[J2KT] Extend casts readable with a cast to RAW and then to generic t…

…ype.

PiperOrigin-RevId: 719257894

transpiler/javatests/com/google/j2cl/readable/java/cast/CastGenerics.java

@@ -146,6 +146,10 @@ public <S, V extends Enum<V>> void testCastToMethodTypeVariable() {
     c = (V) o;
   }
 
+  public Foo<String> testCastToRawToGeneric(Foo<Object> foo) {
+    return (Foo<String>) (Foo) foo;
+  }
+
   /**
    * This method tests that J2CL correctly sets the Generic to its bound inside a method since
    * closure compiler cannot handle it.

transpiler/javatests/com/google/j2cl/readable/java/cast/output_closure/CastGenerics.impl.java.js.txt

@@ -118,6 +118,10 @@ class CastGenerics extends j_l_Object {
   c = (/**@type {Array<S>}*/ ($Arrays.$castTo(o, j_l_Object, 1)));
   c = (/**@type {V}*/ ($Casts.$to(o, Enum)));
  }
+ /** @nodts @return {Foo<?string>} */
+ m_testCastToRawToGeneric__cast_CastGenerics_Foo__cast_CastGenerics_Foo(/** Foo<*> */ foo) {
+  return /**@type {Foo<?string>}*/ (foo);
+ }
  /** @nodts @template TT */
  m_outerGenericMethod__void() {}
  /** @nodts @template EE @return {EE} */

transpiler/javatests/com/google/j2cl/readable/java/cast/output_kt/CastGenerics.kt.txt

@@ -60,6 +60,13 @@ open class CastGenerics<T, E: Number?> {
   c = o as V?
  }
 
+ @ObjCName("testCastToRawToGeneric")
+ open fun testCastToRawToGeneric(
+  @ObjCName("withCastCastGenerics_Foo") foo: CastGenerics.Foo<Any?>?
+ ): CastGenerics.Foo<String?>? {
+  return foo as CastGenerics.Foo<Any?>? as CastGenerics.Foo<String?>?
+ }
+
  @ObjCName("outerGenericMethod")
  open fun <TT: Enum<*>> outerGenericMethod() {
   open class Nested<SS> internal constructor() {