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Adjoint for vectors may use trailing axes of the parent #52379

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Merged
merged 3 commits into from
Dec 5, 2023
Merged

Adjoint for vectors may use trailing axes of the parent #52379

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5cab259
Adjoint for vectors may use trailing axes of the parent
jishnub Dec 3, 2023
9eb5e69
Add inference tests
jishnub Dec 3, 2023
592891c
Update explicit OffsetArrays test
jishnub Dec 4, 2023
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2 changes: 1 addition & 1 deletion stdlib/LinearAlgebra/src/adjtrans.jl
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Expand Up @@ -324,7 +324,7 @@ axes(A::AdjOrTrans) = reverse(axes(A.parent))
length(A::AdjOrTrans) = length(A.parent)
size(v::AdjOrTransAbsVec) = (1, length(v.parent))
size(A::AdjOrTransAbsMat) = reverse(size(A.parent))
axes(v::AdjOrTransAbsVec) = (Base.OneTo(1), axes(v.parent)...)
axes(v::AdjOrTransAbsVec) = (axes(v.parent,2), axes(v.parent)...)
axes(A::AdjOrTransAbsMat) = reverse(axes(A.parent))
IndexStyle(::Type{<:AdjOrTransAbsVec}) = IndexLinear()
IndexStyle(::Type{<:AdjOrTransAbsMat}) = IndexCartesian()
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9 changes: 8 additions & 1 deletion stdlib/LinearAlgebra/test/adjtrans.jl
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Expand Up @@ -6,6 +6,9 @@ using Test, LinearAlgebra

const BASE_TEST_PATH = joinpath(Sys.BINDIR, "..", "share", "julia", "test")

isdefined(Main, :OffsetArrays) || @eval Main include(joinpath($(BASE_TEST_PATH), "testhelpers", "OffsetArrays.jl"))
using .Main.OffsetArrays

@testset "Adjoint and Transpose inner constructor basics" begin
intvec, intmat = [1, 2], [1 2; 3 4]
# Adjoint/Transpose eltype must match the type of the Adjoint/Transpose of the input eltype
Expand Down Expand Up @@ -87,11 +90,15 @@ end
@test size(Transpose(intvec)) == (1, length(intvec))
@test size(Transpose(intmat)) == reverse(size(intmat))
end
@testset "indices methods" begin
@testset "axes methods" begin
@test axes(Adjoint(intvec)) == (Base.OneTo(1), Base.OneTo(length(intvec)))
@test axes(Adjoint(intmat)) == reverse(axes(intmat))
@test axes(Transpose(intvec)) == (Base.OneTo(1), Base.OneTo(length(intvec)))
@test axes(Transpose(intmat)) == reverse(axes(intmat))

A = OffsetArray([1,2], 2)
@test (@inferred axes(A')[2]) === axes(A,1)
@test (@inferred axes(A')[1]) === axes(A,2)
end
@testset "IndexStyle methods" begin
@test IndexStyle(Adjoint(intvec)) == IndexLinear()
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