mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 15:23:46 +00:00
23 lines
432 B
Rust
23 lines
432 B
Rust
// run-pass
|
|
|
|
#![feature(ptr_metadata)]
|
|
|
|
use std::alloc::Layout;
|
|
use std::ptr::Pointee;
|
|
|
|
trait Foo {
|
|
type Bar;
|
|
}
|
|
|
|
impl Foo for () {
|
|
type Bar = ();
|
|
}
|
|
|
|
struct Wrapper1<T: Foo>(#[allow(unused_tuple_struct_fields)] <T as Foo>::Bar);
|
|
struct Wrapper2<T: Foo>(#[allow(unused_tuple_struct_fields)] <Wrapper1<T> as Pointee>::Metadata);
|
|
|
|
fn main() {
|
|
let _: Wrapper2<()> = Wrapper2(());
|
|
let _ = Layout::new::<Wrapper2<()>>();
|
|
}
|