JuliaArrays / JuliaArrays/FillArrays.jl

`real(::Fill)` gives an array of arrays?

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Julia
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Description

This is surprising:

julia> real(Fill(1+im)) isa Array{<:AbstractArray{Int}}
true

julia> real(fill(1+im)) isa Array{Int,0}
true

(jl_AeiBcQ) pkg> st
      Status `/private/var/folders/yq/4p2zwd614y59gszh7y9ypyhh0000gn/T/jl_AeiBcQ/Project.toml`
  [1a297f60] FillArrays v0.11.7

I guess it comes from this difference, via broadcast_preserving_zero_d:

julia> Fill(1) .+ Fill(2)
0-dimensional Fill{Int64}, with entry equal to 3

julia> fill(1) .+ fill(2)
3

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Research direction

Start by reproducing the real(Fill(1+im)) and fill(1+im) comparisons from the issue, then inspect broadcast_preserving_zero_d and the behavior of Fill(1) .+ Fill(2). Done should establish consistent dimensionality and element structure for these equivalent operations, with regression coverage for the shown cases.

Written by the indexing model from the issue text.

Assessment

Tech stack
julia
Domain
data
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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