Why is `IndexStyle` specialized for `Base.OneTo`?

[jishnub]

FillArrays.jl/src/FillArrays.jl

Line 59 in de36a50

IndexStyle(::Type{<:AbstractFill{<:Any,N,<:NTuple{N,Base.OneTo{Int}}}}) where N = IndexLinear()

This means

julia> using StaticArrays

julia> f = Fill(1, (SOneTo(2),))
2-element Fill{Int64, 1, Tuple{SOneTo{2}}} with indices SOneTo(2), with entries equal to 1

julia> IndexStyle(f)
IndexCartesian()

This may use linear indexing as well, though.

[dlfivefifty]

I doubt there is a reason for this. Perhaps we were thinking of offset axes?