[Insight-developers] bcc error

[Joshua Cates]

Hi Luis,

Yes I thought about doing it this way and depending on inlining.  That may 
be the best option.

Thanks,

Josh.

______________________________
 Josh Cates			
 School of Computer Science	
 University of Utah
 Email: cates@sci.utah.edu
 Phone: (801) 587-7697
 URL:   http://www.sci.utah.edu/~cates


On Wed, 8 Jan 2003, Luis Ibanez wrote:

> Hi Josh,
> 
> Borland definetly manage the access
> rights of derived classes in a particular
> (non-standard) way.
> 
> We had a similar problem in the past when
> creating the STL adaptor for the VectorContainer.
> At the end we compromised in letting the
> derivation be public. (not an optimal solution).
> 
> 
> It is unfortunate the Borland does that since
> this is a pretty basic functionality.
> 
> 
> As an alternative...
> Wouldn't be ok if insted of exposing the method
> you delegate from the base class ?
> 
> like
> 
> 
> class ConstShapedNeighborhoodIterator : private NeighborhoodIterator
> {
> public:
>     GetPixel()
>       {
>       Superclass::GetPixel(); // invoke the method in the base class
>       }
> protected:
>     SetPixel()
>       {
>       Superclass::SetPixel;  // invoke the method in the base class
>       }
> 
> };
> 
> 
> Hopefully the methods will be inlined and no
> performance penalty will occur...
> 
> 
> 
>    Luis
> 
> 
> ---------------------------------------------
> 
> Joshua Cates wrote:
> 
> > Hi all,
> > 
> > I'm puzzled by an error I'm getting from the Borland compiler.  I don't 
> > understand why it is identified as an error.
> > 
> > The error results from the following construct:
> > 
> > class NeighborhoodIterator
> > {
> > public:
> >   void SetPixel(PixelType);
> >   PixelType GetPixel();
> > };
> > 
> > class ConstShapedNeighborhoodIterator : private NeighborhoodIterator
> > {
> > public:
> >   Superclass::GetPixel; // expose this method to the public interface
> > protected:
> >    Superclass::SetPixel;  // hide this method from public interface, but 
> >                           // keep it accessible to subclass
> > };
> > 
> > class ShapedNeighborhoodIterator : public ConstShapedNeighborhoodIterator
> > {
> > public:
> >   Superclass::SetPixel;  // expose again to public interface
> > };
> > 
> > 
> > Error E2009 
> > C:\itkQuality\Insight\Code\Common\itkConstShapedNeighborhoodIterator.h 
> > 285: Attempt to grant or reduce access to 
> > 'itk::NeighborhoodIterator<TestImageType,itk::ZeroFluxNeumannBoundaryCondition<TestImageType> 
> > 
> >>::SetPixel(const unsigned int,const itk::Index<4> &,bool &)' in function 
> >>
> > PrintShapedNeighborhood(const 
> > itk::ConstShapedNeighborhoodIterator<TestImageType,itk::ZeroFluxNeumannBoundaryCondition<TestImageType> 
> > 
> >>&)
> >>
> > 
> > 
> > My intent is, in fact, to reduce access to SetPixel in
> > ConstShapedNeighborhood.  Why should this be an error?  (Even vc++ allows
> > it.)  If I move the declaration of SetPixel to public in
> > ConstShapedNeighborhoodIterator, Borland is happy.
> > 
> > Josh.
> > 
> > ______________________________
> >  Josh Cates			
> >  School of Computer Science	
> >  University of Utah
> >  Email: cates@sci.utah.edu
> >  Phone: (801) 587-7697
> >  URL:   http://www.sci.utah.edu/~cates
> > 
> > 
> > _______________________________________________
> > Insight-developers mailing list
> > Insight-developers@public.kitware.com
> > http://public.kitware.com/mailman/listinfo/insight-developers
> > 
> > 
> 
> 
>