Writing a generic cast function Scala

Question

I am trying to achieve to write a method that casts a value of Any to a specific type and returns option instead of throwing an exception like instanceOf. Scala does not beh

Answer 1

This is because of type erasure. At runtime, A in Option[A] is not known, so you are permitted to store a Some(3) in a variable of type Option[String].

The exception will occur when the value inside the option is accessed:

scala> val result = cast[String](2)
result: Option[String] = Some(2)

scala> result.get
java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
        at .(:10)
        at .()
        // ...