From 62968b9409e32acfaf08be418980f25754e47fb0 Mon Sep 17 00:00:00 2001
From: Daniel VandenHeuvel <95613936+DanielVandH@users.noreply.github.com>
Date: Thu, 30 Jan 2025 15:03:41 +0000
Subject: [PATCH] Sub-blockbandwidths for vector

---
 Project.toml             | 2 +-
 src/interfaceimpl.jl     | 4 ++++
 test/test_blockbanded.jl | 5 +++++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index d39b7d9..fbc68ec 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "BlockBandedMatrices"
 uuid = "ffab5731-97b5-5995-9138-79e8c1846df0"
-version = "0.13.3"
+version = "0.13.4"
 
 [deps]
 ArrayLayouts = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"
diff --git a/src/interfaceimpl.jl b/src/interfaceimpl.jl
index 1b59d7e..1b50475 100644
--- a/src/interfaceimpl.jl
+++ b/src/interfaceimpl.jl
@@ -81,3 +81,7 @@ sublayout(::DiagonalLayout{L}, inds::Type{<:NTuple{2,BS}}) where {L,BS<:BlockSli
 blockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
 blockbandwidths(A::BlockedMatrix{<:Any,<:Diagonal,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = bandwidths(A.blocks)
 subblockbandwidths(A::BlockedMatrix{<:Any,<:Any,<:NTuple{2,BlockedOneTo{Int,<:AbstractUnitRange{Int}}}}) = (0,0)
+
+
+## BlockVector
+subblockbandwidths(a::AbstractBlockVector) = (blocksize(a,1)-1, 0)
\ No newline at end of file
diff --git a/test/test_blockbanded.jl b/test/test_blockbanded.jl
index ca8b2a9..35de623 100644
--- a/test/test_blockbanded.jl
+++ b/test/test_blockbanded.jl
@@ -247,6 +247,11 @@ import BlockBandedMatrices: MemoryLayout, ColumnMajor, BroadcastStyle,
         f(s) = s.block_starts.data
         @inferred(f(s))
     end
+
+    @testset "BlockVector" begin
+        s = BlockVector(1:21, 1:6)
+        @test BlockBandedMatrices.subblockbandwidths(s) == (5, 0)
+    end
 end
 
 end # module