From 9cb97530f815b82795c351c2119708ee6c165b16 Mon Sep 17 00:00:00 2001
From: Matthew Fishman <mfishman@flatironinstitute.org>
Date: Tue, 30 Jun 2026 14:55:18 -0400
Subject: [PATCH 1/4] Drop BlockArrays extension and support TensorAlgebra 0.14

Removes the `BlockArrays` extension along with its tests, since there is no current need to wrap `BlockArrays` types directly, and raises the `TensorAlgebra` compat bound to 0.14 (https://github.com/ITensor/TensorAlgebra.jl/pull/194).
---
 Project.toml                                  | 11 ++--
 .../ITensorBaseBlockArraysExt.jl              | 56 -------------------
 test/Project.toml                             |  4 +-
 test/test_blockarraysext.jl                   | 39 -------------
 4 files changed, 7 insertions(+), 103 deletions(-)
 delete mode 100644 ext/ITensorBaseBlockArraysExt/ITensorBaseBlockArraysExt.jl
 delete mode 100644 test/test_blockarraysext.jl

diff --git a/Project.toml b/Project.toml
index 537dc3d..20d4ede 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "ITensorBase"
 uuid = "4795dd04-0d67-49bb-8f44-b89c448a1dc7"
-version = "0.9.1"
+version = "0.9.2"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
 
 [workspace]
@@ -27,13 +27,15 @@ WrappedUnions = "325db55a-9c6c-5b90-b1a2-ec87e7a38c44"
 
 [weakdeps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
-BlockArrays = "8e7c35d0-a365-5155-bbbb-fb81a777f24e"
 Mooncake = "da2b9cff-9c12-43a0-ae48-6db2b0edb7d6"
 TensorOperations = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
 
+[sources.TensorAlgebra]
+rev = "mf/inline-strided-permute"
+url = "https://github.com/ITensor/TensorAlgebra.jl"
+
 [extensions]
 ITensorBaseAdaptExt = "Adapt"
-ITensorBaseBlockArraysExt = "BlockArrays"
 ITensorBaseMooncakeExt = "Mooncake"
 ITensorBaseTensorOperationsExt = "TensorOperations"
 
@@ -42,7 +44,6 @@ AbstractTrees = "0.4.5"
 Accessors = "0.1.39"
 Adapt = "4.1.1"
 ArrayLayouts = "1.11"
-BlockArrays = "1.3"
 Combinatorics = "1"
 Compat = "4.16"
 ConstructionBase = "1.6"
@@ -52,7 +53,7 @@ Mooncake = "0.4.202, 0.5"
 OrderedCollections = "1.6"
 Random = "1.10"
 SimpleTraits = "0.9.4"
-TensorAlgebra = "0.13.4"
+TensorAlgebra = "0.14"
 TensorOperations = "5.3.1"
 TermInterface = "2"
 TupleTools = "1.6"
diff --git a/ext/ITensorBaseBlockArraysExt/ITensorBaseBlockArraysExt.jl b/ext/ITensorBaseBlockArraysExt/ITensorBaseBlockArraysExt.jl
deleted file mode 100644
index 743d407..0000000
--- a/ext/ITensorBaseBlockArraysExt/ITensorBaseBlockArraysExt.jl
+++ /dev/null
@@ -1,56 +0,0 @@
-module ITensorBaseBlockArraysExt
-using ArrayLayouts: ArrayLayouts
-using BlockArrays: Block, BlockRange
-using ITensorBase: AbstractNamedTensor, NamedUnitRange, getindex_named, view_nameddims
-
-# These methods disambiguate named-range block indexing from `BlockArrays`' generic
-# `AbstractArray` block-indexing methods.
-function Base.getindex(r::NamedUnitRange, I::Block{1})
-    # TODO: Use `Derive.@interface NamedArrayInterface() r[I]` instead.
-    return getindex_named(r, I)
-end
-
-function Base.getindex(r::NamedUnitRange, I::BlockRange{1})
-    # TODO: Use `Derive.@interface NamedArrayInterface() r[I]` instead.
-    return getindex_named(r, I)
-end
-
-const BlockIndex{N} = Union{Block{N}, BlockRange{N}, AbstractVector{<:Block{N}}}
-
-function Base.view(a::AbstractNamedTensor, I1::Block{1}, Irest::BlockIndex{1}...)
-    # TODO: Use `Derive.@interface ITensorInterface() r[I]` instead.
-    return view_nameddims(a, I1, Irest...)
-end
-
-function Base.view(a::AbstractNamedTensor, I::Block)
-    # TODO: Use `Derive.@interface ITensorInterface() r[I]` instead.
-    return view_nameddims(a, Tuple(I)...)
-end
-
-function Base.view(a::AbstractNamedTensor, I1::BlockIndex{1}, Irest::BlockIndex{1}...)
-    # TODO: Use `Derive.@interface ITensorInterface() r[I]` instead.
-    return view_nameddims(a, I1, Irest...)
-end
-
-# Fix ambiguity error.
-function Base.getindex(
-        a::AbstractNamedTensor, I1::BlockRange{1}, Irest::BlockRange{1}...
-    )
-    return ArrayLayouts.layout_getindex(a, I1, Irest...)
-end
-
-# Fix ambiguity errors.
-function Base.getindex(a::AbstractNamedTensor, I1::Block{1}, Irest...)
-    return copy(view(a, I1, Irest...))
-end
-function Base.getindex(a::AbstractNamedTensor, I1::AbstractVector, I2::Block{1})
-    return copy(view(a, I1, I2))
-end
-function Base.getindex(a::AbstractNamedTensor, I1::Block{1}, I2::AbstractVector)
-    return copy(view(a, I1, I2))
-end
-function Base.getindex(a::AbstractNamedTensor, I::Block{N}) where {N}
-    return copy(view(a, I))
-end
-
-end
diff --git a/test/Project.toml b/test/Project.toml
index 6cc5237..d7b94ed 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -2,7 +2,6 @@
 AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
-BlockArrays = "8e7c35d0-a365-5155-bbbb-fb81a777f24e"
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"
 ITensorBase = "4795dd04-0d67-49bb-8f44-b89c448a1dc7"
 ITensorPkgSkeleton = "3d388ab1-018a-49f4-ae50-18094d5f71ea"
@@ -29,7 +28,6 @@ path = ".."
 AbstractTrees = "0.4.5"
 Adapt = "4"
 Aqua = "0.8.9"
-BlockArrays = "1"
 Combinatorics = "1"
 ITensorBase = "0.9"
 ITensorPkgSkeleton = "0.3.42"
@@ -41,7 +39,7 @@ Random = "1.10"
 SafeTestsets = "0.1"
 StableRNGs = "1"
 Suppressor = "0.2"
-TensorAlgebra = "0.12.4, 0.13"
+TensorAlgebra = "0.14"
 TensorOperations = "5.3.1"
 TermInterface = "2"
 Test = "1.10"
diff --git a/test/test_blockarraysext.jl b/test/test_blockarraysext.jl
deleted file mode 100644
index 30e8ea0..0000000
--- a/test/test_blockarraysext.jl
+++ /dev/null
@@ -1,39 +0,0 @@
-using BlockArrays: Block, BlockArray
-using ITensorBase: inds, nameddims, unname, unnamed
-using Test: @test, @testset
-
-@testset "ITensorBaseBlockArraysExt" begin
-    elt = Float64
-
-    a = BlockArray{elt}(undef, [2, 3], [2, 3])
-    a[Block(1, 1)] = randn(elt, 2, 2)
-    a[Block(2, 1)] = randn(elt, 3, 2)
-    a[Block(1, 2)] = randn(elt, 2, 3)
-    a[Block(2, 2)] = randn(elt, 3, 3)
-    n = nameddims(a, ("i", "j"))
-    i, j = inds(n)
-    @test unnamed(n[i[Block(2)], j[Block(1)]]) == a[Block(2, 1)]
-    @test unnamed(n[Block(2), Block(1)]) == a[Block(2, 1)]
-    @test unnamed(n[Block(2, 1)]) == a[Block(2, 1)]
-    @test unnamed(n[i[Block(2)], j[Block.(1:2)]]) == a[Block(2), Block.(1:2)]
-    @test unnamed(n[Block(2), Block.(1:2)]) == a[Block(2), Block.(1:2)]
-    @test unnamed(n[i[Block.(1:2)], j[Block(1)]]) == a[Block.(1:2), Block(1)]
-    @test unnamed(n[Block.(1:2), Block(1)]) == a[Block.(1:2), Block(1)]
-    @test unnamed(n[Block.(1:2), Block.(1:2)]) == a[Block.(1:2), Block.(1:2)]
-
-    a = BlockArray{elt}(undef, [2, 3], [2, 3])
-    a[Block(1, 1)] = randn(elt, 2, 2)
-    a[Block(2, 1)] = randn(elt, 3, 2)
-    a[Block(1, 2)] = randn(elt, 2, 3)
-    a[Block(2, 2)] = randn(elt, 3, 3)
-    b = BlockArray{elt}(undef, [2, 3], [2, 3])
-    b[Block(1, 1)] = randn(elt, 2, 2)
-    b[Block(2, 1)] = randn(elt, 3, 2)
-    b[Block(1, 2)] = randn(elt, 2, 3)
-    b[Block(2, 2)] = randn(elt, 3, 3)
-    na = nameddims(a, ("i", "j"))
-    nb = nameddims(b, ("j", "i"))
-    nc = na .+ 2 .* nb
-    c = a + 2 * permutedims(b, (2, 1))
-    @test unname(nc, ("i", "j")) ≈ c
-end

From 80f957525f303e19c0f6f486b6a014a87bbf85eb Mon Sep 17 00:00:00 2001
From: Matthew Fishman <mfishman@flatironinstitute.org>
Date: Tue, 30 Jun 2026 15:36:36 -0400
Subject: [PATCH 2/4] Bump the docs TensorAlgebra compat to 0.14

The `docs` workspace member still bounded `TensorAlgebra` at the old version, which leaves the shared workspace compat empty once the root and tests require 0.14.
---
 docs/Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/Project.toml b/docs/Project.toml
index 836c95c..72492b6 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -16,5 +16,5 @@ ITensorBase = "0.9"
 ITensorFormatter = "0.2.27"
 Literate = "2"
 MatrixAlgebraKit = "0.2, 0.3, 0.4, 0.5, 0.6"
-TensorAlgebra = "0.12.4, 0.13"
+TensorAlgebra = "0.14"
 Test = "1.10"

From d30ea1f99d66197f9e1e6a002fc4328a6309ecd2 Mon Sep 17 00:00:00 2001
From: Matthew Fishman <mfishman@flatironinstitute.org>
Date: Tue, 30 Jun 2026 15:52:22 -0400
Subject: [PATCH 3/4] Bump the minor version to 0.10.0 for the breaking removal

Dropping the `BlockArrays` extension removes functionality downstream code may rely on, so this is a breaking release. Raise the workspace members' `ITensorBase` compat to `0.10` to match.
---
 Project.toml          | 2 +-
 docs/Project.toml     | 2 +-
 examples/Project.toml | 2 +-
 test/Project.toml     | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Project.toml b/Project.toml
index 20d4ede..7bdc422 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "ITensorBase"
 uuid = "4795dd04-0d67-49bb-8f44-b89c448a1dc7"
-version = "0.9.2"
+version = "0.10.0"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
 
 [workspace]
diff --git a/docs/Project.toml b/docs/Project.toml
index 72492b6..d10d035 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -12,7 +12,7 @@ path = ".."
 
 [compat]
 Documenter = "1"
-ITensorBase = "0.9"
+ITensorBase = "0.10"
 ITensorFormatter = "0.2.27"
 Literate = "2"
 MatrixAlgebraKit = "0.2, 0.3, 0.4, 0.5, 0.6"
diff --git a/examples/Project.toml b/examples/Project.toml
index 0e153f6..c1a24b5 100644
--- a/examples/Project.toml
+++ b/examples/Project.toml
@@ -6,5 +6,5 @@ MatrixAlgebraKit = "6c742aac-3347-4629-af66-fc926824e5e4"
 path = ".."
 
 [compat]
-ITensorBase = "0.9"
+ITensorBase = "0.10"
 MatrixAlgebraKit = "0.2, 0.3, 0.4, 0.5, 0.6"
diff --git a/test/Project.toml b/test/Project.toml
index d7b94ed..82515fd 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -29,7 +29,7 @@ AbstractTrees = "0.4.5"
 Adapt = "4"
 Aqua = "0.8.9"
 Combinatorics = "1"
-ITensorBase = "0.9"
+ITensorBase = "0.10"
 ITensorPkgSkeleton = "0.3.42"
 JLArrays = "0.2, 0.3"
 LinearAlgebra = "1.10"

From 8f0991fd549d40474635338781030c219187c7ab Mon Sep 17 00:00:00 2001
From: Matthew Fishman <mfishman@flatironinstitute.org>
Date: Tue, 30 Jun 2026 22:39:43 -0400
Subject: [PATCH 4/4] Drop the TensorAlgebra source pin now that 0.14 is
 registered

TensorAlgebra 0.14 is registered, so the `[compat]` bound resolves against the release and the branch pin is no longer needed.
---
 Project.toml | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Project.toml b/Project.toml
index 7bdc422..e8ccfe4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -30,10 +30,6 @@ Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
 Mooncake = "da2b9cff-9c12-43a0-ae48-6db2b0edb7d6"
 TensorOperations = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
 
-[sources.TensorAlgebra]
-rev = "mf/inline-strided-permute"
-url = "https://github.com/ITensor/TensorAlgebra.jl"
-
 [extensions]
 ITensorBaseAdaptExt = "Adapt"
 ITensorBaseMooncakeExt = "Mooncake"