2 //===----------------------------------------------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP___TREE
12 #define _LIBCPP___TREE
20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21 #pragma GCC system_header
24 _LIBCPP_BEGIN_NAMESPACE_STD
26 template <class _Tp, class _Compare, class _Allocator> class __tree;
27 template <class _Tp, class _NodePtr, class _DiffType>
28 class _LIBCPP_TYPE_VIS_ONLY __tree_iterator;
29 template <class _Tp, class _ConstNodePtr, class _DiffType>
30 class _LIBCPP_TYPE_VIS_ONLY __tree_const_iterator;
32 template <class _Pointer> class __tree_end_node;
33 template <class _VoidPtr> class __tree_node_base;
34 template <class _Tp, class _VoidPtr> class __tree_node;
36 #ifndef _LIBCPP_CXX03_LANG
37 template <class _Key, class _Value>
40 template <class _Key, class _Value>
44 template <class _Allocator> class __map_node_destructor;
45 template <class _TreeIterator> class _LIBCPP_TYPE_VIS_ONLY __map_iterator;
46 template <class _TreeIterator> class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator;
52 The algorithms taking _NodePtr are red black tree algorithms. Those
53 algorithms taking a parameter named __root should assume that __root
54 points to a proper red black tree (unless otherwise specified).
56 Each algorithm herein assumes that __root->__parent_ points to a non-null
57 structure which has a member __left_ which points back to __root. No other
58 member is read or written to at __root->__parent_.
60 __root->__parent_ will be referred to below (in comments only) as end_node.
61 end_node->__left_ is an externably accessible lvalue for __root, and can be
62 changed by node insertion and removal (without explicit reference to end_node).
64 All nodes (with the exception of end_node), even the node referred to as
65 __root, have a non-null __parent_ field.
69 // Returns: true if __x is a left child of its parent, else false
70 // Precondition: __x != nullptr.
71 template <class _NodePtr>
72 inline _LIBCPP_INLINE_VISIBILITY
74 __tree_is_left_child(_NodePtr __x) _NOEXCEPT
76 return __x == __x->__parent_->__left_;
79 // Determintes if the subtree rooted at __x is a proper red black subtree. If
80 // __x is a proper subtree, returns the black height (null counts as 1). If
81 // __x is an improper subtree, returns 0.
82 template <class _NodePtr>
84 __tree_sub_invariant(_NodePtr __x)
88 // parent consistency checked by caller
89 // check __x->__left_ consistency
90 if (__x->__left_ != nullptr && __x->__left_->__parent_ != __x)
92 // check __x->__right_ consistency
93 if (__x->__right_ != nullptr && __x->__right_->__parent_ != __x)
95 // check __x->__left_ != __x->__right_ unless both are nullptr
96 if (__x->__left_ == __x->__right_ && __x->__left_ != nullptr)
98 // If this is red, neither child can be red
99 if (!__x->__is_black_)
101 if (__x->__left_ && !__x->__left_->__is_black_)
103 if (__x->__right_ && !__x->__right_->__is_black_)
106 unsigned __h = __tree_sub_invariant(__x->__left_);
108 return 0; // invalid left subtree
109 if (__h != __tree_sub_invariant(__x->__right_))
110 return 0; // invalid or different height right subtree
111 return __h + __x->__is_black_; // return black height of this node
114 // Determintes if the red black tree rooted at __root is a proper red black tree.
115 // __root == nullptr is a proper tree. Returns true is __root is a proper
116 // red black tree, else returns false.
117 template <class _NodePtr>
119 __tree_invariant(_NodePtr __root)
121 if (__root == nullptr)
123 // check __x->__parent_ consistency
124 if (__root->__parent_ == nullptr)
126 if (!__tree_is_left_child(__root))
128 // root must be black
129 if (!__root->__is_black_)
131 // do normal node checks
132 return __tree_sub_invariant(__root) != 0;
135 // Returns: pointer to the left-most node under __x.
136 // Precondition: __x != nullptr.
137 template <class _NodePtr>
138 inline _LIBCPP_INLINE_VISIBILITY
140 __tree_min(_NodePtr __x) _NOEXCEPT
142 while (__x->__left_ != nullptr)
147 // Returns: pointer to the right-most node under __x.
148 // Precondition: __x != nullptr.
149 template <class _NodePtr>
150 inline _LIBCPP_INLINE_VISIBILITY
152 __tree_max(_NodePtr __x) _NOEXCEPT
154 while (__x->__right_ != nullptr)
159 // Returns: pointer to the next in-order node after __x.
160 // Precondition: __x != nullptr.
161 template <class _NodePtr>
163 __tree_next(_NodePtr __x) _NOEXCEPT
165 if (__x->__right_ != nullptr)
166 return __tree_min(__x->__right_);
167 while (!__tree_is_left_child(__x))
168 __x = __x->__parent_unsafe();
169 return __x->__parent_unsafe();
172 template <class _EndNodePtr, class _NodePtr>
173 inline _LIBCPP_INLINE_VISIBILITY
175 __tree_next_iter(_NodePtr __x) _NOEXCEPT
177 if (__x->__right_ != nullptr)
178 return static_cast<_EndNodePtr>(__tree_min(__x->__right_));
179 while (!__tree_is_left_child(__x))
180 __x = __x->__parent_unsafe();
181 return static_cast<_EndNodePtr>(__x->__parent_);
184 // Returns: pointer to the previous in-order node before __x.
185 // Precondition: __x != nullptr.
186 // Note: __x may be the end node.
187 template <class _NodePtr, class _EndNodePtr>
188 inline _LIBCPP_INLINE_VISIBILITY
190 __tree_prev_iter(_EndNodePtr __x) _NOEXCEPT
192 if (__x->__left_ != nullptr)
193 return __tree_max(__x->__left_);
194 _NodePtr __xx = static_cast<_NodePtr>(__x);
195 while (__tree_is_left_child(__xx))
196 __xx = __xx->__parent_unsafe();
197 return __xx->__parent_unsafe();
200 // Returns: pointer to a node which has no children
201 // Precondition: __x != nullptr.
202 template <class _NodePtr>
204 __tree_leaf(_NodePtr __x) _NOEXCEPT
208 if (__x->__left_ != nullptr)
213 if (__x->__right_ != nullptr)
223 // Effects: Makes __x->__right_ the subtree root with __x as its left child
224 // while preserving in-order order.
225 // Precondition: __x->__right_ != nullptr
226 template <class _NodePtr>
228 __tree_left_rotate(_NodePtr __x) _NOEXCEPT
230 _NodePtr __y = __x->__right_;
231 __x->__right_ = __y->__left_;
232 if (__x->__right_ != nullptr)
233 __x->__right_->__set_parent(__x);
234 __y->__parent_ = __x->__parent_;
235 if (__tree_is_left_child(__x))
236 __x->__parent_->__left_ = __y;
238 __x->__parent_unsafe()->__right_ = __y;
240 __x->__set_parent(__y);
243 // Effects: Makes __x->__left_ the subtree root with __x as its right child
244 // while preserving in-order order.
245 // Precondition: __x->__left_ != nullptr
246 template <class _NodePtr>
248 __tree_right_rotate(_NodePtr __x) _NOEXCEPT
250 _NodePtr __y = __x->__left_;
251 __x->__left_ = __y->__right_;
252 if (__x->__left_ != nullptr)
253 __x->__left_->__set_parent(__x);
254 __y->__parent_ = __x->__parent_;
255 if (__tree_is_left_child(__x))
256 __x->__parent_->__left_ = __y;
258 __x->__parent_unsafe()->__right_ = __y;
260 __x->__set_parent(__y);
263 // Effects: Rebalances __root after attaching __x to a leaf.
264 // Precondition: __root != nulptr && __x != nullptr.
265 // __x has no children.
266 // __x == __root or == a direct or indirect child of __root.
267 // If __x were to be unlinked from __root (setting __root to
268 // nullptr if __root == __x), __tree_invariant(__root) == true.
269 // Postcondition: __tree_invariant(end_node->__left_) == true. end_node->__left_
270 // may be different than the value passed in as __root.
271 template <class _NodePtr>
273 __tree_balance_after_insert(_NodePtr __root, _NodePtr __x) _NOEXCEPT
275 __x->__is_black_ = __x == __root;
276 while (__x != __root && !__x->__parent_unsafe()->__is_black_)
278 // __x->__parent_ != __root because __x->__parent_->__is_black == false
279 if (__tree_is_left_child(__x->__parent_unsafe()))
281 _NodePtr __y = __x->__parent_unsafe()->__parent_unsafe()->__right_;
282 if (__y != nullptr && !__y->__is_black_)
284 __x = __x->__parent_unsafe();
285 __x->__is_black_ = true;
286 __x = __x->__parent_unsafe();
287 __x->__is_black_ = __x == __root;
288 __y->__is_black_ = true;
292 if (!__tree_is_left_child(__x))
294 __x = __x->__parent_unsafe();
295 __tree_left_rotate(__x);
297 __x = __x->__parent_unsafe();
298 __x->__is_black_ = true;
299 __x = __x->__parent_unsafe();
300 __x->__is_black_ = false;
301 __tree_right_rotate(__x);
307 _NodePtr __y = __x->__parent_unsafe()->__parent_->__left_;
308 if (__y != nullptr && !__y->__is_black_)
310 __x = __x->__parent_unsafe();
311 __x->__is_black_ = true;
312 __x = __x->__parent_unsafe();
313 __x->__is_black_ = __x == __root;
314 __y->__is_black_ = true;
318 if (__tree_is_left_child(__x))
320 __x = __x->__parent_unsafe();
321 __tree_right_rotate(__x);
323 __x = __x->__parent_unsafe();
324 __x->__is_black_ = true;
325 __x = __x->__parent_unsafe();
326 __x->__is_black_ = false;
327 __tree_left_rotate(__x);
334 // Precondition: __root != nullptr && __z != nullptr.
335 // __tree_invariant(__root) == true.
336 // __z == __root or == a direct or indirect child of __root.
337 // Effects: unlinks __z from the tree rooted at __root, rebalancing as needed.
338 // Postcondition: __tree_invariant(end_node->__left_) == true && end_node->__left_
339 // nor any of its children refer to __z. end_node->__left_
340 // may be different than the value passed in as __root.
341 template <class _NodePtr>
343 __tree_remove(_NodePtr __root, _NodePtr __z) _NOEXCEPT
345 // __z will be removed from the tree. Client still needs to destruct/deallocate it
346 // __y is either __z, or if __z has two children, __tree_next(__z).
347 // __y will have at most one child.
348 // __y will be the initial hole in the tree (make the hole at a leaf)
349 _NodePtr __y = (__z->__left_ == nullptr || __z->__right_ == nullptr) ?
350 __z : __tree_next(__z);
351 // __x is __y's possibly null single child
352 _NodePtr __x = __y->__left_ != nullptr ? __y->__left_ : __y->__right_;
353 // __w is __x's possibly null uncle (will become __x's sibling)
354 _NodePtr __w = nullptr;
355 // link __x to __y's parent, and find __w
357 __x->__parent_ = __y->__parent_;
358 if (__tree_is_left_child(__y))
360 __y->__parent_->__left_ = __x;
362 __w = __y->__parent_unsafe()->__right_;
364 __root = __x; // __w == nullptr
368 __y->__parent_unsafe()->__right_ = __x;
369 // __y can't be root if it is a right child
370 __w = __y->__parent_->__left_;
372 bool __removed_black = __y->__is_black_;
373 // If we didn't remove __z, do so now by splicing in __y for __z,
374 // but copy __z's color. This does not impact __x or __w.
377 // __z->__left_ != nulptr but __z->__right_ might == __x == nullptr
378 __y->__parent_ = __z->__parent_;
379 if (__tree_is_left_child(__z))
380 __y->__parent_->__left_ = __y;
382 __y->__parent_unsafe()->__right_ = __y;
383 __y->__left_ = __z->__left_;
384 __y->__left_->__set_parent(__y);
385 __y->__right_ = __z->__right_;
386 if (__y->__right_ != nullptr)
387 __y->__right_->__set_parent(__y);
388 __y->__is_black_ = __z->__is_black_;
392 // There is no need to rebalance if we removed a red, or if we removed
394 if (__removed_black && __root != nullptr)
397 // __x has an implicit black color (transferred from the removed __y)
398 // associated with it, no matter what its color is.
399 // If __x is __root (in which case it can't be null), it is supposed
400 // to be black anyway, and if it is doubly black, then the double
401 // can just be ignored.
402 // If __x is red (in which case it can't be null), then it can absorb
403 // the implicit black just by setting its color to black.
404 // Since __y was black and only had one child (which __x points to), __x
405 // is either red with no children, else null, otherwise __y would have
406 // different black heights under left and right pointers.
407 // if (__x == __root || __x != nullptr && !__x->__is_black_)
409 __x->__is_black_ = true;
412 // Else __x isn't root, and is "doubly black", even though it may
413 // be null. __w can not be null here, else the parent would
414 // see a black height >= 2 on the __x side and a black height
415 // of 1 on the __w side (__w must be a non-null black or a red
416 // with a non-null black child).
419 if (!__tree_is_left_child(__w)) // if x is left child
421 if (!__w->__is_black_)
423 __w->__is_black_ = true;
424 __w->__parent_unsafe()->__is_black_ = false;
425 __tree_left_rotate(__w->__parent_unsafe());
426 // __x is still valid
427 // reset __root only if necessary
428 if (__root == __w->__left_)
430 // reset sibling, and it still can't be null
431 __w = __w->__left_->__right_;
433 // __w->__is_black_ is now true, __w may have null children
434 if ((__w->__left_ == nullptr || __w->__left_->__is_black_) &&
435 (__w->__right_ == nullptr || __w->__right_->__is_black_))
437 __w->__is_black_ = false;
438 __x = __w->__parent_unsafe();
439 // __x can no longer be null
440 if (__x == __root || !__x->__is_black_)
442 __x->__is_black_ = true;
445 // reset sibling, and it still can't be null
446 __w = __tree_is_left_child(__x) ?
447 __x->__parent_unsafe()->__right_ :
448 __x->__parent_->__left_;
451 else // __w has a red child
453 if (__w->__right_ == nullptr || __w->__right_->__is_black_)
455 // __w left child is non-null and red
456 __w->__left_->__is_black_ = true;
457 __w->__is_black_ = false;
458 __tree_right_rotate(__w);
459 // __w is known not to be root, so root hasn't changed
460 // reset sibling, and it still can't be null
461 __w = __w->__parent_unsafe();
463 // __w has a right red child, left child may be null
464 __w->__is_black_ = __w->__parent_unsafe()->__is_black_;
465 __w->__parent_unsafe()->__is_black_ = true;
466 __w->__right_->__is_black_ = true;
467 __tree_left_rotate(__w->__parent_unsafe());
473 if (!__w->__is_black_)
475 __w->__is_black_ = true;
476 __w->__parent_unsafe()->__is_black_ = false;
477 __tree_right_rotate(__w->__parent_unsafe());
478 // __x is still valid
479 // reset __root only if necessary
480 if (__root == __w->__right_)
482 // reset sibling, and it still can't be null
483 __w = __w->__right_->__left_;
485 // __w->__is_black_ is now true, __w may have null children
486 if ((__w->__left_ == nullptr || __w->__left_->__is_black_) &&
487 (__w->__right_ == nullptr || __w->__right_->__is_black_))
489 __w->__is_black_ = false;
490 __x = __w->__parent_unsafe();
491 // __x can no longer be null
492 if (!__x->__is_black_ || __x == __root)
494 __x->__is_black_ = true;
497 // reset sibling, and it still can't be null
498 __w = __tree_is_left_child(__x) ?
499 __x->__parent_unsafe()->__right_ :
500 __x->__parent_->__left_;
503 else // __w has a red child
505 if (__w->__left_ == nullptr || __w->__left_->__is_black_)
507 // __w right child is non-null and red
508 __w->__right_->__is_black_ = true;
509 __w->__is_black_ = false;
510 __tree_left_rotate(__w);
511 // __w is known not to be root, so root hasn't changed
512 // reset sibling, and it still can't be null
513 __w = __w->__parent_unsafe();
515 // __w has a left red child, right child may be null
516 __w->__is_black_ = __w->__parent_unsafe()->__is_black_;
517 __w->__parent_unsafe()->__is_black_ = true;
518 __w->__left_->__is_black_ = true;
519 __tree_right_rotate(__w->__parent_unsafe());
531 #ifndef _LIBCPP_CXX03_LANG
533 struct __is_tree_value_type_imp : false_type {};
535 template <class _Key, class _Value>
536 struct __is_tree_value_type_imp<__value_type<_Key, _Value>> : true_type {};
538 template <class ..._Args>
539 struct __is_tree_value_type : false_type {};
541 template <class _One>
542 struct __is_tree_value_type<_One> : __is_tree_value_type_imp<typename __uncvref<_One>::type> {};
546 struct __tree_key_value_types {
547 typedef _Tp key_type;
548 typedef _Tp __node_value_type;
549 typedef _Tp __container_value_type;
550 static const bool __is_map = false;
552 _LIBCPP_INLINE_VISIBILITY
553 static key_type const& __get_key(_Tp const& __v) {
556 _LIBCPP_INLINE_VISIBILITY
557 static __container_value_type const& __get_value(__node_value_type const& __v) {
560 _LIBCPP_INLINE_VISIBILITY
561 static __container_value_type* __get_ptr(__node_value_type& __n) {
562 return _VSTD::addressof(__n);
565 #ifndef _LIBCPP_CXX03_LANG
566 _LIBCPP_INLINE_VISIBILITY
567 static __container_value_type&& __move(__node_value_type& __v) {
568 return _VSTD::move(__v);
573 template <class _Key, class _Tp>
574 struct __tree_key_value_types<__value_type<_Key, _Tp> > {
575 typedef _Key key_type;
576 typedef _Tp mapped_type;
577 typedef __value_type<_Key, _Tp> __node_value_type;
578 typedef pair<const _Key, _Tp> __container_value_type;
579 typedef pair<_Key, _Tp> __nc_value_type;
580 typedef __container_value_type __map_value_type;
581 static const bool __is_map = true;
583 _LIBCPP_INLINE_VISIBILITY
584 static key_type const&
585 __get_key(__node_value_type const& __t) {
586 return __t.__cc.first;
590 _LIBCPP_INLINE_VISIBILITY
591 static typename enable_if<__is_same_uncvref<_Up, __container_value_type>::value,
592 key_type const&>::type
593 __get_key(_Up& __t) {
597 _LIBCPP_INLINE_VISIBILITY
598 static __container_value_type const&
599 __get_value(__node_value_type const& __t) {
604 _LIBCPP_INLINE_VISIBILITY
605 static typename enable_if<__is_same_uncvref<_Up, __container_value_type>::value,
606 __container_value_type const&>::type
607 __get_value(_Up& __t) {
611 _LIBCPP_INLINE_VISIBILITY
612 static __container_value_type* __get_ptr(__node_value_type& __n) {
613 return _VSTD::addressof(__n.__cc);
616 #ifndef _LIBCPP_CXX03_LANG
617 _LIBCPP_INLINE_VISIBILITY
618 static __nc_value_type&& __move(__node_value_type& __v) {
619 return _VSTD::move(__v.__nc);
624 template <class _VoidPtr>
625 struct __tree_node_base_types {
626 typedef _VoidPtr __void_pointer;
628 typedef __tree_node_base<__void_pointer> __node_base_type;
629 typedef typename __rebind_pointer<_VoidPtr, __node_base_type>::type
632 typedef __tree_end_node<__node_base_pointer> __end_node_type;
633 typedef typename __rebind_pointer<_VoidPtr, __end_node_type>::type
635 #if defined(_LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB)
636 typedef __end_node_pointer __parent_pointer;
638 typedef typename conditional<
639 is_pointer<__end_node_pointer>::value,
641 __node_base_pointer>::type __parent_pointer;
645 static_assert((is_same<typename pointer_traits<_VoidPtr>::element_type, void>::value),
646 "_VoidPtr does not point to unqualified void type");
649 template <class _Tp, class _AllocPtr, class _KVTypes = __tree_key_value_types<_Tp>,
650 bool = _KVTypes::__is_map>
651 struct __tree_map_pointer_types {};
653 template <class _Tp, class _AllocPtr, class _KVTypes>
654 struct __tree_map_pointer_types<_Tp, _AllocPtr, _KVTypes, true> {
655 typedef typename _KVTypes::__map_value_type _Mv;
656 typedef typename __rebind_pointer<_AllocPtr, _Mv>::type
657 __map_value_type_pointer;
658 typedef typename __rebind_pointer<_AllocPtr, const _Mv>::type
659 __const_map_value_type_pointer;
662 template <class _NodePtr, class _NodeT = typename pointer_traits<_NodePtr>::element_type>
663 struct __tree_node_types;
665 template <class _NodePtr, class _Tp, class _VoidPtr>
666 struct __tree_node_types<_NodePtr, __tree_node<_Tp, _VoidPtr> >
667 : public __tree_node_base_types<_VoidPtr>,
668 __tree_key_value_types<_Tp>,
669 __tree_map_pointer_types<_Tp, _VoidPtr>
671 typedef __tree_node_base_types<_VoidPtr> __base;
672 typedef __tree_key_value_types<_Tp> __key_base;
673 typedef __tree_map_pointer_types<_Tp, _VoidPtr> __map_pointer_base;
676 typedef typename pointer_traits<_NodePtr>::element_type __node_type;
677 typedef _NodePtr __node_pointer;
679 typedef _Tp __node_value_type;
680 typedef typename __rebind_pointer<_VoidPtr, __node_value_type>::type
681 __node_value_type_pointer;
682 typedef typename __rebind_pointer<_VoidPtr, const __node_value_type>::type
683 __const_node_value_type_pointer;
684 #if defined(_LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB)
685 typedef typename __base::__end_node_pointer __iter_pointer;
687 typedef typename conditional<
688 is_pointer<__node_pointer>::value,
689 typename __base::__end_node_pointer,
690 __node_pointer>::type __iter_pointer;
693 static_assert(!is_const<__node_type>::value,
694 "_NodePtr should never be a pointer to const");
695 static_assert((is_same<typename __rebind_pointer<_VoidPtr, __node_type>::type,
696 _NodePtr>::value), "_VoidPtr does not rebind to _NodePtr.");
699 template <class _ValueTp, class _VoidPtr>
700 struct __make_tree_node_types {
701 typedef typename __rebind_pointer<_VoidPtr, __tree_node<_ValueTp, _VoidPtr> >::type
703 typedef __tree_node_types<_NodePtr> type;
708 template <class _Pointer>
709 class __tree_end_node
712 typedef _Pointer pointer;
715 _LIBCPP_INLINE_VISIBILITY
716 __tree_end_node() _NOEXCEPT : __left_() {}
719 template <class _VoidPtr>
720 class __tree_node_base
721 : public __tree_node_base_types<_VoidPtr>::__end_node_type
723 typedef __tree_node_base_types<_VoidPtr> _NodeBaseTypes;
726 typedef typename _NodeBaseTypes::__node_base_pointer pointer;
727 typedef typename _NodeBaseTypes::__parent_pointer __parent_pointer;
730 __parent_pointer __parent_;
733 _LIBCPP_INLINE_VISIBILITY
734 pointer __parent_unsafe() const { return static_cast<pointer>(__parent_);}
736 _LIBCPP_INLINE_VISIBILITY
737 void __set_parent(pointer __p) {
738 __parent_ = static_cast<__parent_pointer>(__p);
742 ~__tree_node_base() _LIBCPP_EQUAL_DELETE;
743 __tree_node_base(__tree_node_base const&) _LIBCPP_EQUAL_DELETE;
744 __tree_node_base& operator=(__tree_node_base const&) _LIBCPP_EQUAL_DELETE;
747 template <class _Tp, class _VoidPtr>
749 : public __tree_node_base<_VoidPtr>
752 typedef _Tp __node_value_type;
754 __node_value_type __value_;
757 ~__tree_node() _LIBCPP_EQUAL_DELETE;
758 __tree_node(__tree_node const&) _LIBCPP_EQUAL_DELETE;
759 __tree_node& operator=(__tree_node const&) _LIBCPP_EQUAL_DELETE;
763 template <class _Allocator>
764 class __tree_node_destructor
766 typedef _Allocator allocator_type;
767 typedef allocator_traits<allocator_type> __alloc_traits;
770 typedef typename __alloc_traits::pointer pointer;
772 typedef __tree_node_types<pointer> _NodeTypes;
773 allocator_type& __na_;
775 __tree_node_destructor& operator=(const __tree_node_destructor&);
778 bool __value_constructed;
780 _LIBCPP_INLINE_VISIBILITY
781 explicit __tree_node_destructor(allocator_type& __na, bool __val = false) _NOEXCEPT
783 __value_constructed(__val)
786 _LIBCPP_INLINE_VISIBILITY
787 void operator()(pointer __p) _NOEXCEPT
789 if (__value_constructed)
790 __alloc_traits::destroy(__na_, _NodeTypes::__get_ptr(__p->__value_));
792 __alloc_traits::deallocate(__na_, __p, 1);
795 template <class> friend class __map_node_destructor;
799 template <class _Tp, class _NodePtr, class _DiffType>
800 class _LIBCPP_TYPE_VIS_ONLY __tree_iterator
802 typedef __tree_node_types<_NodePtr> _NodeTypes;
803 typedef _NodePtr __node_pointer;
804 typedef typename _NodeTypes::__node_base_pointer __node_base_pointer;
805 typedef typename _NodeTypes::__end_node_pointer __end_node_pointer;
806 typedef typename _NodeTypes::__iter_pointer __iter_pointer;
807 typedef pointer_traits<__node_pointer> __pointer_traits;
809 __iter_pointer __ptr_;
812 typedef bidirectional_iterator_tag iterator_category;
813 typedef _Tp value_type;
814 typedef _DiffType difference_type;
815 typedef value_type& reference;
816 typedef typename _NodeTypes::__node_value_type_pointer pointer;
818 _LIBCPP_INLINE_VISIBILITY __tree_iterator() _NOEXCEPT
819 #if _LIBCPP_STD_VER > 11
824 _LIBCPP_INLINE_VISIBILITY reference operator*() const
825 {return __get_np()->__value_;}
826 _LIBCPP_INLINE_VISIBILITY pointer operator->() const
827 {return pointer_traits<pointer>::pointer_to(__get_np()->__value_);}
829 _LIBCPP_INLINE_VISIBILITY
830 __tree_iterator& operator++() {
831 __ptr_ = static_cast<__iter_pointer>(
832 __tree_next_iter<__end_node_pointer>(static_cast<__node_base_pointer>(__ptr_)));
835 _LIBCPP_INLINE_VISIBILITY
836 __tree_iterator operator++(int)
837 {__tree_iterator __t(*this); ++(*this); return __t;}
839 _LIBCPP_INLINE_VISIBILITY
840 __tree_iterator& operator--() {
841 __ptr_ = static_cast<__iter_pointer>(__tree_prev_iter<__node_base_pointer>(
842 static_cast<__end_node_pointer>(__ptr_)));
845 _LIBCPP_INLINE_VISIBILITY
846 __tree_iterator operator--(int)
847 {__tree_iterator __t(*this); --(*this); return __t;}
849 friend _LIBCPP_INLINE_VISIBILITY
850 bool operator==(const __tree_iterator& __x, const __tree_iterator& __y)
851 {return __x.__ptr_ == __y.__ptr_;}
852 friend _LIBCPP_INLINE_VISIBILITY
853 bool operator!=(const __tree_iterator& __x, const __tree_iterator& __y)
854 {return !(__x == __y);}
857 _LIBCPP_INLINE_VISIBILITY
858 explicit __tree_iterator(__node_pointer __p) _NOEXCEPT : __ptr_(__p) {}
859 _LIBCPP_INLINE_VISIBILITY
860 explicit __tree_iterator(__end_node_pointer __p) _NOEXCEPT : __ptr_(__p) {}
861 _LIBCPP_INLINE_VISIBILITY
862 __node_pointer __get_np() const { return static_cast<__node_pointer>(__ptr_); }
863 template <class, class, class> friend class __tree;
864 template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY __tree_const_iterator;
865 template <class> friend class _LIBCPP_TYPE_VIS_ONLY __map_iterator;
866 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
867 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
868 template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY set;
869 template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multiset;
872 template <class _Tp, class _NodePtr, class _DiffType>
873 class _LIBCPP_TYPE_VIS_ONLY __tree_const_iterator
875 typedef __tree_node_types<_NodePtr> _NodeTypes;
876 typedef typename _NodeTypes::__node_pointer __node_pointer;
877 typedef typename _NodeTypes::__node_base_pointer __node_base_pointer;
878 typedef typename _NodeTypes::__end_node_pointer __end_node_pointer;
879 typedef typename _NodeTypes::__iter_pointer __iter_pointer;
880 typedef pointer_traits<__node_pointer> __pointer_traits;
882 __iter_pointer __ptr_;
885 typedef bidirectional_iterator_tag iterator_category;
886 typedef _Tp value_type;
887 typedef _DiffType difference_type;
888 typedef const value_type& reference;
889 typedef typename _NodeTypes::__const_node_value_type_pointer pointer;
891 _LIBCPP_INLINE_VISIBILITY __tree_const_iterator() _NOEXCEPT
892 #if _LIBCPP_STD_VER > 11
898 typedef __tree_iterator<value_type, __node_pointer, difference_type>
899 __non_const_iterator;
901 _LIBCPP_INLINE_VISIBILITY
902 __tree_const_iterator(__non_const_iterator __p) _NOEXCEPT
903 : __ptr_(__p.__ptr_) {}
905 _LIBCPP_INLINE_VISIBILITY reference operator*() const
906 {return __get_np()->__value_;}
907 _LIBCPP_INLINE_VISIBILITY pointer operator->() const
908 {return pointer_traits<pointer>::pointer_to(__get_np()->__value_);}
910 _LIBCPP_INLINE_VISIBILITY
911 __tree_const_iterator& operator++() {
912 __ptr_ = static_cast<__iter_pointer>(
913 __tree_next_iter<__end_node_pointer>(static_cast<__node_base_pointer>(__ptr_)));
917 _LIBCPP_INLINE_VISIBILITY
918 __tree_const_iterator operator++(int)
919 {__tree_const_iterator __t(*this); ++(*this); return __t;}
921 _LIBCPP_INLINE_VISIBILITY
922 __tree_const_iterator& operator--() {
923 __ptr_ = static_cast<__iter_pointer>(__tree_prev_iter<__node_base_pointer>(
924 static_cast<__end_node_pointer>(__ptr_)));
928 _LIBCPP_INLINE_VISIBILITY
929 __tree_const_iterator operator--(int)
930 {__tree_const_iterator __t(*this); --(*this); return __t;}
932 friend _LIBCPP_INLINE_VISIBILITY
933 bool operator==(const __tree_const_iterator& __x, const __tree_const_iterator& __y)
934 {return __x.__ptr_ == __y.__ptr_;}
935 friend _LIBCPP_INLINE_VISIBILITY
936 bool operator!=(const __tree_const_iterator& __x, const __tree_const_iterator& __y)
937 {return !(__x == __y);}
940 _LIBCPP_INLINE_VISIBILITY
941 explicit __tree_const_iterator(__node_pointer __p) _NOEXCEPT
943 _LIBCPP_INLINE_VISIBILITY
944 explicit __tree_const_iterator(__end_node_pointer __p) _NOEXCEPT
946 _LIBCPP_INLINE_VISIBILITY
947 __node_pointer __get_np() const { return static_cast<__node_pointer>(__ptr_); }
949 template <class, class, class> friend class __tree;
950 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
951 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
952 template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY set;
953 template <class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multiset;
954 template <class> friend class _LIBCPP_TYPE_VIS_ONLY __map_const_iterator;
958 template <class _Tp, class _Compare, class _Allocator>
962 typedef _Tp value_type;
963 typedef _Compare value_compare;
964 typedef _Allocator allocator_type;
967 typedef allocator_traits<allocator_type> __alloc_traits;
968 typedef typename __make_tree_node_types<value_type,
969 typename __alloc_traits::void_pointer>::type
971 typedef typename _NodeTypes::key_type key_type;
973 typedef typename _NodeTypes::__node_value_type __node_value_type;
974 typedef typename _NodeTypes::__container_value_type __container_value_type;
976 typedef typename __alloc_traits::pointer pointer;
977 typedef typename __alloc_traits::const_pointer const_pointer;
978 typedef typename __alloc_traits::size_type size_type;
979 typedef typename __alloc_traits::difference_type difference_type;
982 typedef typename _NodeTypes::__void_pointer __void_pointer;
984 typedef typename _NodeTypes::__node_type __node;
985 typedef typename _NodeTypes::__node_pointer __node_pointer;
987 typedef typename _NodeTypes::__node_base_type __node_base;
988 typedef typename _NodeTypes::__node_base_pointer __node_base_pointer;
990 typedef typename _NodeTypes::__end_node_type __end_node_t;
991 typedef typename _NodeTypes::__end_node_pointer __end_node_ptr;
993 typedef typename _NodeTypes::__parent_pointer __parent_pointer;
994 typedef typename _NodeTypes::__iter_pointer __iter_pointer;
996 typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
997 typedef allocator_traits<__node_allocator> __node_traits;
1000 // check for sane allocator pointer rebinding semantics. Rebinding the
1001 // allocator for a new pointer type should be exactly the same as rebinding
1002 // the pointer using 'pointer_traits'.
1003 static_assert((is_same<__node_pointer, typename __node_traits::pointer>::value),
1004 "Allocator does not rebind pointers in a sane manner.");
1005 typedef typename __rebind_alloc_helper<__node_traits, __node_base>::type
1006 __node_base_allocator;
1007 typedef allocator_traits<__node_base_allocator> __node_base_traits;
1008 static_assert((is_same<__node_base_pointer, typename __node_base_traits::pointer>::value),
1009 "Allocator does not rebind pointers in a sane manner.");
1012 __iter_pointer __begin_node_;
1013 __compressed_pair<__end_node_t, __node_allocator> __pair1_;
1014 __compressed_pair<size_type, value_compare> __pair3_;
1017 _LIBCPP_INLINE_VISIBILITY
1018 __iter_pointer __end_node() _NOEXCEPT
1020 return static_cast<__iter_pointer>(
1021 pointer_traits<__end_node_ptr>::pointer_to(__pair1_.first())
1024 _LIBCPP_INLINE_VISIBILITY
1025 __iter_pointer __end_node() const _NOEXCEPT
1027 return static_cast<__iter_pointer>(
1028 pointer_traits<__end_node_ptr>::pointer_to(
1029 const_cast<__end_node_t&>(__pair1_.first())
1033 _LIBCPP_INLINE_VISIBILITY
1034 __node_allocator& __node_alloc() _NOEXCEPT {return __pair1_.second();}
1036 _LIBCPP_INLINE_VISIBILITY
1037 const __node_allocator& __node_alloc() const _NOEXCEPT
1038 {return __pair1_.second();}
1039 _LIBCPP_INLINE_VISIBILITY
1040 __iter_pointer& __begin_node() _NOEXCEPT {return __begin_node_;}
1041 _LIBCPP_INLINE_VISIBILITY
1042 const __iter_pointer& __begin_node() const _NOEXCEPT {return __begin_node_;}
1044 _LIBCPP_INLINE_VISIBILITY
1045 allocator_type __alloc() const _NOEXCEPT
1046 {return allocator_type(__node_alloc());}
1048 _LIBCPP_INLINE_VISIBILITY
1049 size_type& size() _NOEXCEPT {return __pair3_.first();}
1051 _LIBCPP_INLINE_VISIBILITY
1052 const size_type& size() const _NOEXCEPT {return __pair3_.first();}
1053 _LIBCPP_INLINE_VISIBILITY
1054 value_compare& value_comp() _NOEXCEPT {return __pair3_.second();}
1055 _LIBCPP_INLINE_VISIBILITY
1056 const value_compare& value_comp() const _NOEXCEPT
1057 {return __pair3_.second();}
1060 _LIBCPP_INLINE_VISIBILITY
1061 __node_pointer __root() const _NOEXCEPT
1062 {return static_cast<__node_pointer>(__end_node()->__left_);}
1064 __node_base_pointer* __root_ptr() const _NOEXCEPT {
1065 return _VSTD::addressof(__end_node()->__left_);
1068 typedef __tree_iterator<value_type, __node_pointer, difference_type> iterator;
1069 typedef __tree_const_iterator<value_type, __node_pointer, difference_type> const_iterator;
1071 explicit __tree(const value_compare& __comp)
1073 is_nothrow_default_constructible<__node_allocator>::value &&
1074 is_nothrow_copy_constructible<value_compare>::value);
1075 explicit __tree(const allocator_type& __a);
1076 __tree(const value_compare& __comp, const allocator_type& __a);
1077 __tree(const __tree& __t);
1078 __tree& operator=(const __tree& __t);
1079 template <class _InputIterator>
1080 void __assign_unique(_InputIterator __first, _InputIterator __last);
1081 template <class _InputIterator>
1082 void __assign_multi(_InputIterator __first, _InputIterator __last);
1083 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1084 __tree(__tree&& __t)
1086 is_nothrow_move_constructible<__node_allocator>::value &&
1087 is_nothrow_move_constructible<value_compare>::value);
1088 __tree(__tree&& __t, const allocator_type& __a);
1089 __tree& operator=(__tree&& __t)
1091 __node_traits::propagate_on_container_move_assignment::value &&
1092 is_nothrow_move_assignable<value_compare>::value &&
1093 is_nothrow_move_assignable<__node_allocator>::value);
1094 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1098 _LIBCPP_INLINE_VISIBILITY
1099 iterator begin() _NOEXCEPT {return iterator(__begin_node());}
1100 _LIBCPP_INLINE_VISIBILITY
1101 const_iterator begin() const _NOEXCEPT {return const_iterator(__begin_node());}
1102 _LIBCPP_INLINE_VISIBILITY
1103 iterator end() _NOEXCEPT {return iterator(__end_node());}
1104 _LIBCPP_INLINE_VISIBILITY
1105 const_iterator end() const _NOEXCEPT {return const_iterator(__end_node());}
1107 _LIBCPP_INLINE_VISIBILITY
1108 size_type max_size() const _NOEXCEPT
1109 {return std::min<size_type>(
1110 __node_traits::max_size(__node_alloc()),
1111 numeric_limits<difference_type >::max());}
1113 void clear() _NOEXCEPT;
1115 void swap(__tree& __t)
1116 #if _LIBCPP_STD_VER <= 11
1118 __is_nothrow_swappable<value_compare>::value
1119 && (!__node_traits::propagate_on_container_swap::value ||
1120 __is_nothrow_swappable<__node_allocator>::value)
1123 _NOEXCEPT_(__is_nothrow_swappable<value_compare>::value);
1126 #ifndef _LIBCPP_CXX03_LANG
1127 template <class _Key, class ..._Args>
1128 pair<iterator, bool>
1129 __emplace_unique_key_args(_Key const&, _Args&&... __args);
1130 template <class _Key, class ..._Args>
1132 __emplace_hint_unique_key_args(const_iterator, _Key const&, _Args&&...);
1134 template <class... _Args>
1135 pair<iterator, bool> __emplace_unique_impl(_Args&&... __args);
1137 template <class... _Args>
1138 iterator __emplace_hint_unique_impl(const_iterator __p, _Args&&... __args);
1140 template <class... _Args>
1141 iterator __emplace_multi(_Args&&... __args);
1143 template <class... _Args>
1144 iterator __emplace_hint_multi(const_iterator __p, _Args&&... __args);
1146 template <class _Pp>
1147 _LIBCPP_INLINE_VISIBILITY
1148 pair<iterator, bool> __emplace_unique(_Pp&& __x) {
1149 return __emplace_unique_extract_key(_VSTD::forward<_Pp>(__x),
1150 __can_extract_key<_Pp, key_type>());
1153 template <class _First, class _Second>
1154 _LIBCPP_INLINE_VISIBILITY
1156 __can_extract_map_key<_First, key_type, __container_value_type>::value,
1157 pair<iterator, bool>
1158 >::type __emplace_unique(_First&& __f, _Second&& __s) {
1159 return __emplace_unique_key_args(__f, _VSTD::forward<_First>(__f),
1160 _VSTD::forward<_Second>(__s));
1163 template <class... _Args>
1164 _LIBCPP_INLINE_VISIBILITY
1165 pair<iterator, bool> __emplace_unique(_Args&&... __args) {
1166 return __emplace_unique_impl(_VSTD::forward<_Args>(__args)...);
1169 template <class _Pp>
1170 _LIBCPP_INLINE_VISIBILITY
1171 pair<iterator, bool>
1172 __emplace_unique_extract_key(_Pp&& __x, __extract_key_fail_tag) {
1173 return __emplace_unique_impl(_VSTD::forward<_Pp>(__x));
1176 template <class _Pp>
1177 _LIBCPP_INLINE_VISIBILITY
1178 pair<iterator, bool>
1179 __emplace_unique_extract_key(_Pp&& __x, __extract_key_self_tag) {
1180 return __emplace_unique_key_args(__x, _VSTD::forward<_Pp>(__x));
1183 template <class _Pp>
1184 _LIBCPP_INLINE_VISIBILITY
1185 pair<iterator, bool>
1186 __emplace_unique_extract_key(_Pp&& __x, __extract_key_first_tag) {
1187 return __emplace_unique_key_args(__x.first, _VSTD::forward<_Pp>(__x));
1190 template <class _Pp>
1191 _LIBCPP_INLINE_VISIBILITY
1192 iterator __emplace_hint_unique(const_iterator __p, _Pp&& __x) {
1193 return __emplace_hint_unique_extract_key(__p, _VSTD::forward<_Pp>(__x),
1194 __can_extract_key<_Pp, key_type>());
1197 template <class _First, class _Second>
1198 _LIBCPP_INLINE_VISIBILITY
1200 __can_extract_map_key<_First, key_type, __container_value_type>::value,
1202 >::type __emplace_hint_unique(const_iterator __p, _First&& __f, _Second&& __s) {
1203 return __emplace_hint_unique_key_args(__p, __f,
1204 _VSTD::forward<_First>(__f),
1205 _VSTD::forward<_Second>(__s));
1208 template <class... _Args>
1209 _LIBCPP_INLINE_VISIBILITY
1210 iterator __emplace_hint_unique(const_iterator __p, _Args&&... __args) {
1211 return __emplace_hint_unique_impl(__p, _VSTD::forward<_Args>(__args)...);
1214 template <class _Pp>
1215 _LIBCPP_INLINE_VISIBILITY
1217 __emplace_hint_unique_extract_key(const_iterator __p, _Pp&& __x, __extract_key_fail_tag) {
1218 return __emplace_hint_unique_impl(__p, _VSTD::forward<_Pp>(__x));
1221 template <class _Pp>
1222 _LIBCPP_INLINE_VISIBILITY
1224 __emplace_hint_unique_extract_key(const_iterator __p, _Pp&& __x, __extract_key_self_tag) {
1225 return __emplace_hint_unique_key_args(__p, __x, _VSTD::forward<_Pp>(__x));
1228 template <class _Pp>
1229 _LIBCPP_INLINE_VISIBILITY
1231 __emplace_hint_unique_extract_key(const_iterator __p, _Pp&& __x, __extract_key_first_tag) {
1232 return __emplace_hint_unique_key_args(__p, __x.first, _VSTD::forward<_Pp>(__x));
1236 template <class _Key, class _Args>
1237 _LIBCPP_INLINE_VISIBILITY
1238 pair<iterator, bool> __emplace_unique_key_args(_Key const&, _Args& __args);
1239 template <class _Key, class _Args>
1240 _LIBCPP_INLINE_VISIBILITY
1241 iterator __emplace_hint_unique_key_args(const_iterator, _Key const&, _Args&);
1244 _LIBCPP_INLINE_VISIBILITY
1245 pair<iterator, bool> __insert_unique(const __container_value_type& __v) {
1246 return __emplace_unique_key_args(_NodeTypes::__get_key(__v), __v);
1249 _LIBCPP_INLINE_VISIBILITY
1250 iterator __insert_unique(const_iterator __p, const __container_value_type& __v) {
1251 return __emplace_hint_unique_key_args(__p, _NodeTypes::__get_key(__v), __v);
1254 #ifdef _LIBCPP_CXX03_LANG
1255 _LIBCPP_INLINE_VISIBILITY
1256 iterator __insert_multi(const __container_value_type& __v);
1257 _LIBCPP_INLINE_VISIBILITY
1258 iterator __insert_multi(const_iterator __p, const __container_value_type& __v);
1260 _LIBCPP_INLINE_VISIBILITY
1261 pair<iterator, bool> __insert_unique(__container_value_type&& __v) {
1262 return __emplace_unique_key_args(_NodeTypes::__get_key(__v), _VSTD::move(__v));
1265 _LIBCPP_INLINE_VISIBILITY
1266 iterator __insert_unique(const_iterator __p, __container_value_type&& __v) {
1267 return __emplace_hint_unique_key_args(__p, _NodeTypes::__get_key(__v), _VSTD::move(__v));
1270 template <class _Vp, class = typename enable_if<
1271 !is_same<typename __unconstref<_Vp>::type,
1272 __container_value_type
1275 _LIBCPP_INLINE_VISIBILITY
1276 pair<iterator, bool> __insert_unique(_Vp&& __v) {
1277 return __emplace_unique(_VSTD::forward<_Vp>(__v));
1280 template <class _Vp, class = typename enable_if<
1281 !is_same<typename __unconstref<_Vp>::type,
1282 __container_value_type
1285 _LIBCPP_INLINE_VISIBILITY
1286 iterator __insert_unique(const_iterator __p, _Vp&& __v) {
1287 return __emplace_hint_unique(__p, _VSTD::forward<_Vp>(__v));
1290 _LIBCPP_INLINE_VISIBILITY
1291 iterator __insert_multi(__container_value_type&& __v) {
1292 return __emplace_multi(_VSTD::move(__v));
1295 _LIBCPP_INLINE_VISIBILITY
1296 iterator __insert_multi(const_iterator __p, __container_value_type&& __v) {
1297 return __emplace_hint_multi(__p, _VSTD::move(__v));
1300 template <class _Vp>
1301 _LIBCPP_INLINE_VISIBILITY
1302 iterator __insert_multi(_Vp&& __v) {
1303 return __emplace_multi(_VSTD::forward<_Vp>(__v));
1306 template <class _Vp>
1307 _LIBCPP_INLINE_VISIBILITY
1308 iterator __insert_multi(const_iterator __p, _Vp&& __v) {
1309 return __emplace_hint_multi(__p, _VSTD::forward<_Vp>(__v));
1312 #endif // !_LIBCPP_CXX03_LANG
1314 pair<iterator, bool> __node_insert_unique(__node_pointer __nd);
1315 iterator __node_insert_unique(const_iterator __p,
1316 __node_pointer __nd);
1318 iterator __node_insert_multi(__node_pointer __nd);
1319 iterator __node_insert_multi(const_iterator __p, __node_pointer __nd);
1321 iterator erase(const_iterator __p);
1322 iterator erase(const_iterator __f, const_iterator __l);
1323 template <class _Key>
1324 size_type __erase_unique(const _Key& __k);
1325 template <class _Key>
1326 size_type __erase_multi(const _Key& __k);
1328 void __insert_node_at(__parent_pointer __parent,
1329 __node_base_pointer& __child,
1330 __node_base_pointer __new_node);
1332 template <class _Key>
1333 iterator find(const _Key& __v);
1334 template <class _Key>
1335 const_iterator find(const _Key& __v) const;
1337 template <class _Key>
1338 size_type __count_unique(const _Key& __k) const;
1339 template <class _Key>
1340 size_type __count_multi(const _Key& __k) const;
1342 template <class _Key>
1343 _LIBCPP_INLINE_VISIBILITY
1344 iterator lower_bound(const _Key& __v)
1345 {return __lower_bound(__v, __root(), __end_node());}
1346 template <class _Key>
1347 iterator __lower_bound(const _Key& __v,
1348 __node_pointer __root,
1349 __iter_pointer __result);
1350 template <class _Key>
1351 _LIBCPP_INLINE_VISIBILITY
1352 const_iterator lower_bound(const _Key& __v) const
1353 {return __lower_bound(__v, __root(), __end_node());}
1354 template <class _Key>
1355 const_iterator __lower_bound(const _Key& __v,
1356 __node_pointer __root,
1357 __iter_pointer __result) const;
1358 template <class _Key>
1359 _LIBCPP_INLINE_VISIBILITY
1360 iterator upper_bound(const _Key& __v)
1361 {return __upper_bound(__v, __root(), __end_node());}
1362 template <class _Key>
1363 iterator __upper_bound(const _Key& __v,
1364 __node_pointer __root,
1365 __iter_pointer __result);
1366 template <class _Key>
1367 _LIBCPP_INLINE_VISIBILITY
1368 const_iterator upper_bound(const _Key& __v) const
1369 {return __upper_bound(__v, __root(), __end_node());}
1370 template <class _Key>
1371 const_iterator __upper_bound(const _Key& __v,
1372 __node_pointer __root,
1373 __iter_pointer __result) const;
1374 template <class _Key>
1375 pair<iterator, iterator>
1376 __equal_range_unique(const _Key& __k);
1377 template <class _Key>
1378 pair<const_iterator, const_iterator>
1379 __equal_range_unique(const _Key& __k) const;
1381 template <class _Key>
1382 pair<iterator, iterator>
1383 __equal_range_multi(const _Key& __k);
1384 template <class _Key>
1385 pair<const_iterator, const_iterator>
1386 __equal_range_multi(const _Key& __k) const;
1388 typedef __tree_node_destructor<__node_allocator> _Dp;
1389 typedef unique_ptr<__node, _Dp> __node_holder;
1391 __node_holder remove(const_iterator __p) _NOEXCEPT;
1393 __node_base_pointer&
1394 __find_leaf_low(__parent_pointer& __parent, const key_type& __v);
1395 __node_base_pointer&
1396 __find_leaf_high(__parent_pointer& __parent, const key_type& __v);
1397 __node_base_pointer&
1398 __find_leaf(const_iterator __hint,
1399 __parent_pointer& __parent, const key_type& __v);
1400 template <class _Key>
1401 __node_base_pointer&
1402 __find_equal(__parent_pointer& __parent, const _Key& __v);
1403 template <class _Key>
1404 __node_base_pointer&
1405 __find_equal(const_iterator __hint, __parent_pointer& __parent,
1406 __node_base_pointer& __dummy,
1409 #ifndef _LIBCPP_CXX03_LANG
1410 template <class ..._Args>
1411 __node_holder __construct_node(_Args&& ...__args);
1413 __node_holder __construct_node(const __container_value_type& __v);
1416 void destroy(__node_pointer __nd) _NOEXCEPT;
1418 _LIBCPP_INLINE_VISIBILITY
1419 void __copy_assign_alloc(const __tree& __t)
1420 {__copy_assign_alloc(__t, integral_constant<bool,
1421 __node_traits::propagate_on_container_copy_assignment::value>());}
1423 _LIBCPP_INLINE_VISIBILITY
1424 void __copy_assign_alloc(const __tree& __t, true_type)
1426 if (__node_alloc() != __t.__node_alloc())
1428 __node_alloc() = __t.__node_alloc();
1430 _LIBCPP_INLINE_VISIBILITY
1431 void __copy_assign_alloc(const __tree&, false_type) {}
1433 void __move_assign(__tree& __t, false_type);
1434 void __move_assign(__tree& __t, true_type)
1435 _NOEXCEPT_(is_nothrow_move_assignable<value_compare>::value &&
1436 is_nothrow_move_assignable<__node_allocator>::value);
1438 _LIBCPP_INLINE_VISIBILITY
1439 void __move_assign_alloc(__tree& __t)
1441 !__node_traits::propagate_on_container_move_assignment::value ||
1442 is_nothrow_move_assignable<__node_allocator>::value)
1443 {__move_assign_alloc(__t, integral_constant<bool,
1444 __node_traits::propagate_on_container_move_assignment::value>());}
1446 _LIBCPP_INLINE_VISIBILITY
1447 void __move_assign_alloc(__tree& __t, true_type)
1448 _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)
1449 {__node_alloc() = _VSTD::move(__t.__node_alloc());}
1450 _LIBCPP_INLINE_VISIBILITY
1451 void __move_assign_alloc(__tree&, false_type) _NOEXCEPT {}
1453 __node_pointer __detach();
1454 static __node_pointer __detach(__node_pointer);
1456 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY map;
1457 template <class, class, class, class> friend class _LIBCPP_TYPE_VIS_ONLY multimap;
1460 template <class _Tp, class _Compare, class _Allocator>
1461 __tree<_Tp, _Compare, _Allocator>::__tree(const value_compare& __comp)
1463 is_nothrow_default_constructible<__node_allocator>::value &&
1464 is_nothrow_copy_constructible<value_compare>::value)
1465 : __pair3_(0, __comp)
1467 __begin_node() = __end_node();
1470 template <class _Tp, class _Compare, class _Allocator>
1471 __tree<_Tp, _Compare, _Allocator>::__tree(const allocator_type& __a)
1472 : __begin_node_(__iter_pointer()),
1473 __pair1_(__node_allocator(__a)),
1476 __begin_node() = __end_node();
1479 template <class _Tp, class _Compare, class _Allocator>
1480 __tree<_Tp, _Compare, _Allocator>::__tree(const value_compare& __comp,
1481 const allocator_type& __a)
1482 : __begin_node_(__iter_pointer()),
1483 __pair1_(__node_allocator(__a)),
1486 __begin_node() = __end_node();
1489 // Precondition: size() != 0
1490 template <class _Tp, class _Compare, class _Allocator>
1491 typename __tree<_Tp, _Compare, _Allocator>::__node_pointer
1492 __tree<_Tp, _Compare, _Allocator>::__detach()
1494 __node_pointer __cache = static_cast<__node_pointer>(__begin_node());
1495 __begin_node() = __end_node();
1496 __end_node()->__left_->__parent_ = nullptr;
1497 __end_node()->__left_ = nullptr;
1499 // __cache->__left_ == nullptr
1500 if (__cache->__right_ != nullptr)
1501 __cache = static_cast<__node_pointer>(__cache->__right_);
1502 // __cache->__left_ == nullptr
1503 // __cache->__right_ == nullptr
1507 // Precondition: __cache != nullptr
1508 // __cache->left_ == nullptr
1509 // __cache->right_ == nullptr
1510 // This is no longer a red-black tree
1511 template <class _Tp, class _Compare, class _Allocator>
1512 typename __tree<_Tp, _Compare, _Allocator>::__node_pointer
1513 __tree<_Tp, _Compare, _Allocator>::__detach(__node_pointer __cache)
1515 if (__cache->__parent_ == nullptr)
1517 if (__tree_is_left_child(static_cast<__node_base_pointer>(__cache)))
1519 __cache->__parent_->__left_ = nullptr;
1520 __cache = static_cast<__node_pointer>(__cache->__parent_);
1521 if (__cache->__right_ == nullptr)
1523 return static_cast<__node_pointer>(__tree_leaf(__cache->__right_));
1525 // __cache is right child
1526 __cache->__parent_unsafe()->__right_ = nullptr;
1527 __cache = static_cast<__node_pointer>(__cache->__parent_);
1528 if (__cache->__left_ == nullptr)
1530 return static_cast<__node_pointer>(__tree_leaf(__cache->__left_));
1533 template <class _Tp, class _Compare, class _Allocator>
1534 __tree<_Tp, _Compare, _Allocator>&
1535 __tree<_Tp, _Compare, _Allocator>::operator=(const __tree& __t)
1539 value_comp() = __t.value_comp();
1540 __copy_assign_alloc(__t);
1541 __assign_multi(__t.begin(), __t.end());
1546 template <class _Tp, class _Compare, class _Allocator>
1547 template <class _InputIterator>
1549 __tree<_Tp, _Compare, _Allocator>::__assign_unique(_InputIterator __first, _InputIterator __last)
1551 typedef iterator_traits<_InputIterator> _ITraits;
1552 typedef typename _ITraits::value_type _ItValueType;
1553 static_assert((is_same<_ItValueType, __container_value_type>::value),
1554 "__assign_unique may only be called with the containers value type");
1558 __node_pointer __cache = __detach();
1559 #ifndef _LIBCPP_NO_EXCEPTIONS
1562 #endif // _LIBCPP_NO_EXCEPTIONS
1563 for (; __cache != nullptr && __first != __last; ++__first)
1565 __cache->__value_ = *__first;
1566 __node_pointer __next = __detach(__cache);
1567 __node_insert_unique(__cache);
1570 #ifndef _LIBCPP_NO_EXCEPTIONS
1574 while (__cache->__parent_ != nullptr)
1575 __cache = static_cast<__node_pointer>(__cache->__parent_);
1579 #endif // _LIBCPP_NO_EXCEPTIONS
1580 if (__cache != nullptr)
1582 while (__cache->__parent_ != nullptr)
1583 __cache = static_cast<__node_pointer>(__cache->__parent_);
1587 for (; __first != __last; ++__first)
1588 __insert_unique(*__first);
1591 template <class _Tp, class _Compare, class _Allocator>
1592 template <class _InputIterator>
1594 __tree<_Tp, _Compare, _Allocator>::__assign_multi(_InputIterator __first, _InputIterator __last)
1596 typedef iterator_traits<_InputIterator> _ITraits;
1597 typedef typename _ITraits::value_type _ItValueType;
1598 static_assert((is_same<_ItValueType, __container_value_type>::value ||
1599 is_same<_ItValueType, __node_value_type>::value),
1600 "__assign_multi may only be called with the containers value type"
1601 " or the nodes value type");
1604 __node_pointer __cache = __detach();
1605 #ifndef _LIBCPP_NO_EXCEPTIONS
1608 #endif // _LIBCPP_NO_EXCEPTIONS
1609 for (; __cache != nullptr && __first != __last; ++__first)
1611 __cache->__value_ = *__first;
1612 __node_pointer __next = __detach(__cache);
1613 __node_insert_multi(__cache);
1616 #ifndef _LIBCPP_NO_EXCEPTIONS
1620 while (__cache->__parent_ != nullptr)
1621 __cache = static_cast<__node_pointer>(__cache->__parent_);
1625 #endif // _LIBCPP_NO_EXCEPTIONS
1626 if (__cache != nullptr)
1628 while (__cache->__parent_ != nullptr)
1629 __cache = static_cast<__node_pointer>(__cache->__parent_);
1633 for (; __first != __last; ++__first)
1634 __insert_multi(_NodeTypes::__get_value(*__first));
1637 template <class _Tp, class _Compare, class _Allocator>
1638 __tree<_Tp, _Compare, _Allocator>::__tree(const __tree& __t)
1639 : __begin_node_(__iter_pointer()),
1640 __pair1_(__node_traits::select_on_container_copy_construction(__t.__node_alloc())),
1641 __pair3_(0, __t.value_comp())
1643 __begin_node() = __end_node();
1646 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1648 template <class _Tp, class _Compare, class _Allocator>
1649 __tree<_Tp, _Compare, _Allocator>::__tree(__tree&& __t)
1651 is_nothrow_move_constructible<__node_allocator>::value &&
1652 is_nothrow_move_constructible<value_compare>::value)
1653 : __begin_node_(_VSTD::move(__t.__begin_node_)),
1654 __pair1_(_VSTD::move(__t.__pair1_)),
1655 __pair3_(_VSTD::move(__t.__pair3_))
1658 __begin_node() = __end_node();
1661 __end_node()->__left_->__parent_ = static_cast<__parent_pointer>(__end_node());
1662 __t.__begin_node() = __t.__end_node();
1663 __t.__end_node()->__left_ = nullptr;
1668 template <class _Tp, class _Compare, class _Allocator>
1669 __tree<_Tp, _Compare, _Allocator>::__tree(__tree&& __t, const allocator_type& __a)
1670 : __pair1_(__node_allocator(__a)),
1671 __pair3_(0, _VSTD::move(__t.value_comp()))
1673 if (__a == __t.__alloc())
1675 if (__t.size() == 0)
1676 __begin_node() = __end_node();
1679 __begin_node() = __t.__begin_node();
1680 __end_node()->__left_ = __t.__end_node()->__left_;
1681 __end_node()->__left_->__parent_ = static_cast<__parent_pointer>(__end_node());
1682 size() = __t.size();
1683 __t.__begin_node() = __t.__end_node();
1684 __t.__end_node()->__left_ = nullptr;
1690 __begin_node() = __end_node();
1694 template <class _Tp, class _Compare, class _Allocator>
1696 __tree<_Tp, _Compare, _Allocator>::__move_assign(__tree& __t, true_type)
1697 _NOEXCEPT_(is_nothrow_move_assignable<value_compare>::value &&
1698 is_nothrow_move_assignable<__node_allocator>::value)
1700 destroy(static_cast<__node_pointer>(__end_node()->__left_));
1701 __begin_node_ = __t.__begin_node_;
1702 __pair1_.first() = __t.__pair1_.first();
1703 __move_assign_alloc(__t);
1704 __pair3_ = _VSTD::move(__t.__pair3_);
1706 __begin_node() = __end_node();
1709 __end_node()->__left_->__parent_ = static_cast<__parent_pointer>(__end_node());
1710 __t.__begin_node() = __t.__end_node();
1711 __t.__end_node()->__left_ = nullptr;
1716 template <class _Tp, class _Compare, class _Allocator>
1718 __tree<_Tp, _Compare, _Allocator>::__move_assign(__tree& __t, false_type)
1720 if (__node_alloc() == __t.__node_alloc())
1721 __move_assign(__t, true_type());
1724 value_comp() = _VSTD::move(__t.value_comp());
1725 const_iterator __e = end();
1728 __node_pointer __cache = __detach();
1729 #ifndef _LIBCPP_NO_EXCEPTIONS
1732 #endif // _LIBCPP_NO_EXCEPTIONS
1733 while (__cache != nullptr && __t.size() != 0)
1735 __cache->__value_ = _VSTD::move(__t.remove(__t.begin())->__value_);
1736 __node_pointer __next = __detach(__cache);
1737 __node_insert_multi(__cache);
1740 #ifndef _LIBCPP_NO_EXCEPTIONS
1744 while (__cache->__parent_ != nullptr)
1745 __cache = static_cast<__node_pointer>(__cache->__parent_);
1749 #endif // _LIBCPP_NO_EXCEPTIONS
1750 if (__cache != nullptr)
1752 while (__cache->__parent_ != nullptr)
1753 __cache = static_cast<__node_pointer>(__cache->__parent_);
1757 while (__t.size() != 0)
1758 __insert_multi(__e, _NodeTypes::__move(__t.remove(__t.begin())->__value_));
1762 template <class _Tp, class _Compare, class _Allocator>
1763 __tree<_Tp, _Compare, _Allocator>&
1764 __tree<_Tp, _Compare, _Allocator>::operator=(__tree&& __t)
1766 __node_traits::propagate_on_container_move_assignment::value &&
1767 is_nothrow_move_assignable<value_compare>::value &&
1768 is_nothrow_move_assignable<__node_allocator>::value)
1771 __move_assign(__t, integral_constant<bool,
1772 __node_traits::propagate_on_container_move_assignment::value>());
1776 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
1778 template <class _Tp, class _Compare, class _Allocator>
1779 __tree<_Tp, _Compare, _Allocator>::~__tree()
1781 static_assert((is_copy_constructible<value_compare>::value),
1782 "Comparator must be copy-constructible.");
1786 template <class _Tp, class _Compare, class _Allocator>
1788 __tree<_Tp, _Compare, _Allocator>::destroy(__node_pointer __nd) _NOEXCEPT
1790 if (__nd != nullptr)
1792 destroy(static_cast<__node_pointer>(__nd->__left_));
1793 destroy(static_cast<__node_pointer>(__nd->__right_));
1794 __node_allocator& __na = __node_alloc();
1795 __node_traits::destroy(__na, _NodeTypes::__get_ptr(__nd->__value_));
1796 __node_traits::deallocate(__na, __nd, 1);
1800 template <class _Tp, class _Compare, class _Allocator>
1802 __tree<_Tp, _Compare, _Allocator>::swap(__tree& __t)
1803 #if _LIBCPP_STD_VER <= 11
1805 __is_nothrow_swappable<value_compare>::value
1806 && (!__node_traits::propagate_on_container_swap::value ||
1807 __is_nothrow_swappable<__node_allocator>::value)
1810 _NOEXCEPT_(__is_nothrow_swappable<value_compare>::value)
1814 swap(__begin_node_, __t.__begin_node_);
1815 swap(__pair1_.first(), __t.__pair1_.first());
1816 __swap_allocator(__node_alloc(), __t.__node_alloc());
1817 __pair3_.swap(__t.__pair3_);
1819 __begin_node() = __end_node();
1821 __end_node()->__left_->__parent_ = static_cast<__parent_pointer>(__end_node());
1822 if (__t.size() == 0)
1823 __t.__begin_node() = __t.__end_node();
1825 __t.__end_node()->__left_->__parent_ = static_cast<__parent_pointer>(__t.__end_node());
1828 template <class _Tp, class _Compare, class _Allocator>
1830 __tree<_Tp, _Compare, _Allocator>::clear() _NOEXCEPT
1834 __begin_node() = __end_node();
1835 __end_node()->__left_ = nullptr;
1838 // Find lower_bound place to insert
1839 // Set __parent to parent of null leaf
1840 // Return reference to null leaf
1841 template <class _Tp, class _Compare, class _Allocator>
1842 typename __tree<_Tp, _Compare, _Allocator>::__node_base_pointer&
1843 __tree<_Tp, _Compare, _Allocator>::__find_leaf_low(__parent_pointer& __parent,
1844 const key_type& __v)
1846 __node_pointer __nd = __root();
1847 if (__nd != nullptr)
1851 if (value_comp()(__nd->__value_, __v))
1853 if (__nd->__right_ != nullptr)
1854 __nd = static_cast<__node_pointer>(__nd->__right_);
1857 __parent = static_cast<__parent_pointer>(__nd);
1858 return __nd->__right_;
1863 if (__nd->__left_ != nullptr)
1864 __nd = static_cast<__node_pointer>(__nd->__left_);
1867 __parent = static_cast<__parent_pointer>(__nd);
1868 return __parent->__left_;
1873 __parent = static_cast<__parent_pointer>(__end_node());
1874 return __parent->__left_;
1877 // Find upper_bound place to insert
1878 // Set __parent to parent of null leaf
1879 // Return reference to null leaf
1880 template <class _Tp, class _Compare, class _Allocator>
1881 typename __tree<_Tp, _Compare, _Allocator>::__node_base_pointer&
1882 __tree<_Tp, _Compare, _Allocator>::__find_leaf_high(__parent_pointer& __parent,
1883 const key_type& __v)
1885 __node_pointer __nd = __root();
1886 if (__nd != nullptr)
1890 if (value_comp()(__v, __nd->__value_))
1892 if (__nd->__left_ != nullptr)
1893 __nd = static_cast<__node_pointer>(__nd->__left_);
1896 __parent = static_cast<__parent_pointer>(__nd);
1897 return __parent->__left_;
1902 if (__nd->__right_ != nullptr)
1903 __nd = static_cast<__node_pointer>(__nd->__right_);
1906 __parent = static_cast<__parent_pointer>(__nd);
1907 return __nd->__right_;
1912 __parent = static_cast<__parent_pointer>(__end_node());
1913 return __parent->__left_;
1916 // Find leaf place to insert closest to __hint
1917 // First check prior to __hint.
1918 // Next check after __hint.
1919 // Next do O(log N) search.
1920 // Set __parent to parent of null leaf
1921 // Return reference to null leaf
1922 template <class _Tp, class _Compare, class _Allocator>
1923 typename __tree<_Tp, _Compare, _Allocator>::__node_base_pointer&
1924 __tree<_Tp, _Compare, _Allocator>::__find_leaf(const_iterator __hint,
1925 __parent_pointer& __parent,
1926 const key_type& __v)
1928 if (__hint == end() || !value_comp()(*__hint, __v)) // check before
1931 const_iterator __prior = __hint;
1932 if (__prior == begin() || !value_comp()(__v, *--__prior))
1934 // *prev(__hint) <= __v <= *__hint
1935 if (__hint.__ptr_->__left_ == nullptr)
1937 __parent = static_cast<__parent_pointer>(__hint.__ptr_);
1938 return __parent->__left_;
1942 __parent = static_cast<__parent_pointer>(__prior.__ptr_);
1943 return static_cast<__node_base_pointer>(__prior.__ptr_)->__right_;
1946 // __v < *prev(__hint)
1947 return __find_leaf_high(__parent, __v);
1949 // else __v > *__hint
1950 return __find_leaf_low(__parent, __v);
1953 // Find place to insert if __v doesn't exist
1954 // Set __parent to parent of null leaf
1955 // Return reference to null leaf
1956 // If __v exists, set parent to node of __v and return reference to node of __v
1957 template <class _Tp, class _Compare, class _Allocator>
1958 template <class _Key>
1959 typename __tree<_Tp, _Compare, _Allocator>::__node_base_pointer&
1960 __tree<_Tp, _Compare, _Allocator>::__find_equal(__parent_pointer& __parent,
1963 __node_pointer __nd = __root();
1964 __node_base_pointer* __nd_ptr = __root_ptr();
1965 if (__nd != nullptr)
1969 if (value_comp()(__v, __nd->__value_))
1971 if (__nd->__left_ != nullptr) {
1972 __nd_ptr = _VSTD::addressof(__nd->__left_);
1973 __nd = static_cast<__node_pointer>(__nd->__left_);
1975 __parent = static_cast<__parent_pointer>(__nd);
1976 return __parent->__left_;
1979 else if (value_comp()(__nd->__value_, __v))
1981 if (__nd->__right_ != nullptr) {
1982 __nd_ptr = _VSTD::addressof(__nd->__right_);
1983 __nd = static_cast<__node_pointer>(__nd->__right_);
1985 __parent = static_cast<__parent_pointer>(__nd);
1986 return __nd->__right_;
1991 __parent = static_cast<__parent_pointer>(__nd);
1996 __parent = static_cast<__parent_pointer>(__end_node());
1997 return __parent->__left_;
2000 // Find place to insert if __v doesn't exist
2001 // First check prior to __hint.
2002 // Next check after __hint.
2003 // Next do O(log N) search.
2004 // Set __parent to parent of null leaf
2005 // Return reference to null leaf
2006 // If __v exists, set parent to node of __v and return reference to node of __v
2007 template <class _Tp, class _Compare, class _Allocator>
2008 template <class _Key>
2009 typename __tree<_Tp, _Compare, _Allocator>::__node_base_pointer&
2010 __tree<_Tp, _Compare, _Allocator>::__find_equal(const_iterator __hint,
2011 __parent_pointer& __parent,
2012 __node_base_pointer& __dummy,
2015 if (__hint == end() || value_comp()(__v, *__hint)) // check before
2018 const_iterator __prior = __hint;
2019 if (__prior == begin() || value_comp()(*--__prior, __v))
2021 // *prev(__hint) < __v < *__hint
2022 if (__hint.__ptr_->__left_ == nullptr)
2024 __parent = static_cast<__parent_pointer>(__hint.__ptr_);
2025 return __parent->__left_;
2029 __parent = static_cast<__parent_pointer>(__prior.__ptr_);
2030 return static_cast<__node_base_pointer>(__prior.__ptr_)->__right_;
2033 // __v <= *prev(__hint)
2034 return __find_equal(__parent, __v);
2036 else if (value_comp()(*__hint, __v)) // check after
2039 const_iterator __next = _VSTD::next(__hint);
2040 if (__next == end() || value_comp()(__v, *__next))
2042 // *__hint < __v < *_VSTD::next(__hint)
2043 if (__hint.__get_np()->__right_ == nullptr)
2045 __parent = static_cast<__parent_pointer>(__hint.__ptr_);
2046 return static_cast<__node_base_pointer>(__hint.__ptr_)->__right_;
2050 __parent = static_cast<__parent_pointer>(__next.__ptr_);
2051 return __parent->__left_;
2054 // *next(__hint) <= __v
2055 return __find_equal(__parent, __v);
2057 // else __v == *__hint
2058 __parent = static_cast<__parent_pointer>(__hint.__ptr_);
2059 __dummy = static_cast<__node_base_pointer>(__hint.__ptr_);
2063 template <class _Tp, class _Compare, class _Allocator>
2065 __tree<_Tp, _Compare, _Allocator>::__insert_node_at(__parent_pointer __parent,
2066 __node_base_pointer& __child,
2067 __node_base_pointer __new_node)
2069 __new_node->__left_ = nullptr;
2070 __new_node->__right_ = nullptr;
2071 __new_node->__parent_ = __parent;
2072 // __new_node->__is_black_ is initialized in __tree_balance_after_insert
2073 __child = __new_node;
2074 if (__begin_node()->__left_ != nullptr)
2075 __begin_node() = static_cast<__iter_pointer>(__begin_node()->__left_);
2076 __tree_balance_after_insert(__end_node()->__left_, __child);
2080 #ifndef _LIBCPP_CXX03_LANG
2081 template <class _Tp, class _Compare, class _Allocator>
2082 template <class _Key, class... _Args>
2083 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator, bool>
2084 __tree<_Tp, _Compare, _Allocator>::__emplace_unique_key_args(_Key const& __k, _Args&&... __args)
2086 template <class _Tp, class _Compare, class _Allocator>
2087 template <class _Key, class _Args>
2088 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator, bool>
2089 __tree<_Tp, _Compare, _Allocator>::__emplace_unique_key_args(_Key const& __k, _Args& __args)
2092 __parent_pointer __parent;
2093 __node_base_pointer& __child = __find_equal(__parent, __k);
2094 __node_pointer __r = static_cast<__node_pointer>(__child);
2095 bool __inserted = false;
2096 if (__child == nullptr)
2098 #ifndef _LIBCPP_CXX03_LANG
2099 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2101 __node_holder __h = __construct_node(__args);
2103 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2104 __r = __h.release();
2107 return pair<iterator, bool>(iterator(__r), __inserted);
2111 #ifndef _LIBCPP_CXX03_LANG
2112 template <class _Tp, class _Compare, class _Allocator>
2113 template <class _Key, class... _Args>
2114 typename __tree<_Tp, _Compare, _Allocator>::iterator
2115 __tree<_Tp, _Compare, _Allocator>::__emplace_hint_unique_key_args(
2116 const_iterator __p, _Key const& __k, _Args&&... __args)
2118 template <class _Tp, class _Compare, class _Allocator>
2119 template <class _Key, class _Args>
2120 typename __tree<_Tp, _Compare, _Allocator>::iterator
2121 __tree<_Tp, _Compare, _Allocator>::__emplace_hint_unique_key_args(
2122 const_iterator __p, _Key const& __k, _Args& __args)
2125 __parent_pointer __parent;
2126 __node_base_pointer __dummy;
2127 __node_base_pointer& __child = __find_equal(__p, __parent, __dummy, __k);
2128 __node_pointer __r = static_cast<__node_pointer>(__child);
2129 if (__child == nullptr)
2131 #ifndef _LIBCPP_CXX03_LANG
2132 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2134 __node_holder __h = __construct_node(__args);
2136 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2137 __r = __h.release();
2139 return iterator(__r);
2143 #ifndef _LIBCPP_CXX03_LANG
2145 template <class _Tp, class _Compare, class _Allocator>
2146 template <class ..._Args>
2147 typename __tree<_Tp, _Compare, _Allocator>::__node_holder
2148 __tree<_Tp, _Compare, _Allocator>::__construct_node(_Args&& ...__args)
2150 static_assert(!__is_tree_value_type<_Args...>::value,
2151 "Cannot construct from __value_type");
2152 __node_allocator& __na = __node_alloc();
2153 __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
2154 __node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), _VSTD::forward<_Args>(__args)...);
2155 __h.get_deleter().__value_constructed = true;
2160 template <class _Tp, class _Compare, class _Allocator>
2161 template <class... _Args>
2162 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator, bool>
2163 __tree<_Tp, _Compare, _Allocator>::__emplace_unique_impl(_Args&&... __args)
2165 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2166 __parent_pointer __parent;
2167 __node_base_pointer& __child = __find_equal(__parent, __h->__value_);
2168 __node_pointer __r = static_cast<__node_pointer>(__child);
2169 bool __inserted = false;
2170 if (__child == nullptr)
2172 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2173 __r = __h.release();
2176 return pair<iterator, bool>(iterator(__r), __inserted);
2179 template <class _Tp, class _Compare, class _Allocator>
2180 template <class... _Args>
2181 typename __tree<_Tp, _Compare, _Allocator>::iterator
2182 __tree<_Tp, _Compare, _Allocator>::__emplace_hint_unique_impl(const_iterator __p, _Args&&... __args)
2184 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2185 __parent_pointer __parent;
2186 __node_base_pointer __dummy;
2187 __node_base_pointer& __child = __find_equal(__p, __parent, __dummy, __h->__value_);
2188 __node_pointer __r = static_cast<__node_pointer>(__child);
2189 if (__child == nullptr)
2191 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2192 __r = __h.release();
2194 return iterator(__r);
2197 template <class _Tp, class _Compare, class _Allocator>
2198 template <class... _Args>
2199 typename __tree<_Tp, _Compare, _Allocator>::iterator
2200 __tree<_Tp, _Compare, _Allocator>::__emplace_multi(_Args&&... __args)
2202 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2203 __parent_pointer __parent;
2204 __node_base_pointer& __child = __find_leaf_high(__parent, _NodeTypes::__get_key(__h->__value_));
2205 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2206 return iterator(static_cast<__node_pointer>(__h.release()));
2209 template <class _Tp, class _Compare, class _Allocator>
2210 template <class... _Args>
2211 typename __tree<_Tp, _Compare, _Allocator>::iterator
2212 __tree<_Tp, _Compare, _Allocator>::__emplace_hint_multi(const_iterator __p,
2215 __node_holder __h = __construct_node(_VSTD::forward<_Args>(__args)...);
2216 __parent_pointer __parent;
2217 __node_base_pointer& __child = __find_leaf(__p, __parent, _NodeTypes::__get_key(__h->__value_));
2218 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2219 return iterator(static_cast<__node_pointer>(__h.release()));
2223 #else // _LIBCPP_CXX03_LANG
2225 template <class _Tp, class _Compare, class _Allocator>
2226 typename __tree<_Tp, _Compare, _Allocator>::__node_holder
2227 __tree<_Tp, _Compare, _Allocator>::__construct_node(const __container_value_type& __v)
2229 __node_allocator& __na = __node_alloc();
2230 __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
2231 __node_traits::construct(__na, _NodeTypes::__get_ptr(__h->__value_), __v);
2232 __h.get_deleter().__value_constructed = true;
2233 return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
2236 #endif // _LIBCPP_CXX03_LANG
2238 #ifdef _LIBCPP_CXX03_LANG
2239 template <class _Tp, class _Compare, class _Allocator>
2240 typename __tree<_Tp, _Compare, _Allocator>::iterator
2241 __tree<_Tp, _Compare, _Allocator>::__insert_multi(const __container_value_type& __v)
2243 __parent_pointer __parent;
2244 __node_base_pointer& __child = __find_leaf_high(__parent, _NodeTypes::__get_key(__v));
2245 __node_holder __h = __construct_node(__v);
2246 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2247 return iterator(__h.release());
2250 template <class _Tp, class _Compare, class _Allocator>
2251 typename __tree<_Tp, _Compare, _Allocator>::iterator
2252 __tree<_Tp, _Compare, _Allocator>::__insert_multi(const_iterator __p, const __container_value_type& __v)
2254 __parent_pointer __parent;
2255 __node_base_pointer& __child = __find_leaf(__p, __parent, _NodeTypes::__get_key(__v));
2256 __node_holder __h = __construct_node(__v);
2257 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get()));
2258 return iterator(__h.release());
2262 template <class _Tp, class _Compare, class _Allocator>
2263 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator, bool>
2264 __tree<_Tp, _Compare, _Allocator>::__node_insert_unique(__node_pointer __nd)
2266 __parent_pointer __parent;
2267 __node_base_pointer& __child = __find_equal(__parent, __nd->__value_);
2268 __node_pointer __r = static_cast<__node_pointer>(__child);
2269 bool __inserted = false;
2270 if (__child == nullptr)
2272 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__nd));
2276 return pair<iterator, bool>(iterator(__r), __inserted);
2279 template <class _Tp, class _Compare, class _Allocator>
2280 typename __tree<_Tp, _Compare, _Allocator>::iterator
2281 __tree<_Tp, _Compare, _Allocator>::__node_insert_unique(const_iterator __p,
2282 __node_pointer __nd)
2284 __parent_pointer __parent;
2285 __node_base_pointer __dummy;
2286 __node_base_pointer& __child = __find_equal(__p, __parent, __nd->__value_);
2287 __node_pointer __r = static_cast<__node_pointer>(__child);
2288 if (__child == nullptr)
2290 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__nd));
2293 return iterator(__r);
2296 template <class _Tp, class _Compare, class _Allocator>
2297 typename __tree<_Tp, _Compare, _Allocator>::iterator
2298 __tree<_Tp, _Compare, _Allocator>::__node_insert_multi(__node_pointer __nd)
2300 __parent_pointer __parent;
2301 __node_base_pointer& __child = __find_leaf_high(__parent, _NodeTypes::__get_key(__nd->__value_));
2302 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__nd));
2303 return iterator(__nd);
2306 template <class _Tp, class _Compare, class _Allocator>
2307 typename __tree<_Tp, _Compare, _Allocator>::iterator
2308 __tree<_Tp, _Compare, _Allocator>::__node_insert_multi(const_iterator __p,
2309 __node_pointer __nd)
2311 __parent_pointer __parent;
2312 __node_base_pointer& __child = __find_leaf(__p, __parent, _NodeTypes::__get_key(__nd->__value_));
2313 __insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__nd));
2314 return iterator(__nd);
2317 template <class _Tp, class _Compare, class _Allocator>
2318 typename __tree<_Tp, _Compare, _Allocator>::iterator
2319 __tree<_Tp, _Compare, _Allocator>::erase(const_iterator __p)
2321 __node_pointer __np = __p.__get_np();
2322 iterator __r(__p.__ptr_);
2324 if (__begin_node() == __p.__ptr_)
2325 __begin_node() = __r.__ptr_;
2327 __node_allocator& __na = __node_alloc();
2328 __tree_remove(__end_node()->__left_,
2329 static_cast<__node_base_pointer>(__np));
2330 __node_traits::destroy(__na, _NodeTypes::__get_ptr(
2331 const_cast<__node_value_type&>(*__p)));
2332 __node_traits::deallocate(__na, __np, 1);
2336 template <class _Tp, class _Compare, class _Allocator>
2337 typename __tree<_Tp, _Compare, _Allocator>::iterator
2338 __tree<_Tp, _Compare, _Allocator>::erase(const_iterator __f, const_iterator __l)
2342 return iterator(__l.__ptr_);
2345 template <class _Tp, class _Compare, class _Allocator>
2346 template <class _Key>
2347 typename __tree<_Tp, _Compare, _Allocator>::size_type
2348 __tree<_Tp, _Compare, _Allocator>::__erase_unique(const _Key& __k)
2350 iterator __i = find(__k);
2357 template <class _Tp, class _Compare, class _Allocator>
2358 template <class _Key>
2359 typename __tree<_Tp, _Compare, _Allocator>::size_type
2360 __tree<_Tp, _Compare, _Allocator>::__erase_multi(const _Key& __k)
2362 pair<iterator, iterator> __p = __equal_range_multi(__k);
2364 for (; __p.first != __p.second; ++__r)
2365 __p.first = erase(__p.first);
2369 template <class _Tp, class _Compare, class _Allocator>
2370 template <class _Key>
2371 typename __tree<_Tp, _Compare, _Allocator>::iterator
2372 __tree<_Tp, _Compare, _Allocator>::find(const _Key& __v)
2374 iterator __p = __lower_bound(__v, __root(), __end_node());
2375 if (__p != end() && !value_comp()(__v, *__p))
2380 template <class _Tp, class _Compare, class _Allocator>
2381 template <class _Key>
2382 typename __tree<_Tp, _Compare, _Allocator>::const_iterator
2383 __tree<_Tp, _Compare, _Allocator>::find(const _Key& __v) const
2385 const_iterator __p = __lower_bound(__v, __root(), __end_node());
2386 if (__p != end() && !value_comp()(__v, *__p))
2391 template <class _Tp, class _Compare, class _Allocator>
2392 template <class _Key>
2393 typename __tree<_Tp, _Compare, _Allocator>::size_type
2394 __tree<_Tp, _Compare, _Allocator>::__count_unique(const _Key& __k) const
2396 __node_pointer __rt = __root();
2397 while (__rt != nullptr)
2399 if (value_comp()(__k, __rt->__value_))
2401 __rt = static_cast<__node_pointer>(__rt->__left_);
2403 else if (value_comp()(__rt->__value_, __k))
2404 __rt = static_cast<__node_pointer>(__rt->__right_);
2411 template <class _Tp, class _Compare, class _Allocator>
2412 template <class _Key>
2413 typename __tree<_Tp, _Compare, _Allocator>::size_type
2414 __tree<_Tp, _Compare, _Allocator>::__count_multi(const _Key& __k) const
2416 __iter_pointer __result = __end_node();
2417 __node_pointer __rt = __root();
2418 while (__rt != nullptr)
2420 if (value_comp()(__k, __rt->__value_))
2422 __result = static_cast<__iter_pointer>(__rt);
2423 __rt = static_cast<__node_pointer>(__rt->__left_);
2425 else if (value_comp()(__rt->__value_, __k))
2426 __rt = static_cast<__node_pointer>(__rt->__right_);
2428 return _VSTD::distance(
2429 __lower_bound(__k, static_cast<__node_pointer>(__rt->__left_), static_cast<__iter_pointer>(__rt)),
2430 __upper_bound(__k, static_cast<__node_pointer>(__rt->__right_), __result)
2436 template <class _Tp, class _Compare, class _Allocator>
2437 template <class _Key>
2438 typename __tree<_Tp, _Compare, _Allocator>::iterator
2439 __tree<_Tp, _Compare, _Allocator>::__lower_bound(const _Key& __v,
2440 __node_pointer __root,
2441 __iter_pointer __result)
2443 while (__root != nullptr)
2445 if (!value_comp()(__root->__value_, __v))
2447 __result = static_cast<__iter_pointer>(__root);
2448 __root = static_cast<__node_pointer>(__root->__left_);
2451 __root = static_cast<__node_pointer>(__root->__right_);
2453 return iterator(__result);
2456 template <class _Tp, class _Compare, class _Allocator>
2457 template <class _Key>
2458 typename __tree<_Tp, _Compare, _Allocator>::const_iterator
2459 __tree<_Tp, _Compare, _Allocator>::__lower_bound(const _Key& __v,
2460 __node_pointer __root,
2461 __iter_pointer __result) const
2463 while (__root != nullptr)
2465 if (!value_comp()(__root->__value_, __v))
2467 __result = static_cast<__iter_pointer>(__root);
2468 __root = static_cast<__node_pointer>(__root->__left_);
2471 __root = static_cast<__node_pointer>(__root->__right_);
2473 return const_iterator(__result);
2476 template <class _Tp, class _Compare, class _Allocator>
2477 template <class _Key>
2478 typename __tree<_Tp, _Compare, _Allocator>::iterator
2479 __tree<_Tp, _Compare, _Allocator>::__upper_bound(const _Key& __v,
2480 __node_pointer __root,
2481 __iter_pointer __result)
2483 while (__root != nullptr)
2485 if (value_comp()(__v, __root->__value_))
2487 __result = static_cast<__iter_pointer>(__root);
2488 __root = static_cast<__node_pointer>(__root->__left_);
2491 __root = static_cast<__node_pointer>(__root->__right_);
2493 return iterator(__result);
2496 template <class _Tp, class _Compare, class _Allocator>
2497 template <class _Key>
2498 typename __tree<_Tp, _Compare, _Allocator>::const_iterator
2499 __tree<_Tp, _Compare, _Allocator>::__upper_bound(const _Key& __v,
2500 __node_pointer __root,
2501 __iter_pointer __result) const
2503 while (__root != nullptr)
2505 if (value_comp()(__v, __root->__value_))
2507 __result = static_cast<__iter_pointer>(__root);
2508 __root = static_cast<__node_pointer>(__root->__left_);
2511 __root = static_cast<__node_pointer>(__root->__right_);
2513 return const_iterator(__result);
2516 template <class _Tp, class _Compare, class _Allocator>
2517 template <class _Key>
2518 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator,
2519 typename __tree<_Tp, _Compare, _Allocator>::iterator>
2520 __tree<_Tp, _Compare, _Allocator>::__equal_range_unique(const _Key& __k)
2522 typedef pair<iterator, iterator> _Pp;
2523 __iter_pointer __result = __end_node();
2524 __node_pointer __rt = __root();
2525 while (__rt != nullptr)
2527 if (value_comp()(__k, __rt->__value_))
2529 __result = static_cast<__iter_pointer>(__rt);
2530 __rt = static_cast<__node_pointer>(__rt->__left_);
2532 else if (value_comp()(__rt->__value_, __k))
2533 __rt = static_cast<__node_pointer>(__rt->__right_);
2535 return _Pp(iterator(__rt),
2537 __rt->__right_ != nullptr ?
2538 static_cast<__iter_pointer>(__tree_min(__rt->__right_))
2541 return _Pp(iterator(__result), iterator(__result));
2544 template <class _Tp, class _Compare, class _Allocator>
2545 template <class _Key>
2546 pair<typename __tree<_Tp, _Compare, _Allocator>::const_iterator,
2547 typename __tree<_Tp, _Compare, _Allocator>::const_iterator>
2548 __tree<_Tp, _Compare, _Allocator>::__equal_range_unique(const _Key& __k) const
2550 typedef pair<const_iterator, const_iterator> _Pp;
2551 __iter_pointer __result = __end_node();
2552 __node_pointer __rt = __root();
2553 while (__rt != nullptr)
2555 if (value_comp()(__k, __rt->__value_))
2557 __result = static_cast<__iter_pointer>(__rt);
2558 __rt = static_cast<__node_pointer>(__rt->__left_);
2560 else if (value_comp()(__rt->__value_, __k))
2561 __rt = static_cast<__node_pointer>(__rt->__right_);
2563 return _Pp(const_iterator(__rt),
2565 __rt->__right_ != nullptr ?
2566 static_cast<__iter_pointer>(__tree_min(__rt->__right_))
2569 return _Pp(const_iterator(__result), const_iterator(__result));
2572 template <class _Tp, class _Compare, class _Allocator>
2573 template <class _Key>
2574 pair<typename __tree<_Tp, _Compare, _Allocator>::iterator,
2575 typename __tree<_Tp, _Compare, _Allocator>::iterator>
2576 __tree<_Tp, _Compare, _Allocator>::__equal_range_multi(const _Key& __k)
2578 typedef pair<iterator, iterator> _Pp;
2579 __iter_pointer __result = __end_node();
2580 __node_pointer __rt = __root();
2581 while (__rt != nullptr)
2583 if (value_comp()(__k, __rt->__value_))
2585 __result = static_cast<__iter_pointer>(__rt);
2586 __rt = static_cast<__node_pointer>(__rt->__left_);
2588 else if (value_comp()(__rt->__value_, __k))
2589 __rt = static_cast<__node_pointer>(__rt->__right_);
2591 return _Pp(__lower_bound(__k, static_cast<__node_pointer>(__rt->__left_), static_cast<__iter_pointer>(__rt)),
2592 __upper_bound(__k, static_cast<__node_pointer>(__rt->__right_), __result));
2594 return _Pp(iterator(__result), iterator(__result));
2597 template <class _Tp, class _Compare, class _Allocator>
2598 template <class _Key>
2599 pair<typename __tree<_Tp, _Compare, _Allocator>::const_iterator,
2600 typename __tree<_Tp, _Compare, _Allocator>::const_iterator>
2601 __tree<_Tp, _Compare, _Allocator>::__equal_range_multi(const _Key& __k) const
2603 typedef pair<const_iterator, const_iterator> _Pp;
2604 __iter_pointer __result = __end_node();
2605 __node_pointer __rt = __root();
2606 while (__rt != nullptr)
2608 if (value_comp()(__k, __rt->__value_))
2610 __result = static_cast<__iter_pointer>(__rt);
2611 __rt = static_cast<__node_pointer>(__rt->__left_);
2613 else if (value_comp()(__rt->__value_, __k))
2614 __rt = static_cast<__node_pointer>(__rt->__right_);
2616 return _Pp(__lower_bound(__k, static_cast<__node_pointer>(__rt->__left_), static_cast<__iter_pointer>(__rt)),
2617 __upper_bound(__k, static_cast<__node_pointer>(__rt->__right_), __result));
2619 return _Pp(const_iterator(__result), const_iterator(__result));
2622 template <class _Tp, class _Compare, class _Allocator>
2623 typename __tree<_Tp, _Compare, _Allocator>::__node_holder
2624 __tree<_Tp, _Compare, _Allocator>::remove(const_iterator __p) _NOEXCEPT
2626 __node_pointer __np = __p.__get_np();
2627 if (__begin_node() == __p.__ptr_)
2629 if (__np->__right_ != nullptr)
2630 __begin_node() = static_cast<__iter_pointer>(__np->__right_);
2632 __begin_node() = static_cast<__iter_pointer>(__np->__parent_);
2635 __tree_remove(__end_node()->__left_,
2636 static_cast<__node_base_pointer>(__np));
2637 return __node_holder(__np, _Dp(__node_alloc(), true));
2640 template <class _Tp, class _Compare, class _Allocator>
2641 inline _LIBCPP_INLINE_VISIBILITY
2643 swap(__tree<_Tp, _Compare, _Allocator>& __x,
2644 __tree<_Tp, _Compare, _Allocator>& __y)
2645 _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
2650 _LIBCPP_END_NAMESPACE_STD
2652 #endif // _LIBCPP___TREE