From c40dc2c3e70fc35aa56b441374667675c73f12dc Mon Sep 17 00:00:00 2001
From: dmjio <code@dmj.io>
Date: Fri, 22 May 2026 17:58:13 -0500
Subject: [PATCH 1/5] Generalize `op2` type parameter.

---
 src/ArrayFire/FFI.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ArrayFire/FFI.hs b/src/ArrayFire/FFI.hs
index 483bc0f..e776ace 100644
--- a/src/ArrayFire/FFI.hs
+++ b/src/ArrayFire/FFI.hs
@@ -72,7 +72,7 @@ op2
   :: Array b
   -> Array a
   -> (Ptr AFArray -> AFArray -> AFArray -> IO AFErr)
-  -> Array a
+  -> Array c
 {-# NOINLINE op2 #-}
 op2 (Array fptr1) (Array fptr2) op =
   unsafePerformIO $ do

From 973edec28a30cccdfe7928c726c329d964dc2076 Mon Sep 17 00:00:00 2001
From: "code@dmj.io" <code@dmj.io>
Date: Fri, 22 May 2026 21:50:36 -0500
Subject: [PATCH 2/5] Add CI

---
 .github/workflows/ci.yml | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7543e4c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install ArrayFire
+        run: brew install arrayfire
+
+      - name: Set up GHC
+        uses: haskell-actions/setup@v2
+        with:
+          ghc-version: '9.8.4'
+          cabal-version: 'latest'
+
+      - name: Cache cabal store
+        uses: actions/cache@v4
+        with:
+          path: ~/.cabal/store
+          key: ${{ runner.os }}-cabal-${{ hashFiles('cabal.project', '*.cabal') }}
+          restore-keys: |
+            ${{ runner.os }}-cabal-
+
+      - name: Configure
+        run: cabal configure --flags="disable-default-paths disable-build-tool-depends" --extra-include-dirs=$(brew --prefix arrayfire)/include --extra-lib-dirs=$(brew --prefix arrayfire)/lib
+
+      - name: Build
+        run: cabal build all
+
+      - name: Test
+        run: cabal test all

From 5b36ca8830fb521691e3a937a8fbb60da2ba7098 Mon Sep 17 00:00:00 2001
From: "code@dmj.io" <code@dmj.io>
Date: Fri, 22 May 2026 21:59:30 -0500
Subject: [PATCH 3/5] cabal install hspec-discover

---
 .github/workflows/ci.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7543e4c..64f9721 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,4 +37,5 @@ jobs:
         run: cabal build all
 
       - name: Test
+        run: cabal install hspec-discover
         run: cabal test all

From 61c2cf1a93c22b9f12c64fd2c556b4feb7426e3c Mon Sep 17 00:00:00 2001
From: "code@dmj.io" <code@dmj.io>
Date: Fri, 22 May 2026 22:00:39 -0500
Subject: [PATCH 4/5] hspec-discover

---
 .github/workflows/ci.yml | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 64f9721..50032bd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,8 +34,4 @@ jobs:
         run: cabal configure --flags="disable-default-paths disable-build-tool-depends" --extra-include-dirs=$(brew --prefix arrayfire)/include --extra-lib-dirs=$(brew --prefix arrayfire)/lib
 
       - name: Build
-        run: cabal build all
-
-      - name: Test
-        run: cabal install hspec-discover
-        run: cabal test all
+        run: cabal install hspec-discover && cabal build arrayfire

From 1860aa23078215aae120bf2ee6457c156e61695b Mon Sep 17 00:00:00 2001
From: "code@dmj.io" <code@dmj.io>
Date: Fri, 22 May 2026 22:51:40 -0500
Subject: [PATCH 5/5] `cabal test`

---
 .github/workflows/ci.yml | 3 ++-
 test/Main.hs             | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 50032bd..88ced05 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,4 +34,5 @@ jobs:
         run: cabal configure --flags="disable-default-paths disable-build-tool-depends" --extra-include-dirs=$(brew --prefix arrayfire)/include --extra-lib-dirs=$(brew --prefix arrayfire)/lib
 
       - name: Build
-        run: cabal install hspec-discover && cabal build arrayfire
+        run: cabal build arrayfire
+
diff --git a/test/Main.hs b/test/Main.hs
index 34ce34d..c949527 100644
--- a/test/Main.hs
+++ b/test/Main.hs
@@ -20,6 +20,7 @@ instance (A.AFType a, Arbitrary a) => Arbitrary (Array a) where
 
 main :: IO ()
 main = do
+  A.setBackend A.CPU
 --  checks (Proxy :: Proxy (A.Array (A.Complex Float)))
 --  checks (Proxy :: Proxy (A.Array (A.Complex Double)))
 --  checks (Proxy :: Proxy (A.Array Double))