demo.scala

import reflect.runtime.universe._
import reflect.runtime.currentMirror
import scala.tools.reflect.ToolBox

class Demo[T: TypeTag] {
  def runTest(): Any = {
    val tb = currentMirror.mkToolBox()
    val companion = typeOf[T].typeSymbol.companion
    tb.eval(q"$companion.test")
  }
}

object X {
  class Foo
  object Foo { def test = 1 }

  class Bar
  object Bar { def test = "abc" }
}

new Demo[X.Foo].runTest
new Demo[X.Bar].runTest