[Insight-developers] Run-time polymorphism and Insight

[Bill Hoffman]

Do a cvs update and you will get a new itkSmartPointer that will support
this.  After the update the following should work:

itkObject::Pointer o = itkImage::New();
itkImage::Pointer i = dynamic_cast<itkObject*>(o);

We noticed the same problem here earlier this week, but did not check in
the fix.  (the fix required providing a conversion operator 
to a native pointer for the smartpointer class.  We had removed it
to keep people from using native pointers, but the safety is not
worth the loss of polymorphism.)



At 04:11 PM 6/13/00 -0400, Josh Cates wrote:
>Hello developers,
>
>How do I up-cast or down-cast an Insight object?  Since we are using
>smart pointers, I can't think of a way to use any of the conventional
>methods such as dynamic_cast.
>
>For example, say I want to treat an itkImage::Pointer as an
>itkObject::Pointer, etc,.
>
>In other words, how can I get polymorphic behavior from Insight objects?
>
>Thanks,
>
>Josh.
>
>+--+--+--+--+--+--+--+--+--+--+--+--
>  Josh Cates                     
>  Dept. of Electrical Engineering        
>  University of Tennessee, Knoxville
>  Email: jecates at utk.edu
>  Phone: (865) 974-0694
>  URL:   www.cs.utk.edu/~cates
>--+--+--+--+--+--+--+--+--+--+--+---
>
>
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