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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 // Ensure that OIBIT checks `T` when it encounters a `PhantomData<T>` field, instead of checking
12 // the `PhantomData<T>` type itself (which almost always implements a "default" trait
13 // (`impl Trait for ..`))
15 #![feature(optin_builtin_traits)]
17 use std
::marker
::{PhantomData}
;
21 unsafe impl Zen
for .. {}
23 unsafe impl<'a
, T
: 'a
> Zen
for &'a T
where T
: Sync {}
25 struct Guard
<'a
, T
: 'a
> {
26 _marker
: PhantomData
<&'a T
>,
31 fn is_zen
<T
: Zen
>(_
: T
) {}
33 fn not_sync
<T
>(x
: Guard
<T
>) {
34 is_zen(x
) //~ error: `T: std::marker::Sync` is not satisfied
37 fn nested_not_sync
<T
>(x
: Nested
<Guard
<T
>>) {
38 is_zen(x
) //~ error: `T: std::marker::Sync` is not satisfied