rust/tests/ui/traits/pointee-deduction.rs
2024-02-16 20:02:50 +00:00

23 lines
399 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(dead_code)] <T as Foo>::Bar);
struct Wrapper2<T: Foo>(#[allow(dead_code)] <Wrapper1<T> as Pointee>::Metadata);
fn main() {
let _: Wrapper2<()> = Wrapper2(());
let _ = Layout::new::<Wrapper2<()>>();
}