stl_bvector.h

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	  this->_M_impl._M_finish = std::copy(__position, end(), __i);
	  this->_M_deallocate();
	  this->_M_impl._M_end_of_storage = (__q + ((__len
						     + int(_S_word_bit) - 1)
						    / int(_S_word_bit)));
	  this->_M_impl._M_start = iterator(__q, 0);
	}
    }

    template<class _InputIterator>
      void
      _M_initialize_range(_InputIterator __first, _InputIterator __last,
			  std::input_iterator_tag)
      {
	this->_M_impl._M_start = iterator();
	this->_M_impl._M_finish = iterator();
	this->_M_impl._M_end_of_storage = 0;
	for (; __first != __last; ++__first)
	  push_back(*__first);
      }

    template<class _ForwardIterator>
      void
      _M_initialize_range(_ForwardIterator __first, _ForwardIterator __last,
			  std::forward_iterator_tag)
      {
	const size_type __n = std::distance(__first, __last);
	_M_initialize(__n);
	std::copy(__first, __last, this->_M_impl._M_start);
      }

    template<class _InputIterator>
      void
      _M_insert_range(iterator __pos, _InputIterator __first, 
		      _InputIterator __last, std::input_iterator_tag)
      {
	for (; __first != __last; ++__first)
	  {
	    __pos = insert(__pos, *__first);
	    ++__pos;
	  }
      }

    template<class _ForwardIterator>
      void
      _M_insert_range(iterator __position, _ForwardIterator __first, 
		      _ForwardIterator __last, std::forward_iterator_tag)
      {
	if (__first != __last)
	  {
	    size_type __n = std::distance(__first, __last);
	    if (capacity() - size() >= __n)
	      {
		std::copy_backward(__position, end(),
				   this->_M_impl._M_finish
				   + difference_type(__n));
		std::copy(__first, __last, __position);
		this->_M_impl._M_finish += difference_type(__n);
	      }
	    else
	      {
		const size_type __len = size() + std::max(size(), __n);
		_Bit_type * __q = this->_M_allocate(__len);
		iterator __i = std::copy(begin(), __position,
					 iterator(__q, 0));
		__i = std::copy(__first, __last, __i);
		this->_M_impl._M_finish = std::copy(__position, end(), __i);
		this->_M_deallocate();
		this->_M_impl._M_end_of_storage = (__q
						   + ((__len
						       + int(_S_word_bit) - 1)
						      / int(_S_word_bit)));
		this->_M_impl._M_start = iterator(__q, 0);
	      }
	  }
      }

  public:
    iterator
    begin()
    { return this->_M_impl._M_start; }

    const_iterator
    begin() const
    { return this->_M_impl._M_start; }

    iterator
    end()
    { return this->_M_impl._M_finish; }

    const_iterator
    end() const
    { return this->_M_impl._M_finish; }

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

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

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

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

    size_type
    size() const
    { return size_type(end() - begin()); }

    size_type
    max_size() const
    { return size_type(-1); }

    size_type
    capacity() const
    { return size_type(const_iterator(this->_M_impl._M_end_of_storage, 0)
		       - begin()); }
    bool
    empty() const
    { return begin() == end(); }

    reference
    operator[](size_type __n)
    { return *(begin() + difference_type(__n)); }

    const_reference
    operator[](size_type __n) const
    { return *(begin() + difference_type(__n)); }

    void
    _M_range_check(size_type __n) const
    {
      if (__n >= this->size())
        __throw_out_of_range(__N("vector<bool>::_M_range_check"));
    }

    reference
    at(size_type __n)
    { _M_range_check(__n); return (*this)[__n]; }

    const_reference
    at(size_type __n) const
    { _M_range_check(__n); return (*this)[__n]; }

    explicit
    vector(const allocator_type& __a = allocator_type())
    : _Bvector_base<_Alloc>(__a) { }

    vector(size_type __n, bool __value, 
	   const allocator_type& __a = allocator_type())
    : _Bvector_base<_Alloc>(__a)
    {
      _M_initialize(__n);
      std::fill(this->_M_impl._M_start._M_p, this->_M_impl._M_end_of_storage, 
		__value ? ~0 : 0);
    }

    explicit
    vector(size_type __n)
    : _Bvector_base<_Alloc>(allocator_type())
    {
      _M_initialize(__n);
      std::fill(this->_M_impl._M_start._M_p, 
		this->_M_impl._M_end_of_storage, 0);
    }

    vector(const vector& __x)
    : _Bvector_base<_Alloc>(__x.get_allocator())
    {
      _M_initialize(__x.size());
      std::copy(__x.begin(), __x.end(), this->_M_impl._M_start);
    }

    // Check whether it's an integral type.  If so, it's not an iterator.
    template<class _Integer>
      void
      _M_initialize_dispatch(_Integer __n, _Integer __x, __true_type)
      {
	_M_initialize(__n);
	std::fill(this->_M_impl._M_start._M_p, 
		  this->_M_impl._M_end_of_storage, __x ? ~0 : 0);
      }

    template<class _InputIterator>
      void 
      _M_initialize_dispatch(_InputIterator __first, _InputIterator __last,
			     __false_type)
      { _M_initialize_range(__first, __last, 
			    std::__iterator_category(__first)); }

    template<class _InputIterator>
      vector(_InputIterator __first, _InputIterator __last,
	     const allocator_type& __a = allocator_type())
      : _Bvector_base<_Alloc>(__a)
      {
	typedef typename std::__is_integer<_InputIterator>::__type _Integral;
	_M_initialize_dispatch(__first, __last, _Integral());
      }

    ~vector() { }

    vector&
    operator=(const vector& __x)
    {
      if (&__x == this)
	return *this;
      if (__x.size() > capacity())
	{
	  this->_M_deallocate();
	  _M_initialize(__x.size());
	}
      std::copy(__x.begin(), __x.end(), begin());
      this->_M_impl._M_finish = begin() + difference_type(__x.size());
      return *this;
    }

    // assign(), a generalized assignment member function.  Two
    // versions: one that takes a count, and one that takes a range.
    // The range version is a member template, so we dispatch on whether
    // or not the type is an integer.

    void
    _M_fill_assign(size_t __n, bool __x)
    {
      if (__n > size())
	{
	  std::fill(this->_M_impl._M_start._M_p, 
		    this->_M_impl._M_end_of_storage, __x ? ~0 : 0);
	  insert(end(), __n - size(), __x);
	}
      else
	{
	  erase(begin() + __n, end());
	  std::fill(this->_M_impl._M_start._M_p, 
		    this->_M_impl._M_end_of_storage, __x ? ~0 : 0);
	}
    }

    void
    assign(size_t __n, bool __x)
    { _M_fill_assign(__n, __x); }

    template<class _InputIterator>
      void
      assign(_InputIterator __first, _InputIterator __last)
      {
	typedef typename std::__is_integer<_InputIterator>::__type _Integral;
	_M_assign_dispatch(__first, __last, _Integral());
      }

    template<class _Integer>
      void
      _M_assign_dispatch(_Integer __n, _Integer __val, __true_type)
      { _M_fill_assign((size_t) __n, (bool) __val); }

    template<class _InputIterator>
      void
      _M_assign_dispatch(_InputIterator __first, _InputIterator __last,
			 __false_type)
      { _M_assign_aux(__first, __last, std::__iterator_category(__first)); }

    template<class _InputIterator>
      void
      _M_assign_aux(_InputIterator __first, _InputIterator __last,
		    std::input_iterator_tag)
      {
	iterator __cur = begin();
	for (; __first != __last && __cur != end(); ++__cur, ++__first)
	  *__cur = *__first;
	if (__first == __last)
	  erase(__cur, end());
	else
	  insert(end(), __first, __last);
      }
    
    template<class _ForwardIterator>
      void
      _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
		    std::forward_iterator_tag)
      {
	const size_type __len = std::distance(__first, __last);
	if (__len < size())
	  erase(std::copy(__first, __last, begin()), end());
	else
	  {
	    _ForwardIterator __mid = __first;
	    std::advance(__mid, size());
	    std::copy(__first, __mid, begin());
	    insert(end(), __mid, __last);
	  }
      }

    void
    reserve(size_type __n)
    {
      if (__n > this->max_size())
	__throw_length_error(__N("vector::reserve"));
      if (this->capacity() < __n)
	{
	  _Bit_type* __q = this->_M_allocate(__n);
	  this->_M_impl._M_finish = std::copy(begin(), end(), 
					      iterator(__q, 0));
	  this->_M_deallocate();
	  this->_M_impl._M_start = iterator(__q, 0);
	  this->_M_impl._M_end_of_storage = (__q + (__n + int(_S_word_bit) - 1)
					     / int(_S_word_bit));
	}
    }

    reference
    front()
    { return *begin(); }

    const_reference
    front() const
    { return *begin(); }

    reference
    back()
    { return *(end() - 1); }

    const_reference
    back() const
    { return *(end() - 1); }

    // _GLIBCXX_RESOLVE_LIB_DEFECTS
    // DR 464. Suggestion for new member functions in standard containers.
    // N.B. DR 464 says nothing about vector<bool> but we need something
    // here due to the way we are implementing DR 464 in the debug-mode
    // vector class.
    void
    data() { }

    void
    push_back(bool __x)
    {
      if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_of_storage)
        *this->_M_impl._M_finish++ = __x;
      else
        _M_insert_aux(end(), __x);
    }

    void
    swap(vector<bool, _Alloc>& __x)
    {
      std::swap(this->_M_impl._M_start, __x._M_impl._M_start);
      std::swap(this->_M_impl._M_finish, __x._M_impl._M_finish);
      std::swap(this->_M_impl._M_end_of_storage, 
		__x._M_impl._M_end_of_storage);
    }

    // [23.2.5]/1, third-to-last entry in synopsis listing
    static void
    swap(reference __x, reference __y)
    {
      bool __tmp = __x;
      __x = __y;
      __y = __tmp;
    }

    iterator
    insert(iterator __position, bool __x = bool())
    {
      const difference_type __n = __position - begin();
      if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_of_storage
	  && __position == end())
        *this->_M_impl._M_finish++ = __x;
      else
        _M_insert_aux(__position, __x);
      return begin() + __n;
    }

    // Check whether it's an integral type.  If so, it's not an iterator.

    template<class _Integer>
      void
      _M_insert_dispatch(iterator __pos, _Integer __n, _Integer __x,
			 __true_type)
      { _M_fill_insert(__pos, __n, __x); }

    template<class _InputIterator>
      void
      _M_insert_dispatch(iterator __pos,
			 _InputIterator __first, _InputIterator __last,
			 __false_type)
      { _M_insert_range(__pos, __first, __last,
			std::__iterator_category(__first)); }

    template<class _InputIterator>
      void
      insert(iterator __position,
	     _InputIterator __first, _InputIterator __last)
      {
	typedef typename std::__is_integer<_InputIterator>::__type _Integral;
	_M_insert_dispatch(__position, __first, __last, _Integral());
      }

    void
    _M_fill_insert(iterator __position, size_type __n, bool __x)
    {
      if (__n == 0)
	return;
      if (capacity() - size() >= __n)
	{
	  std::copy_backward(__position, end(),
			     this->_M_impl._M_finish + difference_type(__n));
	  std::fill(__position, __position + difference_type(__n), __x);
	  this->_M_impl._M_finish += difference_type(__n);
	}
      else
	{
	  const size_type __len = size() + std::max(size(), __n);
	  _Bit_type * __q = this->_M_allocate(__len);
	  iterator __i = std::copy(begin(), __position, iterator(__q, 0));
	  std::fill_n(__i, __n, __x);
	  this->_M_impl._M_finish = std::copy(__position, end(),
					      __i + difference_type(__n));
	  this->_M_deallocate();
	  this->_M_impl._M_end_of_storage = (__q + ((__len
						     + int(_S_word_bit) - 1)
						    / int(_S_word_bit)));
	  this->_M_impl._M_start = iterator(__q, 0);
	}
    }

    void
    insert(iterator __position, size_type __n, bool __x)
    { _M_fill_insert(__position, __n, __x); }

    void
    pop_back()
    { --this->_M_impl._M_finish; }

    iterator
    erase(iterator __position)
    {
      if (__position + 1 != end())
        std::copy(__position + 1, end(), __position);
      --this->_M_impl._M_finish;
      return __position;
    }

    iterator
    erase(iterator __first, iterator __last)
    {
      this->_M_impl._M_finish = std::copy(__last, end(), __first);
      return __first;
    }

    void
    resize(size_type __new_size, bool __x = bool())
    {
      if (__new_size < size())
        erase(begin() + difference_type(__new_size), end());
      else
        insert(end(), __new_size - size(), __x);
    }

    void
    flip()
    {
      for (_Bit_type * __p = this->_M_impl._M_start._M_p;
	   __p != this->_M_impl._M_end_of_storage; ++__p)
        *__p = ~*__p;
    }

    void
    clear()
    { erase(begin(), end()); }
  };
} // namespace std

#endif