| use core::task::{Context, Poll, RawWaker, RawWakerVTable, Waker}; |
| |
| #[test] |
| fn poll_const() { |
| // test that the methods of `Poll` are usable in a const context |
| |
| const POLL: Poll<usize> = Poll::Pending; |
| |
| const IS_READY: bool = POLL.is_ready(); |
| assert!(!IS_READY); |
| |
| const IS_PENDING: bool = POLL.is_pending(); |
| assert!(IS_PENDING); |
| } |
| |
| #[test] |
| fn waker_const() { |
| const VOID_TABLE: RawWakerVTable = RawWakerVTable::new(|_| VOID_WAKER, |_| {}, |_| {}, |_| {}); |
| |
| const VOID_WAKER: RawWaker = RawWaker::new(&(), &VOID_TABLE); |
| |
| static WAKER: Waker = unsafe { Waker::from_raw(VOID_WAKER) }; |
| |
| static CONTEXT: Context<'static> = Context::from_waker(&WAKER); |
| |
| static WAKER_REF: &'static Waker = CONTEXT.waker(); |
| |
| WAKER_REF.wake_by_ref(); |
| } |