1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(unsize, coerce_unsized)]
13 // Verfies that non-PhantomData ZSTs still cause coercions to fail.
14 // They might have additional semantics that we don't want to bulldoze.
16 use std::marker::{Unsize, PhantomData};
17 use std::ops::CoerceUnsized;
19 struct NotPhantomData<T: ?Sized>(PhantomData<T>);
21 struct MyRc<T: ?Sized> {
23 _boo: NotPhantomData<T>,
26 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<MyRc<U>> for MyRc<T>{ } //~ERROR
30 let iter = data.iter();
31 let x = MyRc { _ptr: &iter, _boo: NotPhantomData(PhantomData) };
32 let _y: MyRc<Iterator<Item=&u32>> = x;