| // 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. |
| |
| |
| fn borrow<T>(x: &T) -> &T {x} |
| |
| fn foo<C, M>(mut cond: C, mut make_box: M) where |
| C: FnMut() -> bool, |
| M: FnMut() -> Box<isize>, |
| { |
| let mut y: &isize; |
| 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 `*x` does not live long enough |
| |
| assert_eq!(*x, *y); |
| if cond() { break; } |
| } |
| assert!(*y != 0); |
| } |
| |
| fn main() {} |
