Fix

packages/effect-fc/src/Lens.ts

@@ -73,26 +73,27 @@ export const fromSubscriptionRef = <A>(
 
 export const map = <A, ER, RR, EW, RW, B>(
     self: Lens<A, ER, RR, EW, RW>,
-    get: (a: A) => B,
+    options: {
-    set: {
+        readonly get: (a: A) => B,
+        readonly set: {
             (b: B): (parent: A) => A
             (parent: A, b: B): A
         },
-): Lens<B, ER, RR, EW, RW> => {
+    }
-    const setF = (parent: A, b: B) => set.length >= 2
+): Lens<B, ER, RR, EW, RW> => make({
-        ? (set as (parent: A, b: B) => A)(parent, b)
+    get: Effect.map(self.get, options.get),
-        : (set as (b: B) => (parent: A) => A)(b)(parent)
+    changes: Stream.map(self.changes, options.get),
-
-    return make({
-        get: Effect.map(self.get, get),
-        changes: Stream.map(self.changes, get),
     modify: <C, E1 = never, R1 = never>(
         f: (b: B) => Effect.Effect<readonly [C, B], E1, R1>
     ) => self.modify(a =>
-            Effect.flatMap(f(get(a)), ([c, next]) => Effect.succeed([c, setF(a, next)] as const))
+        Effect.flatMap(f(options.get(a)), ([c, next]) => Effect.succeed([
+            c,
+            options.set.length >= 2
+                ? (options.set as (parent: A, b: B) => A)(a, next)
+                : (options.set as (b: B) => (parent: A) => A)(next)(a),
+        ] as const))
     ),
 })
-}
 
 export const mapEffect = <A, ER, RR, EW, RW, B, EGet = never, RGet = never, ESet = never, RSet = never>(
     self: Lens<A, ER, RR, EW, RW>,