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Ensure correct eltype in 3-term dot involving Eye #370

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Merged
merged 2 commits into from
Aug 29, 2024
Merged

Ensure correct eltype in 3-term dot involving Eye #370

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dd194b4
Ensure correct eltype in 3-term dot involving Eye
jishnub Aug 15, 2024
79dec9e
Convert to the type of the product
jishnub Aug 28, 2024
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4 changes: 3 additions & 1 deletion src/fillalgebra.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -399,7 +399,9 @@ dot(a::AbstractVector, b::AbstractFillVector) = _fill_dot_rev(a, b)
function dot(u::AbstractVector, E::Eye, v::AbstractVector)
length(u) == size(E,1) && length(v) == size(E,2) ||
throw(DimensionMismatch("dot product arguments have dimensions $(length(u))×$(size(E))×$(length(v))"))
dot(u, v)
d = dot(u,v)
T = typeof(one(eltype(E)) * d)
convert(T, d)
end

function dot(u::AbstractVector, D::Diagonal{<:Any,<:Fill}, v::AbstractVector)
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2 changes: 2 additions & 0 deletions test/runtests.jl
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Expand Up @@ -1927,6 +1927,8 @@ end
@test dot(Fill(2,N),1:N) == dot(Fill(2,N),1:N) == dot(1:N,Fill(2,N)) == 2*sum(1:N)
end

@test dot(1:4, Eye(4), 1:4) === dot(1:4, oneunit(eltype(Eye(4))) * I(4), 1:4)

@test_throws DimensionMismatch dot(u[1:end-1], D, v)
@test_throws DimensionMismatch dot(u[1:end-1], D, v[1:end-1])

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