26 lines
723 B
Rust
26 lines
723 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.
|
|
|
|
fn borrow(v: &int, f: &fn(x: &int)) {
|
|
f(v);
|
|
}
|
|
|
|
fn box_imm() {
|
|
let mut v = ~3;
|
|
do borrow(v) |w| {
|
|
v = ~4; //~ ERROR cannot assign to `v` because it is borrowed
|
|
assert_eq!(*v, 3);
|
|
assert_eq!(*w, 4);
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
}
|