[C++-sig] shared_ptr, abstract classes and inheritance

[Tobias Kräntzer]

Am Dienstag, 24. Oktober 2006 23:28 schrieb Tobias Kräntzer:
> > Does it help?
>
> unfortunately not.
> the same behavior as before.

Temporally I've made a workaround:
I changed the factory to:

list factory( bool use_derived )
{
    list result;
    if ( !use_derived )
    {
        Base::Ptr pt( new Base_impl() );
        result.append( pt );
    }
    else
    {
        Derived::Ptr pt( new Derived_impl() );
        result.append( pt );
    };
    return( result );
};

an write an new factory in Python:

>>> import test
>>> _old_factory = test.factory
>>>
>>> def _new_factory( derived ):
...     return _old_factory( derived )[0]

>>> test.factory = _new_factory
>>>
>>> test.factory( True )
<test.Derived object at 0xb7bbf994> 

>>> test.factory( False )
<test.Base object at 0xb7bd056c>

>>> test.factory( True ).bar()
'Derived bar'

I will focus on a solution to the problem later.
But at the moment, thanks for help.