| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Ensure that OIBIT checks `T` when it encounters a `PhantomData<T>` field, instead of checking |
| // the `PhantomData<T>` type itself (which almost always implements a "default" trait |
| // (`impl Trait for ..`)) |
| |
| #![feature(optin_builtin_traits)] |
| |
| use std::marker::{PhantomData}; |
| |
| unsafe trait Zen {} |
| |
| unsafe impl Zen for .. {} |
| |
| unsafe impl<'a, T: 'a> Zen for &'a T where T: Sync {} |
| |
| struct Guard<'a, T: 'a> { |
| _marker: PhantomData<&'a T>, |
| } |
| |
| struct Nested<T>(T); |
| |
| fn is_zen<T: Zen>(_: T) {} |
| |
| fn not_sync<T>(x: Guard<T>) { |
| is_zen(x) //~ error: `T: std::marker::Sync` is not satisfied |
| } |
| |
| fn nested_not_sync<T>(x: Nested<Guard<T>>) { |
| is_zen(x) //~ error: `T: std::marker::Sync` is not satisfied |
| } |
| |
| fn main() {} |