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1 : // Set implementation -*- C++ -*-
2 :
3 : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 : // Free Software Foundation, Inc.
5 : //
6 : // This file is part of the GNU ISO C++ Library. This library is free
7 : // software; you can redistribute it and/or modify it under the
8 : // terms of the GNU General Public License as published by the
9 : // Free Software Foundation; either version 3, or (at your option)
10 : // any later version.
11 :
12 : // This library is distributed in the hope that it will be useful,
13 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 : // GNU General Public License for more details.
16 :
17 : // Under Section 7 of GPL version 3, you are granted additional
18 : // permissions described in the GCC Runtime Library Exception, version
19 : // 3.1, as published by the Free Software Foundation.
20 :
21 : // You should have received a copy of the GNU General Public License and
22 : // a copy of the GCC Runtime Library Exception along with this program;
23 : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 : // <http://www.gnu.org/licenses/>.
25 :
26 : /*
27 : *
28 : * Copyright (c) 1994
29 : * Hewlett-Packard Company
30 : *
31 : * Permission to use, copy, modify, distribute and sell this software
32 : * and its documentation for any purpose is hereby granted without fee,
33 : * provided that the above copyright notice appear in all copies and
34 : * that both that copyright notice and this permission notice appear
35 : * in supporting documentation. Hewlett-Packard Company makes no
36 : * representations about the suitability of this software for any
37 : * purpose. It is provided "as is" without express or implied warranty.
38 : *
39 : *
40 : * Copyright (c) 1996,1997
41 : * Silicon Graphics Computer Systems, Inc.
42 : *
43 : * Permission to use, copy, modify, distribute and sell this software
44 : * and its documentation for any purpose is hereby granted without fee,
45 : * provided that the above copyright notice appear in all copies and
46 : * that both that copyright notice and this permission notice appear
47 : * in supporting documentation. Silicon Graphics makes no
48 : * representations about the suitability of this software for any
49 : * purpose. It is provided "as is" without express or implied warranty.
50 : */
51 :
52 : /** @file stl_set.h
53 : * This is an internal header file, included by other library headers.
54 : * You should not attempt to use it directly.
55 : */
56 :
57 : #ifndef _STL_SET_H
58 : #define _STL_SET_H 1
59 :
60 : #include <bits/concept_check.h>
61 : #include <initializer_list>
62 :
63 : _GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)
64 :
65 : /**
66 : * @brief A standard container made up of unique keys, which can be
67 : * retrieved in logarithmic time.
68 : *
69 : * @ingroup associative_containers
70 : *
71 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
72 : * <a href="tables.html#66">reversible container</a>, and an
73 : * <a href="tables.html#69">associative container</a> (using unique keys).
74 : *
75 : * Sets support bidirectional iterators.
76 : *
77 : * @param Key Type of key objects.
78 : * @param Compare Comparison function object type, defaults to less<Key>.
79 : * @param Alloc Allocator type, defaults to allocator<Key>.
80 : *
81 : * The private tree data is declared exactly the same way for set and
82 : * multiset; the distinction is made entirely in how the tree functions are
83 : * called (*_unique versus *_equal, same as the standard).
84 : */
85 : template<typename _Key, typename _Compare = std::less<_Key>,
86 : typename _Alloc = std::allocator<_Key> >
87 : class set
88 163 : {
89 : // concept requirements
90 : typedef typename _Alloc::value_type _Alloc_value_type;
91 : __glibcxx_class_requires(_Key, _SGIAssignableConcept)
92 : __glibcxx_class_requires4(_Compare, bool, _Key, _Key,
93 : _BinaryFunctionConcept)
94 : __glibcxx_class_requires2(_Key, _Alloc_value_type, _SameTypeConcept)
95 :
96 : public:
97 : // typedefs:
98 : //@{
99 : /// Public typedefs.
100 : typedef _Key key_type;
101 : typedef _Key value_type;
102 : typedef _Compare key_compare;
103 : typedef _Compare value_compare;
104 : typedef _Alloc allocator_type;
105 : //@}
106 :
107 : private:
108 : typedef typename _Alloc::template rebind<_Key>::other _Key_alloc_type;
109 :
110 : typedef _Rb_tree<key_type, value_type, _Identity<value_type>,
111 : key_compare, _Key_alloc_type> _Rep_type;
112 : _Rep_type _M_t; // Red-black tree representing set.
113 :
114 : public:
115 : //@{
116 : /// Iterator-related typedefs.
117 : typedef typename _Key_alloc_type::pointer pointer;
118 : typedef typename _Key_alloc_type::const_pointer const_pointer;
119 : typedef typename _Key_alloc_type::reference reference;
120 : typedef typename _Key_alloc_type::const_reference const_reference;
121 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
122 : // DR 103. set::iterator is required to be modifiable,
123 : // but this allows modification of keys.
124 : typedef typename _Rep_type::const_iterator iterator;
125 : typedef typename _Rep_type::const_iterator const_iterator;
126 : typedef typename _Rep_type::const_reverse_iterator reverse_iterator;
127 : typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
128 : typedef typename _Rep_type::size_type size_type;
129 : typedef typename _Rep_type::difference_type difference_type;
130 : //@}
131 :
132 : // allocation/deallocation
133 : /**
134 : * @brief Default constructor creates no elements.
135 : */
136 328 : set()
137 328 : : _M_t() { }
138 :
139 : /**
140 : * @brief Creates a %set with no elements.
141 : * @param comp Comparator to use.
142 : * @param a An allocator object.
143 : */
144 : explicit
145 : set(const _Compare& __comp,
146 : const allocator_type& __a = allocator_type())
147 : : _M_t(__comp, __a) { }
148 :
149 : /**
150 : * @brief Builds a %set from a range.
151 : * @param first An input iterator.
152 : * @param last An input iterator.
153 : *
154 : * Create a %set consisting of copies of the elements from [first,last).
155 : * This is linear in N if the range is already sorted, and NlogN
156 : * otherwise (where N is distance(first,last)).
157 : */
158 : template<typename _InputIterator>
159 0 : set(_InputIterator __first, _InputIterator __last)
160 0 : : _M_t()
161 0 : { _M_t._M_insert_unique(__first, __last); }
162 :
163 : /**
164 : * @brief Builds a %set from a range.
165 : * @param first An input iterator.
166 : * @param last An input iterator.
167 : * @param comp A comparison functor.
168 : * @param a An allocator object.
169 : *
170 : * Create a %set consisting of copies of the elements from [first,last).
171 : * This is linear in N if the range is already sorted, and NlogN
172 : * otherwise (where N is distance(first,last)).
173 : */
174 : template<typename _InputIterator>
175 : set(_InputIterator __first, _InputIterator __last,
176 : const _Compare& __comp,
177 : const allocator_type& __a = allocator_type())
178 : : _M_t(__comp, __a)
179 : { _M_t._M_insert_unique(__first, __last); }
180 :
181 : /**
182 : * @brief %Set copy constructor.
183 : * @param x A %set of identical element and allocator types.
184 : *
185 : * The newly-created %set uses a copy of the allocation object used
186 : * by @a x.
187 : */
188 : set(const set& __x)
189 : : _M_t(__x._M_t) { }
190 :
191 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
192 : /**
193 : * @brief %Set move constructor
194 : * @param x A %set of identical element and allocator types.
195 : *
196 : * The newly-created %set contains the exact contents of @a x.
197 : * The contents of @a x are a valid, but unspecified %set.
198 : */
199 : set(set&& __x)
200 : : _M_t(std::forward<_Rep_type>(__x._M_t)) { }
201 :
202 : /**
203 : * @brief Builds a %set from an initializer_list.
204 : * @param l An initializer_list.
205 : * @param comp A comparison functor.
206 : * @param a An allocator object.
207 : *
208 : * Create a %set consisting of copies of the elements in the list.
209 : * This is linear in N if the list is already sorted, and NlogN
210 : * otherwise (where N is @a l.size()).
211 : */
212 : set(initializer_list<value_type> __l,
213 : const _Compare& __comp = _Compare(),
214 : const allocator_type& __a = allocator_type())
215 : : _M_t(__comp, __a)
216 : { _M_t._M_insert_unique(__l.begin(), __l.end()); }
217 : #endif
218 :
219 : /**
220 : * @brief %Set assignment operator.
221 : * @param x A %set of identical element and allocator types.
222 : *
223 : * All the elements of @a x are copied, but unlike the copy constructor,
224 : * the allocator object is not copied.
225 : */
226 : set&
227 : operator=(const set& __x)
228 : {
229 : _M_t = __x._M_t;
230 : return *this;
231 : }
232 :
233 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
234 : /**
235 : * @brief %Set move assignment operator.
236 : * @param x A %set of identical element and allocator types.
237 : *
238 : * The contents of @a x are moved into this %set (without copying).
239 : * @a x is a valid, but unspecified %set.
240 : */
241 : set&
242 : operator=(set&& __x)
243 : {
244 : // NB: DR 675.
245 : this->clear();
246 : this->swap(__x);
247 : return *this;
248 : }
249 :
250 : /**
251 : * @brief %Set list assignment operator.
252 : * @param l An initializer_list.
253 : *
254 : * This function fills a %set with copies of the elements in the
255 : * initializer list @a l.
256 : *
257 : * Note that the assignment completely changes the %set and
258 : * that the resulting %set's size is the same as the number
259 : * of elements assigned. Old data may be lost.
260 : */
261 : set&
262 : operator=(initializer_list<value_type> __l)
263 : {
264 : this->clear();
265 : this->insert(__l.begin(), __l.end());
266 : return *this;
267 : }
268 : #endif
269 :
270 : // accessors:
271 :
272 : /// Returns the comparison object with which the %set was constructed.
273 : key_compare
274 : key_comp() const
275 : { return _M_t.key_comp(); }
276 : /// Returns the comparison object with which the %set was constructed.
277 : value_compare
278 : value_comp() const
279 : { return _M_t.key_comp(); }
280 : /// Returns the allocator object with which the %set was constructed.
281 : allocator_type
282 : get_allocator() const
283 : { return _M_t.get_allocator(); }
284 :
285 : /**
286 : * Returns a read-only (constant) iterator that points to the first
287 : * element in the %set. Iteration is done in ascending order according
288 : * to the keys.
289 : */
290 : iterator
291 1 : begin() const
292 1 : { return _M_t.begin(); }
293 :
294 : /**
295 : * Returns a read-only (constant) iterator that points one past the last
296 : * element in the %set. Iteration is done in ascending order according
297 : * to the keys.
298 : */
299 : iterator
300 6145 : end() const
301 6145 : { return _M_t.end(); }
302 :
303 : /**
304 : * Returns a read-only (constant) iterator that points to the last
305 : * element in the %set. Iteration is done in descending order according
306 : * to the keys.
307 : */
308 : reverse_iterator
309 : rbegin() const
310 : { return _M_t.rbegin(); }
311 :
312 : /**
313 : * Returns a read-only (constant) reverse iterator that points to the
314 : * last pair in the %set. Iteration is done in descending order
315 : * according to the keys.
316 : */
317 : reverse_iterator
318 : rend() const
319 : { return _M_t.rend(); }
320 :
321 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
322 : /**
323 : * Returns a read-only (constant) iterator that points to the first
324 : * element in the %set. Iteration is done in ascending order according
325 : * to the keys.
326 : */
327 : iterator
328 : cbegin() const
329 : { return _M_t.begin(); }
330 :
331 : /**
332 : * Returns a read-only (constant) iterator that points one past the last
333 : * element in the %set. Iteration is done in ascending order according
334 : * to the keys.
335 : */
336 : iterator
337 : cend() const
338 : { return _M_t.end(); }
339 :
340 : /**
341 : * Returns a read-only (constant) iterator that points to the last
342 : * element in the %set. Iteration is done in descending order according
343 : * to the keys.
344 : */
345 : reverse_iterator
346 : crbegin() const
347 : { return _M_t.rbegin(); }
348 :
349 : /**
350 : * Returns a read-only (constant) reverse iterator that points to the
351 : * last pair in the %set. Iteration is done in descending order
352 : * according to the keys.
353 : */
354 : reverse_iterator
355 : crend() const
356 : { return _M_t.rend(); }
357 : #endif
358 :
359 : /// Returns true if the %set is empty.
360 : bool
361 : empty() const
362 : { return _M_t.empty(); }
363 :
364 : /// Returns the size of the %set.
365 : size_type
366 1 : size() const
367 1 : { return _M_t.size(); }
368 :
369 : /// Returns the maximum size of the %set.
370 : size_type
371 : max_size() const
372 : { return _M_t.max_size(); }
373 :
374 : /**
375 : * @brief Swaps data with another %set.
376 : * @param x A %set of the same element and allocator types.
377 : *
378 : * This exchanges the elements between two sets in constant time.
379 : * (It is only swapping a pointer, an integer, and an instance of
380 : * the @c Compare type (which itself is often stateless and empty), so it
381 : * should be quite fast.)
382 : * Note that the global std::swap() function is specialized such that
383 : * std::swap(s1,s2) will feed to this function.
384 : */
385 : void
386 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
387 : swap(set&& __x)
388 : #else
389 : swap(set& __x)
390 : #endif
391 : { _M_t.swap(__x._M_t); }
392 :
393 : // insert/erase
394 : /**
395 : * @brief Attempts to insert an element into the %set.
396 : * @param x Element to be inserted.
397 : * @return A pair, of which the first element is an iterator that points
398 : * to the possibly inserted element, and the second is a bool
399 : * that is true if the element was actually inserted.
400 : *
401 : * This function attempts to insert an element into the %set. A %set
402 : * relies on unique keys and thus an element is only inserted if it is
403 : * not already present in the %set.
404 : *
405 : * Insertion requires logarithmic time.
406 : */
407 : std::pair<iterator, bool>
408 73940 : insert(const value_type& __x)
409 : {
410 : std::pair<typename _Rep_type::iterator, bool> __p =
411 73940 : _M_t._M_insert_unique(__x);
412 73940 : return std::pair<iterator, bool>(__p.first, __p.second);
413 : }
414 :
415 : /**
416 : * @brief Attempts to insert an element into the %set.
417 : * @param position An iterator that serves as a hint as to where the
418 : * element should be inserted.
419 : * @param x Element to be inserted.
420 : * @return An iterator that points to the element with key of @a x (may
421 : * or may not be the element passed in).
422 : *
423 : * This function is not concerned about whether the insertion took place,
424 : * and thus does not return a boolean like the single-argument insert()
425 : * does. Note that the first parameter is only a hint and can
426 : * potentially improve the performance of the insertion process. A bad
427 : * hint would cause no gains in efficiency.
428 : *
429 : * For more on "hinting", see:
430 : * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
431 : *
432 : * Insertion requires logarithmic time (if the hint is not taken).
433 : */
434 : iterator
435 : insert(iterator __position, const value_type& __x)
436 : { return _M_t._M_insert_unique_(__position, __x); }
437 :
438 : /**
439 : * @brief A template function that attempts to insert a range
440 : * of elements.
441 : * @param first Iterator pointing to the start of the range to be
442 : * inserted.
443 : * @param last Iterator pointing to the end of the range.
444 : *
445 : * Complexity similar to that of the range constructor.
446 : */
447 : template<typename _InputIterator>
448 : void
449 : insert(_InputIterator __first, _InputIterator __last)
450 : { _M_t._M_insert_unique(__first, __last); }
451 :
452 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
453 : /**
454 : * @brief Attempts to insert a list of elements into the %set.
455 : * @param list A std::initializer_list<value_type> of elements
456 : * to be inserted.
457 : *
458 : * Complexity similar to that of the range constructor.
459 : */
460 : void
461 : insert(initializer_list<value_type> __l)
462 : { this->insert(__l.begin(), __l.end()); }
463 : #endif
464 :
465 : /**
466 : * @brief Erases an element from a %set.
467 : * @param position An iterator pointing to the element to be erased.
468 : *
469 : * This function erases an element, pointed to by the given iterator,
470 : * from a %set. Note that this function only erases the element, and
471 : * that if the element is itself a pointer, the pointed-to memory is not
472 : * touched in any way. Managing the pointer is the user's responsibility.
473 : */
474 : void
475 : erase(iterator __position)
476 : { _M_t.erase(__position); }
477 :
478 : /**
479 : * @brief Erases elements according to the provided key.
480 : * @param x Key of element to be erased.
481 : * @return The number of elements erased.
482 : *
483 : * This function erases all the elements located by the given key from
484 : * a %set.
485 : * Note that this function only erases the element, and that if
486 : * the element is itself a pointer, the pointed-to memory is not touched
487 : * in any way. Managing the pointer is the user's responsibility.
488 : */
489 : size_type
490 : erase(const key_type& __x)
491 : { return _M_t.erase(__x); }
492 :
493 : /**
494 : * @brief Erases a [first,last) range of elements from a %set.
495 : * @param first Iterator pointing to the start of the range to be
496 : * erased.
497 : * @param last Iterator pointing to the end of the range to be erased.
498 : *
499 : * This function erases a sequence of elements from a %set.
500 : * Note that this function only erases the element, and that if
501 : * the element is itself a pointer, the pointed-to memory is not touched
502 : * in any way. Managing the pointer is the user's responsibility.
503 : */
504 : void
505 : erase(iterator __first, iterator __last)
506 : { _M_t.erase(__first, __last); }
507 :
508 : /**
509 : * Erases all elements in a %set. Note that this function only erases
510 : * the elements, and that if the elements themselves are pointers, the
511 : * pointed-to memory is not touched in any way. Managing the pointer is
512 : * the user's responsibility.
513 : */
514 : void
515 : clear()
516 : { _M_t.clear(); }
517 :
518 : // set operations:
519 :
520 : /**
521 : * @brief Finds the number of elements.
522 : * @param x Element to located.
523 : * @return Number of elements with specified key.
524 : *
525 : * This function only makes sense for multisets; for set the result will
526 : * either be 0 (not present) or 1 (present).
527 : */
528 : size_type
529 : count(const key_type& __x) const
530 : { return _M_t.find(__x) == _M_t.end() ? 0 : 1; }
531 :
532 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
533 : // 214. set::find() missing const overload
534 : //@{
535 : /**
536 : * @brief Tries to locate an element in a %set.
537 : * @param x Element to be located.
538 : * @return Iterator pointing to sought-after element, or end() if not
539 : * found.
540 : *
541 : * This function takes a key and tries to locate the element with which
542 : * the key matches. If successful the function returns an iterator
543 : * pointing to the sought after element. If unsuccessful it returns the
544 : * past-the-end ( @c end() ) iterator.
545 : */
546 : iterator
547 6101 : find(const key_type& __x)
548 6101 : { return _M_t.find(__x); }
549 :
550 : const_iterator
551 : find(const key_type& __x) const
552 : { return _M_t.find(__x); }
553 : //@}
554 :
555 : //@{
556 : /**
557 : * @brief Finds the beginning of a subsequence matching given key.
558 : * @param x Key to be located.
559 : * @return Iterator pointing to first element equal to or greater
560 : * than key, or end().
561 : *
562 : * This function returns the first element of a subsequence of elements
563 : * that matches the given key. If unsuccessful it returns an iterator
564 : * pointing to the first element that has a greater value than given key
565 : * or end() if no such element exists.
566 : */
567 : iterator
568 : lower_bound(const key_type& __x)
569 : { return _M_t.lower_bound(__x); }
570 :
571 : const_iterator
572 : lower_bound(const key_type& __x) const
573 : { return _M_t.lower_bound(__x); }
574 : //@}
575 :
576 : //@{
577 : /**
578 : * @brief Finds the end of a subsequence matching given key.
579 : * @param x Key to be located.
580 : * @return Iterator pointing to the first element
581 : * greater than key, or end().
582 : */
583 : iterator
584 : upper_bound(const key_type& __x)
585 : { return _M_t.upper_bound(__x); }
586 :
587 : const_iterator
588 : upper_bound(const key_type& __x) const
589 : { return _M_t.upper_bound(__x); }
590 : //@}
591 :
592 : //@{
593 : /**
594 : * @brief Finds a subsequence matching given key.
595 : * @param x Key to be located.
596 : * @return Pair of iterators that possibly points to the subsequence
597 : * matching given key.
598 : *
599 : * This function is equivalent to
600 : * @code
601 : * std::make_pair(c.lower_bound(val),
602 : * c.upper_bound(val))
603 : * @endcode
604 : * (but is faster than making the calls separately).
605 : *
606 : * This function probably only makes sense for multisets.
607 : */
608 : std::pair<iterator, iterator>
609 : equal_range(const key_type& __x)
610 : { return _M_t.equal_range(__x); }
611 :
612 : std::pair<const_iterator, const_iterator>
613 : equal_range(const key_type& __x) const
614 : { return _M_t.equal_range(__x); }
615 : //@}
616 :
617 : template<typename _K1, typename _C1, typename _A1>
618 : friend bool
619 : operator==(const set<_K1, _C1, _A1>&, const set<_K1, _C1, _A1>&);
620 :
621 : template<typename _K1, typename _C1, typename _A1>
622 : friend bool
623 : operator<(const set<_K1, _C1, _A1>&, const set<_K1, _C1, _A1>&);
624 : };
625 :
626 :
627 : /**
628 : * @brief Set equality comparison.
629 : * @param x A %set.
630 : * @param y A %set of the same type as @a x.
631 : * @return True iff the size and elements of the sets are equal.
632 : *
633 : * This is an equivalence relation. It is linear in the size of the sets.
634 : * Sets are considered equivalent if their sizes are equal, and if
635 : * corresponding elements compare equal.
636 : */
637 : template<typename _Key, typename _Compare, typename _Alloc>
638 : inline bool
639 : operator==(const set<_Key, _Compare, _Alloc>& __x,
640 : const set<_Key, _Compare, _Alloc>& __y)
641 : { return __x._M_t == __y._M_t; }
642 :
643 : /**
644 : * @brief Set ordering relation.
645 : * @param x A %set.
646 : * @param y A %set of the same type as @a x.
647 : * @return True iff @a x is lexicographically less than @a y.
648 : *
649 : * This is a total ordering relation. It is linear in the size of the
650 : * maps. The elements must be comparable with @c <.
651 : *
652 : * See std::lexicographical_compare() for how the determination is made.
653 : */
654 : template<typename _Key, typename _Compare, typename _Alloc>
655 : inline bool
656 : operator<(const set<_Key, _Compare, _Alloc>& __x,
657 : const set<_Key, _Compare, _Alloc>& __y)
658 : { return __x._M_t < __y._M_t; }
659 :
660 : /// Returns !(x == y).
661 : template<typename _Key, typename _Compare, typename _Alloc>
662 : inline bool
663 : operator!=(const set<_Key, _Compare, _Alloc>& __x,
664 : const set<_Key, _Compare, _Alloc>& __y)
665 : { return !(__x == __y); }
666 :
667 : /// Returns y < x.
668 : template<typename _Key, typename _Compare, typename _Alloc>
669 : inline bool
670 : operator>(const set<_Key, _Compare, _Alloc>& __x,
671 : const set<_Key, _Compare, _Alloc>& __y)
672 : { return __y < __x; }
673 :
674 : /// Returns !(y < x)
675 : template<typename _Key, typename _Compare, typename _Alloc>
676 : inline bool
677 : operator<=(const set<_Key, _Compare, _Alloc>& __x,
678 : const set<_Key, _Compare, _Alloc>& __y)
679 : { return !(__y < __x); }
680 :
681 : /// Returns !(x < y)
682 : template<typename _Key, typename _Compare, typename _Alloc>
683 : inline bool
684 : operator>=(const set<_Key, _Compare, _Alloc>& __x,
685 : const set<_Key, _Compare, _Alloc>& __y)
686 : { return !(__x < __y); }
687 :
688 : /// See std::set::swap().
689 : template<typename _Key, typename _Compare, typename _Alloc>
690 : inline void
691 : swap(set<_Key, _Compare, _Alloc>& __x, set<_Key, _Compare, _Alloc>& __y)
692 : { __x.swap(__y); }
693 :
694 : #ifdef __GXX_EXPERIMENTAL_CXX0X__
695 : template<typename _Key, typename _Compare, typename _Alloc>
696 : inline void
697 : swap(set<_Key, _Compare, _Alloc>&& __x, set<_Key, _Compare, _Alloc>& __y)
698 : { __x.swap(__y); }
699 :
700 : template<typename _Key, typename _Compare, typename _Alloc>
701 : inline void
702 : swap(set<_Key, _Compare, _Alloc>& __x, set<_Key, _Compare, _Alloc>&& __y)
703 : { __x.swap(__y); }
704 : #endif
705 :
706 : _GLIBCXX_END_NESTED_NAMESPACE
707 :
708 : #endif /* _STL_SET_H */
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