mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-01 03:03:40 +00:00
31 lines
503 B
Rust
31 lines
503 B
Rust
// run-pass
|
|
#![allow(dead_code)]
|
|
use std::mem::size_of;
|
|
|
|
enum E {
|
|
A = 1,
|
|
B = 2,
|
|
C = 3,
|
|
}
|
|
|
|
struct S {
|
|
a: u16,
|
|
b: u8,
|
|
e: E,
|
|
}
|
|
|
|
fn main() {
|
|
assert_eq!(size_of::<E>(), 1);
|
|
assert_eq!(size_of::<Option<E>>(), 1);
|
|
assert_eq!(size_of::<Result<E, ()>>(), 1);
|
|
assert_eq!(size_of::<Option<S>>(), size_of::<S>());
|
|
let enone = None::<E>;
|
|
let esome = Some(E::A);
|
|
if let Some(..) = enone {
|
|
panic!();
|
|
}
|
|
if let None = esome {
|
|
panic!();
|
|
}
|
|
}
|