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Specialize unaliascopy for a BandedMatrix #478

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Merged
merged 1 commit into from
Apr 21, 2025
Merged

Specialize unaliascopy for a BandedMatrix #478

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4 changes: 4 additions & 0 deletions src/banded/BandedMatrix.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1032,3 +1032,7 @@ function one(A::BandedMatrix)
m==n || throw(DimensionMismatch("multiplicative identity defined only for square matrices"))
typeof(A)(I, (m,n))
end

function Base.unaliascopy(B::BandedMatrix)
_BandedMatrix(Base.unaliascopy(B.data), Base.unaliascopy(B.raxis), B.l, B.u)
end
7 changes: 7 additions & 0 deletions test/test_banded.jl
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Expand Up @@ -586,6 +586,13 @@ include("mymatrix.jl")
@test Q == I(5)
@test eltype(Q) == Float64
end

@testset "unaliascopy" begin
B = BandedMatrices._BandedMatrix(view(randn(1, 5),:,:), 5, 0, 0)
B2 = Base.unaliascopy(B)
@test B2 == B
@test typeof(B2) == typeof(B)
end
end

end # module
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