rust/src/test/run-pass/int-conversion-coherence.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.

// xfail-test
//
// Problem here is that transactions aren't implemented for integer literal
// inference.

trait plus {
    fn plus() -> int;
}

impl foo of plus for uint { fn plus() -> int { self as int + 20 } }
impl foo of plus for int { fn plus() -> int { self + 10 } }

fn main() {
    assert 10.plus() == 20;
}