| //@ known-bug: #138564 |
| //@compile-flags: -Copt-level=0 -Cdebuginfo=2 --crate-type lib |
| #![feature(unsize, dispatch_from_dyn, arbitrary_self_types)] |
| |
| use std::marker::Unsize; |
| use std::ops::{Deref, DispatchFromDyn}; |
| |
| #[repr(align(16))] |
| pub struct MyPointer<T: ?Sized>(*const T); |
| |
| impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<MyPointer<U>> for MyPointer<T> {} |
| impl<T: ?Sized> Deref for MyPointer<T> { |
| type Target = T; |
| fn deref(&self) -> &T { |
| unimplemented!() |
| } |
| } |
| |
| pub trait Trait { |
| fn foo(self: MyPointer<Self>) {} |
| } |
| |
| // make sure some usage of `<dyn Trait>::foo` makes it to codegen |
| pub fn user() -> *const () { |
| <dyn Trait>::foo as *const () |
| } |
