3D and higher reduction

Author: CasBex

src/CircularArrayBuffers.jl

@@ -96,7 +96,7 @@ end
     end
 end
 
-_buffer_frame(cb::CircularArrayBuffer, I::CartesianIndex) = map(i -> _buffer_frame(cb, i), Tuple(I)...)
+_buffer_frame(cb::CircularArrayBuffer, I::CartesianIndex) = CartesianIndex(map(i->_buffer_frame(cb, i), Tuple(I)))
 _buffer_frame(cb::CircularArrayBuffer, I::AbstractArray{<:Integer}) = map(i -> _buffer_frame(cb, i), I)
 _buffer_frame(cb::CircularArrayBuffer, ::Colon) = _buffer_frame(cb, axes(cb)[end])