rust/src/test/run-pass/obj-as.rs

// xfail-boot
// xfail-boot
// xfail-stage0

obj big() {
  fn one() -> int { ret 1; }
  fn two() -> int { ret 2; }
  fn three() -> int { ret 3; }
}

type small = obj {
               fn one() -> int;
             };

fn main() {

  let big b = big();
  assert (b.one() == 1);
  assert (b.two() == 2);
  assert (b.three() == 3);

  let small s = b as small;
  assert (s.one() == 1);
}