[Insight-developers] itk::Index, itk::Offset, ... as subclass of itk::FixedArray?

[Luis Ibanez]

Hi Gaetan,

Probably only historical reasons...

I don't see why we couldn't make the itk::Index and
the itk::Offset be derived classes of the itk::FixedArray.

Note however that Dave Cole is working hard on
fixing the Windows 64 bits issues, so you may want
to coordinate those changes (since the itk::Index and
the itk::Offset are at the heart of the 64bits problem).

--

Regarding the intentional lack of a default constructor,
we may have to run these experiments again.  I would
suspect that it is still a valid issue, given that this relates
to making the itkFixedArray appear as plain-old-data,
instead of as a class. (there was also an issue of padding
if I remember correctly...)

What would be the argument in favor of adding the
default constructor ?

(initialization ?,
note that we don't know what T is, in advance...
I'm not sure that we can provide a reasonable
initialization anyways.  T could be a std::string,
or a highly complex class...)


     Luis


------------------------------------------------------------------------
2010/11/16 Gaëtan Lehmann <gaetan.lehmann at jouy.inra.fr>

>
> Hi,
>
> Is there a reason to have the basic array types itk::Index and itk::Offset,
> and maybe others, not implemented as a subclass of itk::FixedArray?
> Also, I see in the doc that no constructor are provided for performance
> reasons. Is it still true with the compilers supported by itk 4?
>
> Thanks,
>
> Gaëtan
>
>
> --
> Gaëtan Lehmann
> Biologie du Développement et de la Reproduction
> INRA de Jouy-en-Josas (France)
> tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
> http://voxel.jouy.inra.fr  http://www.itk.org
> http://www.mandriva.org  http://www.bepo.fr
>
>
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