File: small-enums-with-fields.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,245,420 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (33 lines) | stat: -rw-r--r-- 884 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
//@ run-pass
use std::mem::size_of;

#[derive(PartialEq, Debug)]
enum Either<T, U> { Left(T), Right(U) }

macro_rules! check {
    ($t:ty, $sz:expr, $($e:expr, $s:expr),*) => {{
        assert_eq!(size_of::<$t>(), $sz);
        $({
            static S: $t = $e;
            let v: $t = $e;
            assert_eq!(S, v);
            assert_eq!(format!("{:?}", v), $s);
            assert_eq!(format!("{:?}", S), $s);
        });*
    }}
}

pub fn main() {
    check!(Option<u8>, 2,
           None, "None",
           Some(129), "Some(129)");
    check!(Option<i16>, 4,
           None, "None",
           Some(-20000), "Some(-20000)");
    check!(Either<u8, i8>, 2,
           Either::Left(132), "Left(132)",
           Either::Right(-32), "Right(-32)");
    check!(Either<u8, i16>, 4,
           Either::Left(132), "Left(132)",
           Either::Right(-20000), "Right(-20000)");
}