如何使scala方法参数类型成为可以转换为给定类型的多个类型的集合？

trait ConvertibleTo[T] {
  def convert(value: Any): Option[T]
}

implicit object IntConvertibleToDouble extends ConvertibleTo[Double] {
  def convert(value: Any): Option[Double] = value match {
    case i: Int => Some(i.toDouble)
    case _ => None
  }
}

implicit object StringConvertibleToDouble extends ConvertibleTo[Double] {
  def convert(value: Any): Option[Double] = value match {
    case s: String => Some(s.toDouble)
    case _ => None
  }
}

implicit object BooleanConvertibleToDouble extends ConvertibleTo[Double] {
  def convert(value: Any): Option[Double] = value match {
    case b: Boolean => Some(if (b) 1.0 else 0.0)
    case _ => None
  }
}

def convertToDouble[T](value: T)(implicit converter: ConvertibleTo[Double]): Option[Double] = {
  converter.convert(value)
}

val intValue = 42
val doubleValue = convertToDouble(intValue) // Some(42.0)