convert.scala

trait Convert[A, B] {
    def convert(a : A) : B
}

object Convert {
  implicit def convertCharInt = new Convert[Char, Int] {
    def convert(c: Char): Int = c.toInt
  }

  implicit def convertIntChar = new Convert[Int, Char] {
      def convert(i: Int): Char = i.toChar
  }
}

implicit class ConvertSyntax[A](a: A) {
    def convert[B]()(implicit ev: Convert[A, B]): B = ev.convert(a)
}

object Foo {
  val x : Char = 1.convert()
  val y : Int  = 'c'.convert()
}