31 lines
903 B
Rust
31 lines
903 B
Rust
// 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.
|
|
|
|
#[feature(managed_boxes)];
|
|
|
|
fn borrow<'r, T>(x: &'r T) -> &'r T {x}
|
|
|
|
fn foo(cond: || -> bool, make_box: || -> @int) {
|
|
let mut y: ∫
|
|
loop {
|
|
let x = make_box();
|
|
|
|
// Here we complain because the resulting region
|
|
// of this borrow is the fn body as a whole.
|
|
y = borrow(x); //~ ERROR cannot root
|
|
|
|
assert_eq!(*x, *y);
|
|
if cond() { break; }
|
|
}
|
|
assert!(*y != 0);
|
|
}
|
|
|
|
fn main() {}
|