mirror of https://github.com/rust-lang/rust
55 lines
1.3 KiB
Rust
55 lines
1.3 KiB
Rust
//@ run-pass
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#![feature(arbitrary_self_types)]
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#![feature(rustc_attrs)]
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use std::{
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rc::Rc,
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sync::Arc,
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pin::Pin,
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};
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trait Trait {
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fn by_rc(self: Rc<Self>) -> i64;
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fn by_arc(self: Arc<Self>) -> i64;
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fn by_pin_mut(self: Pin<&mut Self>) -> i64;
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fn by_pin_box(self: Pin<Box<Self>>) -> i64;
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fn by_pin_pin_pin_ref(self: Pin<Pin<Pin<&Self>>>) -> i64;
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}
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impl Trait for i64 {
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fn by_rc(self: Rc<Self>) -> i64 {
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*self
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}
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fn by_arc(self: Arc<Self>) -> i64 {
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*self
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}
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fn by_pin_mut(self: Pin<&mut Self>) -> i64 {
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*self
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}
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fn by_pin_box(self: Pin<Box<Self>>) -> i64 {
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*self
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}
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fn by_pin_pin_pin_ref(self: Pin<Pin<Pin<&Self>>>) -> i64 {
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*self
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}
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}
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fn main() {
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let rc = Rc::new(1i64) as Rc<dyn Trait>;
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assert_eq!(1, rc.by_rc());
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let arc = Arc::new(2i64) as Arc<dyn Trait>;
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assert_eq!(2, arc.by_arc());
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let mut value = 3i64;
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let pin_mut = Pin::new(&mut value) as Pin<&mut dyn Trait>;
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assert_eq!(3, pin_mut.by_pin_mut());
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let pin_box = Into::<Pin<Box<i64>>>::into(Box::new(4i64)) as Pin<Box<dyn Trait>>;
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assert_eq!(4, pin_box.by_pin_box());
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let value = 5i64;
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let pin_pin_pin_ref = Pin::new(Pin::new(Pin::new(&value))) as Pin<Pin<Pin<&dyn Trait>>>;
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assert_eq!(5, pin_pin_pin_ref.by_pin_pin_pin_ref());
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}
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