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Editorial Team
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Asked: 2026-05-26T04:20:07+00:00

Consider the following Scala code def NOTImplementedIn[T<: AnyRef](t:T):String = throw new Exception(t.getClass.getName+: Input type

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Consider the following Scala code

def NOTImplementedIn[T<: AnyRef](t:T):String = 
  throw new Exception(t.getClass.getName+": Input type not implemented")

def NOTImplementedOut[T<: AnyRef](s:String):T = 
  throw new Exception("Output type not implemented")

In the first case, it is possible to infer the input type T. Is there any way to infer the output type T in the second case? I would like to include the type name in the exception.

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1 Answer

  1. Editorial Team

    Yes, using a Manifest.

    def NOTImplementedOut[T<: AnyRef](s:String)(implicit m: scala.reflect.Manifest[T]):T =
  throw new Exception(m.toString + ": Output type not implemented")
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