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

   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.
   4 //
   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.
  10
  11 use core::either::{Either, Left, Right};
  12
  13     fn f(x: &mut Either<int,float>, y: &Either<int,float>) -> int {
  14         match *y {
  15             Left(ref z) => {
  16                 *x = Right(1.0);
  17                 *z
  18             }
  19             _ => fail!()
  20         }
  21     }
  22
  23     fn g() {
  24         let mut x: Either<int,float> = Left(3);
  25         io::println(f(&mut x, &x).to_str()); //~ ERROR conflicts with prior loan
  26     }
  27
  28     fn h() {
  29         let mut x: Either<int,float> = Left(3);
  30         let y: &Either<int, float> = &x;
  31         let z: &mut Either<int, float> = &mut x; //~ ERROR conflicts with prior loan
  32         *z = *y;
  33     }
  34
  35     fn main() {}