25 lines
511 B
Rust
25 lines
511 B
Rust
#[derive(PartialEq, Debug)]
|
|
struct A;
|
|
|
|
fn zst_ret() -> A {
|
|
A
|
|
}
|
|
|
|
fn use_zst() -> A {
|
|
let a = A;
|
|
a
|
|
}
|
|
|
|
fn main() {
|
|
// Not using the () type here, as writes of that type do not even have MIR generated.
|
|
// Also not assigning directly as that's array initialization, not assignment.
|
|
let zst_val = [1u8; 0];
|
|
|
|
assert_eq!(zst_ret(), A);
|
|
assert_eq!(use_zst(), A);
|
|
let x = 42 as *mut [u8; 0];
|
|
// Reading and writing is ok.
|
|
unsafe { *x = zst_val; }
|
|
unsafe { let _y = *x; }
|
|
}
|