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Fallback definition for mixed sparse styles #84

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Merged
mtfishman merged 1 commit into from
Jan 7, 2026
Merged

Fallback definition for mixed sparse styles #84

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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
name = "SparseArraysBase"
uuid = "0d5efcca-f356-4864-8770-e1ed8d78f208"
authors = ["ITensor developers <support@itensor.org> and contributors"]
version = "0.8.0"
version = "0.8.1"

[deps]
Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"
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2 changes: 1 addition & 1 deletion src/abstractsparsearraystyle.jl
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Expand Up @@ -60,7 +60,7 @@ abstract type AbstractSparseArrayStyle <: AbstractArrayStyle end
function FunctionImplementations.Style(
style1::AbstractSparseArrayStyle, style2::AbstractSparseArrayStyle
)
return error("Rule not defined.")
return SparseArrayStyle()
end
function FunctionImplementations.Style(
style1::AbstractSparseArrayStyle, style2::AbstractArrayStyle
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1 change: 1 addition & 0 deletions test/Project.toml
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Expand Up @@ -4,6 +4,7 @@ Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
ArrayLayouts = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
Dictionaries = "85a47980-9c8c-11e8-2b9f-f7ca1fa99fb4"
FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
FunctionImplementations = "7c7cc465-9c6a-495f-bdd1-f42428e86d0c"
JLArrays = "27aeb0d3-9eb9-45fb-866b-73c2ecf80fcb"
LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
NamedDimsArrays = "60cbd0c0-df58-4cb7-918c-6f5607b73fde"
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26 changes: 26 additions & 0 deletions test/test_sparse_style.jl
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@@ -0,0 +1,26 @@
using FunctionImplementations: Style, style
using SparseArraysBase: AbstractSparseArrayStyle, SparseArrayStyle, sparse_style, sparsezeros
using Test: @test, @testset

module TestSparseStyleUtils
using SparseArraysBase: AbstractSparseArray, AbstractSparseArrayStyle
using FunctionImplementations: FunctionImplementations
struct MySparseArrayStyle <: AbstractSparseArrayStyle end
struct MySparseArray{T, N} <: AbstractSparseArray{T, N}
size::NTuple{N, Int}
end
FunctionImplementations.Style(::Type{<:MySparseArray}) = MySparseArrayStyle()
end

@testset "Combine Sparse Styles" begin
@test sparse_style ≡ SparseArrayStyle()
@test Style(SparseArrayStyle(), SparseArrayStyle()) ≡ SparseArrayStyle()
@test Style(TestSparseStyleUtils.MySparseArrayStyle(), SparseArrayStyle()) ≡
SparseArrayStyle()
@test Style(SparseArrayStyle(), TestSparseStyleUtils.MySparseArrayStyle()) ≡
SparseArrayStyle()
@test style(TestSparseStyleUtils.MySparseArray{Float64, 2}((2, 2))) ≡
TestSparseStyleUtils.MySparseArrayStyle()
@test style(sparsezeros(2, 2), TestSparseStyleUtils.MySparseArray{Float64, 2}((2, 2))) ≡
SparseArrayStyle()
end
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