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   void priv_long_addr(pointer addr)
   {  this->members_.m_repr.long_repr().start = addr;  }

   size_type priv_storage() const
   {  return this->is_short() ? priv_short_storage() : priv_long_storage();  }

   size_type priv_short_storage() const
   {  return InternalBufferChars;  }

   size_type priv_long_storage() const
   {  return this->members_.m_repr.long_repr().storage;  }

   void priv_storage(size_type storage)
   {
      if(!this->is_short())
         this->priv_long_storage(storage);
   }

   void priv_long_storage(size_type storage)
   {
      this->members_.m_repr.long_repr().storage = storage;
   }

   size_type priv_size() const
   {  return this->is_short() ? this->priv_short_size() : this->priv_long_size();  }

   size_type priv_short_size() const
   {  return this->members_.m_repr.short_repr().h.length;  }

   size_type priv_long_size() const
   {  return this->members_.m_repr.long_repr().length;  }

   void priv_size(size_type sz)
   {
      if(this->is_short())
         this->priv_short_size(sz);
      else
         this->priv_long_size(sz);
   }

   void priv_short_size(size_type sz)
   {
      this->members_.m_repr.s.h.length = (unsigned char)sz;
   }

   void priv_long_size(size_type sz)
   {
      this->members_.m_repr.long_repr().length = sz;
   }

   void swap_data(basic_string_base& other)
   {
      if(this->is_short()){
         if(other.is_short()){
            repr_t tmp(this->members_.m_repr);
            this->members_.m_repr = other.members_.m_repr;
            other.members_.m_repr = tmp;
         }
         else{
            short_t short_backup(this->members_.m_repr.short_repr());
            this->members_.m_repr.short_repr().~short_t();
            ::new(&this->members_.m_repr.long_repr()) long_t(other.members_.m_repr.long_repr());
            other.members_.m_repr.long_repr().~long_t();
            ::new(&other.members_.m_repr.short_repr()) short_t(short_backup);
         }
      }
      else{
         if(other.is_short()){
            short_t short_backup(other.members_.m_repr.short_repr());
            other.members_.m_repr.short_repr().~short_t();
            ::new(&other.members_.m_repr.long_repr()) long_t(this->members_.m_repr.long_repr());
            this->members_.m_repr.long_repr().~long_t();
            ::new(&this->members_.m_repr.short_repr()) short_t(short_backup);
         }
         else{
            boost::adl_move_swap(this->members_.m_repr.long_repr(), other.members_.m_repr.long_repr());
         }
      }
   }
};

}  //namespace dtl {

#endif   //#ifndef BOOST_CONTAINER_DOXYGEN_INVOKED

//! The basic_string class represents a Sequence of characters. It contains all the
//! usual operations of a Sequence, and, additionally, it contains standard string
//! operations such as search and concatenation.
//!
//! The basic_string class is parameterized by character type, and by that type's
//! Character Traits.
//!
//! This class has performance characteristics very much like vector<>, meaning,
//! for example, that it does not perform reference-count or copy-on-write, and that
//! concatenation of two strings is an O(N) operation.
//!
//! Some of basic_string's member functions use an unusual method of specifying positions
//! and ranges. In addition to the conventional method using iterators, many of
//! basic_string's member functions use a single value pos of type size_type to represent a
//! position (in which case the position is begin() + pos, and many of basic_string's
//! member functions use two values, pos and n, to represent a range. In that case pos is
//! the beginning of the range and n is its size. That is, the range is
//! [begin() + pos, begin() + pos + n).
//!
//! Note that the C++ standard does not specify the complexity of basic_string operations.
//! In this implementation, basic_string has performance characteristics very similar to
//! those of vector: access to a single character is O(1), while copy and concatenation
//! are O(N).
//!
//! In this implementation, begin(),
//! end(), rbegin(), rend(), operator[], c_str(), and data() do not invalidate iterators.
//! In this implementation, iterators are only invalidated by member functions that
//! explicitly change the string's contents.
//!
//! \tparam CharT The type of character it contains.
//! \tparam Traits The Character Traits type, which encapsulates basic character operations
//! \tparam Allocator The allocator, used for internal memory management.
#ifdef BOOST_CONTAINER_DOXYGEN_INVOKED
template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = new_allocator<CharT> >
#else
template <class CharT, class Traits, class Allocator>
#endif
class basic_string
   :  private dtl::basic_string_base<Allocator>
{
   #ifndef BOOST_CONTAINER_DOXYGEN_INVOKED
   private:
   typedef allocator_traits<Allocator> allocator_traits_type;
   BOOST_COPYABLE_AND_MOVABLE(basic_string)
   typedef dtl::basic_string_base<Allocator> base_t;
   static const typename base_t::size_type InternalBufferChars = base_t::InternalBufferChars;

   protected: