Thanks for your reply Tim.
Are x and y offsets with respect to the "parent" range cr?
>
> If so, you can achieve this with a 1-liner,
>
> CartesianRange(cr.start+x-1, cr.start+y-1)
>
No, not "Cartesian" offsets, but "linear" offsets transformed to Cartesian
equivalent.
That's why I think I need the dimensions of the parent range.
julia> I1 = CartesianIndex((3,3,3))
> CartesianIndex{3}((3,3,3))
>
> julia> I2 = CartesianIndex((5,1,7))
> CartesianIndex{3}((5,1,7))
>
> julia> R = CartesianRange(I1, I2)
> CartesianRange{CartesianIndex{3}}(CartesianIndex{3}((3,3,3)),CartesianIndex{3}
>
>
> ((5,1,7)))
>
As you point out, R here is effectively an empty iterator.
However for my use, that same range R could be non-empty if it is a
sub-range of a larger enclosing range.
Say CartesianSubRange(CartesianRange((8,8,8)), I1, I2))
So I want to iterate within the parent CartesianRange dimensions, from I1
to I2.
