issue_3979_traits.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#[crate_id="issue_3979_traits#0.1"];

#[crate_type = "lib"];

pub trait Positioned {
  fn SetX(&mut self, int);
  fn X(&self) -> int;
}

pub trait Movable: Positioned {
  fn translate(&mut self, dx: int) {
    let x = self.X() + dx;
    self.SetX(x);
  }
}