From 0ad65a74e4d6b9ecb25572f07c5d1fbc3e1e6bb0 Mon Sep 17 00:00:00 2001
From: Orjan Ameye <orjan.ameye@hotmail.com>
Date: Thu, 23 Jul 2026 18:53:46 +0200
Subject: [PATCH 1/3] fix: make SLH scattering field concretely typed

SMatrix carries a hidden length parameter L, so declaring the field as
SMatrix{N,N,ST} left L free and rendered the field abstract. Add L to
the struct and an inner constructor that infers it, preserving the
existing SLH{N,ST,LT,HT}(...) calling convention.
---
 src/SLH.jl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/SLH.jl b/src/SLH.jl
index 210c4fd..c5b4e77 100644
--- a/src/SLH.jl
+++ b/src/SLH.jl
@@ -95,10 +95,15 @@ SLH triple with scattering matrix `S`, Lindblad vector `L`, and Hamiltonian `H`.
 
 See also [`▷`](@ref), [`⊞`](@ref), [`feedback`](@ref)
 """
-struct SLH{N,ST,LT,HT}
-    scattering::SMatrix{N,N,ST}
+struct SLH{N,ST,LT,HT,L}
+    scattering::SMatrix{N,N,ST,L}
     lindblad::SVector{N,LT}
     hamiltonian::HT
+    function SLH{N,ST,LT,HT}(
+        S::SMatrix{N,N,ST,L}, lindblad::SVector{N,LT}, H::HT
+    ) where {N,ST,LT,HT,L}
+        return new{N,ST,LT,HT,L}(S, lindblad, H)
+    end
 end
 
 """

From 5b01bb54d429964c6aefc4f1d07e7a7d543b3f3e Mon Sep 17 00:00:00 2001
From: Orjan Ameye <orjan.ameye@hotmail.com>
Date: Thu, 23 Jul 2026 18:54:29 +0200
Subject: [PATCH 2/3] bump to 0.4.1

---
 Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index 8bb11f2..7f35f22 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "QuantumInputOutput"
 uuid = "18f9eda6-924c-47c7-a881-996695cfd7c6"
-version = "0.4.0"
+version = "0.4.1"
 
 [deps]
 DataInterpolations = "82cc6244-b520-54b8-b5a6-8a565e85f1d0"

From 7bdde5fb540c21af3441f25cd3cbb968e8318b92 Mon Sep 17 00:00:00 2001
From: Orjan Ameye <orjan.ameye@hotmail.com>
Date: Thu, 23 Jul 2026 21:08:25 +0200
Subject: [PATCH 3/3] format

---
 src/SLH.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SLH.jl b/src/SLH.jl
index c5b4e77..34bc2d0 100644
--- a/src/SLH.jl
+++ b/src/SLH.jl
@@ -100,7 +100,9 @@ struct SLH{N,ST,LT,HT,L}
     lindblad::SVector{N,LT}
     hamiltonian::HT
     function SLH{N,ST,LT,HT}(
-        S::SMatrix{N,N,ST,L}, lindblad::SVector{N,LT}, H::HT
+        S::SMatrix{N,N,ST,L},
+        lindblad::SVector{N,LT},
+        H::HT,
     ) where {N,ST,LT,HT,L}
         return new{N,ST,LT,HT,L}(S, lindblad, H)
     end