src/tests.ts

@@ -59,20 +59,24 @@ class Box<T> {
         return "prout" as const
     }
 
-    method<
-        C extends typeof Box & Class<I>,
-        I extends Box<any>
+    newBox<
+        C extends Class<I, ConstructorParameters<typeof Box>>,
+        I extends Box<any>,
+        T,
     >(
         // this: Omit<BaseClass<T>, "constructor"> & { ["constructor"]: Class<I> }
-        this: { ["constructor"]: C }
+        this: { ["constructor"]: C | Class<I, ConstructorParameters<typeof Box>> },
+        value: T,
     ) {
         // this.otherMethod()
-        return new this.constructor(69)
+        return new this.constructor(value)
     }
 }
 
+class UnrelatedClass {}
+
 class SuperBox<T> extends Box<T> {
     declare ["constructor"]: typeof SuperBox
 }
 
-console.log(new Superclass().method())
+const value = new SuperBox(69).newBox(69)