src/test/run-pass/foreach-external-iterators-hashmap.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11
  12 #![feature(collections)]
  13
  14 extern crate collections;
  15
  16 use std::collections::HashMap;
  17
  18 pub fn main() {
  19     let mut h = HashMap::new();
  20     let kvs = [(1, 10), (2, 20), (3, 30)];
  21     for &(k,v) in &kvs {
  22         h.insert(k,v);
  23     }
  24     let mut x = 0;
  25     let mut y = 0;
  26     for (&k,&v) in &h {
  27         x += k;
  28         y += v;
  29     }
  30     assert_eq!(x, 6);
  31     assert_eq!(y, 60);
  32 }