rust/src/test/run-pass/borrowck-mut-uniq.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.

type ints = {sum: ~int, values: ~[int]};

fn add_int(x: &mut ints, v: int) {
    *x.sum += v;
    let mut values = ~[];
    x.values <-> values;
    values.push(v);
    x.values <-> values;
}

fn iter_ints(x: &ints, f: fn(x: &int) -> bool) {
    let l = x.values.len();
    uint::range(0, l, |i| f(&x.values[i]))
}

fn main() {
    let mut ints = ~{sum: ~0, values: ~[]};
    add_int(ints, 22);
    add_int(ints, 44);

    for iter_ints(ints) |i| {
        error!("int = %d", *i);
    }

    error!("ints=%?", ints);
}