// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. struct F { mut f: ~[int] } fn impure(_v: &[int]) { } pub fn main() { let x = F {f: ~[3]}; match x { F {f: ref mut v} => { impure(*v); } } }