Scala Type check Try Success parameter

a.scala

import org.scalatest.FreeSpec

import scala.reflect.ClassTag
import scala.util.{Failure, Success, Try}

class Data(a: => AnyRef) {
  def get() = a
}

class TypeCheckingBranches extends FreeSpec {

  "Type checking should" - {

    "Success(a: A)" in {
      assert(1 === execute[String](new Data("a")))
    }

    "Success(_)" in {
      assert(2 === execute[String](new Data(List(1))))
    }

    "Failure(t)" in {
      assert(3 === execute[String](new Data(throw new RuntimeException)))
    }

  }

  def execute[A](input: Data)(implicit ct: ClassTag[A]): Int = {
    Try(input.get()) match {
      case Success(x: A) if ct.runtimeClass.isInstance(x)=> 1
      case Success(_) => 2
      case Failure(e) => 3
    }
  }

}