From 1c7c380bc83788aefc297d01b8b80bf247e01152 Mon Sep 17 00:00:00 2001
From: mtfishman <mfishman@flatironinstitute.org>
Date: Mon, 21 Jul 2025 17:51:00 -0400
Subject: [PATCH] Upgrade to BlockSparseArrays.jl v0.8

---
 Project.toml                                  | 14 ++---
 .../KroneckerArraysBlockSparseArraysExt.jl    | 52 +++++++++----------
 test/Project.toml                             |  3 +-
 3 files changed, 33 insertions(+), 36 deletions(-)

diff --git a/Project.toml b/Project.toml
index 46edc19..50fc329 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "KroneckerArrays"
 uuid = "05d0b138-81bc-4ff7-84be-08becefb1ccc"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
-version = "0.1.23"
+version = "0.1.24"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
@@ -21,14 +21,14 @@ BlockSparseArrays = "2c9a651f-6452-4ace-a6ac-809f4280fbb4"
 KroneckerArraysBlockSparseArraysExt = ["BlockArrays", "BlockSparseArrays"]
 
 [compat]
-Adapt = "4.3.0"
+Adapt = "4.3"
 BlockArrays = "1.6"
-BlockSparseArrays = "0.7.22"
-DerivableInterfaces = "0.5.0"
+BlockSparseArrays = "0.8"
+DerivableInterfaces = "0.5"
 DiagonalArrays = "0.3.5"
-FillArrays = "1.13.0"
-GPUArraysCore = "0.2.0"
+FillArrays = "1.13"
+GPUArraysCore = "0.2"
 LinearAlgebra = "1.10"
 MapBroadcast = "0.1.9"
-MatrixAlgebraKit = "0.2.0"
+MatrixAlgebraKit = "0.2"
 julia = "1.10"
diff --git a/ext/KroneckerArraysBlockSparseArraysExt/KroneckerArraysBlockSparseArraysExt.jl b/ext/KroneckerArraysBlockSparseArraysExt/KroneckerArraysBlockSparseArraysExt.jl
index b23c869..e67d3aa 100644
--- a/ext/KroneckerArraysBlockSparseArraysExt/KroneckerArraysBlockSparseArraysExt.jl
+++ b/ext/KroneckerArraysBlockSparseArraysExt/KroneckerArraysBlockSparseArraysExt.jl
@@ -24,7 +24,7 @@ function BlockSparseArrays.blockrange(bs::Vector{<:CartesianProduct})
 end
 
 using BlockArrays: AbstractBlockedUnitRange
-using BlockSparseArrays: Block, GetUnstoredBlock, eachblockaxis, mortar_axis
+using BlockSparseArrays: Block, ZeroBlocks, eachblockaxis, mortar_axis
 using DerivableInterfaces: zero!
 using FillArrays: Eye
 using KroneckerArrays:
@@ -56,45 +56,41 @@ function block_axes(ax::NTuple{N,AbstractUnitRange{<:Integer}}, I::Block{N}) whe
   return block_axes(ax, Tuple(I)...)
 end
 
-function (f::GetUnstoredBlock)(
-  ::Type{<:AbstractMatrix{KroneckerMatrix{T,A,B}}}, I::Vararg{Int,2}
+function Base.getindex(
+  a::ZeroBlocks{2,KroneckerMatrix{T,A,B}}, I::Vararg{Int,2}
 ) where {T,A<:AbstractMatrix{T},B<:AbstractMatrix{T}}
-  ax_a = arg1.(f.axes)
-  f_a = GetUnstoredBlock(ax_a)
-  a = f_a(AbstractMatrix{A}, I...)
+  ax_a1 = arg1.(a.parentaxes)
+  a1 = ZeroBlocks{2,A}(ax_a1)[I...]
 
-  ax_b = arg2.(f.axes)
-  f_b = GetUnstoredBlock(ax_b)
-  b = f_b(AbstractMatrix{B}, I...)
+  ax_a2 = arg2.(a.parentaxes)
+  a2 = ZeroBlocks{2,B}(ax_a2)[I...]
 
-  return a ⊗ b
+  return a1 ⊗ a2
 end
-function (f::GetUnstoredBlock)(
-  ::Type{<:AbstractMatrix{EyeKronecker{T,A,B}}}, I::Vararg{Int,2}
+function Base.getindex(
+  a::ZeroBlocks{2,EyeKronecker{T,A,B}}, I::Vararg{Int,2}
 ) where {T,A<:Eye{T},B<:AbstractMatrix{T}}
-  block_ax_a = arg1.(block_axes(f.axes, Block(I)))
-  a = _similar(A, block_ax_a)
+  block_ax_a1 = arg1.(block_axes(a.parentaxes, Block(I)))
+  a1 = _similar(A, block_ax_a1)
 
-  ax_b = arg2.(f.axes)
-  f_b = GetUnstoredBlock(ax_b)
-  b = f_b(AbstractMatrix{B}, I...)
+  ax_a2 = arg2.(a.parentaxes)
+  a2 = ZeroBlocks{2,B}(ax_a2)[I...]
 
-  return a ⊗ b
+  return a1 ⊗ a2
 end
-function (f::GetUnstoredBlock)(
-  ::Type{<:AbstractMatrix{KroneckerEye{T,A,B}}}, I::Vararg{Int,2}
+function Base.getindex(
+  a::ZeroBlocks{2,KroneckerEye{T,A,B}}, I::Vararg{Int,2}
 ) where {T,A<:AbstractMatrix{T},B<:Eye{T}}
-  ax_a = arg1.(f.axes)
-  f_a = GetUnstoredBlock(ax_a)
-  a = f_a(AbstractMatrix{A}, I...)
+  ax_a1 = arg1.(a.parentaxes)
+  a1 = ZeroBlocks{2,A}(ax_a1)[I...]
 
-  block_ax_b = arg2.(block_axes(f.axes, Block(I)))
-  b = _similar(B, block_ax_b)
+  block_ax_a2 = arg2.(block_axes(a.parentaxes, Block(I)))
+  a2 = _similar(B, block_ax_a2)
 
-  return a ⊗ b
+  return a1 ⊗ a2
 end
-function (f::GetUnstoredBlock)(
-  ::Type{<:AbstractMatrix{EyeEye{T,A,B}}}, I::Vararg{Int,2}
+function Base.getindex(
+  a::ZeroBlocks{2,EyeEye{T,A,B}}, I::Vararg{Int,2}
 ) where {T,A<:Eye{T},B<:Eye{T}}
   return error("Not implemented.")
 end
diff --git a/test/Project.toml b/test/Project.toml
index 16b4265..81469e5 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -12,6 +12,7 @@ KroneckerArrays = "05d0b138-81bc-4ff7-84be-08becefb1ccc"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MatrixAlgebraKit = "6c742aac-3347-4629-af66-fc926824e5e4"
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
+SparseArraysBase = "0d5efcca-f356-4864-8770-e1ed8d78f208"
 StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"
 Suppressor = "fd094767-a336-5f1f-9728-57cf17d0bbfb"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
@@ -21,7 +22,7 @@ TestExtras = "5ed8adda-3752-4e41-b88a-e8b09835ee3a"
 Adapt = "4"
 Aqua = "0.8"
 BlockArrays = "1.6"
-BlockSparseArrays = "0.7.21"
+BlockSparseArrays = "0.8"
 DerivableInterfaces = "0.5"
 DiagonalArrays = "0.3.7"
 FillArrays = "1"