git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119854 91177308-0d34-0410-b5e6-96231b3b80d8
		
			
				
	
	
		
			655 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			655 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
// -*- C++ -*-
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#ifndef _LIBCPP_SPLIT_BUFFER
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#define _LIBCPP_SPLIT_BUFFER
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#include <__config>
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#include <type_traits>
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#include <algorithm>
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#pragma GCC system_header
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <bool>
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class __split_buffer_common
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{
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protected:
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    void __throw_length_error() const;
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    void __throw_out_of_range() const;
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};
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template <class _Tp, class _Allocator = allocator<_Tp> >
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struct __split_buffer
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    : private __split_buffer_common<true>
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{
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private:
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    __split_buffer(const __split_buffer&);
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    __split_buffer& operator=(const __split_buffer&);
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public:
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    typedef _Tp                                             value_type;
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    typedef _Allocator                                      allocator_type;
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    typedef typename remove_reference<allocator_type>::type __alloc_rr;
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    typedef allocator_traits<__alloc_rr>                    __alloc_traits;
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    typedef value_type&                                     reference;
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    typedef const value_type&                               const_reference;
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    typedef typename __alloc_traits::size_type              size_type;
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    typedef typename __alloc_traits::difference_type        difference_type;
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    typedef typename __alloc_traits::pointer                pointer;
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    typedef typename __alloc_traits::const_pointer          const_pointer;
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    typedef pointer                                         iterator;
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    typedef const_pointer                                   const_iterator;
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    pointer                                         __first_;
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    pointer                                         __begin_;
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    pointer                                         __end_;
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    __compressed_pair<pointer, allocator_type> __end_cap_;
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    typedef typename add_lvalue_reference<allocator_type>::type __alloc_ref;
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    typedef typename add_lvalue_reference<allocator_type>::type __alloc_const_ref;
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    _LIBCPP_INLINE_VISIBILITY __alloc_rr&           __alloc()         {return __end_cap_.second();}
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    _LIBCPP_INLINE_VISIBILITY const __alloc_rr&     __alloc() const   {return __end_cap_.second();}
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    _LIBCPP_INLINE_VISIBILITY pointer&              __end_cap()       {return __end_cap_.first();}
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    _LIBCPP_INLINE_VISIBILITY const pointer&        __end_cap() const {return __end_cap_.first();}
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    __split_buffer();
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    explicit __split_buffer(__alloc_rr& __a);
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    explicit __split_buffer(const __alloc_rr& __a);
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    __split_buffer(size_type __cap, size_type __start, __alloc_rr& __a);
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    ~__split_buffer();
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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    __split_buffer(__split_buffer&& __c);
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    __split_buffer(__split_buffer&& __c, const __alloc_rr& __a);
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    __split_buffer& operator=(__split_buffer&& __c);
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#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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    _LIBCPP_INLINE_VISIBILITY       iterator begin()       {return __begin_;}
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    _LIBCPP_INLINE_VISIBILITY const_iterator begin() const {return __begin_;}
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    _LIBCPP_INLINE_VISIBILITY       iterator end()         {return __end_;}
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    _LIBCPP_INLINE_VISIBILITY const_iterator end() const   {return __end_;}
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    _LIBCPP_INLINE_VISIBILITY void clear() {__destruct_at_end(__begin_);}
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    _LIBCPP_INLINE_VISIBILITY size_type size() const {return static_cast<size_type>(__end_ - __begin_);}
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    _LIBCPP_INLINE_VISIBILITY bool empty()     const {return __end_ == __begin_;}
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    _LIBCPP_INLINE_VISIBILITY size_type capacity() const {return static_cast<size_type>(__end_cap() - __first_);}
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    _LIBCPP_INLINE_VISIBILITY size_type __front_spare() const {return static_cast<size_type>(__begin_ - __first_);}
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    _LIBCPP_INLINE_VISIBILITY size_type __back_spare() const {return static_cast<size_type>(__end_cap() - __end_);}
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    _LIBCPP_INLINE_VISIBILITY       reference front()       {return *__begin_;}
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    _LIBCPP_INLINE_VISIBILITY const_reference front() const {return *__begin_;}
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    _LIBCPP_INLINE_VISIBILITY       reference back()        {return *(__end_ - 1);}
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    _LIBCPP_INLINE_VISIBILITY const_reference back() const  {return *(__end_ - 1);}
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    void reserve(size_type __n);
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    void shrink_to_fit();
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    void push_front(const_reference __x);
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    void push_back(const_reference __x);
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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    void push_front(value_type&& __x);
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    void push_back(value_type&& __x);
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    template <class... _Args>
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        void emplace_back(_Args&&... __args);
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#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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    _LIBCPP_INLINE_VISIBILITY void pop_front() {__destruct_at_begin(__begin_+1);}
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    _LIBCPP_INLINE_VISIBILITY void pop_back() {__destruct_at_end(__end_-1);}
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    void __construct_at_end(size_type __n);
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        void __construct_at_end(size_type __n, false_type);
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        void __construct_at_end(size_type __n, true_type);
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    void __construct_at_end(size_type __n, const_reference __x);
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        void __construct_at_end(size_type __n, const_reference __x, false_type);
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        void __construct_at_end(size_type __n, const_reference __x, true_type);
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    template <class _InputIter>
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        typename enable_if
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        <
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            __is_input_iterator<_InputIter>::value &&
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           !__is_forward_iterator<_InputIter>::value,
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            void
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        >::type
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        __construct_at_end(_InputIter __first, _InputIter __last);
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    template <class _ForwardIterator>
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        typename enable_if
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        <
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            __is_forward_iterator<_ForwardIterator>::value,
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            void
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        >::type
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        __construct_at_end(_ForwardIterator __first, _ForwardIterator __last);
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    _LIBCPP_INLINE_VISIBILITY void __destruct_at_begin(pointer __new_begin)
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        {__destruct_at_begin(__new_begin, is_trivially_destructible<value_type>());}
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        void __destruct_at_begin(pointer __new_begin, false_type);
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        void __destruct_at_begin(pointer __new_begin, true_type);
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    _LIBCPP_INLINE_VISIBILITY void __destruct_at_end(pointer __new_last)
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        {__destruct_at_end(__new_last, is_trivially_destructible<value_type>());}
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        void __destruct_at_end(pointer __new_last, false_type);
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        void __destruct_at_end(pointer __new_last, true_type);
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    void swap(__split_buffer& __x);
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    bool __invariants() const;
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private:
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    _LIBCPP_INLINE_VISIBILITY
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    void __move_assign_alloc(const __split_buffer& __c, true_type)
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        {
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            __alloc() = _STD::move(__c.__alloc());
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        }
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    _LIBCPP_INLINE_VISIBILITY
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    void __move_assign_alloc(const __split_buffer& __c, false_type)
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        {}
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    _LIBCPP_INLINE_VISIBILITY
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    static void __swap_alloc(__alloc_rr& __x, __alloc_rr& __y)
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        {__swap_alloc(__x, __y, integral_constant<bool,
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                      __alloc_traits::propagate_on_container_swap::value>());}
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    _LIBCPP_INLINE_VISIBILITY
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    static void __swap_alloc(__alloc_rr& __x, __alloc_rr& __y, true_type)
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        {
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            using _STD::swap;
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            swap(__x, __y);
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        }
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    _LIBCPP_INLINE_VISIBILITY
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    static void __swap_alloc(__alloc_rr& __x, __alloc_rr& __y, false_type)
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        {}
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};
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template <class _Tp, class _Allocator>
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bool
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__split_buffer<_Tp, _Allocator>::__invariants() const
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{
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    if (__first_ == nullptr)
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    {
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        if (__begin_ != nullptr)
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            return false;
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        if (__end_ != nullptr)
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            return false;
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        if (__end_cap() != nullptr)
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            return false;
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    }
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    else
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    {
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        if (__begin_ < __first_)
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            return false;
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        if (__end_ < __begin_)
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            return false;
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        if (__end_cap() < __end_)
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            return false;
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    }
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    return true;
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}
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//  Default constructs __n objects starting at __end_
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//  throws if construction throws
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//  Precondition:  __n > 0
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//  Precondition:  size() + __n <= capacity()
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//  Postcondition:  size() == size() + __n
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n)
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{
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    __construct_at_end(__n, __is_zero_default_constructible<value_type>());
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}
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template <class _Tp, class _Allocator>
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, false_type)
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{
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    __alloc_rr& __a = this->__alloc();
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    do
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    {
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        __alloc_traits::construct(__a, _STD::__to_raw_pointer(this->__end_), value_type());
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        ++this->__end_;
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        --__n;
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    } while (__n > 0);
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, true_type)
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{
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    _STD::memset(this->__end_, 0, __n*sizeof(value_type));
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    this->__end_ += __n;
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}
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//  Copy constructs __n objects starting at __end_ from __x
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//  throws if construction throws
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//  Precondition:  __n > 0
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//  Precondition:  size() + __n <= capacity()
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//  Postcondition:  size() == old size() + __n
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//  Postcondition:  [i] == __x for all i in [size() - __n, __n)
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x)
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{
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    __construct_at_end(__n, __x, integral_constant<bool, is_trivially_copy_constructible<value_type>::value &&
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                                                         is_trivially_copy_assignable<value_type>::value>());
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}
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template <class _Tp, class _Allocator>
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x, false_type)
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{
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    __alloc_rr& __a = this->__alloc();
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    do
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    {
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        __alloc_traits::construct(__a, _STD::__to_raw_pointer(this->__end_), __x);
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        ++this->__end_;
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        --__n;
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    } while (__n > 0);
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x, true_type)
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{
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    _STD::fill_n(this->__end_, __n, __x);
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    this->__end_ += __n;
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}
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template <class _Tp, class _Allocator>
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template <class _InputIter>
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typename enable_if
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<
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     __is_input_iterator<_InputIter>::value &&
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    !__is_forward_iterator<_InputIter>::value,
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    void
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>::type
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__split_buffer<_Tp, _Allocator>::__construct_at_end(_InputIter __first, _InputIter __last)
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{
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    __alloc_rr& __a = this->__alloc();
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    for (; __first != __last; ++__first)
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    {
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        if (__end_ == __end_cap())
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        {
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            size_type __old_cap = __end_cap() - __first_;
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            size_type __new_cap = _STD::max<size_type>(2 * __old_cap, 8);
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            __split_buffer __buf(__new_cap, 0, __a);
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            for (pointer __p = __begin_; __p != __end_; ++__p, ++__buf.__end_)
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                __alloc_traits::construct(__buf.__alloc(),
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                        _STD::__to_raw_pointer(__buf.__end_), _STD::move(*__p));
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            swap(__buf);
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        }
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        __alloc_traits::construct(__a, _STD::__to_raw_pointer(this->__end_), *__first);
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        ++this->__end_;
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    }
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}
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template <class _Tp, class _Allocator>
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template <class _ForwardIterator>
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typename enable_if
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<
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    __is_forward_iterator<_ForwardIterator>::value,
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    void
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>::type
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__split_buffer<_Tp, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last)
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{
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    __alloc_rr& __a = this->__alloc();
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    for (; __first != __last; ++__first)
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    {
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        __alloc_traits::construct(__a, _STD::__to_raw_pointer(this->__end_), *__first);
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        ++this->__end_;
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    }
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, false_type)
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{
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    while (__begin_ < __new_begin)
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        __alloc_traits::destroy(__alloc(), __begin_++);
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, true_type)
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{
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    __begin_ = __new_begin;
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, false_type)
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{
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    while (__new_last < __end_)
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        __alloc_traits::destroy(__alloc(), --__end_);
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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void
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__split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, true_type)
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{
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    __end_ = __new_last;
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}
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template <class _Tp, class _Allocator>
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__split_buffer<_Tp, _Allocator>::__split_buffer(size_type __cap, size_type __start, __alloc_rr& __a)
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    : __end_cap_(0, __a)
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{
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    __first_ = __cap != 0 ? __alloc_traits::allocate(__alloc(), __cap) : nullptr;
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    __begin_ = __end_ = __first_ + __start;
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    __end_cap() = __first_ + __cap;
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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__split_buffer<_Tp, _Allocator>::__split_buffer()
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    : __first_(0), __begin_(0), __end_(0), __end_cap_(0)
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{
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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__split_buffer<_Tp, _Allocator>::__split_buffer(__alloc_rr& __a)
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    : __first_(0), __begin_(0), __end_(0), __end_cap_(0, __a)
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{
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}
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template <class _Tp, class _Allocator>
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_LIBCPP_INLINE_VISIBILITY inline
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__split_buffer<_Tp, _Allocator>::__split_buffer(const __alloc_rr& __a)
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    : __first_(0), __begin_(0), __end_(0), __end_cap_(0, __a)
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{
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}
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template <class _Tp, class _Allocator>
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__split_buffer<_Tp, _Allocator>::~__split_buffer()
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{
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    clear();
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    if (__first_)
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        __alloc_traits::deallocate(__alloc(), __first_, capacity());
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}
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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template <class _Tp, class _Allocator>
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__split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c)
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    : __first_(_STD::move(__c.__first_)),
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      __begin_(_STD::move(__c.__begin_)),
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      __end_(_STD::move(__c.__end_)),
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      __end_cap_(_STD::move(__c.__end_cap_))
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{
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    __c.__first_ = nullptr;
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    __c.__begin_ = nullptr;
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    __c.__end_ = nullptr;
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    __c.__end_cap() = nullptr;
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}
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template <class _Tp, class _Allocator>
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__split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c, const __alloc_rr& __a)
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    : __end_cap_(__a)
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{
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    if (__a == __c.__alloc())
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    {
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        __first_ = __c.__first_;
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        __begin_ = __c.__begin_;
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        __end_ = __c.__end_;
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						|
        __end_cap() = __c.__end_cap();
 | 
						|
        __c.__first_ = nullptr;
 | 
						|
        __c.__begin_ = nullptr;
 | 
						|
        __c.__end_ = nullptr;
 | 
						|
        __c.__end_cap() = nullptr;
 | 
						|
    }
 | 
						|
    else
 | 
						|
    {
 | 
						|
        size_type __cap = __c.size();
 | 
						|
        __first_ = __alloc_traits::allocate(__alloc(), __cap);
 | 
						|
        __begin_ = __end_ = __first_;
 | 
						|
        __end_cap() = __first_ + __cap;
 | 
						|
        typedef move_iterator<iterator> _I;
 | 
						|
        __construct_at_end(_I(__c.begin()), _I(__c.end()));
 | 
						|
    }
 | 
						|
}
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
__split_buffer<_Tp, _Allocator>&
 | 
						|
__split_buffer<_Tp, _Allocator>::operator=(__split_buffer&& __c)
 | 
						|
{
 | 
						|
    clear();
 | 
						|
    shrink_to_fit();
 | 
						|
    __first_ = __c.__first_;
 | 
						|
    __begin_ = __c.__begin_;
 | 
						|
    __end_ = __c.__end_;
 | 
						|
    __end_cap() = __c.__end_cap();
 | 
						|
    __move_assign_alloc(__c,
 | 
						|
        integral_constant<bool,
 | 
						|
                          __alloc_traits::propagate_on_container_move_assignment::value>());
 | 
						|
    __c.__first_ = __c.__begin_ = __c.__end_ = __c.__end_cap() = nullptr;
 | 
						|
    return *this;
 | 
						|
}
 | 
						|
 | 
						|
#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::swap(__split_buffer& __x)
 | 
						|
{
 | 
						|
    _STD::swap(__first_, __x.__first_);
 | 
						|
    _STD::swap(__begin_, __x.__begin_);
 | 
						|
    _STD::swap(__end_, __x.__end_);
 | 
						|
    _STD::swap(__end_cap(), __x.__end_cap());
 | 
						|
    __swap_alloc(__alloc(), __x.__alloc());
 | 
						|
}
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::reserve(size_type __n)
 | 
						|
{
 | 
						|
    if (__n < capacity())
 | 
						|
    {
 | 
						|
        __split_buffer<value_type, __alloc_rr&> __t(__n, 0, __alloc());
 | 
						|
        __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                               move_iterator<pointer>(__end_));
 | 
						|
        _STD::swap(__first_, __t.__first_);
 | 
						|
        _STD::swap(__begin_, __t.__begin_);
 | 
						|
        _STD::swap(__end_, __t.__end_);
 | 
						|
        _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
    }
 | 
						|
}
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::shrink_to_fit()
 | 
						|
{
 | 
						|
    if (capacity() > size())
 | 
						|
    {
 | 
						|
#ifndef _LIBCPP_NO_EXCEPTIONS
 | 
						|
        try
 | 
						|
        {
 | 
						|
#endif  // _LIBCPP_NO_EXCEPTIONS
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(size(), 0, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            __t.__end_ = __t.__begin_ + (__end_ - __begin_);
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
#ifndef _LIBCPP_NO_EXCEPTIONS
 | 
						|
        }
 | 
						|
        catch (...)
 | 
						|
        {
 | 
						|
        }
 | 
						|
#endif  // _LIBCPP_NO_EXCEPTIONS
 | 
						|
    }
 | 
						|
}
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::push_front(const_reference __x)
 | 
						|
{
 | 
						|
    if (__begin_ == __first_)
 | 
						|
    {
 | 
						|
        if (__end_ < __end_cap())
 | 
						|
        {
 | 
						|
            difference_type __d = __end_cap() - __end_;
 | 
						|
            __d = (__d + 1) / 2;
 | 
						|
            __begin_ = _STD::move_backward(__begin_, __end_, __end_ + __d);
 | 
						|
            __end_ += __d;
 | 
						|
        }
 | 
						|
        else
 | 
						|
        {
 | 
						|
            size_type __c = max<size_type>(2 * (__end_cap() - __first_), 1);
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
        }
 | 
						|
    }
 | 
						|
    __alloc_traits::construct(__alloc(), _STD::__to_raw_pointer(__begin_-1), __x);
 | 
						|
    --__begin_;
 | 
						|
}
 | 
						|
 | 
						|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::push_front(value_type&& __x)
 | 
						|
{
 | 
						|
    if (__begin_ == __first_)
 | 
						|
    {
 | 
						|
        if (__end_ < __end_cap())
 | 
						|
        {
 | 
						|
            difference_type __d = __end_cap() - __end_;
 | 
						|
            __d = (__d + 1) / 2;
 | 
						|
            __begin_ = _STD::move_backward(__begin_, __end_, __end_ + __d);
 | 
						|
            __end_ += __d;
 | 
						|
        }
 | 
						|
        else
 | 
						|
        {
 | 
						|
            size_type __c = max<size_type>(2 * (__end_cap() - __first_), 1);
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
        }
 | 
						|
    }
 | 
						|
    __alloc_traits::construct(__alloc(), _STD::__to_raw_pointer(__begin_-1),
 | 
						|
            _STD::move(__x));
 | 
						|
    --__begin_;
 | 
						|
}
 | 
						|
 | 
						|
#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
_LIBCPP_INLINE_VISIBILITY inline
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::push_back(const_reference __x)
 | 
						|
{
 | 
						|
    if (__end_ == __end_cap())
 | 
						|
    {
 | 
						|
        if (__begin_ > __first_)
 | 
						|
        {
 | 
						|
            difference_type __d = __begin_ - __first_;
 | 
						|
            __d = (__d + 1) / 2;
 | 
						|
            __end_ = _STD::move(__begin_, __end_, __begin_ - __d);
 | 
						|
            __begin_ -= __d;
 | 
						|
        }
 | 
						|
        else
 | 
						|
        {
 | 
						|
            size_type __c = max<size_type>(2 * (__end_cap() - __first_), 1);
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
        }
 | 
						|
    }
 | 
						|
    __alloc_traits::construct(__alloc(), _STD::__to_raw_pointer(__end_), __x);
 | 
						|
    ++__end_;
 | 
						|
}
 | 
						|
 | 
						|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::push_back(value_type&& __x)
 | 
						|
{
 | 
						|
    if (__end_ == __end_cap())
 | 
						|
    {
 | 
						|
        if (__begin_ > __first_)
 | 
						|
        {
 | 
						|
            difference_type __d = __begin_ - __first_;
 | 
						|
            __d = (__d + 1) / 2;
 | 
						|
            __end_ = _STD::move(__begin_, __end_, __begin_ - __d);
 | 
						|
            __begin_ -= __d;
 | 
						|
        }
 | 
						|
        else
 | 
						|
        {
 | 
						|
            size_type __c = max<size_type>(2 * (__end_cap() - __first_), 1);
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
        }
 | 
						|
    }
 | 
						|
    __alloc_traits::construct(__alloc(), _STD::__to_raw_pointer(__end_),
 | 
						|
            _STD::move(__x));
 | 
						|
    ++__end_;
 | 
						|
}
 | 
						|
 | 
						|
#ifndef _LIBCPP_HAS_NO_VARIADICS
 | 
						|
 | 
						|
template <class _Tp, class _Allocator>
 | 
						|
template <class... _Args>
 | 
						|
void
 | 
						|
__split_buffer<_Tp, _Allocator>::emplace_back(_Args&&... __args)
 | 
						|
{
 | 
						|
    if (__end_ == __end_cap())
 | 
						|
    {
 | 
						|
        if (__begin_ > __first_)
 | 
						|
        {
 | 
						|
            difference_type __d = __begin_ - __first_;
 | 
						|
            __d = (__d + 1) / 2;
 | 
						|
            __end_ = _STD::move(__begin_, __end_, __begin_ - __d);
 | 
						|
            __begin_ -= __d;
 | 
						|
        }
 | 
						|
        else
 | 
						|
        {
 | 
						|
            size_type __c = max<size_type>(2 * (__end_cap() - __first_), 1);
 | 
						|
            __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
 | 
						|
            __t.__construct_at_end(move_iterator<pointer>(__begin_),
 | 
						|
                                   move_iterator<pointer>(__end_));
 | 
						|
            _STD::swap(__first_, __t.__first_);
 | 
						|
            _STD::swap(__begin_, __t.__begin_);
 | 
						|
            _STD::swap(__end_, __t.__end_);
 | 
						|
            _STD::swap(__end_cap(), __t.__end_cap());
 | 
						|
        }
 | 
						|
    }
 | 
						|
    __alloc_traits::construct(__alloc(), _STD::__to_raw_pointer(__end_),
 | 
						|
                              _STD::forward<_Args>(__args)...);
 | 
						|
    ++__end_;
 | 
						|
}
 | 
						|
 | 
						|
#endif  // _LIBCPP_HAS_NO_VARIADICS
 | 
						|
 | 
						|
#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 | 
						|
 | 
						|
_LIBCPP_END_NAMESPACE_STD
 | 
						|
 | 
						|
#endif  // _LIBCPP_SPLIT_BUFFER
 |