42 lines
981 B
Rust
42 lines
981 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// xfail-test
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trait Positioned<S> {
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fn SetX(&mut self, S);
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fn X(&self) -> S;
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}
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#[allow(default_methods)]
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trait Movable<S, T>: Positioned<T> {
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fn translate(&self, dx: T) {
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self.SetX(self.X() + dx);
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}
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}
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struct Point { x: int, y: int }
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impl Positioned<int> for Point {
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fn SetX(&mut self, x: int) {
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self.x = x;
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}
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fn X(&self) -> int {
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self.x
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}
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}
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impl Point: Movable<int, int>;
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pub fn main() {
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let p = Point{ x: 1, y: 2};
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p.translate(3);
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assert p.X() == 4;
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}
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