Move StaticArrayStyle here.

[N5N3]

This PR wants to move Size, StaticArrayStyle, is_staticarray_like (renamed from isstatic), and similar_type into Core package.
These functions are needed in StructArrays.jl to support static broadcast for a StructArray of StaticArrays. JuliaArrays/StructArrays.jl#215 (comment)
Edit: It turns out we only need StaticArrayStyle and similar_type to achieve this. Since similar_type has been taken care by #5
This PR only wants to move StaticArrayStyle here.

[codecov]

Codecov Report

Merging #8 (18e296a) into main (c97edbf) will not change coverage.
The diff coverage is 100.00%.

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Impacted Files	Coverage Δ
src/StaticArraysCore.jl	100.00% <100.00%> (ø)

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[mateuszbaran]

Looks fine, could you just add a test for the constructor and bump version?

I haven't merged #5 yet because I don't know which methods of similar_type need to be moved here -- I'd like some input on this before merging that PR.

[N5N3]

which methods of similar_type need to be moved here

I'm assuming similar_type could be used only when we have loaded StaticArrays.jl?
If that's true, then #5 should be enough for 2-args usage. (Just like StructArrays.jl).

But if some package want to add more methods, I think we will have to move Size here.

[mateuszbaran]

I'm assuming similar_type could be used only when we have loaded StaticArrays.jl?
If that's true, then #5 should be enough for usage. (Just like StructArrays.jl).

Technically similar_type could be used without StaticArrays.jl and that's why I want some input -- it's perfectly fine to just have a function without methods here for people to extend it in other packages but so far no one confirmed that this is what they want.

But if some package want to add more methods, I think we will have to move Size here.

That is very likely but it should not be a problem.

[mateuszbaran]

@N5N3 could you make a corresponding PR to StaticArrays.jl?

[N5N3]

Is it ok to wait for similar_type? There seems no need to separate their movement, as no other guys said they also want to move StaticArrayStyle here.

…

------------------ Original ------------------ From: Mateusz Baran ***@***.***> Date: Tue,Aug 23,2022 6:41 PM To: JuliaArrays/StaticArraysCore.jl ***@***.***> Cc: N5N3 ***@***.***>, Mention ***@***.***> Subject: Re: [JuliaArrays/StaticArraysCore.jl] Move `StaticArrayStyle` here. (PR #8) @N5N3 could you make a corresponding PR to StaticArrays.jl? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>

[mateuszbaran]

I wouldn't like to have StaticArraysCore and StaticArrays desynchronized for too long. Are you planning to work on similar_type this week? Or do you just need the function definition like in #5 ?

[N5N3]

StructArrays.jl only wants to call similar_type, so #5 is enough for us.

…

------------------ Original ------------------ From: Mateusz Baran ***@***.***> Date: Tue,Aug 23,2022 7:03 PM To: JuliaArrays/StaticArraysCore.jl ***@***.***> Cc: N5N3 ***@***.***>, Mention ***@***.***> Subject: Re: [JuliaArrays/StaticArraysCore.jl] Move `StaticArrayStyle` here. (PR #8) I wouldn't like to have StaticArraysCore and StaticArrays desynchronized for too long. Are you planning to work on similar_type this week? Or do you just need the function definition like in #5 ? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>

[mateuszbaran]

OK, then I will finish that PR today.