        __table_.__insert_unique(*__first);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
_Tp&
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type& __k)
{
    iterator __i = find(__k);
    if (__i != end())
        return __i->second;
    __node_holder __h = __construct_node(__k);
    pair<iterator, bool> __r = __table_.__node_insert_unique(__h.get());
    __h.release();
    return __r.first->second;
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    __x.swap(__y);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
bool
operator==(const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
           const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    if (__x.size() != __y.size())
        return false;
    typedef typename hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::const_iterator
                                                                 const_iterator;
    for (const_iterator __i = __x.begin(), __ex = __x.end(), __ey = __y.end();
            __i != __ex; ++__i)
    {
        const_iterator __j = __y.find(__i->first);
        if (__j == __ey || !(*__i == *__j))
            return false;
    }
    return true;
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
           const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    return !(__x == __y);
}

template <class _Key, class _Tp, class _Hash = hash<_Key>, class _Pred = equal_to<_Key>,
          class _Alloc = allocator<pair<const _Key, _Tp> > >
class _LIBCPP_VISIBLE hash_multimap
{
public:
    // types
    typedef _Key                                           key_type;
    typedef _Tp                                            mapped_type;
    typedef _Tp                                            data_type;
    typedef _Hash                                          hasher;
    typedef _Pred                                          key_equal;
    typedef _Alloc                                         allocator_type;
    typedef pair<const key_type, mapped_type>              value_type;
    typedef value_type&                                    reference;
    typedef const value_type&                              const_reference;

private:
    typedef pair<key_type, mapped_type>                    __value_type;
    typedef __hash_map_hasher<__value_type, hasher>   __hasher;
    typedef __hash_map_equal<__value_type, key_equal> __key_equal;
    typedef typename allocator_traits<allocator_type>::template
#ifndef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
            rebind_alloc<__value_type>
#else
            rebind_alloc<__value_type>::other
#endif
                                                           __allocator_type;

    typedef __hash_table<__value_type, __hasher,
                         __key_equal,  __allocator_type>   __table;

    __table __table_;

    typedef typename __table::__node_traits                __node_traits;
    typedef typename __table::__node_allocator             __node_allocator;
    typedef typename __table::__node                       __node;
    typedef __hash_map_node_destructor<__node_allocator>   _Dp;
    typedef unique_ptr<__node, _Dp>                         __node_holder;
    typedef allocator_traits<allocator_type>               __alloc_traits;
public:
    typedef typename __alloc_traits::pointer         pointer;
    typedef typename __alloc_traits::const_pointer   const_pointer;
    typedef typename __alloc_traits::size_type       size_type;
    typedef typename __alloc_traits::difference_type difference_type;

    typedef __hash_map_iterator<typename __table::iterator>       iterator;
    typedef __hash_map_const_iterator<typename __table::const_iterator> const_iterator;

    _LIBCPP_INLINE_VISIBILITY
    hash_multimap() {__table_.rehash(193);}
    explicit hash_multimap(size_type __n, const hasher& __hf = hasher(),
                                const key_equal& __eql = key_equal());
    hash_multimap(size_type __n, const hasher& __hf,
                                const key_equal& __eql,
                                const allocator_type& __a);
    template <class _InputIterator>
        hash_multimap(_InputIterator __first, _InputIterator __last);
    template <class _InputIterator>
        hash_multimap(_InputIterator __first, _InputIterator __last,
                      size_type __n, const hasher& __hf = hasher(),
                      const key_equal& __eql = key_equal());
    template <class _InputIterator>
        hash_multimap(_InputIterator __first, _InputIterator __last,
                      size_type __n, const hasher& __hf,
                      const key_equal& __eql,
                      const allocator_type& __a);
    hash_multimap(const hash_multimap& __u);

    _LIBCPP_INLINE_VISIBILITY
    allocator_type get_allocator() const
        {return allocator_type(__table_.__node_alloc());}

    _LIBCPP_INLINE_VISIBILITY
    bool      empty() const {return __table_.size() == 0;}
    _LIBCPP_INLINE_VISIBILITY
    size_type size() const  {return __table_.size();}
    _LIBCPP_INLINE_VISIBILITY
    size_type max_size() const {return __table_.max_size();}

    _LIBCPP_INLINE_VISIBILITY
    iterator       begin()        {return __table_.begin();}
    _LIBCPP_INLINE_VISIBILITY
    iterator       end()          {return __table_.end();}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator begin()  const {return __table_.begin();}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator end()    const {return __table_.end();}

    _LIBCPP_INLINE_VISIBILITY
    iterator insert(const value_type& __x) {return __table_.__insert_multi(__x);}
    _LIBCPP_INLINE_VISIBILITY
    iterator insert(const_iterator, const value_type& __x) {return insert(__x);}
    template <class _InputIterator>
        void insert(_InputIterator __first, _InputIterator __last);

    _LIBCPP_INLINE_VISIBILITY
    void erase(const_iterator __p) {__table_.erase(__p.__i_);}
    _LIBCPP_INLINE_VISIBILITY
    size_type erase(const key_type& __k) {return __table_.__erase_multi(__k);}
    _LIBCPP_INLINE_VISIBILITY
    void erase(const_iterator __first, const_iterator __last)
        {__table_.erase(__first.__i_, __last.__i_);}
    _LIBCPP_INLINE_VISIBILITY
    void clear() {__table_.clear();}

    _LIBCPP_INLINE_VISIBILITY
    void swap(hash_multimap& __u) {__table_.swap(__u.__table_);}

    _LIBCPP_INLINE_VISIBILITY
    hasher hash_funct() const
        {return __table_.hash_function().hash_function();}
    _LIBCPP_INLINE_VISIBILITY
    key_equal key_eq() const
        {return __table_.key_eq().key_eq();}

    _LIBCPP_INLINE_VISIBILITY
    iterator       find(const key_type& __k)       {return __table_.find(__k);}
    _LIBCPP_INLINE_VISIBILITY
    const_iterator find(const key_type& __k) const {return __table_.find(__k);}
    _LIBCPP_INLINE_VISIBILITY
    size_type count(const key_type& __k) const {return __table_.__count_multi(__k);}
    _LIBCPP_INLINE_VISIBILITY
    pair<iterator, iterator>             equal_range(const key_type& __k)
        {return __table_.__equal_range_multi(__k);}
    _LIBCPP_INLINE_VISIBILITY
    pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
        {return __table_.__equal_range_multi(__k);}

    _LIBCPP_INLINE_VISIBILITY
    size_type bucket_count() const {return __table_.bucket_count();}
    _LIBCPP_INLINE_VISIBILITY
    size_type max_bucket_count() const {return __table_.max_bucket_count();}

    _LIBCPP_INLINE_VISIBILITY
    size_type elems_in_bucket(size_type __n) const
        {return __table_.bucket_size(__n);}

    _LIBCPP_INLINE_VISIBILITY
    void resize(size_type __n) {__table_.rehash(__n);}
};

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        size_type __n, const hasher& __hf, const key_equal& __eql)
    : __table_(__hf, __eql)
{
    __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        size_type __n, const hasher& __hf, const key_equal& __eql,
        const allocator_type& __a)
    : __table_(__hf, __eql, __a)
{
    __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        _InputIterator __first, _InputIterator __last)
{
    __table_.rehash(193);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        _InputIterator __first, _InputIterator __last, size_type __n,
        const hasher& __hf, const key_equal& __eql)
    : __table_(__hf, __eql)
{
    __table_.rehash(__n);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        _InputIterator __first, _InputIterator __last, size_type __n,
        const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
    : __table_(__hf, __eql, __a)
{
    __table_.rehash(__n);
    insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
        const hash_multimap& __u)
    : __table_(__u.__table_)
{
    __table_.rehash(__u.bucket_count());
    insert(__u.begin(), __u.end());
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
inline _LIBCPP_INLINE_VISIBILITY
void
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
                                                            _InputIterator __last)
{
    for (; __first != __last; ++__first)
        __table_.__insert_multi(*__first);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
     hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    __x.swap(__y);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
bool
operator==(const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
           const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    if (__x.size() != __y.size())
        return false;
    typedef typename hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::const_iterator
                                                                 const_iterator;
    typedef pair<const_iterator, const_iterator> _EqRng;
    for (const_iterator __i = __x.begin(), __ex = __x.end(); __i != __ex;)
    {
        _EqRng __xeq = __x.equal_range(__i->first);
        _EqRng __yeq = __y.equal_range(__i->first);
        if (_VSTD::distance(__xeq.first, __xeq.second) !=
            _VSTD::distance(__yeq.first, __yeq.second) ||
                  !_VSTD::is_permutation(__xeq.first, __xeq.second, __yeq.first))
            return false;
        __i = __xeq.second;
    }
    return true;
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
           const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
    return !(__x == __y);
}

} // __gnu_cxx

#endif  // _LIBCPP_HASH_MAP