class T(value: Any) extends ClassfileAnnotation
 
object Holder {
   final val as = Array(1, 2, 3)
   final val a = 1
   final val cint = classOf[Int]
}

import Holder._
 
@T(classOf[Int])
@T(cint) // error: annotation argument needs to be a constant; found: cint
@T(Array("", "", "")) // error: annotation argument needs to be a constant; found: as
@T(as) // error: annotation argument needs to be a constant; found: as
@T(1)
@T(a)
class Target