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1// Singly-linked list implementation -*- C++ -*-
2
3// Copyright (C) 2001-2018 Free Software Foundation, Inc.
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 3, 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// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/*
26 * Copyright (c) 1997
27 * Silicon Graphics Computer Systems, Inc.
28 *
29 * Permission to use, copy, modify, distribute and sell this software
30 * and its documentation for any purpose is hereby granted without fee,
31 * provided that the above copyright notice appear in all copies and
32 * that both that copyright notice and this permission notice appear
33 * in supporting documentation. Silicon Graphics makes no
34 * representations about the suitability of this software for any
35 * purpose. It is provided "as is" without express or implied warranty.
36 *
37 */
38
39/** @file ext/slist
40 * This file is a GNU extension to the Standard C++ Library (possibly
41 * containing extensions from the HP/SGI STL subset).
42 */
43
44#ifndef _SLIST
45#define _SLIST 1
46
47#include <algorithm>
48#include <bits/allocator.h>
49#include <bits/stl_construct.h>
50#include <bits/stl_uninitialized.h>
51#include <bits/concept_check.h>
52
53namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
54{
55_GLIBCXX_BEGIN_NAMESPACE_VERSION
56
57 using std::size_t;
58 using std::ptrdiff_t;
59 using std::_Construct;
60 using std::_Destroy;
61 using std::allocator;
62 using std::__true_type;
63 using std::__false_type;
64
65 struct _Slist_node_base
66 {
67 _Slist_node_base* _M_next;
68 };
69
70 inline _Slist_node_base*
71 __slist_make_link(_Slist_node_base* __prev_node,
72 _Slist_node_base* __new_node)
73 {
74 __new_node->_M_next = __prev_node->_M_next;
75 __prev_node->_M_next = __new_node;
76 return __new_node;
77 }
78
79 inline _Slist_node_base*
80 __slist_previous(_Slist_node_base* __head,
81 const _Slist_node_base* __node)
82 {
83 while (__head && __head->_M_next != __node)
84 __head = __head->_M_next;
85 return __head;
86 }
87
88 inline const _Slist_node_base*
89 __slist_previous(const _Slist_node_base* __head,
90 const _Slist_node_base* __node)
91 {
92 while (__head && __head->_M_next != __node)
93 __head = __head->_M_next;
94 return __head;
95 }
96
97 inline void
98 __slist_splice_after(_Slist_node_base* __pos,
99 _Slist_node_base* __before_first,
100 _Slist_node_base* __before_last)
101 {
102 if (__pos != __before_first && __pos != __before_last)
103 {
104 _Slist_node_base* __first = __before_first->_M_next;
105 _Slist_node_base* __after = __pos->_M_next;
106 __before_first->_M_next = __before_last->_M_next;
107 __pos->_M_next = __first;
108 __before_last->_M_next = __after;
109 }
110 }
111
112 inline void
113 __slist_splice_after(_Slist_node_base* __pos, _Slist_node_base* __head)
114 {
115 _Slist_node_base* __before_last = __slist_previous(__head, 0);
116 if (__before_last != __head)
117 {
118 _Slist_node_base* __after = __pos->_M_next;
119 __pos->_M_next = __head->_M_next;
120 __head->_M_next = 0;
121 __before_last->_M_next = __after;
122 }
123 }
124
125 inline _Slist_node_base*
126 __slist_reverse(_Slist_node_base* __node)
127 {
128 _Slist_node_base* __result = __node;
129 __node = __node->_M_next;
130 __result->_M_next = 0;
131 while(__node)
132 {
133 _Slist_node_base* __next = __node->_M_next;
134 __node->_M_next = __result;
135 __result = __node;
136 __node = __next;
137 }
138 return __result;
139 }
140
141 inline size_t
142 __slist_size(_Slist_node_base* __node)
143 {
144 size_t __result = 0;
145 for (; __node != 0; __node = __node->_M_next)
146 ++__result;
147 return __result;
148 }
149
150 template <class _Tp>
151 struct _Slist_node : public _Slist_node_base
152 {
153 _Tp _M_data;
154 };
155
156 struct _Slist_iterator_base
157 {
158 typedef size_t size_type;
159 typedef ptrdiff_t difference_type;
160 typedef std::forward_iterator_tag iterator_category;
161
162 _Slist_node_base* _M_node;
163
164 _Slist_iterator_base(_Slist_node_base* __x)
165 : _M_node(__x) {}
166
167 void
168 _M_incr()
169 { _M_node = _M_node->_M_next; }
170
171 bool
172 operator==(const _Slist_iterator_base& __x) const
173 { return _M_node == __x._M_node; }
174
175 bool
176 operator!=(const _Slist_iterator_base& __x) const
177 { return _M_node != __x._M_node; }
178 };
179
180 template <class _Tp, class _Ref, class _Ptr>
181 struct _Slist_iterator : public _Slist_iterator_base
182 {
183 typedef _Slist_iterator<_Tp, _Tp&, _Tp*> iterator;
184 typedef _Slist_iterator<_Tp, const _Tp&, const _Tp*> const_iterator;
185 typedef _Slist_iterator<_Tp, _Ref, _Ptr> _Self;
186
187 typedef _Tp value_type;
188 typedef _Ptr pointer;
189 typedef _Ref reference;
190 typedef _Slist_node<_Tp> _Node;
191
192 explicit
193 _Slist_iterator(_Node* __x)
194 : _Slist_iterator_base(__x) {}
195
196 _Slist_iterator()
197 : _Slist_iterator_base(0) {}
198
199 _Slist_iterator(const iterator& __x)
200 : _Slist_iterator_base(__x._M_node) {}
201
202 reference
203 operator*() const
204 { return ((_Node*) _M_node)->_M_data; }
205
206 pointer
207 operator->() const
208 { return &(operator*()); }
209
210 _Self&
211 operator++()
212 {
213 _M_incr();
214 return *this;
215 }
216
217 _Self
218 operator++(int)
219 {
220 _Self __tmp = *this;
221 _M_incr();
222 return __tmp;
223 }
224 };
225
226 template <class _Tp, class _Alloc>
227 struct _Slist_base
228 : public _Alloc::template rebind<_Slist_node<_Tp> >::other
229 {
230 typedef typename _Alloc::template rebind<_Slist_node<_Tp> >::other
231 _Node_alloc;
232 typedef _Alloc allocator_type;
233
234 allocator_type
235 get_allocator() const
236 { return *static_cast<const _Node_alloc*>(this); }
237
238 _Slist_base(const allocator_type& __a)
239 : _Node_alloc(__a)
240 { this->_M_head._M_next = 0; }
241
242 ~_Slist_base()
243 { _M_erase_after(&this->_M_head, 0); }
244
245 protected:
246 _Slist_node_base _M_head;
247
248 _Slist_node<_Tp>*
249 _M_get_node()
250 { return _Node_alloc::allocate(1); }
251
252 void
253 _M_put_node(_Slist_node<_Tp>* __p)
254 { _Node_alloc::deallocate(__p, 1); }
255
256 protected:
257 _Slist_node_base* _M_erase_after(_Slist_node_base* __pos)
258 {
259 _Slist_node<_Tp>* __next = (_Slist_node<_Tp>*) (__pos->_M_next);
260 _Slist_node_base* __next_next = __next->_M_next;
261 __pos->_M_next = __next_next;
262 get_allocator().destroy(&__next->_M_data);
263 _M_put_node(__next);
264 return __next_next;
265 }
266 _Slist_node_base* _M_erase_after(_Slist_node_base*, _Slist_node_base*);
267 };
268
269 template <class _Tp, class _Alloc>
270 _Slist_node_base*
271 _Slist_base<_Tp,_Alloc>::_M_erase_after(_Slist_node_base* __before_first,
272 _Slist_node_base* __last_node)
273 {
274 _Slist_node<_Tp>* __cur = (_Slist_node<_Tp>*) (__before_first->_M_next);
275 while (__cur != __last_node)
276 {
277 _Slist_node<_Tp>* __tmp = __cur;
278 __cur = (_Slist_node<_Tp>*) __cur->_M_next;
279 get_allocator().destroy(&__tmp->_M_data);
280 _M_put_node(__tmp);
281 }
282 __before_first->_M_next = __last_node;
283 return __last_node;
284 }
285
286 /**
287 * This is an SGI extension.
288 * @ingroup SGIextensions
289 * @doctodo
290 */
291 template <class _Tp, class _Alloc = allocator<_Tp> >
292 class slist : private _Slist_base<_Tp,_Alloc>
293 {
294 // concept requirements
295 __glibcxx_class_requires(_Tp, _SGIAssignableConcept)
296
297 private:
298 typedef _Slist_base<_Tp,_Alloc> _Base;
299
300 public:
301 typedef _Tp value_type;
302 typedef value_type* pointer;
303 typedef const value_type* const_pointer;
304 typedef value_type& reference;
305 typedef const value_type& const_reference;
306 typedef size_t size_type;
307 typedef ptrdiff_t difference_type;
308
309 typedef _Slist_iterator<_Tp, _Tp&, _Tp*> iterator;
310 typedef _Slist_iterator<_Tp, const _Tp&, const _Tp*> const_iterator;
311
312 typedef typename _Base::allocator_type allocator_type;
313
314 allocator_type
315 get_allocator() const
316 { return _Base::get_allocator(); }
317
318 private:
319 typedef _Slist_node<_Tp> _Node;
320 typedef _Slist_node_base _Node_base;
321 typedef _Slist_iterator_base _Iterator_base;
322
323 _Node*
324 _M_create_node(const value_type& __x)
325 {
326 _Node* __node = this->_M_get_node();
327 __try
328 {
329 get_allocator().construct(&__node->_M_data, __x);
330 __node->_M_next = 0;
331 }
332 __catch(...)
333 {
334 this->_M_put_node(__node);
335 __throw_exception_again;
336 }
337 return __node;
338 }
339
340 _Node*
341 _M_create_node()
342 {
343 _Node* __node = this->_M_get_node();
344 __try
345 {
346 get_allocator().construct(&__node->_M_data, value_type());
347 __node->_M_next = 0;
348 }
349 __catch(...)
350 {
351 this->_M_put_node(__node);
352 __throw_exception_again;
353 }
354 return __node;
355 }
356
357 public:
358 explicit
359 slist(const allocator_type& __a = allocator_type())
360 : _Base(__a) {}
361
362 slist(size_type __n, const value_type& __x,
363 const allocator_type& __a = allocator_type())
364 : _Base(__a)
365 { _M_insert_after_fill(&this->_M_head, __n, __x); }
366
367 explicit
368 slist(size_type __n)
369 : _Base(allocator_type())
370 { _M_insert_after_fill(&this->_M_head, __n, value_type()); }
371
372 // We don't need any dispatching tricks here, because
373 // _M_insert_after_range already does them.
374 template <class _InputIterator>
375 slist(_InputIterator __first, _InputIterator __last,
376 const allocator_type& __a = allocator_type())
377 : _Base(__a)
378 { _M_insert_after_range(&this->_M_head, __first, __last); }
379
380 slist(const slist& __x)
381 : _Base(__x.get_allocator())
382 { _M_insert_after_range(&this->_M_head, __x.begin(), __x.end()); }
383
384 slist&
385 operator= (const slist& __x);
386
387 ~slist() {}
388
389 public:
390 // assign(), a generalized assignment member function. Two
391 // versions: one that takes a count, and one that takes a range.
392 // The range version is a member template, so we dispatch on whether
393 // or not the type is an integer.
394
395 void
396 assign(size_type __n, const _Tp& __val)
397 { _M_fill_assign(__n, __val); }
398
399 void
400 _M_fill_assign(size_type __n, const _Tp& __val);
401
402 template <class _InputIterator>
403 void
404 assign(_InputIterator __first, _InputIterator __last)
405 {
406 typedef typename std::__is_integer<_InputIterator>::__type _Integral;
407 _M_assign_dispatch(__first, __last, _Integral());
408 }
409
410 template <class _Integer>
411 void
412 _M_assign_dispatch(_Integer __n, _Integer __val, __true_type)
413 { _M_fill_assign((size_type) __n, (_Tp) __val); }
414
415 template <class _InputIterator>
416 void
417 _M_assign_dispatch(_InputIterator __first, _InputIterator __last,
418 __false_type);
419
420 public:
421
422 iterator
423 begin()
424 { return iterator((_Node*)this->_M_head._M_next); }
425
426 const_iterator
427 begin() const
428 { return const_iterator((_Node*)this->_M_head._M_next);}
429
430 iterator
431 end()
432 { return iterator(0); }
433
434 const_iterator
435 end() const
436 { return const_iterator(0); }
437
438 // Experimental new feature: before_begin() returns a
439 // non-dereferenceable iterator that, when incremented, yields
440 // begin(). This iterator may be used as the argument to
441 // insert_after, erase_after, etc. Note that even for an empty
442 // slist, before_begin() is not the same iterator as end(). It
443 // is always necessary to increment before_begin() at least once to
444 // obtain end().
445 iterator
446 before_begin()
447 { return iterator((_Node*) &this->_M_head); }
448
449 const_iterator
450 before_begin() const
451 { return const_iterator((_Node*) &this->_M_head); }
452
453 size_type
454 size() const
455 { return __slist_size(this->_M_head._M_next); }
456
457 size_type
458 max_size() const
459 { return size_type(-1); }
460
461 bool
462 empty() const
463 { return this->_M_head._M_next == 0; }
464
465 void
466 swap(slist& __x)
467 { std::swap(this->_M_head._M_next, __x._M_head._M_next); }
468
469 public:
470
471 reference
472 front()
473 { return ((_Node*) this->_M_head._M_next)->_M_data; }
474
475 const_reference
476 front() const
477 { return ((_Node*) this->_M_head._M_next)->_M_data; }
478
479 void
480 push_front(const value_type& __x)
481 { __slist_make_link(&this->_M_head, _M_create_node(__x)); }
482
483 void
484 push_front()
485 { __slist_make_link(&this->_M_head, _M_create_node()); }
486
487 void
488 pop_front()
489 {
490 _Node* __node = (_Node*) this->_M_head._M_next;
491 this->_M_head._M_next = __node->_M_next;
492 get_allocator().destroy(&__node->_M_data);
493 this->_M_put_node(__node);
494 }
495
496 iterator
497 previous(const_iterator __pos)
498 { return iterator((_Node*) __slist_previous(&this->_M_head,
499 __pos._M_node)); }
500
501 const_iterator
502 previous(const_iterator __pos) const
503 { return const_iterator((_Node*) __slist_previous(&this->_M_head,
504 __pos._M_node)); }
505
506 private:
507 _Node*
508 _M_insert_after(_Node_base* __pos, const value_type& __x)
509 { return (_Node*) (__slist_make_link(__pos, _M_create_node(__x))); }
510
511 _Node*
512 _M_insert_after(_Node_base* __pos)
513 { return (_Node*) (__slist_make_link(__pos, _M_create_node())); }
514
515 void
516 _M_insert_after_fill(_Node_base* __pos,
517 size_type __n, const value_type& __x)
518 {
519 for (size_type __i = 0; __i < __n; ++__i)
520 __pos = __slist_make_link(__pos, _M_create_node(__x));
521 }
522
523 // Check whether it's an integral type. If so, it's not an iterator.
524 template <class _InIterator>
525 void
526 _M_insert_after_range(_Node_base* __pos,
527 _InIterator __first, _InIterator __last)
528 {
529 typedef typename std::__is_integer<_InIterator>::__type _Integral;
530 _M_insert_after_range(__pos, __first, __last, _Integral());
531 }
532
533 template <class _Integer>
534 void
535 _M_insert_after_range(_Node_base* __pos, _Integer __n, _Integer __x,
536 __true_type)
537 { _M_insert_after_fill(__pos, __n, __x); }
538
539 template <class _InIterator>
540 void
541 _M_insert_after_range(_Node_base* __pos,
542 _InIterator __first, _InIterator __last,
543 __false_type)
544 {
545 while (__first != __last)
546 {
547 __pos = __slist_make_link(__pos, _M_create_node(*__first));
548 ++__first;
549 }
550 }
551
552 public:
553 iterator
554 insert_after(iterator __pos, const value_type& __x)
555 { return iterator(_M_insert_after(__pos._M_node, __x)); }
556
557 iterator
558 insert_after(iterator __pos)
559 { return insert_after(__pos, value_type()); }
560
561 void
562 insert_after(iterator __pos, size_type __n, const value_type& __x)
563 { _M_insert_after_fill(__pos._M_node, __n, __x); }
564
565 // We don't need any dispatching tricks here, because
566 // _M_insert_after_range already does them.
567 template <class _InIterator>
568 void
569 insert_after(iterator __pos, _InIterator __first, _InIterator __last)
570 { _M_insert_after_range(__pos._M_node, __first, __last); }
571
572 iterator
573 insert(iterator __pos, const value_type& __x)
574 { return iterator(_M_insert_after(__slist_previous(&this->_M_head,
575 __pos._M_node),
576 __x)); }
577
578 iterator
579 insert(iterator __pos)
580 { return iterator(_M_insert_after(__slist_previous(&this->_M_head,
581 __pos._M_node),
582 value_type())); }
583
584 void
585 insert(iterator __pos, size_type __n, const value_type& __x)
586 { _M_insert_after_fill(__slist_previous(&this->_M_head, __pos._M_node),
587 __n, __x); }
588
589 // We don't need any dispatching tricks here, because
590 // _M_insert_after_range already does them.
591 template <class _InIterator>
592 void
593 insert(iterator __pos, _InIterator __first, _InIterator __last)
594 { _M_insert_after_range(__slist_previous(&this->_M_head, __pos._M_node),
595 __first, __last); }
596
597 public:
598 iterator
599 erase_after(iterator __pos)
600 { return iterator((_Node*) this->_M_erase_after(__pos._M_node)); }
601
602 iterator
603 erase_after(iterator __before_first, iterator __last)
604 {
605 return iterator((_Node*) this->_M_erase_after(__before_first._M_node,
606 __last._M_node));
607 }
608
609 iterator
610 erase(iterator __pos)
611 {
612 return iterator((_Node*) this->_M_erase_after
613 (__slist_previous(&this->_M_head, __pos._M_node)));
614 }
615
616 iterator
617 erase(iterator __first, iterator __last)
618 {
619 return iterator((_Node*) this->_M_erase_after
620 (__slist_previous(&this->_M_head, __first._M_node),
621 __last._M_node));
622 }
623
624 void
625 resize(size_type new_size, const _Tp& __x);
626
627 void
628 resize(size_type new_size)
629 { resize(new_size, _Tp()); }
630
631 void
632 clear()
633 { this->_M_erase_after(&this->_M_head, 0); }
634
635 public:
636 // Moves the range [__before_first + 1, __before_last + 1) to *this,
637 // inserting it immediately after __pos. This is constant time.
638 void
639 splice_after(iterator __pos,
640 iterator __before_first, iterator __before_last)
641 {
642 if (__before_first != __before_last)
643 __slist_splice_after(__pos._M_node, __before_first._M_node,
644 __before_last._M_node);
645 }
646
647 // Moves the element that follows __prev to *this, inserting it
648 // immediately after __pos. This is constant time.
649 void
650 splice_after(iterator __pos, iterator __prev)
651 { __slist_splice_after(__pos._M_node,
652 __prev._M_node, __prev._M_node->_M_next); }
653
654 // Removes all of the elements from the list __x to *this, inserting
655 // them immediately after __pos. __x must not be *this. Complexity:
656 // linear in __x.size().
657 void
658 splice_after(iterator __pos, slist& __x)
659 { __slist_splice_after(__pos._M_node, &__x._M_head); }
660
661 // Linear in distance(begin(), __pos), and linear in __x.size().
662 void
663 splice(iterator __pos, slist& __x)
664 {
665 if (__x._M_head._M_next)
666 __slist_splice_after(__slist_previous(&this->_M_head, __pos._M_node),
667 &__x._M_head,
668 __slist_previous(&__x._M_head, 0)); }
669
670 // Linear in distance(begin(), __pos), and in distance(__x.begin(), __i).
671 void
672 splice(iterator __pos, slist& __x, iterator __i)
673 { __slist_splice_after(__slist_previous(&this->_M_head, __pos._M_node),
674 __slist_previous(&__x._M_head, __i._M_node),
675 __i._M_node); }
676
677 // Linear in distance(begin(), __pos), in distance(__x.begin(), __first),
678 // and in distance(__first, __last).
679 void
680 splice(iterator __pos, slist& __x, iterator __first, iterator __last)
681 {
682 if (__first != __last)
683 __slist_splice_after(__slist_previous(&this->_M_head, __pos._M_node),
684 __slist_previous(&__x._M_head, __first._M_node),
685 __slist_previous(__first._M_node,
686 __last._M_node));
687 }
688
689 public:
690 void
691 reverse()
692 {
693 if (this->_M_head._M_next)
694 this->_M_head._M_next = __slist_reverse(this->_M_head._M_next);
695 }
696
697 void
698 remove(const _Tp& __val);
699
700 void
701 unique();
702
703 void
704 merge(slist& __x);
705
706 void
707 sort();
708
709 template <class _Predicate>
710 void
711 remove_if(_Predicate __pred);
712
713 template <class _BinaryPredicate>
714 void
715 unique(_BinaryPredicate __pred);
716
717 template <class _StrictWeakOrdering>
718 void
719 merge(slist&, _StrictWeakOrdering);
720
721 template <class _StrictWeakOrdering>
722 void
723 sort(_StrictWeakOrdering __comp);
724 };
725
726 template <class _Tp, class _Alloc>
727 slist<_Tp, _Alloc>&
728 slist<_Tp, _Alloc>::operator=(const slist<_Tp, _Alloc>& __x)
729 {
730 if (&__x != this)
731 {
732 _Node_base* __p1 = &this->_M_head;
733 _Node* __n1 = (_Node*) this->_M_head._M_next;
734 const _Node* __n2 = (const _Node*) __x._M_head._M_next;
735 while (__n1 && __n2)
736 {
737 __n1->_M_data = __n2->_M_data;
738 __p1 = __n1;
739 __n1 = (_Node*) __n1->_M_next;
740 __n2 = (const _Node*) __n2->_M_next;
741 }
742 if (__n2 == 0)
743 this->_M_erase_after(__p1, 0);
744 else
745 _M_insert_after_range(__p1, const_iterator((_Node*)__n2),
746 const_iterator(0));
747 }
748 return *this;
749 }
750
751 template <class _Tp, class _Alloc>
752 void
753 slist<_Tp, _Alloc>::_M_fill_assign(size_type __n, const _Tp& __val)
754 {
755 _Node_base* __prev = &this->_M_head;
756 _Node* __node = (_Node*) this->_M_head._M_next;
757 for (; __node != 0 && __n > 0; --__n)
758 {
759 __node->_M_data = __val;
760 __prev = __node;
761 __node = (_Node*) __node->_M_next;
762 }
763 if (__n > 0)
764 _M_insert_after_fill(__prev, __n, __val);
765 else
766 this->_M_erase_after(__prev, 0);
767 }
768
769 template <class _Tp, class _Alloc>
770 template <class _InputIterator>
771 void
772 slist<_Tp, _Alloc>::_M_assign_dispatch(_InputIterator __first,
773 _InputIterator __last,
774 __false_type)
775 {
776 _Node_base* __prev = &this->_M_head;
777 _Node* __node = (_Node*) this->_M_head._M_next;
778 while (__node != 0 && __first != __last)
779 {
780 __node->_M_data = *__first;
781 __prev = __node;
782 __node = (_Node*) __node->_M_next;
783 ++__first;
784 }
785 if (__first != __last)
786 _M_insert_after_range(__prev, __first, __last);
787 else
788 this->_M_erase_after(__prev, 0);
789 }
790
791 template <class _Tp, class _Alloc>
792 inline bool
793 operator==(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
794 {
795 typedef typename slist<_Tp,_Alloc>::const_iterator const_iterator;
796 const_iterator __end1 = _SL1.end();
797 const_iterator __end2 = _SL2.end();
798
799 const_iterator __i1 = _SL1.begin();
800 const_iterator __i2 = _SL2.begin();
801 while (__i1 != __end1 && __i2 != __end2 && *__i1 == *__i2)
802 {
803 ++__i1;
804 ++__i2;
805 }
806 return __i1 == __end1 && __i2 == __end2;
807 }
808
809
810 template <class _Tp, class _Alloc>
811 inline bool
812 operator<(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
813 { return std::lexicographical_compare(_SL1.begin(), _SL1.end(),
814 _SL2.begin(), _SL2.end()); }
815
816 template <class _Tp, class _Alloc>
817 inline bool
818 operator!=(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
819 { return !(_SL1 == _SL2); }
820
821 template <class _Tp, class _Alloc>
822 inline bool
823 operator>(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
824 { return _SL2 < _SL1; }
825
826 template <class _Tp, class _Alloc>
827 inline bool
828 operator<=(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
829 { return !(_SL2 < _SL1); }
830
831 template <class _Tp, class _Alloc>
832 inline bool
833 operator>=(const slist<_Tp, _Alloc>& _SL1, const slist<_Tp, _Alloc>& _SL2)
834 { return !(_SL1 < _SL2); }
835
836 template <class _Tp, class _Alloc>
837 inline void
838 swap(slist<_Tp, _Alloc>& __x, slist<_Tp, _Alloc>& __y)
839 { __x.swap(__y); }
840
841 template <class _Tp, class _Alloc>
842 void
843 slist<_Tp, _Alloc>::resize(size_type __len, const _Tp& __x)
844 {
845 _Node_base* __cur = &this->_M_head;
846 while (__cur->_M_next != 0 && __len > 0)
847 {
848 --__len;
849 __cur = __cur->_M_next;
850 }
851 if (__cur->_M_next)
852 this->_M_erase_after(__cur, 0);
853 else
854 _M_insert_after_fill(__cur, __len, __x);
855 }
856
857 template <class _Tp, class _Alloc>
858 void
859 slist<_Tp, _Alloc>::remove(const _Tp& __val)
860 {
861 _Node_base* __cur = &this->_M_head;
862 while (__cur && __cur->_M_next)
863 {
864 if (((_Node*) __cur->_M_next)->_M_data == __val)
865 this->_M_erase_after(__cur);
866 else
867 __cur = __cur->_M_next;
868 }
869 }
870
871 template <class _Tp, class _Alloc>
872 void
873 slist<_Tp, _Alloc>::unique()
874 {
875 _Node_base* __cur = this->_M_head._M_next;
876 if (__cur)
877 {
878 while (__cur->_M_next)
879 {
880 if (((_Node*)__cur)->_M_data
881 == ((_Node*)(__cur->_M_next))->_M_data)
882 this->_M_erase_after(__cur);
883 else
884 __cur = __cur->_M_next;
885 }
886 }
887 }
888
889 template <class _Tp, class _Alloc>
890 void
891 slist<_Tp, _Alloc>::merge(slist<_Tp, _Alloc>& __x)
892 {
893 _Node_base* __n1 = &this->_M_head;
894 while (__n1->_M_next && __x._M_head._M_next)
895 {
896 if (((_Node*) __x._M_head._M_next)->_M_data
897 < ((_Node*) __n1->_M_next)->_M_data)
898 __slist_splice_after(__n1, &__x._M_head, __x._M_head._M_next);
899 __n1 = __n1->_M_next;
900 }
901 if (__x._M_head._M_next)
902 {
903 __n1->_M_next = __x._M_head._M_next;
904 __x._M_head._M_next = 0;
905 }
906 }
907
908 template <class _Tp, class _Alloc>
909 void
910 slist<_Tp, _Alloc>::sort()
911 {
912 if (this->_M_head._M_next && this->_M_head._M_next->_M_next)
913 {
914 slist __carry;
915 slist __counter[64];
916 int __fill = 0;
917 while (!empty())
918 {
919 __slist_splice_after(&__carry._M_head,
920 &this->_M_head, this->_M_head._M_next);
921 int __i = 0;
922 while (__i < __fill && !__counter[__i].empty())
923 {
924 __counter[__i].merge(__carry);
925 __carry.swap(__counter[__i]);
926 ++__i;
927 }
928 __carry.swap(__counter[__i]);
929 if (__i == __fill)
930 ++__fill;
931 }
932
933 for (int __i = 1; __i < __fill; ++__i)
934 __counter[__i].merge(__counter[__i-1]);
935 this->swap(__counter[__fill-1]);
936 }
937 }
938
939 template <class _Tp, class _Alloc>
940 template <class _Predicate>
941 void slist<_Tp, _Alloc>::remove_if(_Predicate __pred)
942 {
943 _Node_base* __cur = &this->_M_head;
944 while (__cur->_M_next)
945 {
946 if (__pred(((_Node*) __cur->_M_next)->_M_data))
947 this->_M_erase_after(__cur);
948 else
949 __cur = __cur->_M_next;
950 }
951 }
952
953 template <class _Tp, class _Alloc>
954 template <class _BinaryPredicate>
955 void
956 slist<_Tp, _Alloc>::unique(_BinaryPredicate __pred)
957 {
958 _Node* __cur = (_Node*) this->_M_head._M_next;
959 if (__cur)
960 {
961 while (__cur->_M_next)
962 {
963 if (__pred(((_Node*)__cur)->_M_data,
964 ((_Node*)(__cur->_M_next))->_M_data))
965 this->_M_erase_after(__cur);
966 else
967 __cur = (_Node*) __cur->_M_next;
968 }
969 }
970 }
971
972 template <class _Tp, class _Alloc>
973 template <class _StrictWeakOrdering>
974 void
975 slist<_Tp, _Alloc>::merge(slist<_Tp, _Alloc>& __x,
976 _StrictWeakOrdering __comp)
977 {
978 _Node_base* __n1 = &this->_M_head;
979 while (__n1->_M_next && __x._M_head._M_next)
980 {
981 if (__comp(((_Node*) __x._M_head._M_next)->_M_data,
982 ((_Node*) __n1->_M_next)->_M_data))
983 __slist_splice_after(__n1, &__x._M_head, __x._M_head._M_next);
984 __n1 = __n1->_M_next;
985 }
986 if (__x._M_head._M_next)
987 {
988 __n1->_M_next = __x._M_head._M_next;
989 __x._M_head._M_next = 0;
990 }
991 }
992
993 template <class _Tp, class _Alloc>
994 template <class _StrictWeakOrdering>
995 void
996 slist<_Tp, _Alloc>::sort(_StrictWeakOrdering __comp)
997 {
998 if (this->_M_head._M_next && this->_M_head._M_next->_M_next)
999 {
1000 slist __carry;
1001 slist __counter[64];
1002 int __fill = 0;
1003 while (!empty())
1004 {
1005 __slist_splice_after(&__carry._M_head,
1006 &this->_M_head, this->_M_head._M_next);
1007 int __i = 0;
1008 while (__i < __fill && !__counter[__i].empty())
1009 {
1010 __counter[__i].merge(__carry, __comp);
1011 __carry.swap(__counter[__i]);
1012 ++__i;
1013 }
1014 __carry.swap(__counter[__i]);
1015 if (__i == __fill)
1016 ++__fill;
1017 }
1018
1019 for (int __i = 1; __i < __fill; ++__i)
1020 __counter[__i].merge(__counter[__i-1], __comp);
1021 this->swap(__counter[__fill-1]);
1022 }
1023 }
1024
1025_GLIBCXX_END_NAMESPACE_VERSION
1026} // namespace
1027
1028namespace std _GLIBCXX_VISIBILITY(default)
1029{
1030_GLIBCXX_BEGIN_NAMESPACE_VERSION
1031
1032 // Specialization of insert_iterator so that insertions will be constant
1033 // time rather than linear time.
1034 template <class _Tp, class _Alloc>
1035 class insert_iterator<__gnu_cxx::slist<_Tp, _Alloc> >
1036 {
1037 protected:
1038 typedef __gnu_cxx::slist<_Tp, _Alloc> _Container;
1039 _Container* container;
1040 typename _Container::iterator iter;
1041
1042 public:
1043 typedef _Container container_type;
1044 typedef output_iterator_tag iterator_category;
1045 typedef void value_type;
1046 typedef void difference_type;
1047 typedef void pointer;
1048 typedef void reference;
1049
1050 insert_iterator(_Container& __x, typename _Container::iterator __i)
1051 : container(&__x)
1052 {
1053 if (__i == __x.begin())
1054 iter = __x.before_begin();
1055 else
1056 iter = __x.previous(__i);
1057 }
1058
1059 insert_iterator<_Container>&
1060 operator=(const typename _Container::value_type& __value)
1061 {
1062 iter = container->insert_after(iter, __value);
1063 return *this;
1064 }
1065
1066 insert_iterator<_Container>&
1067 operator*()
1068 { return *this; }
1069
1070 insert_iterator<_Container>&
1071 operator++()
1072 { return *this; }
1073
1074 insert_iterator<_Container>&
1075 operator++(int)
1076 { return *this; }
1077 };
1078
1079_GLIBCXX_END_NAMESPACE_VERSION
1080} // namespace
1081
1082#endif
1083

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