time.scala

def time[R](opname: String)(block: => R) = {
 val start_time = System.nanoTime()
 var success = true
 try {
   block
 } catch {
   case ex: Throwable => {
   success = false;
   throw ex
   }
 } finally {
   val diff = System.nanoTime() - start_time
   println(opname + " " + diff + " "+success)
 }
}

def f():Integer = {

  val answer = time("a") {
    val r = new Random()
    if (r.nextInt(100) > 50)
      throw new java.io.IOException("Boom")
    else
      "42" 
  }

println ("the answer, "+answer+" is of type "+answer.getClass())

val seven:Integer = time("b") {
 7
 }

println ("seven is of type "+seven.getClass())

return seven 
}

f()