ZodSchemaClassExtender

src/util/extend.ts

@@ -6,18 +6,18 @@
 export type CommonKeys<A, B> = Extract<keyof A, keyof B>
 
 export type Extend<T extends readonly object[]> = (
-    T extends [
+    T extends readonly [
         infer Super,
         infer Self,
-        ...infer Rest extends object[],
+        ...infer Rest extends readonly object[],
     ]
         ? Pick<Self, CommonKeys<Self, Super>> extends Pick<Super, CommonKeys<Self, Super>>
-            ? Extend<[
+            ? Extend<readonly [
                 Omit<Super, CommonKeys<Self, Super>> & Self,
                 ...Rest,
             ]>
             : never
-        : T extends [infer Self]
+        : T extends readonly [infer Self]
             ? Self
             : {}
 )