src/test/run-pass/send_str_hashmap.rs

   1 // Copyright 2013 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 use std::collections::HashMap;
  12 use std::borrow::Cow;
  13
  14 use std::borrow::Cow::Borrowed as B;
  15 use std::borrow::Cow::Owned as O;
  16
  17 type SendStr = Cow<'static, str>;
  18
  19 fn main() {
  20     let mut map: HashMap<SendStr, usize> = HashMap::new();
  21     assert!(map.insert(B("foo"), 42).is_none());
  22     assert!(map.insert(O("foo".to_string()), 42).is_some());
  23     assert!(map.insert(B("foo"), 42).is_some());
  24     assert!(map.insert(O("foo".to_string()), 42).is_some());
  25
  26     assert!(map.insert(B("foo"), 43).is_some());
  27     assert!(map.insert(O("foo".to_string()), 44).is_some());
  28     assert!(map.insert(B("foo"), 45).is_some());
  29     assert!(map.insert(O("foo".to_string()), 46).is_some());
  30
  31     let v = 46;
  32
  33     assert_eq!(map.get(&O("foo".to_string())), Some(&v));
  34     assert_eq!(map.get(&B("foo")), Some(&v));
  35
  36     let (a, b, c, d) = (50, 51, 52, 53);
  37
  38     assert!(map.insert(B("abc"), a).is_none());
  39     assert!(map.insert(O("bcd".to_string()), b).is_none());
  40     assert!(map.insert(B("cde"), c).is_none());
  41     assert!(map.insert(O("def".to_string()), d).is_none());
  42
  43     assert!(map.insert(B("abc"), a).is_some());
  44     assert!(map.insert(O("bcd".to_string()), b).is_some());
  45     assert!(map.insert(B("cde"), c).is_some());
  46     assert!(map.insert(O("def".to_string()), d).is_some());
  47
  48     assert!(map.insert(O("abc".to_string()), a).is_some());
  49     assert!(map.insert(B("bcd"), b).is_some());
  50     assert!(map.insert(O("cde".to_string()), c).is_some());
  51     assert!(map.insert(B("def"), d).is_some());
  52
  53     assert_eq!(map.get("abc"), Some(&a));
  54     assert_eq!(map.get("bcd"), Some(&b));
  55     assert_eq!(map.get("cde"), Some(&c));
  56     assert_eq!(map.get("def"), Some(&d));
  57
  58     assert_eq!(map.get(&B("abc")), Some(&a));
  59     assert_eq!(map.get(&B("bcd")), Some(&b));
  60     assert_eq!(map.get(&B("cde")), Some(&c));
  61     assert_eq!(map.get(&B("def")), Some(&d));
  62 }