From 875959e9a173a6c16e8b3080c95e68738728198a Mon Sep 17 00:00:00 2001
From: Sheehan Olver <solver@mac.com>
Date: Fri, 5 Dec 2025 13:55:38 +0000
Subject: [PATCH 1/3] Introduce resizedata!_layout and resizing for broadcast
 arrays

---
 src/cache.jl  | 16 ++++++++++++++--
 src/padded.jl | 11 ++---------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/src/cache.jl b/src/cache.jl
index 9cac1810..3e3bcb06 100644
--- a/src/cache.jl
+++ b/src/cache.jl
@@ -226,7 +226,10 @@ end
 
 resizedata!(B::CachedArray, mn...) = resizedata!(MemoryLayout(B.data), MemoryLayout(B.array), B, mn...)
 resizedata!(B::AbstractCachedArray, mn...) = resizedata!(MemoryLayout(B.data), UnknownLayout(), B, mn...)
-resizedata!(A, mn...) = A # don't do anything
+resizedata!_layout(A, mn...) = A # don't do anything
+
+
+resizedata!(A, mn...) = resizedata!_layout(MemoryLayout(A), A, mn...)
 function resizedata!(A::AdjOrTrans, m, n)
     resizedata!(parent(A), n, m)
     A
@@ -615,4 +618,13 @@ CachedArray(data::AbstractMatrix, array::AbstractQ) = CachedArray(data, array, s
 CachedArray(data::AbstractMatrix{T}, array::AbstractQ{T}, datasize::NTuple{2,Int}) where T =
     CachedMatrix{T,typeof(data),typeof(array)}(data, array, datasize)
 
-length(A::CachedMatrix{<:T,<:AbstractMatrix{T},<:AbstractQ{T}}) where T = prod(size(A.array))
\ No newline at end of file
+length(A::CachedMatrix{<:T,<:AbstractMatrix{T},<:AbstractQ{T}}) where T = prod(size(A.array))
+
+
+
+###
+# resizedata! for types
+###
+
+
+resizedata!_layout(lay::BroadcastLayout, b, m...) = resizedata!.(arguments(lay, b), m...)
diff --git a/src/padded.jl b/src/padded.jl
index 5fbf5043..7cec0565 100644
--- a/src/padded.jl
+++ b/src/padded.jl
@@ -124,16 +124,12 @@ function rowsupport(lay::Union{PaddedColumns{Lay}, PaddedLayout{Lay}}, A, k) whe
     isempty(k̃) ? convert(typeof(rs), Base.OneTo(0)) : rs
 end
 
-function _vcat_resizedata!(::Union{AbstractPaddedLayout, DualLayout{<:PaddedRows}}, B, m...)
+function resizedata!_layout(::Union{AbstractPaddedLayout, DualLayout{<:PaddedRows}}, B, m...)
     any(iszero,m) || Base.checkbounds(paddeddata(B), m...)
     B
 end
-function _vcat_resizedata!(::Union{DualLayout{<:PaddedRows}, AbstractPaddedLayout}, B::Vcat{<:Any, 1}, m) # ambiguity
-    iszero(m) || Base.checkbounds(paddeddata(B), m)
-    B
-end
 
-function _vcat_resizedata!(_, B::Vcat{<:Any, 1}, n) 
+function resizedata!_layout(::ApplyLayout{typeof(vcat)}, B::AbstractVector, n) 
     m = n 
     for arg in arguments(B)
         m ≤ 0 && break
@@ -145,9 +141,6 @@ function _vcat_resizedata!(_, B::Vcat{<:Any, 1}, n)
     B
 end
 
-_vcat_resizedata!(_, B, m...) = B # by default we can't resize
-
-resizedata!(B::Vcat, m...) = _vcat_resizedata!(MemoryLayout(B), B, m...)
 
 cacheddata(B::Vcat) = Vcat(map(maybe_cacheddata, arguments(B))...)
 

From d71a24eb5732f322a0bcb01053189890bca7f1bd Mon Sep 17 00:00:00 2001
From: Sheehan Olver <solver@mac.com>
Date: Fri, 5 Dec 2025 14:03:08 +0000
Subject: [PATCH 2/3] Update padded.jl

---
 src/padded.jl | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/padded.jl b/src/padded.jl
index 7cec0565..4b542daf 100644
--- a/src/padded.jl
+++ b/src/padded.jl
@@ -124,11 +124,7 @@ function rowsupport(lay::Union{PaddedColumns{Lay}, PaddedLayout{Lay}}, A, k) whe
     isempty(k̃) ? convert(typeof(rs), Base.OneTo(0)) : rs
 end
 
-function resizedata!_layout(::Union{AbstractPaddedLayout, DualLayout{<:PaddedRows}}, B, m...)
-    any(iszero,m) || Base.checkbounds(paddeddata(B), m...)
-    B
-end
-
+resizedata!_layout(::Union{AbstractPaddedLayout, DualLayout{<:PaddedRows}}, B, m...) = B
 function resizedata!_layout(::ApplyLayout{typeof(vcat)}, B::AbstractVector, n) 
     m = n 
     for arg in arguments(B)

From 76c9ebf873737fa1dcd9c9abf04aba0d860bf6a7 Mon Sep 17 00:00:00 2001
From: Sheehan Olver <solver@mac.com>
Date: Fri, 5 Dec 2025 14:27:21 +0000
Subject: [PATCH 3/3] Update cache.jl

---
 src/cache.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cache.jl b/src/cache.jl
index 3e3bcb06..ebd49c3c 100644
--- a/src/cache.jl
+++ b/src/cache.jl
@@ -226,7 +226,7 @@ end
 
 resizedata!(B::CachedArray, mn...) = resizedata!(MemoryLayout(B.data), MemoryLayout(B.array), B, mn...)
 resizedata!(B::AbstractCachedArray, mn...) = resizedata!(MemoryLayout(B.data), UnknownLayout(), B, mn...)
-resizedata!_layout(A, mn...) = A # don't do anything
+resizedata!_layout(_, A, mn...) = A # don't do anything
 
 
 resizedata!(A, mn...) = resizedata!_layout(MemoryLayout(A), A, mn...)