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object Test {
// These warn because it can be statically shown they won't match.
/* warn */ Some(List(1)).isInstanceOf[Option[List[String]]]
/* warn */ Some(123).isInstanceOf[Option[Option[_]]]
/* warn */ Some(123).isInstanceOf[Option[String]]
/* warn */ Some(123).isInstanceOf[Option[List[String]]]
/* warn */ Some(123).isInstanceOf[Option[List[Int => String]]]
/* warn */ Some(123).isInstanceOf[Option[(String, Double)]]
/* warn */ Some(123).isInstanceOf[Option[String => Double]]
// These warn because you can't check at runtime.
/* warn */ (Some(List(1)): Any).isInstanceOf[Option[List[String]]]
/* warn */ (Some(123): Any).isInstanceOf[Option[Int]]
/* warn */ (Some(123): Any).isInstanceOf[Option[String]]
/* warn */ (Some(123): Any).isInstanceOf[Option[List[String]]]
/* warn */ (Some(123): Any).isInstanceOf[Option[List[Int => String]]]
/* warn */ (Some(123): Any).isInstanceOf[Option[(String, Double)]]
/* warn */ (Some(123): Any).isInstanceOf[Option[String => Double]]
// These don't warn.
/* nowarn */ Some(List(1)).isInstanceOf[Option[List[Int]]]
/* nowarn */ Some(123).isInstanceOf[Option[Int]]
/* nowarn */ Some(123).isInstanceOf[Some[Int]]
/* nowarn */ Some(123).isInstanceOf[AnyRef]
/* nowarn */ (Some(List(1)): Any).isInstanceOf[Option[_]]
/* nowarn */ (Some(123): Any).isInstanceOf[Option[_]]
/* nowarn */ (Some(123): Any).isInstanceOf[Some[_]]
/* nowarn */ (Some(123): Any).isInstanceOf[AnyRef]
}
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