Re: [Boost-users] ptr_sequence and transfer functions.

From: Matthew Bray (mat_at_[hidden])
Date: 2007-03-21 08:25:33

Thorsten Ottosen wrote:
> Matthew Bray skrev:
>> <snip>
> 
> I think the documentation is incorrect.
> 
> Could you check if this has been fixed in 1.34?
> 
> -Thorsten
> 

The code below almost allows the transfer functions to work as shown in 
the current documentation, unfortunately 
'reversible_ptr_container::c_private()' is protected and stopping the 
lines 'from.c_private(). ...' from compiling. If c_private is made 
public then the transfer functions work correctly, possibly there's a 
further work-around?

Mat.

> Here's the code for 1.34:
> 
>          template< class PtrSeqAdapter >
>          void transfer( iterator before,
>                         BOOST_DEDUCED_TYPENAME PtrSeqAdapter::iterator 
> first,
>                         BOOST_DEDUCED_TYPENAME PtrSeqAdapter::iterator 
> last,
>                         PtrSeqAdapter& from ) // strong
>          {
>              BOOST_ASSERT( (void*)&from != (void*)this );
>              if( from.empty() )
>                  return;
>              this->c_private().
>                  insert( before.base(),
>                          first.base(), last.base() ); // strong
>              from.c_private().erase( first.base(),
>                                      last.base() );   // nothrow
>          }
> 
>          template< class PtrSeqAdapter >
>          void transfer( iterator before,
>                         BOOST_DEDUCED_TYPENAME PtrSeqAdapter::iterator 
> object,
>                         PtrSeqAdapter& from ) // strong
>          {
>              BOOST_ASSERT( (void*)&from != (void*)this );
>              if( from.empty() )
>                  return;
>              this->c_private().
>                  insert( before.base(),
>                          *object.base() );                 // strong
>              from.c_private().erase( object.base() );      // nothrow
>          }
> 
>          template< class PtrSeqAdapter >
>          void transfer( iterator before, PtrSeqAdapter& from ) // strong
>          {
>              BOOST_ASSERT( (void*)&from != (void*)this );
>              if( from.empty() )
>                  return;
>              this->c_private().
>                  insert( before.base(),
>                          from.begin().base(), from.end().base() ); // strong
>              from.c_private().clear();                             // 
> nothrow
>          }