61 lines
1.0 KiB
Rust
61 lines
1.0 KiB
Rust
// run-pass
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#![allow(unused_imports)]
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// aux-build:union.rs
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extern crate union;
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use std::mem::{size_of, align_of, zeroed};
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union U {
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a: u8,
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b: u16
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}
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fn local() {
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assert_eq!(size_of::<U>(), 2);
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assert_eq!(align_of::<U>(), 2);
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let u = U { a: 10 };
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unsafe {
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assert_eq!(u.a, 10);
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let U { a } = u;
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assert_eq!(a, 10);
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}
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let mut w = U { b: 0 };
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unsafe {
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assert_eq!(w.a, 0);
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assert_eq!(w.b, 0);
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w.a = 1;
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assert_eq!(w.a, 1);
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assert_eq!(w.b.to_le(), 1);
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}
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}
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fn xcrate() {
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assert_eq!(size_of::<union::U>(), 2);
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assert_eq!(align_of::<union::U>(), 2);
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let u = union::U { a: 10 };
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unsafe {
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assert_eq!(u.a, 10);
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let union::U { a } = u;
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assert_eq!(a, 10);
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}
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let mut w = union::U { b: 0 };
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unsafe {
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assert_eq!(w.a, 0);
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assert_eq!(w.b, 0);
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w.a = 1;
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assert_eq!(w.a, 1);
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assert_eq!(w.b.to_le(), 1);
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}
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}
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fn main() {
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local();
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xcrate();
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}
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