mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 22:41:50 +00:00
20 lines
488 B
Rust
20 lines
488 B
Rust
#![feature(negative_impls)]
|
|
#![feature(marker_trait_attr)]
|
|
|
|
#[marker]
|
|
trait MyTrait {}
|
|
|
|
struct TestType<T>(::std::marker::PhantomData<T>);
|
|
|
|
unsafe impl<T: MyTrait + 'static> Send for TestType<T> {}
|
|
|
|
impl<T: MyTrait> !Send for TestType<T> {} //~ ERROR found both positive and negative implementation
|
|
|
|
unsafe impl<T: 'static> Send for TestType<T> {} //~ ERROR conflicting implementations
|
|
|
|
impl !Send for TestType<i32> {}
|
|
//~^ WARNING
|
|
//~| WARNING this will change its meaning
|
|
|
|
fn main() {}
|