rust/src/test/run-pass/regions-infer-borrow-scope-addr-of.rs

// Copyright 2012 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.

pub fn main() {
    let mut x = 4;

    for uint::range(0, 3) |i| {
        // ensure that the borrow in this alt
	// does not inferfere with the swap
	// below.  note that it would it you
	// naively borrowed &x for the lifetime
	// of the variable x, as we once did
        match i {
          i => {
            let y = &x;
            assert i < *y;
          }
        }
        let mut y = 4;
        y <-> x;
    }
}