| // check-pass |
| |
| use std::pin::Pin; |
| use std::task::{Context, Poll}; |
| |
| struct Foo; |
| |
| impl Foo { |
| fn pin_ref(self: Pin<&Self>) -> Pin<&Self> { self } |
| |
| fn pin_mut(self: Pin<&mut Self>) -> Pin<&mut Self> { self } |
| |
| fn pin_pin_pin_ref(self: Pin<Pin<Pin<&Self>>>) -> Pin<Pin<Pin<&Self>>> { self } |
| |
| fn pin_ref_impl_trait(self: Pin<&Self>) -> impl Clone + '_ { self } |
| |
| fn b(self: Pin<&Foo>, f: &Foo) -> Pin<&Foo> { self } |
| } |
| |
| type Alias<T> = Pin<T>; |
| impl Foo { |
| fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> Alias<&Self> { self } |
| } |
| |
| struct Bar<T: Unpin, U: Unpin> { |
| field1: T, |
| field2: U, |
| } |
| |
| impl<T: Unpin, U: Unpin> Bar<T, U> { |
| fn fields(self: Pin<&mut Self>) -> (Pin<&mut T>, Pin<&mut U>) { |
| let this = self.get_mut(); |
| (Pin::new(&mut this.field1), Pin::new(&mut this.field2)) |
| } |
| } |
| |
| trait AsyncBufRead { |
| fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) |
| -> Poll<std::io::Result<&[u8]>>; |
| } |
| |
| struct Baz(Vec<u8>); |
| |
| impl AsyncBufRead for Baz { |
| fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) |
| -> Poll<std::io::Result<&[u8]>> |
| { |
| Poll::Ready(Ok(&self.get_mut().0)) |
| } |
| } |
| |
| fn main() { |
| let mut foo = Foo; |
| { Pin::new(&foo).pin_ref() }; |
| { Pin::new(&mut foo).pin_mut() }; |
| { Pin::new(Pin::new(Pin::new(&foo))).pin_pin_pin_ref() }; |
| { Pin::new(&foo).pin_ref_impl_trait() }; |
| let mut bar = Bar { field1: 0u8, field2: 1u8 }; |
| { Pin::new(&mut bar).fields() }; |
| } |