gistfile1.scala

  import shapeless._
  import shapeless.HList._

  import Report._
  import Chronograph._

  val sample = ReportLine(1,1,Micros)
  def toHList = Generic.product[ReportLine].to _

  val sampleH = toHList(sample)

  object stringfy extends Poly1 {
      implicit def caseLong = at[Long](_.toString)
  }

  sampleH map stringfy

/*
[error] /Users/pedrofurla/dev/projects/slick/slick-perf/src/main/scala/exec/Chronograph.scala:103: could not find implicit value for parameter mapper: shapeless.ops.hlist.Mapper[exec.shapes.stringfy.type,shapeless.::[Int,shapeless.::[exec.Chronograph.Chronon,shapeless.::[exec.Chronograph.TimeUnit,shapeless.HNil]]]]
[error]   sampleH map stringfy
[error]           ^
[error] one error found

*/