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// 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() };
}
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