#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(trim_prefix_suffix)]
fn main() {
    let v = &[10, 40, 30];
    assert_eq!(v.trim_prefix(& [10]), & [40, 30] [..]);
    assert_eq!(v.trim_prefix(& [10, 40]), & [30] [..]);
    assert_eq!(v.trim_prefix(& [10, 40, 30]), & [] [..]);
    assert_eq!(v.trim_prefix(& [50]), & [10, 40, 30] [..]);
    assert_eq!(v.trim_prefix(& [10, 50]), & [10, 40, 30] [..]);
    let prefix: &str = "he";
    assert_eq!(b"hello".trim_prefix(prefix.as_bytes()), b"llo".as_ref());
}