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//@ run-pass
#![allow(dead_code)]
use std::mem::{size_of, align_of};
#[repr(i8)]
enum Ei8 {
Ai8 = 0,
Bi8 = 1
}
#[repr(u8)]
enum Eu8 {
Au8 = 0,
Bu8 = 1
}
#[repr(i16)]
enum Ei16 {
Ai16 = 0,
Bi16 = 1
}
#[repr(u16)]
enum Eu16 {
Au16 = 0,
Bu16 = 1
}
#[repr(i32)]
enum Ei32 {
Ai32 = 0,
Bi32 = 1
}
#[repr(u32)]
enum Eu32 {
Au32 = 0,
Bu32 = 1
}
#[repr(i64)]
enum Ei64 {
Ai64 = 0,
Bi64 = 1
}
#[repr(u64)]
enum Eu64 {
Au64 = 0,
Bu64 = 1
}
#[repr(isize)]
enum Eint {
Aint = 0,
Bint = 1
}
#[repr(usize)]
enum Euint {
Auint = 0,
Buint = 1
}
#[repr(u8)]
enum Eu8NonCLike<T> {
_None,
_Some(T),
}
#[repr(i64)]
enum Ei64NonCLike<T> {
_None,
_Some(T),
}
#[repr(u64)]
enum Eu64NonCLike<T> {
_None,
_Some(T),
}
pub fn main() {
assert_eq!(size_of::<Ei8>(), 1);
assert_eq!(size_of::<Eu8>(), 1);
assert_eq!(size_of::<Ei16>(), 2);
assert_eq!(size_of::<Eu16>(), 2);
assert_eq!(size_of::<Ei32>(), 4);
assert_eq!(size_of::<Eu32>(), 4);
assert_eq!(size_of::<Ei64>(), 8);
assert_eq!(size_of::<Eu64>(), 8);
assert_eq!(size_of::<Eint>(), size_of::<isize>());
assert_eq!(size_of::<Euint>(), size_of::<usize>());
assert_eq!(size_of::<Eu8NonCLike<()>>(), 1);
assert_eq!(size_of::<Ei64NonCLike<()>>(), 8);
assert_eq!(size_of::<Eu64NonCLike<()>>(), 8);
let u8_expected_size = round_up(9, align_of::<Eu64NonCLike<u8>>());
assert_eq!(size_of::<Eu64NonCLike<u8>>(), u8_expected_size);
let array_expected_size = round_up(28, align_of::<Eu64NonCLike<[u32; 5]>>());
assert_eq!(size_of::<Eu64NonCLike<[u32; 5]>>(), array_expected_size);
assert_eq!(size_of::<Eu64NonCLike<[u32; 6]>>(), 32);
assert_eq!(align_of::<Eu32>(), align_of::<u32>());
assert_eq!(align_of::<Eu64NonCLike<u8>>(), align_of::<u64>());
}
// Rounds x up to the next multiple of a
fn round_up(x: usize, a: usize) -> usize {
((x + (a - 1)) / a) * a
}
|
