Behavior of `Ref` in broadcast

[goretkin]

I understand Ref as a length-1 array (tell me how flawed this is), but that's not how it behaves in a broadcast. From the discussion at https://discourse.julialang.org/t/broadcasting-and-arrays-of-arrays/7444/5 :

julia> [1, 2] .- Ref([1, 2])  # behaves like [1, 2] .- [1]
2-element Array{Int64,1}:
 0
 1

julia> [1, 2] .- [[1, 2]]
2-element Array{Array{Int64,1},1}:
 [0, -1]
 [1, 0] 

(thanks @rdeits )

[timholy]

One part of the problem is

julia> eltype(Ref([1,2]))
Int64

julia> eltype(Ref(3))
Int64

That seems broken.

[KristofferC]

Ah, the classical #15303 mixup.

[vtjnash]

I think that’s actually #21527

[vtjnash]

will be fixed when deprecations get deleted

julia> eltype(Ref{Vector{Int}}([1,2]))
Array{Int64,1}