1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test that attempt to freeze an `&mut` pointer while referent is
12 // claimed yields an error.
14 // Example from src/middle/borrowck/doc.rs
16 fn foo<'a>(mut t0: &'a mut int,
17 mut t1: &'a mut int) {
18 let p: &mut int = &mut *t0; // Claims `*t0`
19 let mut t2 = &t0; //~ ERROR cannot borrow `t0`
20 let q: &int = &**t2; // Freezes `*t0` but not through `*p`
21 *p += 1; // violates type of `*q`