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Commit | Line | Data |
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b7449926 XL |
1 | // run-pass |
2 | #![allow(non_camel_case_types)] | |
223e47cc | 3 | |
223e47cc LB |
4 | |
5 | trait to_str { | |
1a4d82fc | 6 | fn to_string_(&self) -> String; |
223e47cc LB |
7 | } |
8 | ||
c34b1796 | 9 | impl to_str for isize { |
1a4d82fc | 10 | fn to_string_(&self) -> String { self.to_string() } |
223e47cc LB |
11 | } |
12 | ||
1a4d82fc JJ |
13 | impl<T:to_str> to_str for Vec<T> { |
14 | fn to_string_(&self) -> String { | |
15 | format!("[{}]", | |
16 | self.iter() | |
17 | .map(|e| e.to_string_()) | |
18 | .collect::<Vec<String>>() | |
c1a9b12d | 19 | .join(", ")) |
223e47cc LB |
20 | } |
21 | } | |
22 | ||
23 | pub fn main() { | |
62682a34 | 24 | assert_eq!(1.to_string_(), "1".to_string()); |
c30ab7b3 | 25 | assert_eq!((vec![2, 3, 4]).to_string_(), "[2, 3, 4]".to_string()); |
223e47cc | 26 | |
1a4d82fc JJ |
27 | fn indirect<T:to_str>(x: T) -> String { |
28 | format!("{}!", x.to_string_()) | |
223e47cc | 29 | } |
c30ab7b3 | 30 | assert_eq!(indirect(vec![10, 20]), "[10, 20]!".to_string()); |
223e47cc | 31 | |
1a4d82fc | 32 | fn indirect2<T:to_str>(x: T) -> String { |
223e47cc LB |
33 | indirect(x) |
34 | } | |
c30ab7b3 | 35 | assert_eq!(indirect2(vec![1]), "[1]!".to_string()); |
223e47cc | 36 | } |