JuliaArrays / JuliaArrays/StructArrays.jl
StructArray of Singleton Type
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- Dominant language
- Julia
- Stars
- 402
- Forks
- 49
- PR merge metrics
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Description
Logically, a StructArray{Tuple{}} should just be a integer. However, not only does it not compile down to an integer, but it also doesn't even work:
> length(StructArray([(),(),()])) == 0
true
This is an important special case. I'm willing to write up a PR for this, but I would like the guidance and thoughts of the authors of this project before I do that. Also note that
> length([(),(),()]) == 3
true
> sizeof([(),(),()]) == 0
true
so base Julia already has an optimization that makes an array of zero-sized types just take up an integer.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the Julia examples in the issue, especially the incorrect length for StructArray([(),(),()]). Inspect StructArray construction and length handling for singleton or zero-sized element types; done means the resulting array reports length 3 and follows the expected zero-sized storage behavior described in the issue.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100