vector.tcc

Go to the documentation of this file.

// Vector implementation (out of line) -*- C++ -*-

// Copyright (C) 2001-2018 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/>.

/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this  software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/** @file bits/vector.tcc
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{vector}
 */

#ifndef _VECTOR_TCC
#define _VECTOR_TCC 1

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
_GLIBCXX_BEGIN_NAMESPACE_CONTAINER

  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    reserve(size_type __n)
    {
      if (__n > this->max_size())
        __throw_length_error(__N("vector::reserve"));
      if (this->capacity() < __n)
        {
          const size_type __old_size = size();
          pointer __tmp = _M_allocate_and_copy(__n,
            _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_start),
            _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_finish));
          _GLIBCXX_ASAN_ANNOTATE_REINIT;
          std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                        _M_get_Tp_allocator());
          _M_deallocate(this->_M_impl._M_start,
                        this->_M_impl._M_end_of_storage
                        - this->_M_impl._M_start);
          this->_M_impl._M_start = __tmp;
          this->_M_impl._M_finish = __tmp + __old_size;
          this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
        }
    }

#if __cplusplus >= 201103L
  template<typename _Tp, typename _Alloc>
    template<typename... _Args>
#if __cplusplus > 201402L
      typename vector<_Tp, _Alloc>::reference
#else
      void
#endif
      vector<_Tp, _Alloc>::
      emplace_back(_Args&&... __args)
      {
        if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
          {
            _GLIBCXX_ASAN_ANNOTATE_GROW(1);
            _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                                     std::forward<_Args>(__args)...);
            ++this->_M_impl._M_finish;
            _GLIBCXX_ASAN_ANNOTATE_GREW(1);
          }
        else
          _M_realloc_insert(end(), std::forward<_Args>(__args)...);
#if __cplusplus > 201402L
        return back();
#endif
      }
#endif

  template<typename _Tp, typename _Alloc>
    typename vector<_Tp, _Alloc>::iterator
    vector<_Tp, _Alloc>::
#if __cplusplus >= 201103L
    insert(const_iterator __position, const value_type& __x)
#else
    insert(iterator __position, const value_type& __x)
#endif
    {
      const size_type __n = __position - begin();
      if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
        if (__position == end())
          {
            _GLIBCXX_ASAN_ANNOTATE_GROW(1);
            _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                                     __x);
            ++this->_M_impl._M_finish;
            _GLIBCXX_ASAN_ANNOTATE_GREW(1);
          }
        else
          {
#if __cplusplus >= 201103L
            const auto __pos = begin() + (__position - cbegin());
            // __x could be an existing element of this vector, so make a
            // copy of it before _M_insert_aux moves elements around.
            _Temporary_value __x_copy(this, __x);
            _M_insert_aux(__pos, std::move(__x_copy._M_val()));
#else
            _M_insert_aux(__position, __x);
#endif
          }
      else
#if __cplusplus >= 201103L
        _M_realloc_insert(begin() + (__position - cbegin()), __x);
#else
        _M_realloc_insert(__position, __x);
#endif

      return iterator(this->_M_impl._M_start + __n);
    }

  template<typename _Tp, typename _Alloc>
    typename vector<_Tp, _Alloc>::iterator
    vector<_Tp, _Alloc>::
    _M_erase(iterator __position)
    {
      if (__position + 1 != end())
        _GLIBCXX_MOVE3(__position + 1, end(), __position);
      --this->_M_impl._M_finish;
      _Alloc_traits::destroy(this->_M_impl, this->_M_impl._M_finish);
      _GLIBCXX_ASAN_ANNOTATE_SHRINK(1);
      return __position;
    }

  template<typename _Tp, typename _Alloc>
    typename vector<_Tp, _Alloc>::iterator
    vector<_Tp, _Alloc>::
    _M_erase(iterator __first, iterator __last)
    {
      if (__first != __last)
        {
          if (__last != end())
            _GLIBCXX_MOVE3(__last, end(), __first);
          _M_erase_at_end(__first.base() + (end() - __last));
        }
      return __first;
    }

  template<typename _Tp, typename _Alloc>
    vector<_Tp, _Alloc>&
    vector<_Tp, _Alloc>::
    operator=(const vector<_Tp, _Alloc>& __x)
    {
      if (&__x != this)
        {
          _GLIBCXX_ASAN_ANNOTATE_REINIT;
#if __cplusplus >= 201103L
          if (_Alloc_traits::_S_propagate_on_copy_assign())
            {
              if (!_Alloc_traits::_S_always_equal()
                  && _M_get_Tp_allocator() != __x._M_get_Tp_allocator())
                {
                  // replacement allocator cannot free existing storage
                  this->clear();
                  _M_deallocate(this->_M_impl._M_start,
                                this->_M_impl._M_end_of_storage
                                - this->_M_impl._M_start);
                  this->_M_impl._M_start = nullptr;
                  this->_M_impl._M_finish = nullptr;
                  this->_M_impl._M_end_of_storage = nullptr;
                }
              std::__alloc_on_copy(_M_get_Tp_allocator(),
                                   __x._M_get_Tp_allocator());
            }
#endif
          const size_type __xlen = __x.size();
          if (__xlen > capacity())
            {
              pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(),
                                                   __x.end());
              std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                            _M_get_Tp_allocator());
              _M_deallocate(this->_M_impl._M_start,
                            this->_M_impl._M_end_of_storage
                            - this->_M_impl._M_start);
              this->_M_impl._M_start = __tmp;
              this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __xlen;
            }
          else if (size() >= __xlen)
            {
              std::_Destroy(std::copy(__x.begin(), __x.end(), begin()),
                            end(), _M_get_Tp_allocator());
            }
          else
            {
              std::copy(__x._M_impl._M_start, __x._M_impl._M_start + size(),
                        this->_M_impl._M_start);
              std::__uninitialized_copy_a(__x._M_impl._M_start + size(),
                                          __x._M_impl._M_finish,
                                          this->_M_impl._M_finish,
                                          _M_get_Tp_allocator());
            }
          this->_M_impl._M_finish = this->_M_impl._M_start + __xlen;
        }
      return *this;
    }

  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_fill_assign(size_t __n, const value_type& __val)
    {
      if (__n > capacity())
        {
          vector __tmp(__n, __val, _M_get_Tp_allocator());
          __tmp._M_impl._M_swap_data(this->_M_impl);
        }
      else if (__n > size())
        {
          std::fill(begin(), end(), __val);
          const size_type __add = __n - size();
          _GLIBCXX_ASAN_ANNOTATE_GROW(__add);
          this->_M_impl._M_finish =
            std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
                                          __add, __val, _M_get_Tp_allocator());
          _GLIBCXX_ASAN_ANNOTATE_GREW(__add);
        }
      else
        _M_erase_at_end(std::fill_n(this->_M_impl._M_start, __n, __val));
    }

  template<typename _Tp, typename _Alloc>
    template<typename _InputIterator>
      void
      vector<_Tp, _Alloc>::
      _M_assign_aux(_InputIterator __first, _InputIterator __last,
                    std::input_iterator_tag)
      {
        pointer __cur(this->_M_impl._M_start);
        for (; __first != __last && __cur != this->_M_impl._M_finish;
             ++__cur, ++__first)
          *__cur = *__first;
        if (__first == __last)
          _M_erase_at_end(__cur);
        else
          _M_range_insert(end(), __first, __last,
                          std::__iterator_category(__first));
      }

  template<typename _Tp, typename _Alloc>
    template<typename _ForwardIterator>
      void
      vector<_Tp, _Alloc>::
      _M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
                    std::forward_iterator_tag)
      {
        const size_type __len = std::distance(__first, __last);

        if (__len > capacity())
          {
            pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
            _GLIBCXX_ASAN_ANNOTATE_REINIT;
            std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                          _M_get_Tp_allocator());
            _M_deallocate(this->_M_impl._M_start,
                          this->_M_impl._M_end_of_storage
                          - this->_M_impl._M_start);
            this->_M_impl._M_start = __tmp;
            this->_M_impl._M_finish = this->_M_impl._M_start + __len;
            this->_M_impl._M_end_of_storage = this->_M_impl._M_finish;
          }
        else if (size() >= __len)
          _M_erase_at_end(std::copy(__first, __last, this->_M_impl._M_start));
        else
          {
            _ForwardIterator __mid = __first;
            std::advance(__mid, size());
            std::copy(__first, __mid, this->_M_impl._M_start);
            const size_type __attribute__((__unused__)) __n = __len - size();
            _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
            this->_M_impl._M_finish =
              std::__uninitialized_copy_a(__mid, __last,
                                          this->_M_impl._M_finish,
                                          _M_get_Tp_allocator());
            _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
          }
      }

#if __cplusplus >= 201103L
  template<typename _Tp, typename _Alloc>
    auto
    vector<_Tp, _Alloc>::
    _M_insert_rval(const_iterator __position, value_type&& __v) -> iterator
    {
      const auto __n = __position - cbegin();
      if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
        if (__position == cend())
          {
            _GLIBCXX_ASAN_ANNOTATE_GROW(1);
            _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                                     std::move(__v));
            ++this->_M_impl._M_finish;
            _GLIBCXX_ASAN_ANNOTATE_GREW(1);
          }
        else
          _M_insert_aux(begin() + __n, std::move(__v));
      else
        _M_realloc_insert(begin() + __n, std::move(__v));

      return iterator(this->_M_impl._M_start + __n);
    }

  template<typename _Tp, typename _Alloc>
    template<typename... _Args>
      auto
      vector<_Tp, _Alloc>::
      _M_emplace_aux(const_iterator __position, _Args&&... __args)
      -> iterator
      {
        const auto __n = __position - cbegin();
        if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
          if (__position == cend())
            {
              _GLIBCXX_ASAN_ANNOTATE_GROW(1);
              _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                                       std::forward<_Args>(__args)...);
              ++this->_M_impl._M_finish;
              _GLIBCXX_ASAN_ANNOTATE_GREW(1);
            }
          else
            {
              // We need to construct a temporary because something in __args...
              // could alias one of the elements of the container and so we
              // need to use it before _M_insert_aux moves elements around.
              _Temporary_value __tmp(this, std::forward<_Args>(__args)...);
              _M_insert_aux(begin() + __n, std::move(__tmp._M_val()));
            }
        else
          _M_realloc_insert(begin() + __n, std::forward<_Args>(__args)...);

        return iterator(this->_M_impl._M_start + __n);
      }

  template<typename _Tp, typename _Alloc>
    template<typename _Arg>
      void
      vector<_Tp, _Alloc>::
      _M_insert_aux(iterator __position, _Arg&& __arg)
#else
  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_insert_aux(iterator __position, const _Tp& __x)
#endif
    {
      _GLIBCXX_ASAN_ANNOTATE_GROW(1);
      _Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
                               _GLIBCXX_MOVE(*(this->_M_impl._M_finish - 1)));
      ++this->_M_impl._M_finish;
      _GLIBCXX_ASAN_ANNOTATE_GREW(1);
#if __cplusplus < 201103L
      _Tp __x_copy = __x;
#endif
      _GLIBCXX_MOVE_BACKWARD3(__position.base(),
                              this->_M_impl._M_finish - 2,
                              this->_M_impl._M_finish - 1);
#if __cplusplus < 201103L
      *__position = __x_copy;
#else
      *__position = std::forward<_Arg>(__arg);
#endif
    }

#if __cplusplus >= 201103L
  template<typename _Tp, typename _Alloc>
    template<typename... _Args>
      void
      vector<_Tp, _Alloc>::
      _M_realloc_insert(iterator __position, _Args&&... __args)
#else
  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_realloc_insert(iterator __position, const _Tp& __x)
#endif
    {
      const size_type __len =
        _M_check_len(size_type(1), "vector::_M_realloc_insert");
      pointer __old_start = this->_M_impl._M_start;
      pointer __old_finish = this->_M_impl._M_finish;
      const size_type __elems_before = __position - begin();
      pointer __new_start(this->_M_allocate(__len));
      pointer __new_finish(__new_start);
      __try
        {
          // The order of the three operations is dictated by the C++11
          // case, where the moves could alter a new element belonging
          // to the existing vector.  This is an issue only for callers
          // taking the element by lvalue ref (see last bullet of C++11
          // [res.on.arguments]).
          _Alloc_traits::construct(this->_M_impl,
                                   __new_start + __elems_before,
#if __cplusplus >= 201103L
                                   std::forward<_Args>(__args)...);
#else
                                   __x);
#endif
          __new_finish = pointer();

          __new_finish
            = std::__uninitialized_move_if_noexcept_a
            (__old_start, __position.base(),
             __new_start, _M_get_Tp_allocator());

          ++__new_finish;

          __new_finish
            = std::__uninitialized_move_if_noexcept_a
            (__position.base(), __old_finish,
             __new_finish, _M_get_Tp_allocator());
        }
      __catch(...)
        {
          if (!__new_finish)
            _Alloc_traits::destroy(this->_M_impl,
                                   __new_start + __elems_before);
          else
            std::_Destroy(__new_start, __new_finish, _M_get_Tp_allocator());
          _M_deallocate(__new_start, __len);
          __throw_exception_again;
        }
      _GLIBCXX_ASAN_ANNOTATE_REINIT;
      std::_Destroy(__old_start, __old_finish, _M_get_Tp_allocator());
      _M_deallocate(__old_start,
                    this->_M_impl._M_end_of_storage - __old_start);
      this->_M_impl._M_start = __new_start;
      this->_M_impl._M_finish = __new_finish;
      this->_M_impl._M_end_of_storage = __new_start + __len;
    }

  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_fill_insert(iterator __position, size_type __n, const value_type& __x)
    {
      if (__n != 0)
        {
          if (size_type(this->_M_impl._M_end_of_storage
                        - this->_M_impl._M_finish) >= __n)
            {
#if __cplusplus < 201103L
              value_type __x_copy = __x;
#else
              _Temporary_value __tmp(this, __x);
              value_type& __x_copy = __tmp._M_val();
#endif
              const size_type __elems_after = end() - __position;
              pointer __old_finish(this->_M_impl._M_finish);
              if (__elems_after > __n)
                {
                  _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
                  std::__uninitialized_move_a(this->_M_impl._M_finish - __n,
                                              this->_M_impl._M_finish,
                                              this->_M_impl._M_finish,
                                              _M_get_Tp_allocator());
                  this->_M_impl._M_finish += __n;
                  _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
                  _GLIBCXX_MOVE_BACKWARD3(__position.base(),
                                          __old_finish - __n, __old_finish);
                  std::fill(__position.base(), __position.base() + __n,
                            __x_copy);
                }
              else
                {
                  _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
                  this->_M_impl._M_finish =
                    std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
                                                  __n - __elems_after,
                                                  __x_copy,
                                                  _M_get_Tp_allocator());
                  _GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
                  std::__uninitialized_move_a(__position.base(), __old_finish,
                                              this->_M_impl._M_finish,
                                              _M_get_Tp_allocator());
                  this->_M_impl._M_finish += __elems_after;
                  _GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
                  std::fill(__position.base(), __old_finish, __x_copy);
                }
            }
          else
            {
              const size_type __len =
                _M_check_len(__n, "vector::_M_fill_insert");
              const size_type __elems_before = __position - begin();
              pointer __new_start(this->_M_allocate(__len));
              pointer __new_finish(__new_start);
              __try
                {
                  // See _M_realloc_insert above.
                  std::__uninitialized_fill_n_a(__new_start + __elems_before,
                                                __n, __x,
                                                _M_get_Tp_allocator());
                  __new_finish = pointer();

                  __new_finish
                    = std::__uninitialized_move_if_noexcept_a
                    (this->_M_impl._M_start, __position.base(),
                     __new_start, _M_get_Tp_allocator());

                  __new_finish += __n;

                  __new_finish
                    = std::__uninitialized_move_if_noexcept_a
                    (__position.base(), this->_M_impl._M_finish,
                     __new_finish, _M_get_Tp_allocator());
                }
              __catch(...)
                {
                  if (!__new_finish)
                    std::_Destroy(__new_start + __elems_before,
                                  __new_start + __elems_before + __n,
                                  _M_get_Tp_allocator());
                  else
                    std::_Destroy(__new_start, __new_finish,
                                  _M_get_Tp_allocator());
                  _M_deallocate(__new_start, __len);
                  __throw_exception_again;
                }
              _GLIBCXX_ASAN_ANNOTATE_REINIT;
              std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                            _M_get_Tp_allocator());
              _M_deallocate(this->_M_impl._M_start,
                            this->_M_impl._M_end_of_storage
                            - this->_M_impl._M_start);
              this->_M_impl._M_start = __new_start;
              this->_M_impl._M_finish = __new_finish;
              this->_M_impl._M_end_of_storage = __new_start + __len;
            }
        }
    }

#if __cplusplus >= 201103L
  template<typename _Tp, typename _Alloc>
    void
    vector<_Tp, _Alloc>::
    _M_default_append(size_type __n)
    {
      if (__n != 0)
        {
          const size_type __size = size();
          size_type __navail = size_type(this->_M_impl._M_end_of_storage
                                         - this->_M_impl._M_finish);

          if (__size > max_size() || __navail > max_size() - __size)
            __builtin_unreachable();

          if (__navail >= __n)
            {
              _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
              this->_M_impl._M_finish =
                std::__uninitialized_default_n_a(this->_M_impl._M_finish,
                                                 __n, _M_get_Tp_allocator());
              _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
            }
          else
            {
              const size_type __len =
                _M_check_len(__n, "vector::_M_default_append");
              pointer __new_start(this->_M_allocate(__len));
              pointer __destroy_from = pointer();
              __try
                {
                  std::__uninitialized_default_n_a(__new_start + __size,
                                                   __n, _M_get_Tp_allocator());
                  __destroy_from = __new_start + __size;
                  std::__uninitialized_move_if_noexcept_a(
                      this->_M_impl._M_start, this->_M_impl._M_finish,
                      __new_start, _M_get_Tp_allocator());
                }
              __catch(...)
                {
                  if (__destroy_from)
                    std::_Destroy(__destroy_from, __destroy_from + __n,
                                  _M_get_Tp_allocator());
                  _M_deallocate(__new_start, __len);
                  __throw_exception_again;
                }
              _GLIBCXX_ASAN_ANNOTATE_REINIT;
              std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                            _M_get_Tp_allocator());
              _M_deallocate(this->_M_impl._M_start,
                            this->_M_impl._M_end_of_storage
                            - this->_M_impl._M_start);
              this->_M_impl._M_start = __new_start;
              this->_M_impl._M_finish = __new_start + __size + __n;
              this->_M_impl._M_end_of_storage = __new_start + __len;
            }
        }
    }

  template<typename _Tp, typename _Alloc>
    bool
    vector<_Tp, _Alloc>::
    _M_shrink_to_fit()
    {
      if (capacity() == size())
        return false;
      _GLIBCXX_ASAN_ANNOTATE_REINIT;
      return std::__shrink_to_fit_aux<vector>::_S_do_it(*this);
    }
#endif

  template<typename _Tp, typename _Alloc>
    template<typename _InputIterator>
      void
      vector<_Tp, _Alloc>::
      _M_range_insert(iterator __pos, _InputIterator __first,
                      _InputIterator __last, std::input_iterator_tag)
      {
        if (__pos == end())
          {
            for (; __first != __last; ++__first)
              insert(end(), *__first);
          }
        else if (__first != __last)
          {
            vector __tmp(__first, __last, _M_get_Tp_allocator());
            insert(__pos,
                   _GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.begin()),
                   _GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.end()));
          }
      }

  template<typename _Tp, typename _Alloc>
    template<typename _ForwardIterator>
      void
      vector<_Tp, _Alloc>::
      _M_range_insert(iterator __position, _ForwardIterator __first,
                      _ForwardIterator __last, std::forward_iterator_tag)
      {
        if (__first != __last)
          {
            const size_type __n = std::distance(__first, __last);
            if (size_type(this->_M_impl._M_end_of_storage
                          - this->_M_impl._M_finish) >= __n)
              {
                const size_type __elems_after = end() - __position;
                pointer __old_finish(this->_M_impl._M_finish);
                if (__elems_after > __n)
                  {
                    _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
                    std::__uninitialized_move_a(this->_M_impl._M_finish - __n,
                                                this->_M_impl._M_finish,
                                                this->_M_impl._M_finish,
                                                _M_get_Tp_allocator());
                    this->_M_impl._M_finish += __n;
                    _GLIBCXX_ASAN_ANNOTATE_GREW(__n);
                    _GLIBCXX_MOVE_BACKWARD3(__position.base(),
                                            __old_finish - __n, __old_finish);
                    std::copy(__first, __last, __position);
                  }
                else
                  {
                    _ForwardIterator __mid = __first;
                    std::advance(__mid, __elems_after);
                    _GLIBCXX_ASAN_ANNOTATE_GROW(__n);
                    std::__uninitialized_copy_a(__mid, __last,
                                                this->_M_impl._M_finish,
                                                _M_get_Tp_allocator());
                    this->_M_impl._M_finish += __n - __elems_after;
                    _GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
                    std::__uninitialized_move_a(__position.base(),
                                                __old_finish,
                                                this->_M_impl._M_finish,
                                                _M_get_Tp_allocator());
                    this->_M_impl._M_finish += __elems_after;
                    _GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
                    std::copy(__first, __mid, __position);
                  }
              }
            else
              {
                const size_type __len =
                  _M_check_len(__n, "vector::_M_range_insert");
                pointer __new_start(this->_M_allocate(__len));
                pointer __new_finish(__new_start);
                __try
                  {
                    __new_finish
                      = std::__uninitialized_move_if_noexcept_a
                      (this->_M_impl._M_start, __position.base(),
                       __new_start, _M_get_Tp_allocator());
                    __new_finish
                      = std::__uninitialized_copy_a(__first, __last,
                                                    __new_finish,
                                                    _M_get_Tp_allocator());
                    __new_finish
                      = std::__uninitialized_move_if_noexcept_a
                      (__position.base(), this->_M_impl._M_finish,
                       __new_finish, _M_get_Tp_allocator());
                  }
                __catch(...)
                  {
                    std::_Destroy(__new_start, __new_finish,
                                  _M_get_Tp_allocator());
                    _M_deallocate(__new_start, __len);
                    __throw_exception_again;
                  }
                _GLIBCXX_ASAN_ANNOTATE_REINIT;
                std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
                              _M_get_Tp_allocator());
                _M_deallocate(this->_M_impl._M_start,
                              this->_M_impl._M_end_of_storage
                              - this->_M_impl._M_start);
                this->_M_impl._M_start = __new_start;
                this->_M_impl._M_finish = __new_finish;
                this->_M_impl._M_end_of_storage = __new_start + __len;
              }
          }
      }


  // vector<bool>
  template<typename _Alloc>
    void
    vector<bool, _Alloc>::
    _M_reallocate(size_type __n)
    {
      _Bit_pointer __q = this->_M_allocate(__n);
      iterator __start(std::__addressof(*__q), 0);
      iterator __finish(_M_copy_aligned(begin(), end(), __start));
      this->_M_deallocate();
      this->_M_impl._M_start = __start;
      this->_M_impl._M_finish = __finish;
      this->_M_impl._M_end_of_storage = __q + _S_nword(__n);
    }

  template<typename _Alloc>
    void
    vector<bool, _Alloc>::
    _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 = 
            _M_check_len(__n, "vector<bool>::_M_fill_insert");
          _Bit_pointer __q = this->_M_allocate(__len);
          iterator __start(std::__addressof(*__q), 0);
          iterator __i = _M_copy_aligned(begin(), __position, __start);
          std::fill(__i, __i + difference_type(__n), __x);
          iterator __finish = std::copy(__position, end(),
                                        __i + difference_type(__n));
          this->_M_deallocate();
          this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
          this->_M_impl._M_start = __start;
          this->_M_impl._M_finish = __finish;
        }
    }

  template<typename _Alloc>
    template<typename _ForwardIterator>
      void
      vector<bool, _Alloc>::
      _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 =
                  _M_check_len(__n, "vector<bool>::_M_insert_range");
                _Bit_pointer __q = this->_M_allocate(__len);
                iterator __start(std::__addressof(*__q), 0);
                iterator __i = _M_copy_aligned(begin(), __position, __start);
                __i = std::copy(__first, __last, __i);
                iterator __finish = std::copy(__position, end(), __i);
                this->_M_deallocate();
                this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
                this->_M_impl._M_start = __start;
                this->_M_impl._M_finish = __finish;
              }
          }
      }

  template<typename _Alloc>
    void
    vector<bool, _Alloc>::
    _M_insert_aux(iterator __position, bool __x)
    {
      if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_addr())
        {
          std::copy_backward(__position, this->_M_impl._M_finish, 
                             this->_M_impl._M_finish + 1);
          *__position = __x;
          ++this->_M_impl._M_finish;
        }
      else
        {
          const size_type __len =
            _M_check_len(size_type(1), "vector<bool>::_M_insert_aux");
          _Bit_pointer __q = this->_M_allocate(__len);
          iterator __start(std::__addressof(*__q), 0);
          iterator __i = _M_copy_aligned(begin(), __position, __start);
          *__i++ = __x;
          iterator __finish = std::copy(__position, end(), __i);
          this->_M_deallocate();
          this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
          this->_M_impl._M_start = __start;
          this->_M_impl._M_finish = __finish;
        }
    }

  template<typename _Alloc>
    typename vector<bool, _Alloc>::iterator
    vector<bool, _Alloc>::
    _M_erase(iterator __position)
    {
      if (__position + 1 != end())
        std::copy(__position + 1, end(), __position);
      --this->_M_impl._M_finish;
      return __position;
    }

  template<typename _Alloc>
    typename vector<bool, _Alloc>::iterator
    vector<bool, _Alloc>::
    _M_erase(iterator __first, iterator __last)
    {
      if (__first != __last)
        _M_erase_at_end(std::copy(__last, end(), __first));
      return __first;
    }

#if __cplusplus >= 201103L
  template<typename _Alloc>
    bool
    vector<bool, _Alloc>::
    _M_shrink_to_fit()
    {
      if (capacity() - size() < int(_S_word_bit))
        return false;
      __try
        {
          _M_reallocate(size());
          return true;
        }
      __catch(...)
        { return false; }
    }
#endif

_GLIBCXX_END_NAMESPACE_CONTAINER
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#if __cplusplus >= 201103L

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  template<typename _Alloc>
    size_t
    hash<_GLIBCXX_STD_C::vector<bool, _Alloc>>::
    operator()(const _GLIBCXX_STD_C::vector<bool, _Alloc>& __b) const noexcept
    {
      size_t __hash = 0;
      using _GLIBCXX_STD_C::_S_word_bit;
      using _GLIBCXX_STD_C::_Bit_type;

      const size_t __words = __b.size() / _S_word_bit;
      if (__words)
        {
          const size_t __clength = __words * sizeof(_Bit_type);
          __hash = std::_Hash_impl::hash(__b._M_impl._M_start._M_p, __clength);
        }

      const size_t __extrabits = __b.size() % _S_word_bit;
      if (__extrabits)
        {
          _Bit_type __hiword = *__b._M_impl._M_finish._M_p;
          __hiword &= ~((~static_cast<_Bit_type>(0)) << __extrabits);

          const size_t __clength
            = (__extrabits + __CHAR_BIT__ - 1) / __CHAR_BIT__;
          if (__words)
            __hash = std::_Hash_impl::hash(&__hiword, __clength, __hash);
          else
            __hash = std::_Hash_impl::hash(&__hiword, __clength);
        }

      return __hash;
    }

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++11

#undef _GLIBCXX_ASAN_ANNOTATE_REINIT
#undef _GLIBCXX_ASAN_ANNOTATE_GROW
#undef _GLIBCXX_ASAN_ANNOTATE_GREW
#undef _GLIBCXX_ASAN_ANNOTATE_SHRINK

#endif /* _VECTOR_TCC */