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1// Hashing map implementation -*- C++ -*-
2
45f388bb 3// Copyright (C) 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
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4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING. If not, write to the Free
83f51799 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction. Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License. This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
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30/*
31 * Copyright (c) 1996
32 * Silicon Graphics Computer Systems, Inc.
33 *
34 * Permission to use, copy, modify, distribute and sell this software
35 * and its documentation for any purpose is hereby granted without fee,
36 * provided that the above copyright notice appear in all copies and
37 * that both that copyright notice and this permission notice appear
38 * in supporting documentation. Silicon Graphics makes no
39 * representations about the suitability of this software for any
40 * purpose. It is provided "as is" without express or implied warranty.
41 *
42 *
43 * Copyright (c) 1994
44 * Hewlett-Packard Company
45 *
46 * Permission to use, copy, modify, distribute and sell this software
47 * and its documentation for any purpose is hereby granted without fee,
48 * provided that the above copyright notice appear in all copies and
49 * that both that copyright notice and this permission notice appear
50 * in supporting documentation. Hewlett-Packard Company makes no
51 * representations about the suitability of this software for any
52 * purpose. It is provided "as is" without express or implied warranty.
53 *
54 */
55
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56/** @file ext/hash_map
57 * This file is a GNU extension to the Standard C++ Library (possibly
0aa06b18 58 * containing extensions from the HP/SGI STL subset).
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59 */
60
fa30fe72 61#ifndef _HASH_MAP
b2acb86f 62#define _HASH_MAP 1
725dc051 63
45f388bb 64#include <bits/c++config.h>
b2acb86f 65#include <ext/hashtable.h>
30a20a1e 66#include <bits/concept_check.h>
725dc051 67
c2ba9709 68_GLIBCXX_BEGIN_NESTED_NAMESPACE(__gnu_cxx, _GLIBCXX_EXT_D)
3cbc7af0 69
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70 using std::equal_to;
71 using std::allocator;
72 using std::pair;
73 using std::_Select1st;
74
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75 /**
76 * This is an SGI extension.
77 * @ingroup SGIextensions
78 * @doctodo
79 */
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80 template<class _Key, class _Tp, class _HashFn = hash<_Key>,
81 class _EqualKey = equal_to<_Key>, class _Alloc = allocator<_Tp> >
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82 class hash_map
83 {
84 private:
45f388bb 85 typedef hashtable<pair<const _Key, _Tp>,_Key, _HashFn,
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86 _Select1st<pair<const _Key, _Tp> >,
87 _EqualKey, _Alloc> _Ht;
88
89 _Ht _M_ht;
90
91 public:
92 typedef typename _Ht::key_type key_type;
93 typedef _Tp data_type;
94 typedef _Tp mapped_type;
95 typedef typename _Ht::value_type value_type;
96 typedef typename _Ht::hasher hasher;
97 typedef typename _Ht::key_equal key_equal;
98
99 typedef typename _Ht::size_type size_type;
100 typedef typename _Ht::difference_type difference_type;
101 typedef typename _Ht::pointer pointer;
102 typedef typename _Ht::const_pointer const_pointer;
103 typedef typename _Ht::reference reference;
104 typedef typename _Ht::const_reference const_reference;
105
106 typedef typename _Ht::iterator iterator;
107 typedef typename _Ht::const_iterator const_iterator;
108
109 typedef typename _Ht::allocator_type allocator_type;
110
111 hasher
112 hash_funct() const
113 { return _M_ht.hash_funct(); }
114
115 key_equal
116 key_eq() const
117 { return _M_ht.key_eq(); }
118
119 allocator_type
120 get_allocator() const
121 { return _M_ht.get_allocator(); }
122
123 public:
124 hash_map()
125 : _M_ht(100, hasher(), key_equal(), allocator_type()) {}
126
127 explicit
128 hash_map(size_type __n)
129 : _M_ht(__n, hasher(), key_equal(), allocator_type()) {}
130
131 hash_map(size_type __n, const hasher& __hf)
132 : _M_ht(__n, __hf, key_equal(), allocator_type()) {}
133
134 hash_map(size_type __n, const hasher& __hf, const key_equal& __eql,
135 const allocator_type& __a = allocator_type())
136 : _M_ht(__n, __hf, __eql, __a) {}
137
45f388bb 138 template<class _InputIterator>
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139 hash_map(_InputIterator __f, _InputIterator __l)
140 : _M_ht(100, hasher(), key_equal(), allocator_type())
141 { _M_ht.insert_unique(__f, __l); }
142
45f388bb 143 template<class _InputIterator>
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144 hash_map(_InputIterator __f, _InputIterator __l, size_type __n)
145 : _M_ht(__n, hasher(), key_equal(), allocator_type())
146 { _M_ht.insert_unique(__f, __l); }
147
45f388bb 148 template<class _InputIterator>
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149 hash_map(_InputIterator __f, _InputIterator __l, size_type __n,
150 const hasher& __hf)
151 : _M_ht(__n, __hf, key_equal(), allocator_type())
152 { _M_ht.insert_unique(__f, __l); }
153
45f388bb 154 template<class _InputIterator>
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155 hash_map(_InputIterator __f, _InputIterator __l, size_type __n,
156 const hasher& __hf, const key_equal& __eql,
157 const allocator_type& __a = allocator_type())
158 : _M_ht(__n, __hf, __eql, __a)
159 { _M_ht.insert_unique(__f, __l); }
160
161 public:
162 size_type
163 size() const
164 { return _M_ht.size(); }
165
166 size_type
167 max_size() const
168 { return _M_ht.max_size(); }
169
170 bool
171 empty() const
172 { return _M_ht.empty(); }
173
174 void
175 swap(hash_map& __hs)
176 { _M_ht.swap(__hs._M_ht); }
177
45f388bb 178 template<class _K1, class _T1, class _HF, class _EqK, class _Al>
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179 friend bool
180 operator== (const hash_map<_K1, _T1, _HF, _EqK, _Al>&,
181 const hash_map<_K1, _T1, _HF, _EqK, _Al>&);
182
183 iterator
184 begin()
185 { return _M_ht.begin(); }
186
187 iterator
188 end()
189 { return _M_ht.end(); }
190
191 const_iterator
192 begin() const
193 { return _M_ht.begin(); }
194
195 const_iterator
196 end() const
197 { return _M_ht.end(); }
198
199 public:
200 pair<iterator, bool>
201 insert(const value_type& __obj)
202 { return _M_ht.insert_unique(__obj); }
203
45f388bb 204 template<class _InputIterator>
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205 void
206 insert(_InputIterator __f, _InputIterator __l)
207 { _M_ht.insert_unique(__f, __l); }
208
209 pair<iterator, bool>
210 insert_noresize(const value_type& __obj)
211 { return _M_ht.insert_unique_noresize(__obj); }
212
213 iterator
214 find(const key_type& __key)
215 { return _M_ht.find(__key); }
216
217 const_iterator
218 find(const key_type& __key) const
219 { return _M_ht.find(__key); }
220
221 _Tp&
222 operator[](const key_type& __key)
223 { return _M_ht.find_or_insert(value_type(__key, _Tp())).second; }
224
225 size_type
226 count(const key_type& __key) const
227 { return _M_ht.count(__key); }
228
229 pair<iterator, iterator>
230 equal_range(const key_type& __key)
231 { return _M_ht.equal_range(__key); }
232
233 pair<const_iterator, const_iterator>
234 equal_range(const key_type& __key) const
235 { return _M_ht.equal_range(__key); }
236
237 size_type
238 erase(const key_type& __key)
239 {return _M_ht.erase(__key); }
240
241 void
242 erase(iterator __it)
243 { _M_ht.erase(__it); }
244
245 void
246 erase(iterator __f, iterator __l)
247 { _M_ht.erase(__f, __l); }
248
249 void
250 clear()
251 { _M_ht.clear(); }
252
253 void
254 resize(size_type __hint)
255 { _M_ht.resize(__hint); }
256
257 size_type
258 bucket_count() const
259 { return _M_ht.bucket_count(); }
260
261 size_type
262 max_bucket_count() const
263 { return _M_ht.max_bucket_count(); }
264
265 size_type
266 elems_in_bucket(size_type __n) const
267 { return _M_ht.elems_in_bucket(__n); }
268 };
269
45f388bb 270 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc>
d962e073 271 inline bool
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272 operator==(const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1,
273 const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2)
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274 { return __hm1._M_ht == __hm2._M_ht; }
275
45f388bb 276 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc>
d962e073 277 inline bool
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278 operator!=(const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1,
279 const hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2)
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280 { return !(__hm1 == __hm2); }
281
45f388bb 282 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc>
d962e073 283 inline void
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284 swap(hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1,
285 hash_map<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2)
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286 { __hm1.swap(__hm2); }
287
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288
289 /**
290 * This is an SGI extension.
291 * @ingroup SGIextensions
292 * @doctodo
293 */
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294 template<class _Key, class _Tp,
295 class _HashFn = hash<_Key>,
296 class _EqualKey = equal_to<_Key>,
297 class _Alloc = allocator<_Tp> >
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298 class hash_multimap
299 {
300 // concept requirements
301 __glibcxx_class_requires(_Key, _SGIAssignableConcept)
302 __glibcxx_class_requires(_Tp, _SGIAssignableConcept)
45f388bb 303 __glibcxx_class_requires3(_HashFn, size_t, _Key, _UnaryFunctionConcept)
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304 __glibcxx_class_requires3(_EqualKey, _Key, _Key, _BinaryPredicateConcept)
305
306 private:
45f388bb 307 typedef hashtable<pair<const _Key, _Tp>, _Key, _HashFn,
d962e073 308 _Select1st<pair<const _Key, _Tp> >, _EqualKey, _Alloc>
725dc051 309 _Ht;
725dc051 310
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311 _Ht _M_ht;
312
313 public:
314 typedef typename _Ht::key_type key_type;
315 typedef _Tp data_type;
316 typedef _Tp mapped_type;
317 typedef typename _Ht::value_type value_type;
318 typedef typename _Ht::hasher hasher;
319 typedef typename _Ht::key_equal key_equal;
320
321 typedef typename _Ht::size_type size_type;
322 typedef typename _Ht::difference_type difference_type;
323 typedef typename _Ht::pointer pointer;
324 typedef typename _Ht::const_pointer const_pointer;
325 typedef typename _Ht::reference reference;
326 typedef typename _Ht::const_reference const_reference;
327
328 typedef typename _Ht::iterator iterator;
329 typedef typename _Ht::const_iterator const_iterator;
330
331 typedef typename _Ht::allocator_type allocator_type;
332
333 hasher
334 hash_funct() const
335 { return _M_ht.hash_funct(); }
336
337 key_equal
338 key_eq() const
339 { return _M_ht.key_eq(); }
340
341 allocator_type
342 get_allocator() const
343 { return _M_ht.get_allocator(); }
344
345 public:
346 hash_multimap()
347 : _M_ht(100, hasher(), key_equal(), allocator_type()) {}
348
349 explicit
350 hash_multimap(size_type __n)
351 : _M_ht(__n, hasher(), key_equal(), allocator_type()) {}
352
353 hash_multimap(size_type __n, const hasher& __hf)
354 : _M_ht(__n, __hf, key_equal(), allocator_type()) {}
355
356 hash_multimap(size_type __n, const hasher& __hf, const key_equal& __eql,
357 const allocator_type& __a = allocator_type())
358 : _M_ht(__n, __hf, __eql, __a) {}
359
45f388bb 360 template<class _InputIterator>
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361 hash_multimap(_InputIterator __f, _InputIterator __l)
362 : _M_ht(100, hasher(), key_equal(), allocator_type())
363 { _M_ht.insert_equal(__f, __l); }
364
45f388bb 365 template<class _InputIterator>
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366 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n)
367 : _M_ht(__n, hasher(), key_equal(), allocator_type())
368 { _M_ht.insert_equal(__f, __l); }
369
45f388bb 370 template<class _InputIterator>
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371 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n,
372 const hasher& __hf)
373 : _M_ht(__n, __hf, key_equal(), allocator_type())
374 { _M_ht.insert_equal(__f, __l); }
375
45f388bb 376 template<class _InputIterator>
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377 hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n,
378 const hasher& __hf, const key_equal& __eql,
379 const allocator_type& __a = allocator_type())
380 : _M_ht(__n, __hf, __eql, __a)
381 { _M_ht.insert_equal(__f, __l); }
382
383 public:
384 size_type
385 size() const
386 { return _M_ht.size(); }
387
388 size_type
389 max_size() const
390 { return _M_ht.max_size(); }
391
392 bool
393 empty() const
394 { return _M_ht.empty(); }
395
396 void
397 swap(hash_multimap& __hs)
398 { _M_ht.swap(__hs._M_ht); }
399
45f388bb 400 template<class _K1, class _T1, class _HF, class _EqK, class _Al>
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401 friend bool
402 operator==(const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&,
403 const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&);
404
405 iterator
406 begin()
407 { return _M_ht.begin(); }
408
409 iterator
410 end()
411 { return _M_ht.end(); }
412
413 const_iterator
414 begin() const
415 { return _M_ht.begin(); }
416
417 const_iterator
418 end() const
419 { return _M_ht.end(); }
725dc051 420
3cbc7af0 421 public:
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422 iterator
423 insert(const value_type& __obj)
424 { return _M_ht.insert_equal(__obj); }
425
45f388bb 426 template<class _InputIterator>
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427 void
428 insert(_InputIterator __f, _InputIterator __l)
429 { _M_ht.insert_equal(__f,__l); }
430
431 iterator
432 insert_noresize(const value_type& __obj)
433 { return _M_ht.insert_equal_noresize(__obj); }
434
435 iterator
436 find(const key_type& __key)
437 { return _M_ht.find(__key); }
438
439 const_iterator
440 find(const key_type& __key) const
441 { return _M_ht.find(__key); }
442
443 size_type
444 count(const key_type& __key) const
445 { return _M_ht.count(__key); }
446
447 pair<iterator, iterator>
448 equal_range(const key_type& __key)
449 { return _M_ht.equal_range(__key); }
450
451 pair<const_iterator, const_iterator>
452 equal_range(const key_type& __key) const
453 { return _M_ht.equal_range(__key); }
454
455 size_type
456 erase(const key_type& __key)
457 { return _M_ht.erase(__key); }
458
459 void
460 erase(iterator __it)
461 { _M_ht.erase(__it); }
462
463 void
464 erase(iterator __f, iterator __l)
465 { _M_ht.erase(__f, __l); }
466
467 void
468 clear()
469 { _M_ht.clear(); }
470
471 public:
472 void
473 resize(size_type __hint)
474 { _M_ht.resize(__hint); }
475
476 size_type
477 bucket_count() const
478 { return _M_ht.bucket_count(); }
479
480 size_type
481 max_bucket_count() const
482 { return _M_ht.max_bucket_count(); }
483
484 size_type
485 elems_in_bucket(size_type __n) const
486 { return _M_ht.elems_in_bucket(__n); }
3cbc7af0 487 };
725dc051 488
45f388bb 489 template<class _Key, class _Tp, class _HF, class _EqKey, class _Alloc>
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490 inline bool
491 operator==(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1,
492 const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2)
493 { return __hm1._M_ht == __hm2._M_ht; }
725dc051 494
45f388bb 495 template<class _Key, class _Tp, class _HF, class _EqKey, class _Alloc>
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496 inline bool
497 operator!=(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1,
498 const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2)
499 { return !(__hm1 == __hm2); }
725dc051 500
45f388bb 501 template<class _Key, class _Tp, class _HashFn, class _EqlKey, class _Alloc>
d962e073 502 inline void
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503 swap(hash_multimap<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm1,
504 hash_multimap<_Key, _Tp, _HashFn, _EqlKey, _Alloc>& __hm2)
d962e073 505 { __hm1.swap(__hm2); }
725dc051 506
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507_GLIBCXX_END_NESTED_NAMESPACE
508
509#ifdef _GLIBCXX_DEBUG
510# include <debug/hash_map>
511#endif
725dc051 512
3cbc7af0 513_GLIBCXX_BEGIN_NAMESPACE(std)
725dc051 514
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515 // Specialization of insert_iterator so that it will work for hash_map
516 // and hash_multimap.
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517 template<class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc>
518 class insert_iterator<__gnu_cxx::hash_map<_Key, _Tp, _HashFn,
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519 _EqKey, _Alloc> >
520 {
521 protected:
522 typedef __gnu_cxx::hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc>
523 _Container;
524 _Container* container;
525
526 public:
527 typedef _Container container_type;
528 typedef output_iterator_tag iterator_category;
529 typedef void value_type;
530 typedef void difference_type;
531 typedef void pointer;
532 typedef void reference;
533
534 insert_iterator(_Container& __x)
535 : container(&__x) {}
536
537 insert_iterator(_Container& __x, typename _Container::iterator)
538 : container(&__x) {}
539
540 insert_iterator<_Container>&
541 operator=(const typename _Container::value_type& __value)
542 {
543 container->insert(__value);
544 return *this;
545 }
546
547 insert_iterator<_Container>&
548 operator*()
549 { return *this; }
550
551 insert_iterator<_Container>&
552 operator++() { return *this; }
553
554 insert_iterator<_Container>&
555 operator++(int)
556 { return *this; }
557 };
558
45f388bb 559 template<class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc>
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560 class insert_iterator<__gnu_cxx::hash_multimap<_Key, _Tp, _HashFn,
561 _EqKey, _Alloc> >
562 {
563 protected:
564 typedef __gnu_cxx::hash_multimap<_Key, _Tp, _HashFn, _EqKey, _Alloc>
565 _Container;
566 _Container* container;
567 typename _Container::iterator iter;
568
569 public:
570 typedef _Container container_type;
571 typedef output_iterator_tag iterator_category;
572 typedef void value_type;
573 typedef void difference_type;
574 typedef void pointer;
575 typedef void reference;
576
577 insert_iterator(_Container& __x)
578 : container(&__x) {}
579
580 insert_iterator(_Container& __x, typename _Container::iterator)
581 : container(&__x) {}
582
583 insert_iterator<_Container>&
584 operator=(const typename _Container::value_type& __value)
585 {
586 container->insert(__value);
587 return *this;
588 }
589
590 insert_iterator<_Container>&
591 operator*()
592 { return *this; }
593
594 insert_iterator<_Container>&
595 operator++()
596 { return *this; }
597
598 insert_iterator<_Container>&
599 operator++(int)
600 { return *this; }
601 };
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602
603_GLIBCXX_END_NAMESPACE
d2763ab5 604
b2acb86f 605#endif