[Insight-developers] possible tcon topics

[Miller, James V (CRD)]

The solution (currently) is to not use template specialization but rather put a "switch" or "if"
statement in your GenerateData() method that calls the appropriate "specialized" routine. While this
is a run-time specialization, it is called once per execution of the filter. I suspect the compiler
will optimize out the "other" cases if the switches are all based on template parameters and
typedefs.

This switch could either switch on dimension, or even switch on pixel type using the "typeid"
function.  For the later, I think the syntax is something like

if (typeid(typename TPixel::ValueType) == typeid(unsigned short))
...



-----Original Message-----
From: Damion Shelton [mailto:dmsst59+@pitt.edu]
Sent: Thursday, October 26, 2000 3:09 PM
To: Insight-Developers
Subject: Re: [Insight-developers] possible tcon topics


This is definitely an important issue...

I've run into cases (and I'm relatively new to ITK) where I'd like to
restrict classes to 2 or 3D. So far I've coded under the assumption that the
user understands the intended dimensionality of the class/algorithm and
defines the template correctly, but this is a relatively dangerous way to
program.

-Damion-

/-----------------------------------------------\
                       Damion Shelton
                   University of Pittsburgh
               Department of Bioengineering
                     dmsst59@pitt.edu
                       412-624-9931
\-----------------------------------------------/

> I would be interested to hear any thoughts on alternative ways to do
> partial template specialization during the tcon. For many algorithms it
> makes sense to specialize for 2 and 3 dimensions while leaving the pixel
> type undefined.
>
> Josh.
>
> +--+--+--+--+--+--+--+--+--+--+--+--
>  Josh Cates
>  Department of Computer Science
>  University of Utah
>  Email: cates@cs.utah.edu
>  Phone: (801) 587-7697
>  URL:   www.cs.utk.edu/~cates
> --+--+--+--+--+--+--+--+--+--+--+--->



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