[vtk-developers] const correctness

[David Thompson]

Hi Dave,

> Which compiler out of curiosity? VS 7.1?

I didn't recall, but after some googling, it appears it VS6 may have  
had a bug in its support. There is also a small bug in VS7.1 with  
"const mutable" sometimes being accepted as a template parameter, but  
that shouldn't be a problem for VTK.

	David

> On Thu, Feb 10, 2011 at 3:08 PM, David Thompson <dcthomp at sandia.gov>  
> wrote:
> Also, const-correctness can be difficult in situations where some  
> tasks appear to be const but in fact are not, leading to  
> difficulties when you need to use them inside another const  
> function. For example, vtkPointLocator::FindClosestPoint() seems  
> like it should be const but in fact it may need to rebuild the  
> bucket structure used to accelerate the search.
>
> -> This is why there is the "mutable" keyword in C++.
>
> I was under the impression that at least one compiler VTK supported  
> didn't handle it, but that may have changed when some of the  
> compilers were dropped a while back.
>
>        David
>
>
>
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