[vtk-developers] isnan

[Thompson, David C]

> In the mean time, how about the question of where to put
> the actual isnan function in VTK, hopefully in a way that
> introduces as little overhead as possible?  Is vtkstd::isnan()
> the right place (since that's analogous to std::isnan() )?

Note that vtkMath already has static member functions
Inf(), NegInf(), and Nan() that return constants. If isnan
is placed in vtkstd, then these functions should also move
there. I would prefer vtkMath::IsNan() though. Also, I'm under
the impression that some of the compilers that Kitware wishes
to support (*cough*MSVC 6*cough*) don't have isnan() at all -- but
I could easily be wrong about that as I am not a Windows person.

    David
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