libstdc++-v3/include/debug/deque - rust-lang/gcc - Git at Google

 // Debugging deque implementation -*- C++ -*-

 // Copyright (C) 2003-2018 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
 // terms of the GNU General Public License as published by the
 // Free Software Foundation; either version 3, or (at your option)
 // any later version.

 // This library is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.

 // Under Section 7 of GPL version 3, you are granted additional
 // permissions described in the GCC Runtime Library Exception, version
 // 3.1, as published by the Free Software Foundation.

 // You should have received a copy of the GNU General Public License and
 // a copy of the GCC Runtime Library Exception along with this program;
 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 // <http://www.gnu.org/licenses/>.

 /** @file debug/deque
  *  This file is a GNU debug extension to the Standard C++ Library.
  */

 #ifndef _GLIBCXX_DEBUG_DEQUE
 #define _GLIBCXX_DEBUG_DEQUE 1

 #pragma GCC system_header

 #include <deque>
 #include <debug/safe_sequence.h>
 #include <debug/safe_container.h>
 #include <debug/safe_iterator.h>

 namespace std _GLIBCXX_VISIBILITY(default)
 {
 namespace __debug
 {
   /// Class std::deque with safety/checking/debug instrumentation.
   template<typename _Tp, typename _Allocator = std::allocator<_Tp> >
     class deque
     : public __gnu_debug::_Safe_container<
 	deque<_Tp, _Allocator>, _Allocator,
 	__gnu_debug::_Safe_sequence>,
       public _GLIBCXX_STD_C::deque<_Tp, _Allocator>
     {
       typedef  _GLIBCXX_STD_C::deque<_Tp, _Allocator>		_Base;
       typedef __gnu_debug::_Safe_container<
 	deque, _Allocator, __gnu_debug::_Safe_sequence>	_Safe;

       typedef typename _Base::const_iterator	_Base_const_iterator;
       typedef typename _Base::iterator		_Base_iterator;
       typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;

     public:
       typedef typename _Base::reference			reference;
       typedef typename _Base::const_reference		const_reference;

       typedef __gnu_debug::_Safe_iterator<_Base_iterator, deque>
 							iterator;
       typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, deque>
 							const_iterator;

       typedef typename _Base::size_type			size_type;
       typedef typename _Base::difference_type		difference_type;

       typedef _Tp					value_type;
       typedef _Allocator				allocator_type;
       typedef typename _Base::pointer			pointer;
       typedef typename _Base::const_pointer		const_pointer;
       typedef std::reverse_iterator<iterator>		reverse_iterator;
       typedef std::reverse_iterator<const_iterator>	const_reverse_iterator;

       // 23.2.1.1 construct/copy/destroy:

 #if __cplusplus < 201103L
       deque()
       : _Base() { }

       deque(const deque& __x)
       : _Base(__x) { }

       ~deque() { }
 #else
       deque() = default;
       deque(const deque&) = default;
       deque(deque&&) = default;

       deque(const deque& __d, const _Allocator& __a)
       : _Base(__d, __a) { }

       deque(deque&& __d, const _Allocator& __a)
       : _Safe(std::move(__d)), _Base(std::move(__d), __a) { }

       deque(initializer_list<value_type> __l,
 	    const allocator_type& __a = allocator_type())
       : _Base(__l, __a) { }

       ~deque() = default;
 #endif

       explicit
       deque(const _Allocator& __a)
       : _Base(__a) { }

 #if __cplusplus >= 201103L
       explicit
       deque(size_type __n, const _Allocator& __a = _Allocator())
       : _Base(__n, __a) { }

       deque(size_type __n, const _Tp& __value,
 	    const _Allocator& __a = _Allocator())
       : _Base(__n, __value, __a) { }
 #else
       explicit
       deque(size_type __n, const _Tp& __value = _Tp(),
 	    const _Allocator& __a = _Allocator())
       : _Base(__n, __value, __a) { }
 #endif

 #if __cplusplus >= 201103L
       template<class _InputIterator,
 	       typename = std::_RequireInputIter<_InputIterator>>
 #else
       template<class _InputIterator>
 #endif
 	deque(_InputIterator __first, _InputIterator __last,
 	      const _Allocator& __a = _Allocator())
 	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
 								     __last)),
 		__gnu_debug::__base(__last), __a)
 	{ }

       deque(const _Base& __x)
       : _Base(__x) { }

 #if __cplusplus < 201103L
       deque&
       operator=(const deque& __x)
       {
 	this->_M_safe() = __x;
 	_M_base() = __x;
 	return *this;
       }
 #else
       deque&
       operator=(const deque&) = default;

       deque&
       operator=(deque&&) = default;

       deque&
       operator=(initializer_list<value_type> __l)
       {
 	_M_base() = __l;
 	this->_M_invalidate_all();
 	return *this;
       }
 #endif

 #if __cplusplus >= 201103L
       template<class _InputIterator,
 	       typename = std::_RequireInputIter<_InputIterator>>
 #else
       template<class _InputIterator>
 #endif
 	void
 	assign(_InputIterator __first, _InputIterator __last)
 	{
 	  typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
 	  __glibcxx_check_valid_range2(__first, __last, __dist);
 	  if (__dist.second >= __gnu_debug::__dp_sign)
 	    _Base::assign(__gnu_debug::__unsafe(__first),
 			  __gnu_debug::__unsafe(__last));
 	  else
 	    _Base::assign(__first, __last);

 	  this->_M_invalidate_all();
 	}

       void
       assign(size_type __n, const _Tp& __t)
       {
 	_Base::assign(__n, __t);
 	this->_M_invalidate_all();
       }

 #if __cplusplus >= 201103L
       void
       assign(initializer_list<value_type> __l)
       {
 	_Base::assign(__l);
 	this->_M_invalidate_all();
       }
 #endif

       using _Base::get_allocator;

       // iterators:
       iterator
       begin() _GLIBCXX_NOEXCEPT
       { return iterator(_Base::begin(), this); }

       const_iterator
       begin() const _GLIBCXX_NOEXCEPT
       { return const_iterator(_Base::begin(), this); }

       iterator
       end() _GLIBCXX_NOEXCEPT
       { return iterator(_Base::end(), this); }

       const_iterator
       end() const _GLIBCXX_NOEXCEPT
       { return const_iterator(_Base::end(), this); }

       reverse_iterator
       rbegin() _GLIBCXX_NOEXCEPT
       { return reverse_iterator(end()); }

       const_reverse_iterator
       rbegin() const _GLIBCXX_NOEXCEPT
       { return const_reverse_iterator(end()); }

       reverse_iterator
       rend() _GLIBCXX_NOEXCEPT
       { return reverse_iterator(begin()); }

       const_reverse_iterator
       rend() const _GLIBCXX_NOEXCEPT
       { return const_reverse_iterator(begin()); }

 #if __cplusplus >= 201103L
       const_iterator
       cbegin() const noexcept
       { return const_iterator(_Base::begin(), this); }

       const_iterator
       cend() const noexcept
       { return const_iterator(_Base::end(), this); }

       const_reverse_iterator
       crbegin() const noexcept
       { return const_reverse_iterator(end()); }

       const_reverse_iterator
       crend() const noexcept
       { return const_reverse_iterator(begin()); }
 #endif

     private:
       void
       _M_invalidate_after_nth(difference_type __n)
       {
 	typedef __gnu_debug::_After_nth_from<_Base_const_iterator> _After_nth;
 	this->_M_invalidate_if(_After_nth(__n, _Base::begin()));
       }

     public:
       // 23.2.1.2 capacity:
       using _Base::size;
       using _Base::max_size;

 #if __cplusplus >= 201103L
       void
       resize(size_type __sz)
       {
 	bool __invalidate_all = __sz > this->size();
 	if (__sz < this->size())
 	  this->_M_invalidate_after_nth(__sz);

 	_Base::resize(__sz);

 	if (__invalidate_all)
 	  this->_M_invalidate_all();
       }

       void
       resize(size_type __sz, const _Tp& __c)
       {
 	bool __invalidate_all = __sz > this->size();
 	if (__sz < this->size())
 	  this->_M_invalidate_after_nth(__sz);

 	_Base::resize(__sz, __c);

 	if (__invalidate_all)
 	  this->_M_invalidate_all();
       }
 #else
       void
       resize(size_type __sz, _Tp __c = _Tp())
       {
 	bool __invalidate_all = __sz > this->size();
 	if (__sz < this->size())
 	  this->_M_invalidate_after_nth(__sz);

 	_Base::resize(__sz, __c);

 	if (__invalidate_all)
 	  this->_M_invalidate_all();
       }
 #endif

 #if __cplusplus >= 201103L
       void
       shrink_to_fit() noexcept
       {
 	if (_Base::_M_shrink_to_fit())
 	  this->_M_invalidate_all();
       }
 #endif

       using _Base::empty;

       // element access:
       reference
       operator[](size_type __n) _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_subscript(__n);
 	return _M_base()[__n];
       }

       const_reference
       operator[](size_type __n) const _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_subscript(__n);
 	return _M_base()[__n];
       }

       using _Base::at;

       reference
       front() _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	return _Base::front();
       }

       const_reference
       front() const _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	return _Base::front();
       }

       reference
       back() _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	return _Base::back();
       }

       const_reference
       back() const _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	return _Base::back();
       }

       // 23.2.1.3 modifiers:
       void
       push_front(const _Tp& __x)
       {
 	_Base::push_front(__x);
 	this->_M_invalidate_all();
       }

       void
       push_back(const _Tp& __x)
       {
 	_Base::push_back(__x);
 	this->_M_invalidate_all();
       }

 #if __cplusplus >= 201103L
       void
       push_front(_Tp&& __x)
       { emplace_front(std::move(__x)); }

       void
       push_back(_Tp&& __x)
       { emplace_back(std::move(__x)); }

       template<typename... _Args>
 #if __cplusplus > 201402L
 	reference
 #else
 	void
 #endif
 	emplace_front(_Args&&... __args)
 	{
 	  _Base::emplace_front(std::forward<_Args>(__args)...);
 	  this->_M_invalidate_all();
 #if __cplusplus > 201402L
 	  return front();
 #endif
 	}

       template<typename... _Args>
 #if __cplusplus > 201402L
 	reference
 #else
 	void
 #endif
 	emplace_back(_Args&&... __args)
 	{
 	  _Base::emplace_back(std::forward<_Args>(__args)...);
 	  this->_M_invalidate_all();
 #if __cplusplus > 201402L
 	  return back();
 #endif
 	}

       template<typename... _Args>
 	iterator
 	emplace(const_iterator __position, _Args&&... __args)
 	{
 	  __glibcxx_check_insert(__position);
 	  _Base_iterator __res = _Base::emplace(__position.base(),
 						std::forward<_Args>(__args)...);
 	  this->_M_invalidate_all();
 	  return iterator(__res, this);
 	}
 #endif

       iterator
 #if __cplusplus >= 201103L
       insert(const_iterator __position, const _Tp& __x)
 #else
       insert(iterator __position, const _Tp& __x)
 #endif
       {
 	__glibcxx_check_insert(__position);
 	_Base_iterator __res = _Base::insert(__position.base(), __x);
 	this->_M_invalidate_all();
 	return iterator(__res, this);
       }

 #if __cplusplus >= 201103L
       iterator
       insert(const_iterator __position, _Tp&& __x)
       { return emplace(__position, std::move(__x)); }

       iterator
       insert(const_iterator __position, initializer_list<value_type> __l)
       {
 	__glibcxx_check_insert(__position);
 	_Base_iterator __res = _Base::insert(__position.base(), __l);
 	this->_M_invalidate_all();
 	return iterator(__res, this);
       }
 #endif

 #if __cplusplus >= 201103L
       iterator
       insert(const_iterator __position, size_type __n, const _Tp& __x)
       {
 	__glibcxx_check_insert(__position);
 	_Base_iterator __res = _Base::insert(__position.base(), __n, __x);
 	this->_M_invalidate_all();
 	return iterator(__res, this);
       }
 #else
       void
       insert(iterator __position, size_type __n, const _Tp& __x)
       {
 	__glibcxx_check_insert(__position);
 	_Base::insert(__position.base(), __n, __x);
 	this->_M_invalidate_all();
       }
 #endif

 #if __cplusplus >= 201103L
       template<class _InputIterator,
 	       typename = std::_RequireInputIter<_InputIterator>>
 	iterator
 	insert(const_iterator __position,
 	       _InputIterator __first, _InputIterator __last)
 	{
 	  typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
 	  __glibcxx_check_insert_range(__position, __first, __last, __dist);
 	  _Base_iterator __res;
 	  if (__dist.second >= __gnu_debug::__dp_sign)
 	    __res = _Base::insert(__position.base(),
 				  __gnu_debug::__unsafe(__first),
 				  __gnu_debug::__unsafe(__last));
 	  else
 	    __res = _Base::insert(__position.base(), __first, __last);

 	  this->_M_invalidate_all();
 	  return iterator(__res, this);
 	}
 #else
       template<class _InputIterator>
 	void
 	insert(iterator __position,
 	       _InputIterator __first, _InputIterator __last)
 	{
 	  typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
 	  __glibcxx_check_insert_range(__position, __first, __last, __dist);

 	  if (__dist.second >= __gnu_debug::__dp_sign)
 	    _Base::insert(__position.base(),
 			  __gnu_debug::__unsafe(__first),
 			  __gnu_debug::__unsafe(__last));
 	  else
 	    _Base::insert(__position.base(), __first, __last);

 	  this->_M_invalidate_all();
 	}
 #endif

       void
       pop_front() _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	this->_M_invalidate_if(_Equal(_Base::begin()));
 	_Base::pop_front();
       }

       void
       pop_back() _GLIBCXX_NOEXCEPT
       {
 	__glibcxx_check_nonempty();
 	this->_M_invalidate_if(_Equal(--_Base::end()));
 	_Base::pop_back();
       }

       iterator
 #if __cplusplus >= 201103L
       erase(const_iterator __position)
 #else
       erase(iterator __position)
 #endif
       {
 	__glibcxx_check_erase(__position);
 #if __cplusplus >= 201103L
 	_Base_const_iterator __victim = __position.base();
 #else
 	_Base_iterator __victim = __position.base();
 #endif
 	if (__victim == _Base::begin() || __victim == _Base::end() - 1)
 	  {
 	    this->_M_invalidate_if(_Equal(__victim));
 	    return iterator(_Base::erase(__victim), this);
 	  }
 	else
 	  {
 	    _Base_iterator __res = _Base::erase(__victim);
 	    this->_M_invalidate_all();
 	    return iterator(__res, this);
 	  }
       }

       iterator
 #if __cplusplus >= 201103L
       erase(const_iterator __first, const_iterator __last)
 #else
       erase(iterator __first, iterator __last)
 #endif
       {
 	// _GLIBCXX_RESOLVE_LIB_DEFECTS
 	// 151. can't currently clear() empty container
 	__glibcxx_check_erase_range(__first, __last);

 	if (__first.base() == __last.base())
 #if __cplusplus >= 201103L
 	  return iterator(__first.base()._M_const_cast(), this);
 #else
 	  return __first;
 #endif
 	else if (__first.base() == _Base::begin()
 		 || __last.base() == _Base::end())
 	  {
 	    this->_M_detach_singular();
 	    for (_Base_const_iterator __position = __first.base();
 		 __position != __last.base(); ++__position)
 	      {
 		this->_M_invalidate_if(_Equal(__position));
 	      }
 	    __try
 	      {
 		return iterator(_Base::erase(__first.base(), __last.base()),
 				this);
 	      }
 	    __catch(...)
 	      {
 		this->_M_revalidate_singular();
 		__throw_exception_again;
 	      }
 	  }
 	else
 	  {
 	    _Base_iterator __res = _Base::erase(__first.base(),
 						__last.base());
 	    this->_M_invalidate_all();
 	    return iterator(__res, this);
 	  }
       }

       void
       swap(deque& __x)
       _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) )
       {
 	_Safe::_M_swap(__x);
 	_Base::swap(__x);
       }

       void
       clear() _GLIBCXX_NOEXCEPT
       {
 	_Base::clear();
 	this->_M_invalidate_all();
       }

       _Base&
       _M_base() _GLIBCXX_NOEXCEPT	{ return *this; }

       const _Base&
       _M_base() const _GLIBCXX_NOEXCEPT	{ return *this; }
     };

 #if __cpp_deduction_guides >= 201606
   template<typename _InputIterator, typename _ValT
 	     = typename iterator_traits<_InputIterator>::value_type,
 	   typename _Allocator = allocator<_ValT>,
 	   typename = _RequireInputIter<_InputIterator>,
 	   typename = _RequireAllocator<_Allocator>>
     deque(_InputIterator, _InputIterator, _Allocator = _Allocator())
       -> deque<_ValT, _Allocator>;
 #endif

   template<typename _Tp, typename _Alloc>
     inline bool
     operator==(const deque<_Tp, _Alloc>& __lhs,
 	       const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() == __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline bool
     operator!=(const deque<_Tp, _Alloc>& __lhs,
 	       const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() != __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline bool
     operator<(const deque<_Tp, _Alloc>& __lhs,
 	      const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() < __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline bool
     operator<=(const deque<_Tp, _Alloc>& __lhs,
 	       const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() <= __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline bool
     operator>=(const deque<_Tp, _Alloc>& __lhs,
 	       const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() >= __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline bool
     operator>(const deque<_Tp, _Alloc>& __lhs,
 	      const deque<_Tp, _Alloc>& __rhs)
     { return __lhs._M_base() > __rhs._M_base(); }

   template<typename _Tp, typename _Alloc>
     inline void
     swap(deque<_Tp, _Alloc>& __lhs, deque<_Tp, _Alloc>& __rhs)
     _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
     { __lhs.swap(__rhs); }

 } // namespace __debug
 } // namespace std

 #endif
	// Debugging deque implementation -- C++ --

	// Copyright (C) 2003-2018 Free Software Foundation, Inc.
	//
	// This file is part of the GNU ISO C++ Library. This library is free
	// software; you can redistribute it and/or modify it under the
	// terms of the GNU General Public License as published by the
	// Free Software Foundation; either version 3, or (at your option)
	// any later version.

	// This library is distributed in the hope that it will be useful,
	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	// GNU General Public License for more details.

	// Under Section 7 of GPL version 3, you are granted additional
	// permissions described in the GCC Runtime Library Exception, version
	// 3.1, as published by the Free Software Foundation.

	// You should have received a copy of the GNU General Public License and
	// a copy of the GCC Runtime Library Exception along with this program;
	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	// <http://www.gnu.org/licenses/>.

	/** @file debug/deque
	* This file is a GNU debug extension to the Standard C++ Library.
	*/

	#ifndef _GLIBCXX_DEBUG_DEQUE
	#define _GLIBCXX_DEBUG_DEQUE 1

	#pragma GCC system_header

	#include <deque>
	#include <debug/safe_sequence.h>
	#include <debug/safe_container.h>
	#include <debug/safe_iterator.h>

	namespace std _GLIBCXX_VISIBILITY(default)
	{
	namespace __debug
	{
	/// Class std::deque with safety/checking/debug instrumentation.
	template<typename _Tp, typename _Allocator = std::allocator<_Tp> >
	class deque
	: public __gnu_debug::_Safe_container<
	deque<_Tp, _Allocator>, _Allocator,
	__gnu_debug::_Safe_sequence>,
	public _GLIBCXX_STD_C::deque<_Tp, _Allocator>
	{
	typedef _GLIBCXX_STD_C::deque<_Tp, _Allocator> _Base;
	typedef __gnu_debug::_Safe_container<
	deque, _Allocator, __gnu_debug::_Safe_sequence> _Safe;

	typedef typename _Base::const_iterator _Base_const_iterator;
	typedef typename _Base::iterator _Base_iterator;
	typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;

	public:
	typedef typename _Base::reference reference;
	typedef typename _Base::const_reference const_reference;

	typedef __gnu_debug::_Safe_iterator<_Base_iterator, deque>
	iterator;
	typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, deque>
	const_iterator;

	typedef typename _Base::size_type size_type;
	typedef typename _Base::difference_type difference_type;

	typedef _Tp value_type;
	typedef _Allocator allocator_type;
	typedef typename _Base::pointer pointer;
	typedef typename _Base::const_pointer const_pointer;
	typedef std::reverse_iterator<iterator> reverse_iterator;
	typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

	// 23.2.1.1 construct/copy/destroy:

	#if __cplusplus < 201103L
	deque()
	: _Base() { }

	deque(const deque& __x)
	: _Base(__x) { }

	~deque() { }
	#else
	deque() = default;
	deque(const deque&) = default;
	deque(deque&&) = default;

	deque(const deque& __d, const _Allocator& __a)
	: _Base(__d, __a) { }

	deque(deque&& __d, const _Allocator& __a)
	: _Safe(std::move(__d)), _Base(std::move(__d), __a) { }

	deque(initializer_list<value_type> __l,
	const allocator_type& __a = allocator_type())
	: _Base(__l, __a) { }

	~deque() = default;
	#endif

	explicit
	deque(const _Allocator& __a)
	: _Base(__a) { }

	#if __cplusplus >= 201103L
	explicit
	deque(size_type __n, const _Allocator& __a = _Allocator())
	: _Base(__n, __a) { }

	deque(size_type __n, const _Tp& __value,
	const _Allocator& __a = _Allocator())
	: _Base(__n, __value, __a) { }
	#else
	explicit
	deque(size_type __n, const _Tp& __value = _Tp(),
	const _Allocator& __a = _Allocator())
	: _Base(__n, __value, __a) { }
	#endif

	#if __cplusplus >= 201103L
	template<class _InputIterator,
	typename = std::_RequireInputIter<_InputIterator>>
	#else
	template<class _InputIterator>
	#endif
	deque(_InputIterator __first, _InputIterator __last,
	const _Allocator& __a = _Allocator())
	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
	__last)),
	__gnu_debug::__base(__last), __a)
	{ }

	deque(const _Base& __x)
	: _Base(__x) { }

	#if __cplusplus < 201103L
	deque&
	operator=(const deque& __x)
	{
	this->_M_safe() = __x;
	_M_base() = __x;
	return *this;
	}
	#else
	deque&
	operator=(const deque&) = default;

	deque&
	operator=(deque&&) = default;

	deque&
	operator=(initializer_list<value_type> __l)
	{
	_M_base() = __l;
	this->_M_invalidate_all();
	return *this;
	}
	#endif

	#if __cplusplus >= 201103L
	template<class _InputIterator,
	typename = std::_RequireInputIter<_InputIterator>>
	#else
	template<class _InputIterator>
	#endif
	void
	assign(_InputIterator __first, _InputIterator __last)
	{
	typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
	__glibcxx_check_valid_range2(__first, __last, __dist);
	if (__dist.second >= __gnu_debug::__dp_sign)
	_Base::assign(__gnu_debug::__unsafe(__first),
	__gnu_debug::__unsafe(__last));
	else
	_Base::assign(__first, __last);

	this->_M_invalidate_all();
	}

	void
	assign(size_type __n, const _Tp& __t)
	{
	_Base::assign(__n, __t);
	this->_M_invalidate_all();
	}

	#if __cplusplus >= 201103L
	void
	assign(initializer_list<value_type> __l)
	{
	_Base::assign(__l);
	this->_M_invalidate_all();
	}
	#endif

	using _Base::get_allocator;

	// iterators:
	iterator
	begin() _GLIBCXX_NOEXCEPT
	{ return iterator(_Base::begin(), this); }

	const_iterator
	begin() const _GLIBCXX_NOEXCEPT
	{ return const_iterator(_Base::begin(), this); }

	iterator
	end() _GLIBCXX_NOEXCEPT
	{ return iterator(_Base::end(), this); }

	const_iterator
	end() const _GLIBCXX_NOEXCEPT
	{ return const_iterator(_Base::end(), this); }

	reverse_iterator
	rbegin() _GLIBCXX_NOEXCEPT
	{ return reverse_iterator(end()); }

	const_reverse_iterator
	rbegin() const _GLIBCXX_NOEXCEPT
	{ return const_reverse_iterator(end()); }

	reverse_iterator
	rend() _GLIBCXX_NOEXCEPT
	{ return reverse_iterator(begin()); }

	const_reverse_iterator
	rend() const _GLIBCXX_NOEXCEPT
	{ return const_reverse_iterator(begin()); }

	#if __cplusplus >= 201103L
	const_iterator
	cbegin() const noexcept
	{ return const_iterator(_Base::begin(), this); }

	const_iterator
	cend() const noexcept
	{ return const_iterator(_Base::end(), this); }

	const_reverse_iterator
	crbegin() const noexcept
	{ return const_reverse_iterator(end()); }

	const_reverse_iterator
	crend() const noexcept
	{ return const_reverse_iterator(begin()); }
	#endif

	private:
	void
	_M_invalidate_after_nth(difference_type __n)
	{
	typedef __gnu_debug::_After_nth_from<_Base_const_iterator> _After_nth;
	this->_M_invalidate_if(_After_nth(__n, _Base::begin()));
	}

	public:
	// 23.2.1.2 capacity:
	using _Base::size;
	using _Base::max_size;

	#if __cplusplus >= 201103L
	void
	resize(size_type __sz)
	{
	bool __invalidate_all = __sz > this->size();
	if (__sz < this->size())
	this->_M_invalidate_after_nth(__sz);

	_Base::resize(__sz);

	if (__invalidate_all)
	this->_M_invalidate_all();
	}

	void
	resize(size_type __sz, const _Tp& __c)
	{
	bool __invalidate_all = __sz > this->size();
	if (__sz < this->size())
	this->_M_invalidate_after_nth(__sz);

	_Base::resize(__sz, __c);

	if (__invalidate_all)
	this->_M_invalidate_all();
	}
	#else
	void
	resize(size_type __sz, _Tp __c = _Tp())
	{
	bool __invalidate_all = __sz > this->size();
	if (__sz < this->size())
	this->_M_invalidate_after_nth(__sz);

	_Base::resize(__sz, __c);

	if (__invalidate_all)
	this->_M_invalidate_all();
	}
	#endif

	#if __cplusplus >= 201103L
	void
	shrink_to_fit() noexcept
	{
	if (_Base::_M_shrink_to_fit())
	this->_M_invalidate_all();
	}
	#endif

	using _Base::empty;

	// element access:
	reference
	operator[](size_type __n) _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_subscript(__n);
	return _M_base()[__n];
	}

	const_reference
	operator[](size_type __n) const _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_subscript(__n);
	return _M_base()[__n];
	}

	using _Base::at;

	reference
	front() _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	return _Base::front();
	}

	const_reference
	front() const _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	return _Base::front();
	}

	reference
	back() _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	return _Base::back();
	}

	const_reference
	back() const _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	return _Base::back();
	}

	// 23.2.1.3 modifiers:
	void
	push_front(const _Tp& __x)
	{
	_Base::push_front(__x);
	this->_M_invalidate_all();
	}

	void
	push_back(const _Tp& __x)
	{
	_Base::push_back(__x);
	this->_M_invalidate_all();
	}

	#if __cplusplus >= 201103L
	void
	push_front(_Tp&& __x)
	{ emplace_front(std::move(__x)); }

	void
	push_back(_Tp&& __x)
	{ emplace_back(std::move(__x)); }

	template<typename... _Args>
	#if __cplusplus > 201402L
	reference
	#else
	void
	#endif
	emplace_front(_Args&&... __args)
	{
	_Base::emplace_front(std::forward<_Args>(__args)...);
	this->_M_invalidate_all();
	#if __cplusplus > 201402L
	return front();
	#endif
	}

	template<typename... _Args>
	#if __cplusplus > 201402L
	reference
	#else
	void
	#endif
	emplace_back(_Args&&... __args)
	{
	_Base::emplace_back(std::forward<_Args>(__args)...);
	this->_M_invalidate_all();
	#if __cplusplus > 201402L
	return back();
	#endif
	}

	template<typename... _Args>
	iterator
	emplace(const_iterator __position, _Args&&... __args)
	{
	__glibcxx_check_insert(__position);
	_Base_iterator __res = _Base::emplace(__position.base(),
	std::forward<_Args>(__args)...);
	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	#endif

	iterator
	#if __cplusplus >= 201103L
	insert(const_iterator __position, const _Tp& __x)
	#else
	insert(iterator __position, const _Tp& __x)
	#endif
	{
	__glibcxx_check_insert(__position);
	_Base_iterator __res = _Base::insert(__position.base(), __x);
	this->_M_invalidate_all();
	return iterator(__res, this);
	}

	#if __cplusplus >= 201103L
	iterator
	insert(const_iterator __position, _Tp&& __x)
	{ return emplace(__position, std::move(__x)); }

	iterator
	insert(const_iterator __position, initializer_list<value_type> __l)
	{
	__glibcxx_check_insert(__position);
	_Base_iterator __res = _Base::insert(__position.base(), __l);
	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	#endif

	#if __cplusplus >= 201103L
	iterator
	insert(const_iterator __position, size_type __n, const _Tp& __x)
	{
	__glibcxx_check_insert(__position);
	_Base_iterator __res = _Base::insert(__position.base(), __n, __x);
	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	#else
	void
	insert(iterator __position, size_type __n, const _Tp& __x)
	{
	__glibcxx_check_insert(__position);
	_Base::insert(__position.base(), __n, __x);
	this->_M_invalidate_all();
	}
	#endif

	#if __cplusplus >= 201103L
	template<class _InputIterator,
	typename = std::_RequireInputIter<_InputIterator>>
	iterator
	insert(const_iterator __position,
	_InputIterator __first, _InputIterator __last)
	{
	typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
	__glibcxx_check_insert_range(__position, __first, __last, __dist);
	_Base_iterator __res;
	if (__dist.second >= __gnu_debug::__dp_sign)
	__res = _Base::insert(__position.base(),
	__gnu_debug::__unsafe(__first),
	__gnu_debug::__unsafe(__last));
	else
	__res = _Base::insert(__position.base(), __first, __last);

	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	#else
	template<class _InputIterator>
	void
	insert(iterator __position,
	_InputIterator __first, _InputIterator __last)
	{
	typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
	__glibcxx_check_insert_range(__position, __first, __last, __dist);

	if (__dist.second >= __gnu_debug::__dp_sign)
	_Base::insert(__position.base(),
	__gnu_debug::__unsafe(__first),
	__gnu_debug::__unsafe(__last));
	else
	_Base::insert(__position.base(), __first, __last);

	this->_M_invalidate_all();
	}
	#endif

	void
	pop_front() _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	this->_M_invalidate_if(_Equal(_Base::begin()));
	_Base::pop_front();
	}

	void
	pop_back() _GLIBCXX_NOEXCEPT
	{
	__glibcxx_check_nonempty();
	this->_M_invalidate_if(_Equal(--_Base::end()));
	_Base::pop_back();
	}

	iterator
	#if __cplusplus >= 201103L
	erase(const_iterator __position)
	#else
	erase(iterator __position)
	#endif
	{
	__glibcxx_check_erase(__position);
	#if __cplusplus >= 201103L
	_Base_const_iterator __victim = __position.base();
	#else
	_Base_iterator __victim = __position.base();
	#endif
	if (__victim == _Base::begin() \|\| __victim == _Base::end() - 1)
	{
	this->_M_invalidate_if(_Equal(__victim));
	return iterator(_Base::erase(__victim), this);
	}
	else
	{
	_Base_iterator __res = _Base::erase(__victim);
	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	}

	iterator
	#if __cplusplus >= 201103L
	erase(const_iterator __first, const_iterator __last)
	#else
	erase(iterator __first, iterator __last)
	#endif
	{
	// _GLIBCXX_RESOLVE_LIB_DEFECTS
	// 151. can't currently clear() empty container
	__glibcxx_check_erase_range(__first, __last);

	if (__first.base() == __last.base())
	#if __cplusplus >= 201103L
	return iterator(__first.base()._M_const_cast(), this);
	#else
	return __first;
	#endif
	else if (__first.base() == _Base::begin()
	\|\| __last.base() == _Base::end())
	{
	this->_M_detach_singular();
	for (_Base_const_iterator __position = __first.base();
	__position != __last.base(); ++__position)
	{
	this->_M_invalidate_if(_Equal(__position));
	}
	__try
	{
	return iterator(_Base::erase(__first.base(), __last.base()),
	this);
	}
	__catch(...)
	{
	this->_M_revalidate_singular();
	__throw_exception_again;
	}
	}
	else
	{
	_Base_iterator __res = _Base::erase(__first.base(),
	__last.base());
	this->_M_invalidate_all();
	return iterator(__res, this);
	}
	}

	void
	swap(deque& __x)
	_GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) )
	{
	_Safe::_M_swap(__x);
	_Base::swap(__x);
	}

	void
	clear() _GLIBCXX_NOEXCEPT
	{
	_Base::clear();
	this->_M_invalidate_all();
	}

	_Base&
	_M_base() _GLIBCXX_NOEXCEPT { return *this; }

	const _Base&
	_M_base() const _GLIBCXX_NOEXCEPT { return *this; }
	};

	#if __cpp_deduction_guides >= 201606
	template<typename _InputIterator, typename _ValT
	= typename iterator_traits<_InputIterator>::value_type,
	typename _Allocator = allocator<_ValT>,
	typename = _RequireInputIter<_InputIterator>,
	typename = _RequireAllocator<_Allocator>>
	deque(_InputIterator, _InputIterator, _Allocator = _Allocator())
	-> deque<_ValT, _Allocator>;
	#endif

	template<typename _Tp, typename _Alloc>
	inline bool
	operator==(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() == __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline bool
	operator!=(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() != __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline bool
	operator<(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() < __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline bool
	operator<=(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() <= __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline bool
	operator>=(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() >= __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline bool
	operator>(const deque<_Tp, _Alloc>& __lhs,
	const deque<_Tp, _Alloc>& __rhs)
	{ return __lhs._M_base() > __rhs._M_base(); }

	template<typename _Tp, typename _Alloc>
	inline void
	swap(deque<_Tp, _Alloc>& __lhs, deque<_Tp, _Alloc>& __rhs)
	_GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
	{ __lhs.swap(__rhs); }

	} // namespace __debug
	} // namespace std

	#endif