// -*- rust -*-
iter two() -> int { put 0; put 1; }

fn main() {
    let a: [mutable int] = [mutable -1, -1, -1, -1];
    let p: int = 0;
    for each i: int in two() {
        for each j: int in two() { a[p] = 10 * i + j; p += 1; }
    }
    assert (a[0] == 0);
    assert (a[1] == 1);
    assert (a[2] == 10);
    assert (a[3] == 11);
}