//@ run-pass
fn even(x: usize) -> bool {
if x < 2 {
return false;
} else if x == 2 { return true; } else { return even(x - 2); }
}
fn foo(x: usize) {
if even(x) {
println!("{}", x);
} else {
panic!();
pub fn main() { foo(2); }