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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.
// aux-build:union.rs
extern crate union;
use std::mem::{size_of, align_of, zeroed};
union U {
a: u8,
b: u16
}
fn local() {
assert_eq!(size_of::<U>(), 2);
assert_eq!(align_of::<U>(), 2);
let u = U { a: 10 };
unsafe {
assert_eq!(u.a, 10);
let U { a } = u;
assert_eq!(a, 10);
}
let mut w = U { b: 0 };
unsafe {
assert_eq!(w.a, 0);
assert_eq!(w.b, 0);
w.a = 1;
assert_eq!(w.a, 1);
assert_eq!(w.b.to_le(), 1);
}
}
fn xcrate() {
assert_eq!(size_of::<union::U>(), 2);
assert_eq!(align_of::<union::U>(), 2);
let u = union::U { a: 10 };
unsafe {
assert_eq!(u.a, 10);
let union::U { a } = u;
assert_eq!(a, 10);
}
let mut w = union::U { b: 0 };
unsafe {
assert_eq!(w.a, 0);
assert_eq!(w.b, 0);
w.a = 1;
assert_eq!(w.a, 1);
assert_eq!(w.b.to_le(), 1);
}
}
fn main() {
local();
xcrate();
}
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