1 // Debugging deque implementation -*- C++ -*-
3 // Copyright (C) 2003-2022 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
26 * This file is a GNU debug extension to the Standard C++ Library.
29 #ifndef _GLIBCXX_DEBUG_DEQUE
30 #define _GLIBCXX_DEBUG_DEQUE 1
32 #pragma GCC system_header
34 #include <bits/c++config.h>
35 namespace std _GLIBCXX_VISIBILITY(default) { namespace __debug {
36 template<typename _Tp, typename _Allocator> class deque;
37 } } // namespace std::__debug
40 #include <debug/safe_sequence.h>
41 #include <debug/safe_container.h>
42 #include <debug/safe_iterator.h>
44 namespace std _GLIBCXX_VISIBILITY(default)
48 /// Class std::deque with safety/checking/debug instrumentation.
49 template<typename _Tp, typename _Allocator = std::allocator<_Tp> >
51 : public __gnu_debug::_Safe_container<
52 deque<_Tp, _Allocator>, _Allocator,
53 __gnu_debug::_Safe_sequence>,
54 public _GLIBCXX_STD_C::deque<_Tp, _Allocator>
56 typedef _GLIBCXX_STD_C::deque<_Tp, _Allocator> _Base;
57 typedef __gnu_debug::_Safe_container<
58 deque, _Allocator, __gnu_debug::_Safe_sequence> _Safe;
60 typedef typename _Base::const_iterator _Base_const_iterator;
61 typedef typename _Base::iterator _Base_iterator;
62 typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;
64 template<typename _ItT, typename _SeqT, typename _CatT>
65 friend class ::__gnu_debug::_Safe_iterator;
67 // Reference wrapper for base class. Disambiguates deque(const _Base&)
68 // from copy constructor by requiring a user-defined conversion.
69 // See PR libstdc++/90102.
72 _Base_ref(const _Base& __r) : _M_ref(__r) { }
78 typedef typename _Base::reference reference;
79 typedef typename _Base::const_reference const_reference;
81 typedef __gnu_debug::_Safe_iterator<_Base_iterator, deque>
83 typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, deque>
86 typedef typename _Base::size_type size_type;
87 typedef typename _Base::difference_type difference_type;
89 typedef _Tp value_type;
90 typedef _Allocator allocator_type;
91 typedef typename _Base::pointer pointer;
92 typedef typename _Base::const_pointer const_pointer;
93 typedef std::reverse_iterator<iterator> reverse_iterator;
94 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
96 // 23.2.1.1 construct/copy/destroy:
98 #if __cplusplus < 201103L
102 deque(const deque& __x)
108 deque(const deque&) = default;
109 deque(deque&&) = default;
111 deque(const deque& __d, const __type_identity_t<_Allocator>& __a)
112 : _Base(__d, __a) { }
114 deque(deque&& __d, const __type_identity_t<_Allocator>& __a)
115 : _Safe(std::move(__d)), _Base(std::move(__d), __a) { }
117 deque(initializer_list<value_type> __l,
118 const allocator_type& __a = allocator_type())
119 : _Base(__l, __a) { }
125 deque(const _Allocator& __a)
128 #if __cplusplus >= 201103L
130 deque(size_type __n, const _Allocator& __a = _Allocator())
131 : _Base(__n, __a) { }
133 deque(size_type __n, const __type_identity_t<_Tp>& __value,
134 const _Allocator& __a = _Allocator())
135 : _Base(__n, __value, __a) { }
138 deque(size_type __n, const _Tp& __value = _Tp(),
139 const _Allocator& __a = _Allocator())
140 : _Base(__n, __value, __a) { }
143 #if __cplusplus >= 201103L
144 template<class _InputIterator,
145 typename = std::_RequireInputIter<_InputIterator>>
147 template<class _InputIterator>
149 deque(_InputIterator __first, _InputIterator __last,
150 const _Allocator& __a = _Allocator())
151 : _Base(__gnu_debug::__base(
152 __glibcxx_check_valid_constructor_range(__first, __last)),
153 __gnu_debug::__base(__last), __a)
157 : _Base(__x._M_ref) { }
159 #if __cplusplus >= 201103L
161 operator=(const deque&) = default;
164 operator=(deque&&) = default;
167 operator=(initializer_list<value_type> __l)
169 _Base::operator=(__l);
170 this->_M_invalidate_all();
175 #if __cplusplus >= 201103L
176 template<class _InputIterator,
177 typename = std::_RequireInputIter<_InputIterator>>
179 template<class _InputIterator>
182 assign(_InputIterator __first, _InputIterator __last)
184 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
185 __glibcxx_check_valid_range2(__first, __last, __dist);
186 if (__dist.second >= __gnu_debug::__dp_sign)
187 _Base::assign(__gnu_debug::__unsafe(__first),
188 __gnu_debug::__unsafe(__last));
190 _Base::assign(__first, __last);
192 this->_M_invalidate_all();
196 assign(size_type __n, const _Tp& __t)
198 _Base::assign(__n, __t);
199 this->_M_invalidate_all();
202 #if __cplusplus >= 201103L
204 assign(initializer_list<value_type> __l)
207 this->_M_invalidate_all();
211 using _Base::get_allocator;
216 begin() _GLIBCXX_NOEXCEPT
217 { return iterator(_Base::begin(), this); }
221 begin() const _GLIBCXX_NOEXCEPT
222 { return const_iterator(_Base::begin(), this); }
226 end() _GLIBCXX_NOEXCEPT
227 { return iterator(_Base::end(), this); }
231 end() const _GLIBCXX_NOEXCEPT
232 { return const_iterator(_Base::end(), this); }
236 rbegin() _GLIBCXX_NOEXCEPT
237 { return reverse_iterator(end()); }
240 const_reverse_iterator
241 rbegin() const _GLIBCXX_NOEXCEPT
242 { return const_reverse_iterator(end()); }
246 rend() _GLIBCXX_NOEXCEPT
247 { return reverse_iterator(begin()); }
250 const_reverse_iterator
251 rend() const _GLIBCXX_NOEXCEPT
252 { return const_reverse_iterator(begin()); }
254 #if __cplusplus >= 201103L
257 cbegin() const noexcept
258 { return const_iterator(_Base::begin(), this); }
262 cend() const noexcept
263 { return const_iterator(_Base::end(), this); }
266 const_reverse_iterator
267 crbegin() const noexcept
268 { return const_reverse_iterator(end()); }
271 const_reverse_iterator
272 crend() const noexcept
273 { return const_reverse_iterator(begin()); }
278 _M_invalidate_after_nth(difference_type __n)
280 typedef __gnu_debug::_After_nth_from<_Base_const_iterator> _After_nth;
281 this->_M_invalidate_if(_After_nth(__n, _Base::begin()));
285 // 23.2.1.2 capacity:
287 using _Base::max_size;
289 #if __cplusplus >= 201103L
291 resize(size_type __sz)
293 bool __invalidate_all = __sz > this->size();
294 if (__sz < this->size())
295 this->_M_invalidate_after_nth(__sz);
299 if (__invalidate_all)
300 this->_M_invalidate_all();
304 resize(size_type __sz, const _Tp& __c)
306 bool __invalidate_all = __sz > this->size();
307 if (__sz < this->size())
308 this->_M_invalidate_after_nth(__sz);
310 _Base::resize(__sz, __c);
312 if (__invalidate_all)
313 this->_M_invalidate_all();
317 resize(size_type __sz, _Tp __c = _Tp())
319 bool __invalidate_all = __sz > this->size();
320 if (__sz < this->size())
321 this->_M_invalidate_after_nth(__sz);
323 _Base::resize(__sz, __c);
325 if (__invalidate_all)
326 this->_M_invalidate_all();
330 #if __cplusplus >= 201103L
332 shrink_to_fit() noexcept
334 if (_Base::_M_shrink_to_fit())
335 this->_M_invalidate_all();
344 operator[](size_type __n) _GLIBCXX_NOEXCEPT
346 __glibcxx_check_subscript(__n);
347 return _Base::operator[](__n);
352 operator[](size_type __n) const _GLIBCXX_NOEXCEPT
354 __glibcxx_check_subscript(__n);
355 return _Base::operator[](__n);
362 front() _GLIBCXX_NOEXCEPT
364 __glibcxx_check_nonempty();
365 return _Base::front();
370 front() const _GLIBCXX_NOEXCEPT
372 __glibcxx_check_nonempty();
373 return _Base::front();
378 back() _GLIBCXX_NOEXCEPT
380 __glibcxx_check_nonempty();
381 return _Base::back();
386 back() const _GLIBCXX_NOEXCEPT
388 __glibcxx_check_nonempty();
389 return _Base::back();
392 // 23.2.1.3 modifiers:
394 push_front(const _Tp& __x)
396 _Base::push_front(__x);
397 this->_M_invalidate_all();
401 push_back(const _Tp& __x)
403 _Base::push_back(__x);
404 this->_M_invalidate_all();
407 #if __cplusplus >= 201103L
409 push_front(_Tp&& __x)
410 { emplace_front(std::move(__x)); }
414 { emplace_back(std::move(__x)); }
416 template<typename... _Args>
417 #if __cplusplus > 201402L
422 emplace_front(_Args&&... __args)
424 _Base::emplace_front(std::forward<_Args>(__args)...);
425 this->_M_invalidate_all();
426 #if __cplusplus > 201402L
431 template<typename... _Args>
432 #if __cplusplus > 201402L
437 emplace_back(_Args&&... __args)
439 _Base::emplace_back(std::forward<_Args>(__args)...);
440 this->_M_invalidate_all();
441 #if __cplusplus > 201402L
446 template<typename... _Args>
448 emplace(const_iterator __position, _Args&&... __args)
450 __glibcxx_check_insert(__position);
451 _Base_iterator __res = _Base::emplace(__position.base(),
452 std::forward<_Args>(__args)...);
453 this->_M_invalidate_all();
454 return iterator(__res, this);
459 #if __cplusplus >= 201103L
460 insert(const_iterator __position, const _Tp& __x)
462 insert(iterator __position, const _Tp& __x)
465 __glibcxx_check_insert(__position);
466 _Base_iterator __res = _Base::insert(__position.base(), __x);
467 this->_M_invalidate_all();
468 return iterator(__res, this);
471 #if __cplusplus >= 201103L
473 insert(const_iterator __position, _Tp&& __x)
474 { return emplace(__position, std::move(__x)); }
477 insert(const_iterator __position, initializer_list<value_type> __l)
479 __glibcxx_check_insert(__position);
480 _Base_iterator __res = _Base::insert(__position.base(), __l);
481 this->_M_invalidate_all();
482 return iterator(__res, this);
486 #if __cplusplus >= 201103L
488 insert(const_iterator __position, size_type __n, const _Tp& __x)
490 __glibcxx_check_insert(__position);
491 _Base_iterator __res = _Base::insert(__position.base(), __n, __x);
492 this->_M_invalidate_all();
493 return iterator(__res, this);
497 insert(iterator __position, size_type __n, const _Tp& __x)
499 __glibcxx_check_insert(__position);
500 _Base::insert(__position.base(), __n, __x);
501 this->_M_invalidate_all();
505 #if __cplusplus >= 201103L
506 template<class _InputIterator,
507 typename = std::_RequireInputIter<_InputIterator>>
509 insert(const_iterator __position,
510 _InputIterator __first, _InputIterator __last)
512 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
513 __glibcxx_check_insert_range(__position, __first, __last, __dist);
514 _Base_iterator __res;
515 if (__dist.second >= __gnu_debug::__dp_sign)
516 __res = _Base::insert(__position.base(),
517 __gnu_debug::__unsafe(__first),
518 __gnu_debug::__unsafe(__last));
520 __res = _Base::insert(__position.base(), __first, __last);
522 this->_M_invalidate_all();
523 return iterator(__res, this);
526 template<class _InputIterator>
528 insert(iterator __position,
529 _InputIterator __first, _InputIterator __last)
531 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
532 __glibcxx_check_insert_range(__position, __first, __last, __dist);
534 if (__dist.second >= __gnu_debug::__dp_sign)
535 _Base::insert(__position.base(),
536 __gnu_debug::__unsafe(__first),
537 __gnu_debug::__unsafe(__last));
539 _Base::insert(__position.base(), __first, __last);
541 this->_M_invalidate_all();
546 pop_front() _GLIBCXX_NOEXCEPT
548 __glibcxx_check_nonempty();
549 this->_M_invalidate_if(_Equal(_Base::begin()));
554 pop_back() _GLIBCXX_NOEXCEPT
556 __glibcxx_check_nonempty();
557 this->_M_invalidate_if(_Equal(--_Base::end()));
562 #if __cplusplus >= 201103L
563 erase(const_iterator __position)
565 erase(iterator __position)
568 __glibcxx_check_erase(__position);
569 #if __cplusplus >= 201103L
570 _Base_const_iterator __victim = __position.base();
572 _Base_iterator __victim = __position.base();
574 if (__victim == _Base::begin() || __victim == _Base::end() - 1)
576 this->_M_invalidate_if(_Equal(__victim));
577 return iterator(_Base::erase(__victim), this);
581 _Base_iterator __res = _Base::erase(__victim);
582 this->_M_invalidate_all();
583 return iterator(__res, this);
588 #if __cplusplus >= 201103L
589 erase(const_iterator __first, const_iterator __last)
591 erase(iterator __first, iterator __last)
594 // _GLIBCXX_RESOLVE_LIB_DEFECTS
595 // 151. can't currently clear() empty container
596 __glibcxx_check_erase_range(__first, __last);
598 if (__first.base() == __last.base())
599 #if __cplusplus >= 201103L
600 return iterator(__first.base()._M_const_cast(), this);
604 else if (__first.base() == _Base::begin()
605 || __last.base() == _Base::end())
607 this->_M_detach_singular();
608 for (_Base_const_iterator __position = __first.base();
609 __position != __last.base(); ++__position)
611 this->_M_invalidate_if(_Equal(__position));
615 return iterator(_Base::erase(__first.base(), __last.base()),
620 this->_M_revalidate_singular();
621 __throw_exception_again;
626 _Base_iterator __res = _Base::erase(__first.base(),
628 this->_M_invalidate_all();
629 return iterator(__res, this);
635 _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) )
642 clear() _GLIBCXX_NOEXCEPT
645 this->_M_invalidate_all();
649 _M_base() _GLIBCXX_NOEXCEPT { return *this; }
652 _M_base() const _GLIBCXX_NOEXCEPT { return *this; }
655 #if __cpp_deduction_guides >= 201606
656 template<typename _InputIterator, typename _ValT
657 = typename iterator_traits<_InputIterator>::value_type,
658 typename _Allocator = allocator<_ValT>,
659 typename = _RequireInputIter<_InputIterator>,
660 typename = _RequireAllocator<_Allocator>>
661 deque(_InputIterator, _InputIterator, _Allocator = _Allocator())
662 -> deque<_ValT, _Allocator>;
664 template<typename _Tp, typename _Allocator = allocator<_Tp>,
665 typename = _RequireAllocator<_Allocator>>
666 deque(size_t, _Tp, _Allocator = _Allocator())
667 -> deque<_Tp, _Allocator>;
670 template<typename _Tp, typename _Alloc>
672 operator==(const deque<_Tp, _Alloc>& __lhs,
673 const deque<_Tp, _Alloc>& __rhs)
674 { return __lhs._M_base() == __rhs._M_base(); }
676 #if __cpp_lib_three_way_comparison
677 template<typename _Tp, typename _Alloc>
678 constexpr __detail::__synth3way_t<_Tp>
679 operator<=>(const deque<_Tp, _Alloc>& __x, const deque<_Tp, _Alloc>& __y)
680 { return __x._M_base() <=> __y._M_base(); }
682 template<typename _Tp, typename _Alloc>
684 operator!=(const deque<_Tp, _Alloc>& __lhs,
685 const deque<_Tp, _Alloc>& __rhs)
686 { return __lhs._M_base() != __rhs._M_base(); }
688 template<typename _Tp, typename _Alloc>
690 operator<(const deque<_Tp, _Alloc>& __lhs,
691 const deque<_Tp, _Alloc>& __rhs)
692 { return __lhs._M_base() < __rhs._M_base(); }
694 template<typename _Tp, typename _Alloc>
696 operator<=(const deque<_Tp, _Alloc>& __lhs,
697 const deque<_Tp, _Alloc>& __rhs)
698 { return __lhs._M_base() <= __rhs._M_base(); }
700 template<typename _Tp, typename _Alloc>
702 operator>=(const deque<_Tp, _Alloc>& __lhs,
703 const deque<_Tp, _Alloc>& __rhs)
704 { return __lhs._M_base() >= __rhs._M_base(); }
706 template<typename _Tp, typename _Alloc>
708 operator>(const deque<_Tp, _Alloc>& __lhs,
709 const deque<_Tp, _Alloc>& __rhs)
710 { return __lhs._M_base() > __rhs._M_base(); }
711 #endif // three-way comparison
713 template<typename _Tp, typename _Alloc>
715 swap(deque<_Tp, _Alloc>& __lhs, deque<_Tp, _Alloc>& __rhs)
716 _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
717 { __lhs.swap(__rhs); }
719 } // namespace __debug