src/test/run-pass/borrowck-preserve-cond-box.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 // exec-env:RUST_POISON_ON_FREE=1
  12
  13 fn testfn(cond: bool) {
  14     let mut x = @3;
  15     let mut y = @4;
  16
  17     // borrow x and y
  18     let mut r_x = &*x;
  19     let mut r_y = &*y;
  20     let mut r = r_x, exp = 3;
  21
  22     if cond {
  23         r = r_y;
  24         exp = 4;
  25     }
  26
  27     debug!("*r = %d, exp = %d", *r, exp);
  28     assert!(*r == exp);
  29
  30     x = @5;
  31     y = @6;
  32
  33     debug!("*r = %d, exp = %d", *r, exp);
  34     assert!(*r == exp);
  35 }
  36
  37 pub fn main() {
  38     testfn(true);
  39     testfn(false);
  40 }