interface ihello
{
  in void hello();
  out void cruel();
  out void world();

  behaviour
  {
    on hello: cruel;
    on hello: world;
  }
}

component hello_function_assign
{
  provides ihello h;

  behaviour
  {
    bool b = false;

    bool f ()
      {
        if (b)
          h.cruel ();
        else
          h.world ();
        return !b;
      }
    on h.hello(): b = f();
  }
}