aakashns · August 29, 2015 14:17
diff --git a/error.scala b/error.scala
 error: could not find implicit value for evidence parameter of type Group[Boolean]
diff --git a/error2.scala b/error2.scala
 error: No member of type class Group found for type Boolean
diff --git a/Group.scala b/Group.scala
 import annotation.implicitNotFound

 @implicitNotFound("No member of type class Group found for type ${T}")
 trait Group[T] {
  // code ..
 }
diff --git a/test.scala b/test.scala
 sum(Seq(true, false))
	import annotation.implicitNotFound

	@implicitNotFound("No member of type class Group found for type ${T}")
	trait Group[T] {
	// code ..
	}
No results found