39 lines
937 B
Rust
39 lines
937 B
Rust
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
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!();
|
|
}
|
|
}
|