47 lines
1.1 KiB
Rust
47 lines
1.1 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// exec-env:RUST_POISON_ON_FREE=1
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use std::gc::GC;
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fn testfn(cond: bool) {
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let mut x = box(GC) 3i;
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let mut y = box(GC) 4i;
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// borrow x and y
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let r_x = &*x;
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let r_y = &*y;
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let mut r = r_x;
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let mut exp = 3;
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if cond {
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r = r_y;
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exp = 4;
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}
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println!("*r = {}, exp = {}", *r, exp);
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assert_eq!(*r, exp);
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x = box(GC) 5i; //~ERROR cannot assign to `x` because it is borrowed
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y = box(GC) 6i; //~ERROR cannot assign to `y` because it is borrowed
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println!("*r = {}, exp = {}", *r, exp);
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assert_eq!(*r, exp);
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assert_eq!(x, box(GC) 5i);
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assert_eq!(y, box(GC) 6i);
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}
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pub fn main() {
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testfn(true);
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testfn(false);
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}
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