Scala - obtain field names and field types from case class employing TypeTag

ProductExtension.scala

  import scala.reflect.runtime.universe.TypeTag

  implicit class ProductExtension[T <: Product : TypeTag](o: T) {
    def productElementNames: Iterator[String] = {
      import scala.reflect.runtime.universe._
      typeOf[T].members
        .collect { case m: MethodSymbol if m.isCaseAccessor => m.name.toString }
        .toList.reverse.toIterator
    }
     
    def productElementTypeNames: Iterator[String] = {
      import scala.reflect.runtime.universe._
      typeOf[T].members
        .collect { case m: MethodSymbol if m.isCaseAccessor => m.returnType.toString }
        .toList.reverse.toIterator
    }
  }

  test("ability to obtain list of field names from a case class") {
    val o = Explorer(id = 1, firstname = "Arne", lastname = "Saknussem", cartoon = Some("Journey to the Center of The Earth"))
    val names = o.productElementNames
    assertEquals(names.toList, List("id", "firstname", "lastname", "cartoon"))
  }

  test("ability to obtain list of field type names from a case class") {
    val o = Explorer(id = 1, firstname = "Arne", lastname = "Saknussem", cartoon = Some("Journey to the Center of The Earth"))
    val types = o.productElementTypeNames
    assertEquals(types.toList, List("Int", "String", "String", "Option[String]"))
  }

  case class Explorer(id: Int, firstname: String, lastname: String, cartoon: Option[String])