rust/tests/ui/structs-enums/enum-discrim-autosizing.rs

// run-pass
#![allow(dead_code)]
#![allow(overflowing_literals)]

use std::mem::size_of;

enum Ei8 {
    Ai8 = -1,
    Bi8 = 0
}

enum Eu8 {
    Au8 = 0,
    Bu8 = 0x80
}

enum Ei16 {
    Ai16 = -1,
    Bi16 = 0x80
}

enum Eu16 {
    Au16 = 0,
    Bu16 = 0x8000
}

enum Ei32 {
    Ai32 = -1,
    Bi32 = 0x8000
}

enum Eu32 {
    Au32 = 0,
    Bu32 = 0x8000_0000
}

enum Ei64 {
    Ai64 = -1,
    Bi64 = 0x8000_0000
}

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);
    #[cfg(target_pointer_width = "64")]
    assert_eq!(size_of::<Ei64>(), 8);
    #[cfg(target_pointer_width = "32")]
    assert_eq!(size_of::<Ei64>(), 4);
}