gistfile1.scala

trait Constructable[T] {
  def construct: T
}

implicit object IntIsConstructable extends Constructable[Int] {
  def construct = 42
}

implicit object StringIsConstructable extends Constructable[String] {
  def construct = "Hello World"
}

def testIt[T](x: T)(implicit ctor: Constructable[T]) = {
  ctor.construct
}

thanks for this piece of learning..
def testIt[T](x: T)(implicit ctor: Constructable[T]){
println(ctor.construct +" "+ x)
}
scala> testIt[String] ("Ikenna" )
Hello World Ikenna