rust/src/test/compile-fail/borrowck-loan-local-as-both-mut-and-imm.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.

use core::either::{Either, Left, Right};

    fn f(x: &mut Either<int,float>, y: &Either<int,float>) -> int {
        match *y {
            Left(ref z) => {
                *x = Right(1.0);
                *z
            }
            _ => fail!()
        }
    }

    fn g() {
        let mut x: Either<int,float> = Left(3);
        io::println(f(&mut x, &x).to_str()); //~ ERROR cannot borrow
    }

    fn h() {
        let mut x: Either<int,float> = Left(3);
        let y: &Either<int, float> = &x;
        let z: &mut Either<int, float> = &mut x; //~ ERROR cannot borrow
        *z = *y;
    } 

    fn main() {}