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#![feature(negative_impls)]
struct Managed;
impl !Send for Managed {}
impl !Sync for Managed {}
use std::cell::UnsafeCell;
struct MySync {
t: *mut u8
}
unsafe impl Sync for MySync {}
struct MyNotSync {
t: *mut u8
}
impl !Sync for MyNotSync {}
struct MyTypeWUnsafe {
t: UnsafeCell<u8>
}
struct MyTypeManaged {
t: Managed
}
fn is_sync<T: Sync>() {}
fn main() {
is_sync::<MySync>();
is_sync::<MyNotSync>();
//~^ ERROR `MyNotSync` cannot be shared between threads safely [E0277]
is_sync::<MyTypeWUnsafe>();
//~^ ERROR `UnsafeCell<u8>` cannot be shared between threads safely [E0277]
is_sync::<MyTypeManaged>();
//~^ ERROR `Managed` cannot be shared between threads safely [E0277]
}
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