fn f<T>(x: &[T]) -> T { ret x.(0); }

fn g(act: fn(&[int]) -> int ) -> int { ret act(~[1, 2, 3]); }

fn main() {
    assert (g(f) == 1);
    let f1: fn(&[str]) -> str  = f;
    assert (f1(~["x", "y", "z"]) == "x");
}