import scala.reflect.runtime.universe._
import scala.reflect.ClassTag

class Foo{
 import Test._
 def foo = {
  val expectedType = implicitly[TypeTag[R]]
  val classTag = implicitly[ClassTag[R]]
  val cl = classTag.runtimeClass.getClassLoader
  val cm = runtimeMirror(cl)
  val constructor = expectedType.tpe.member( termNames.CONSTRUCTOR ).asMethod
  val sig = constructor.info
  val sym = cm.classSymbol( classTag.runtimeClass )
  val cls = cm.reflectClass( sym )
  cls.reflectConstructor( constructor )( 5,"test" ).asInstanceOf[R]
 }
}

object Test extends App{
  case class R(
    sales : Int,
    name : String
  )
  val foo = new Foo
  println( foo.foo )
}