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
|
//@ run-pass
#![allow(dead_code)]
// Test that pointers to extern types can be cast from/to usize,
// despite being !Sized.
#![feature(extern_types)]
extern "C" {
type A;
}
struct Foo {
x: u8,
tail: A,
}
struct Bar<T: ?Sized> {
x: u8,
tail: T,
}
#[cfg(target_pointer_width = "32")]
const MAGIC: usize = 0xdeadbeef;
#[cfg(target_pointer_width = "64")]
const MAGIC: usize = 0x12345678deadbeef;
fn main() {
assert_eq!((MAGIC as *const A) as usize, MAGIC);
assert_eq!((MAGIC as *const Foo) as usize, MAGIC);
assert_eq!((MAGIC as *const Bar<A>) as usize, MAGIC);
assert_eq!((MAGIC as *const Bar<Bar<A>>) as usize, MAGIC);
}
|
