13 lines
165 B
Rust
13 lines
165 B
Rust
trait double {
|
|
fn double() -> uint;
|
|
}
|
|
|
|
impl uint: double {
|
|
fn double() -> uint { self * 2u }
|
|
}
|
|
|
|
fn main() {
|
|
let x = @@3u;
|
|
assert x.double() == 6u;
|
|
}
|