40 lines
705 B
Rust
40 lines
705 B
Rust
// run-pass
|
|
#![allow(dead_code)]
|
|
#![allow(non_snake_case)]
|
|
|
|
// There is some other borrowck bug, so we make the stuff not mut.
|
|
|
|
|
|
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<S> { x: S, y: S }
|
|
|
|
impl<S: Clone> Positioned<S> for Point<S> {
|
|
fn SetX(&mut self, x: S) {
|
|
self.x = x;
|
|
}
|
|
fn X(&self) -> S {
|
|
self.x.clone()
|
|
}
|
|
}
|
|
|
|
impl<S: Clone + Add<Output=S>> Movable<S> for Point<S> {}
|
|
|
|
pub fn main() {
|
|
let mut p = Point{ x: 1, y: 2};
|
|
p.translate(3);
|
|
assert_eq!(p.X(), 4);
|
|
}
|