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