#![feature(arbitrary_self_types, async_await, await_macro, futures_api, pin)]
-use std::pin::PinBox;
-use std::pin::PinMut;
+use std::pin::Pin;
use std::future::Future;
use std::sync::{
Arc,
atomic::{self, AtomicUsize},
};
-use std::future::FutureObj;
use std::task::{
- Context, Poll, Wake,
- Spawn, SpawnObjError,
+ LocalWaker, Poll, Wake,
local_waker_from_nonlocal,
};
}
}
-struct NoopSpawner;
-impl Spawn for NoopSpawner {
- fn spawn_obj(&mut self, _: FutureObj<'static, ()>) -> Result<(), SpawnObjError> {
- Ok(())
- }
-}
-
struct WakeOnceThenComplete(bool);
fn wake_and_yield_once() -> WakeOnceThenComplete { WakeOnceThenComplete(false) }
impl Future for WakeOnceThenComplete {
type Output = ();
- fn poll(mut self: PinMut<Self>, cx: &mut Context) -> Poll<()> {
+ fn poll(mut self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<()> {
if self.0 {
Poll::Ready(())
} else {
- cx.waker().wake();
+ lw.wake();
self.0 = true;
Poll::Pending
}
F: FnOnce(u8) -> Fut,
Fut: Future<Output = u8>,
{
- let mut fut = PinBox::new(f(9));
+ let mut fut = Box::pinned(f(9));
let counter = Arc::new(Counter { wakes: AtomicUsize::new(0) });
let waker = local_waker_from_nonlocal(counter.clone());
- let spawner = &mut NoopSpawner;
- let cx = &mut Context::new(&waker, spawner);
-
assert_eq!(0, counter.wakes.load(atomic::Ordering::SeqCst));
- assert_eq!(Poll::Pending, fut.as_pin_mut().poll(cx));
+ assert_eq!(Poll::Pending, fut.as_mut().poll(&waker));
assert_eq!(1, counter.wakes.load(atomic::Ordering::SeqCst));
- assert_eq!(Poll::Ready(9), fut.as_pin_mut().poll(cx));
+ assert_eq!(Poll::Ready(9), fut.as_mut().poll(&waker));
}
fn main() {