| use core::pin::Pin; |
| |
| #[test] |
| fn pin_const() { |
| // test that the methods of `Pin` are usable in a const context |
| |
| const POINTER: &'static usize = &2; |
| |
| const PINNED: Pin<&'static usize> = Pin::new(POINTER); |
| const PINNED_UNCHECKED: Pin<&'static usize> = unsafe { Pin::new_unchecked(POINTER) }; |
| assert_eq!(PINNED_UNCHECKED, PINNED); |
| |
| const INNER: &'static usize = Pin::into_inner(PINNED); |
| assert_eq!(INNER, POINTER); |
| |
| const INNER_UNCHECKED: &'static usize = unsafe { Pin::into_inner_unchecked(PINNED) }; |
| assert_eq!(INNER_UNCHECKED, POINTER); |
| |
| const REF: &'static usize = PINNED.get_ref(); |
| assert_eq!(REF, POINTER); |
| |
| // Note: `pin_mut_const` tests that the methods of `Pin<&mut T>` are usable in a const context. |
| // A const fn is used because `&mut` is not (yet) usable in constants. |
| const fn pin_mut_const() { |
| let _ = Pin::new(&mut 2).into_ref(); |
| let _ = Pin::new(&mut 2).get_mut(); |
| let _ = unsafe { Pin::new(&mut 2).get_unchecked_mut() }; |
| } |
| |
| pin_mut_const(); |
| } |