JuliaArrays / JuliaArrays/StaticArrays.jl

Only Int64 works for the length of the array

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feature question
Dominant language
Julia
Stars
844
Forks
159
Avg merge
3d 21h
Merged PRs (30d)
3

Description

This might be a trivial problem, since the defualt type of integer is Int64.

using StaticArrays
n::Int8 = 20
x= MVector{nw, Float64}(undef)

returns

ERROR: ArgumentError: Static Array parameter Size must be a tuple of Ints (e.g. `SArray{Tuple{3,3}}` or `SMatrix{3,3}`).

while

using StaticArrays
n = 20
x= MVector{nw, Float64}(undef)

works fine.

I think in the Integer supertype, only Int64 is accepted. Is there any particular reason for this?

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Research direction

Start with the Julia reproducer in the issue, comparing an Int8 length with the default Int64 length, and inspect StaticArrays' validation of the MVector size parameter. Determine whether non-Int64 integer lengths should be supported or whether the restriction needs documenting; done means a confirmed behavior with a regression test or a clear explanation.

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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