[Insight-users] itkConceptChecking.h

[Brad King]

Jill Goldschneider 327 wrote:
> My filter is templated over input/output image types that
> must be in vector format, that is, each pixel is a vector.
> It is necessary that the input/output image dimensions be
> the same and that the length of vectors of the input/output
> pixels be the same.  However, it isn't necessary to have
> the vector type be the same type, so I do not want to use
> Concept::SameType.  I would like to use something like
> the existing Concept::SameDimension.  This works:
[snip]
>   itkConceptMacro(SameDimension,
>     (Concept::SameDimension<InputImageDimension,OutputImageDimension>));
> And this is what I'd like to do (it won't compile - duplicate enum value
> for SameDimension)
[snip]
>   itkConceptMacro(SameDimension,
>     (Concept::SameDimension<InputImageVectorDimension,
>                             OutputImageVectorDimension>));

I'm guessing you are trying to put both of these concepts into the same 
class template.  The first argument to the macro is just a name for the 
concept's constraint in your class template, so it must be unique.  Try 
changing the second one to this:

   itkConceptMacro(SameVectorLength,
     (Concept::SameDimension<InputImageVectorDimension,
                             OutputImageVectorDimension>));

-Brad