mirror of
https://github.com/rust-lang/rust
synced 2024-11-05 20:45:15 +00:00
29 lines
508 B
Rust
29 lines
508 B
Rust
//@ run-pass
|
|
|
|
// Check that unsizing does not change which field is considered for niche layout.
|
|
|
|
#![allow(dead_code)]
|
|
|
|
#[derive(Clone)]
|
|
struct WideptrField<T: ?Sized> {
|
|
first: usize,
|
|
second: usize,
|
|
niche: NicheAtEnd,
|
|
tail: T,
|
|
}
|
|
|
|
#[derive(Clone)]
|
|
#[repr(C)]
|
|
struct NicheAtEnd {
|
|
arr: [u8; 7],
|
|
b: bool,
|
|
}
|
|
|
|
type Tail = [bool; 8];
|
|
|
|
fn main() {
|
|
assert_eq!(
|
|
core::mem::offset_of!(WideptrField<Tail>, niche),
|
|
core::mem::offset_of!(WideptrField<dyn Send>, niche)
|
|
);
|
|
}
|