From a5b7b2080623e744e9998b1bc55551a221e5c07c Mon Sep 17 00:00:00 2001
From: Adrian Gierakowski <agierakowski@gmail.com>
Date: Thu, 20 Nov 2025 09:04:15 +0100
Subject: [PATCH 1/3] tests: add for case for issue: 753

---
 tests/specs/issues/issue753.txt | 46 +++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 tests/specs/issues/issue753.txt

diff --git a/tests/specs/issues/issue753.txt b/tests/specs/issues/issue753.txt
new file mode 100644
index 00000000..926e6394
--- /dev/null
+++ b/tests/specs/issues/issue753.txt
@@ -0,0 +1,46 @@
+~~ lineWidth: 80, indentWidth: 2, memberExpression.linePerExpression: true ~~
+== function args ==
+const startingFrom = Mylib.map(DateTime.now, now => DateTime.startOf(now, "day"));
+
+const func = () =>
+  function() {
+    const startingFrom = Mylib.map(DateTime.now, now => DateTime.startOf(now, "day"));
+  }
+
+
+[expect]
+const startingFrom = Mylib.map(
+  DateTime.now,
+  now => DateTime.startOf(now, "day"),
+);
+
+const func = () =>
+  function() {
+    const startingFrom = Mylib.map(
+      DateTime.now,
+      now => DateTime.startOf(now, "day"),
+    );
+  };
+
+== function args same line length ==
+const startingFroom = Mylib.map(DateTime.now, now => DateTime.startOf(now, "day"));
+
+const func = () =>
+  function() {
+    const startingF = Mylib.map(DateTime.now, now => DateTime.startOf(now, "day"));
+  }
+
+
+[expect]
+const startingFroom = Mylib.map(
+  DateTime.now,
+  now => DateTime.startOf(now, "day"),
+);
+
+const func = () =>
+  function() {
+    const startingF = Mylib.map(
+      DateTime.now,
+      now => DateTime.startOf(now, "day"),
+    );
+  };

From 7ad13542c7d747f32d2540b2000f3844a301d0b9 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Thu, 20 Nov 2025 10:33:08 +0000
Subject: [PATCH 2/3] fix: improve formatting of arrow functions as arguments

This change modifies `allows_inline_multi_line` to restrict arrow functions with expression bodies from being inline multi-line. This ensures that if such an arrow function overflows the line width, it forces the parent call expression to break its arguments onto multiple lines, rather than allowing a partial split that results in inconsistent formatting.

Fixes #753
Fixes #686
---
 src/generation/generate.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/generation/generate.rs b/src/generation/generate.rs
index f978a04b..dadb6274 100644
--- a/src/generation/generate.rs
+++ b/src/generation/generate.rs
@@ -9793,8 +9793,8 @@ fn allows_inline_multi_line<'a>(node: Node<'a>, context: &Context<'a>, has_sibli
           _ => allows_inline_multi_line(as_expr.type_ann.into(), context, has_siblings),
         }
     }
+    Node::ArrowExpr(arrow) => matches!(arrow.body, BlockStmtOrExpr::BlockStmt(_)),
     Node::FnExpr(_)
-    | Node::ArrowExpr(_)
     | Node::ObjectLit(_)
     | Node::ArrayLit(_)
     | Node::ObjectPat(_)

From fc1269f54b412512adc06953a7577b0a2622396d Mon Sep 17 00:00:00 2001
From: Adrian Gierakowski <agierakowski@gmail.com>
Date: Thu, 20 Nov 2025 12:36:19 +0100
Subject: [PATCH 3/3] tests: add for case for issue: 686

---
 tests/specs/issues/issue0686.txt | 45 ++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 tests/specs/issues/issue0686.txt

diff --git a/tests/specs/issues/issue0686.txt b/tests/specs/issues/issue0686.txt
new file mode 100644
index 00000000..46d53cad
--- /dev/null
+++ b/tests/specs/issues/issue0686.txt
@@ -0,0 +1,45 @@
+~~ lineWidth: 80, indentWidth: 2, memberExpression.linePerExpression: true ~~
+== generator ==
+const createTestData = () =>
+  function*() {
+    const startingFrom = yield* Effect.map(DateTime.now, now => DateTime.startOf(now, "day"));
+
+    return HashSet.make(DateTime.toEpochMillis(startingFrom));
+  };
+
+
+[expect]
+const createTestData = () =>
+  function*() {
+    const startingFrom = yield* Effect.map(
+      DateTime.now,
+      now => DateTime.startOf(now, "day"),
+    );
+
+    return HashSet.make(DateTime.toEpochMillis(startingFrom));
+  };
+
+== function ==
+const func = () =>
+  function() {
+    const startingFrom = Effect.map(DateTime.now, now => DateTime.startOf(now, 'day'))
+
+    return myObj
+      .myMethod({
+        missionType: otherObj.prop.nested,
+      });
+  };
+
+[expect]
+const func = () =>
+  function() {
+    const startingFrom = Effect.map(
+      DateTime.now,
+      now => DateTime.startOf(now, "day"),
+    );
+
+    return myObj
+      .myMethod({
+        missionType: otherObj.prop.nested,
+      });
+  };