mirror of https://github.com/rust-lang/rust
52 lines
1.8 KiB
Rust
52 lines
1.8 KiB
Rust
//@ run-pass
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use std::borrow::Cow;
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use std::borrow::Cow::{Borrowed as B, Owned as O};
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use std::collections::HashMap;
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type SendStr = Cow<'static, str>;
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fn main() {
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let mut map: HashMap<SendStr, usize> = HashMap::new();
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assert!(map.insert(B("foo"), 42).is_none());
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assert!(map.insert(O("foo".to_string()), 42).is_some());
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assert!(map.insert(B("foo"), 42).is_some());
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assert!(map.insert(O("foo".to_string()), 42).is_some());
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assert!(map.insert(B("foo"), 43).is_some());
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assert!(map.insert(O("foo".to_string()), 44).is_some());
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assert!(map.insert(B("foo"), 45).is_some());
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assert!(map.insert(O("foo".to_string()), 46).is_some());
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let v = 46;
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assert_eq!(map.get(&O("foo".to_string())), Some(&v));
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assert_eq!(map.get(&B("foo")), Some(&v));
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let (a, b, c, d) = (50, 51, 52, 53);
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assert!(map.insert(B("abc"), a).is_none());
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assert!(map.insert(O("bcd".to_string()), b).is_none());
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assert!(map.insert(B("cde"), c).is_none());
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assert!(map.insert(O("def".to_string()), d).is_none());
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assert!(map.insert(B("abc"), a).is_some());
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assert!(map.insert(O("bcd".to_string()), b).is_some());
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assert!(map.insert(B("cde"), c).is_some());
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assert!(map.insert(O("def".to_string()), d).is_some());
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assert!(map.insert(O("abc".to_string()), a).is_some());
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assert!(map.insert(B("bcd"), b).is_some());
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assert!(map.insert(O("cde".to_string()), c).is_some());
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assert!(map.insert(B("def"), d).is_some());
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assert_eq!(map.get("abc"), Some(&a));
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assert_eq!(map.get("bcd"), Some(&b));
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assert_eq!(map.get("cde"), Some(&c));
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assert_eq!(map.get("def"), Some(&d));
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assert_eq!(map.get(&B("abc")), Some(&a));
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assert_eq!(map.get(&B("bcd")), Some(&b));
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assert_eq!(map.get(&B("cde")), Some(&c));
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assert_eq!(map.get(&B("def")), Some(&d));
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}
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