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