rust/src/test/run-pass/block-iter-2.rs

// Copyright 2012-2014 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.

// ignore-fast

fn iter_vec<T>(v: ~[T], f: |&T|) { for x in v.iter() { f(x); } }

pub fn main() {
    let v = ~[1, 2, 3, 4, 5];
    let mut sum = 0;
    iter_vec(v.clone(), |i| {
        iter_vec(v.clone(), |j| {
            sum += *i * *j;
        });
    });
    error!("{:?}", sum);
    assert_eq!(sum, 225);
}