Re: [Boost-users] [shared_ptr] A newbie boost::shared_ptr question

From: Manuel Jung (gzahl_at_[hidden])
Date: 2007-05-08 11:25:36

Olivier Tournaire wrote:

> Hi all,
> 
> I am trying to use shared_ptr in my code, but, I encoutered some problems.
> Here is a piece of my code :
> 
> The main :
> 
> boost::shared_ptr<OGRRectangle> rect( new OGRRectangle(5.,TPoint2D
> <double>(50.,20.),0.1325) );
> boost::shared_ptr< rectangle_with_profile<OGRRectangle> > r( new
> rectangle_with_profile<OGRRectangle> ( rect , 5 , 12 , 1.5 , EXTREME) );
> 
> The rectangle_with_profile<T> constructor :
> 
> template <class Rect_class>
> rectangle_with_profile<Rect_class>::rectangle_with_profile(
> boost::shared_ptr<Rect_class> rect , const unsigned int &nb_profiles ,
> const unsigned int &nb_points , const double &distance , const
> eProfilePosition &position=CENTER )
> {
>     m_rectangle = rect;
>    // ...
>    // ...
> }

What is the Type of m_rectangle? It should be m_rectangle? If it isnt, this
is maybe the problem (And it is of type scoped_ptr e.g.)
Because than maybe the scoped_ptr would call the destructor. Could you post
some more quellcode?
Greetings 
Manuel Jung

> Just after the line
> boost::shared_ptr< rectangle_with_profile<OGRRectangle> > r( new
> rectangle_with_profile<OGRRectangle> ( rect , 5 , 12 , 1.5 , EXTREME) );
> the rect<T> destructor is called, and the m_rectangle in
> rectangle_with_profile handles a deleted pointer ...
> 
> What am I missing ?
> 
> Thanks in advance for your help.
>