rust/src/test/ui/run-pass/array-slice-vec/vec-matching-legal-tail-element-borrow.rs

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(slice_patterns)]

pub fn main() {
    let x = &[1, 2, 3, 4, 5];
    let x: &[isize] = &[1, 2, 3, 4, 5];
    if !x.is_empty() {
        let el = match x {
            &[1, ref tail..] => &tail[0],
            _ => unreachable!()
        };
        println!("{}", *el);
    }
}