rust/src/test/compile-fail/issue-4500.rs
Niko Matsakis 2b67d88809 Rewrite the coercion code to be more readable, more sound, and to reborrow when
needed.

Regarding soundness: there was a subtle bug in how it was done before; see the
compile-fail test for an example.

Regarding reborrowing: reborrowing allows mut and const
slices/borrowed-pointers to be used with pure fns that expect immutable data.

r=brson
2013-01-28 10:01:59 -08:00

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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 main () {
let mut _p: & int = & 4;
_p = &*~3; //~ ERROR illegal borrow
}