rust/src/test/compile-fail/borrowck-loan-in-overloaded-op.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.

#![feature(box_syntax)]

use std::ops::Add;

#[derive(Clone)]
struct foo(Box<usize>);

impl Add for foo {
    type Output = foo;

    fn add(self, f: foo) -> foo {
        let foo(box i) = self;
        let foo(box j) = f;
        foo(box() (i + j))
    }
}

fn main() {
    let x = foo(box 3);
    let _y = {x} + x.clone(); // the `{x}` forces a move to occur
    //~^ ERROR use of moved value: `x`
}