mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-09 15:13:57 +00:00
37 lines
607 B
Rust
37 lines
607 B
Rust
// run-pass
|
|
#![allow(dead_code)]
|
|
#![allow(non_snake_case)]
|
|
|
|
use std::ops::Add;
|
|
|
|
trait Positioned<S> {
|
|
fn SetX(&mut self, _: S);
|
|
fn X(&self) -> S;
|
|
}
|
|
|
|
trait Movable<S: Add<Output=S>>: Positioned<S> {
|
|
fn translate(&mut self, dx: S) {
|
|
let x = self.X() + dx;
|
|
self.SetX(x);
|
|
}
|
|
}
|
|
|
|
struct Point { x: isize, y: isize }
|
|
|
|
impl Positioned<isize> for Point {
|
|
fn SetX(&mut self, x: isize) {
|
|
self.x = x;
|
|
}
|
|
fn X(&self) -> isize {
|
|
self.x
|
|
}
|
|
}
|
|
|
|
impl Movable<isize> for Point {}
|
|
|
|
pub fn main() {
|
|
let mut p = Point{ x: 1, y: 2};
|
|
p.translate(3);
|
|
assert_eq!(p.X(), 4);
|
|
}
|