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Inline blocksizes for better type-inference #429

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Dec 3, 2024
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Inline blocksizes for better type-inference #429

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2 changes: 1 addition & 1 deletion src/blocks.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,7 @@
```
"""
blocksizes(A::AbstractArray) = BlockSizes(A)
blocksizes(A::AbstractArray, d::Integer) = blocklengths(axes(A, d))
@inline blocksizes(A::AbstractArray, d::Integer) = blocklengths(axes(A, d))

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struct BlockSizes{T,N,A<:AbstractArray{<:Any,N}} <: AbstractArray{T,N}
array::A
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8 changes: 8 additions & 0 deletions test/test_blocks.jl
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Expand Up @@ -127,6 +127,14 @@ end
@test blocksizes(A, 1) == [2, 3]
@test blocksizes(A, 2) == [3, 1]
end

@testset "Inference: issue #425" begin
x = BlockedArray(rand(4, 4), [2, 2], [2, 2])
bs1 = @inferred (x -> blocksizes(x, 1))(x)
@test bs1 == [2,2]
bs4 = @inferred (x -> blocksizes(x, 4))(x)
@test bs4 == 1:1
end
end

end # module
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