extern int $int$;

interface ihello
{
  in void hello(out int i);

  behaviour
  {
    on hello: {}
  }
}

component hellooutparam
{
  provides ihello h;
  requires iworld w;

  behaviour
  {
    on h.hello(i): {
      int j;
      w.world(j);
      i = j;
    }
  }
}

interface iworld
{
  in void world(out int i);

  behaviour
  {
    on world: {}
  }
}