rust/tests/ui/coercion/issue-26905-rpass.rs
2024-02-16 20:02:50 +00:00

22 lines
498 B
Rust

//@ run-pass
#![feature(unsize, coerce_unsized)]
// Verfies that PhantomData is ignored for DST coercions
use std::marker::{Unsize, PhantomData};
use std::ops::CoerceUnsized;
struct MyRc<T: ?Sized> {
_ptr: *const T,
_boo: PhantomData<T>,
}
impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<MyRc<U>> for MyRc<T>{ }
fn main() {
let data = [1, 2, 3];
let iter = data.iter();
let x = MyRc { _ptr: &iter, _boo: PhantomData };
let _y: MyRc<dyn Iterator<Item=&u32>> = x;
}