Preserve more FieldArrays with parametric eltype.
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N5N3
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And return a `MArray` for mutable `FieldArray`
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This code is likely wrong, as mentioned in the manual for the purpose of this function: |
N5N3
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Aug 2, 2022
src/FieldArray.jl
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| # FieldArrays with parametric `eltype` would be adapted to the new `eltype` automatically. | ||
| A′ = Base.typeintersect(base_type(A), StaticArray{Tuple{Tuple(S)...},T,length(S)}) | ||
| # But extra parameters are disallowed here. Also we check `fieldtypes` to make sure the result is valid. | ||
| isconcretetype(A′) && fieldtypes(A′) === ntuple(Returns(T), Val(prod(S))) && return A′ |
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I still think this branch is useful for FieldArrays with only one parameter for eltype.
Check in L134 seems sufficient for me, as a concrete type with matched fieldtypes should be valid to return.
The `typeintersect` must return a concrete type now. And it's `fieldtypes` should match our doc example.
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Before this PR, user needs to define
similar_typefor their ownFieldArrays with parametriceltype.After this PR, these
FieldArrays would be preserved automatically if there's noSizechange. (Inspired by JuliaLang/julia#46213)This PR also change the default similar type for mutable
FieldArraytoMArray.