1 #![warn(rust_2018_idioms, single_use_lifetimes)]
2 #![allow(dead_code)]
3
4 use pin_project::{pin_project, UnsafeUnpin};
5 use std::{marker::PhantomPinned, pin::Pin};
6
is_unpin<T: Unpin>()7 fn is_unpin<T: Unpin>() {}
8
9 #[pin_project(UnsafeUnpin)]
10 pub struct Blah<T, U> {
11 field1: U,
12 #[pin]
13 field2: T,
14 }
15
16 unsafe impl<T: Unpin, U> UnsafeUnpin for Blah<T, U> {}
17
18 #[pin_project(UnsafeUnpin)]
19 pub struct OverlappingLifetimeNames<'pin, T, U> {
20 #[pin]
21 field1: T,
22 field2: U,
23 field3: &'pin (),
24 }
25
26 unsafe impl<T: Unpin, U> UnsafeUnpin for OverlappingLifetimeNames<'_, T, U> {}
27
28 #[test]
unsafe_unpin()29 fn unsafe_unpin() {
30 is_unpin::<Blah<(), PhantomPinned>>();
31 is_unpin::<OverlappingLifetimeNames<'_, (), ()>>();
32 }
33
34 #[test]
trivial_bounds()35 fn trivial_bounds() {
36 #[pin_project(UnsafeUnpin)]
37 pub struct NotImplementUnsafUnpin {
38 #[pin]
39 field: PhantomPinned,
40 }
41 }
42
43 #[test]
test()44 fn test() {
45 let mut x = OverlappingLifetimeNames { field1: 0, field2: 1, field3: &() };
46 let x = Pin::new(&mut x);
47 let y = x.as_ref().project_ref();
48 let _: Pin<&u8> = y.field1;
49 let _: &u8 = y.field2;
50 let y = x.project();
51 let _: Pin<&mut u8> = y.field1;
52 let _: &mut u8 = y.field2;
53 }
54