iterator question.

[Jason Kraftcheck]

Mark Shephard wrote:
> The Simmetrix people have been looking at the ITAPS iMesh, iMeshP, iRel
> and iGeom interfaces.
> 
> One of the questions they have sent us has to do with iterators and is:
> 
> "Are iMesh_getNextEntIter and iGeom_getNextEntIter supposed to have the
> same behavior as their documentation describes two different behaviors -
> iMesh_getNextEntIter indicates whether the current call returned data
> (which is fairly standard behavior for an iterator),iGeom_getNextEntIter
> indicates whether the next call will return data (which is kind of odd
> behavior for an iterator)."
> 
> I would think they should have the same behavior and the iMesh behavior
> is the right one. Comments please.
> 

I think (if I correctly recall the that group discussion about this) that
the iMesh one is the correct one.  Returning information about next call, as
the iGeom one does, is not usable in mesh modification scenarios (consider
iterator at second to last entity when last entity is deleted.)