26 lines
883 B
Rust
26 lines
883 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.
|
|
|
|
// Issue #8624. Tests that reborrowing the contents of an `&'b mut`
|
|
// pointer which is backed by another `&'a mut` can only be done
|
|
// for `'a` (which must be a sublifetime of `'b`).
|
|
|
|
fn copy_borrowed_ptr<'a, 'b>(p: &'a mut &'b mut int) -> &'b mut int {
|
|
&mut **p //~ ERROR cannot infer
|
|
}
|
|
|
|
fn main() {
|
|
let mut x = 1;
|
|
let mut y = &mut x;
|
|
let z = copy_borrowed_ptr(&mut y);
|
|
*y += 1;
|
|
*z += 1;
|
|
}
|