mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-11 08:05:12 +00:00
45 lines
677 B
Rust
45 lines
677 B
Rust
//@ run-pass
|
|
#![allow(dead_code)]
|
|
#![allow(unused_comparisons)]
|
|
|
|
use std::mem;
|
|
|
|
#[repr(packed)]
|
|
struct P1<T, S> {
|
|
a: T,
|
|
b: u8,
|
|
c: S
|
|
}
|
|
|
|
#[repr(packed(2))]
|
|
struct P2<T, S> {
|
|
a: T,
|
|
b: u8,
|
|
c: S
|
|
}
|
|
|
|
#[repr(C, packed(4))]
|
|
struct P4C<T, S> {
|
|
a: T,
|
|
b: u8,
|
|
c: S
|
|
}
|
|
|
|
macro_rules! check {
|
|
($t:ty, $align:expr, $size:expr) => ({
|
|
assert_eq!(mem::align_of::<$t>(), $align);
|
|
assert_eq!(mem::size_of::<$t>(), $size);
|
|
});
|
|
}
|
|
|
|
pub fn main() {
|
|
check!(P1<u8, u8>, 1, 3);
|
|
check!(P1<u64, u16>, 1, 11);
|
|
|
|
check!(P2<u8, u8>, 1, 3);
|
|
check!(P2<u64, u16>, 2, 12);
|
|
|
|
check!(P4C<u8, u8>, 1, 3);
|
|
check!(P4C<u16, u64>, 4, 12);
|
|
}
|