blob: 7d8a1528aba36973a5cc86d395b82a716d36772c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// Copyright 2014 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.
#![feature(box_syntax)]
struct Foo {
x: isize
}
impl Drop for Foo {
fn drop(&mut self) {
println!("drop {}", self.x);
}
}
fn main() {
let mut ptr: Box<_> = box Foo { x: 0 };
let mut test = |foo: &Foo| {
println!("access {}", foo.x);
ptr = box Foo { x: ptr.x + 1 };
println!("access {}", foo.x);
};
test(&*ptr);
//~^ ERROR: cannot borrow `*ptr` as immutable
}
|
