1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 enum Either<T, U> { Left(T), Right(U) }
13 fn f(x: &mut Either<int,f64>, y: &Either<int,f64>) -> int {
15 Either::Left(ref z) => {
16 *x = Either::Right(1.0);
24 let mut x: Either<int,f64> = Either::Left(3);
25 println!("{}", f(&mut x, &x)); //~ ERROR cannot borrow
29 let mut x: Either<int,f64> = Either::Left(3);
30 let y: &Either<int, f64> = &x;
31 let z: &mut Either<int, f64> = &mut x; //~ ERROR cannot borrow