mrufsvold

module fill
export fillforward!, fillbackward!

"""backfirstfillloop and fillloop are supporting functions for fillcol!"""
function backfirstfillloop!(arr::AbstractArray{Union{Missing,T}, 1},filldirection::Function) where T
    # Create a pointer of the same type as the array elements to keep
    # the loop type stable
    fillval = Ref{T}()
    foundfirst = false
    firstval = Ref{T}()