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// run-pass
#![allow(dead_code)]
#![allow(non_snake_case)]
trait Positioned {
fn SetX(&mut self, _: isize);
fn X(&self) -> isize;
}
trait Movable: Positioned {
fn translate(&mut self, dx: isize) {
let x = self.X();
self.SetX(x + dx);
}
}
struct Point { x: isize, y: isize }
impl Positioned for Point {
fn SetX(&mut self, x: isize) {
self.x = x;
}
fn X(&self) -> isize {
self.x
}
}
impl Movable for Point {}
pub fn main() {
let mut p = Point{ x: 1, y: 2};
p.translate(3);
assert_eq!(p.X(), 4);
}
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