rust/tests/ui/nullable-pointer-size.rs
2024-02-16 20:02:50 +00:00

36 lines
662 B
Rust

//@ 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());
}