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
34
35
|
// run-pass
#![allow(dead_code)]
use std::mem;
enum E<T> { Thing(isize, T), Nothing((), ((), ()), [i8; 0]) }
struct S<T>(isize, T);
// These are macros so we get useful assert messages.
macro_rules! check_option {
($T:ty) => {
assert_eq!(mem::size_of::<Option<$T>>(), mem::size_of::<$T>());
}
}
macro_rules! check_fancy {
($T:ty) => {
assert_eq!(mem::size_of::<E<$T>>(), mem::size_of::<S<$T>>());
}
}
macro_rules! check_type {
($T:ty) => {{
check_option!($T);
check_fancy!($T);
}}
}
pub fn main() {
check_type!(&'static isize);
check_type!(Box<isize>);
check_type!(extern "C" fn());
}
|
