pos.rs

fn pos(pos: int, len: uint) -> uint {
  let ilen = len as int;
  let result = match pos {
        p if p < 0 && ilen + p < 0 => 0,
        p if p < 0                => ilen + p,
        p                         => p
  } as uint;
  result
}

#[test]
fn test_slice_pos(){
  let p = pos(-1, 10);
}