src/test/run-pass/volatile-fat-ptr.rs


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// Copyright 2016 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.

#![feature(volatile)]
use std::ptr::{read_volatile, write_volatile};

fn main() {
    let mut x: &'static str = "test";
    unsafe {
        let a = read_volatile(&x);
        assert_eq!(a, "test");
        write_volatile(&mut x, "foo");
        assert_eq!(x, "foo");
    }
}