c48cdfe8ee
`Waker::noop()` now returns a `&'static Waker` reference, so it can be passed directly to `Context` creation with no temporary lifetime issue.
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
LL| |#![feature(coverage_attribute)]
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LL| |#![feature(noop_waker)]
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LL| |// edition: 2021
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LL| |
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LL| 1|fn main() {
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LL| 17| for i in 0..16 {
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^16
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LL| 16| let future = async {
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LL| 16| if i >= 12 {
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LL| 4| println!("big");
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LL| 12| } else {
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LL| 12| println!("small");
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LL| 12| }
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LL| 16| };
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LL| 16| executor::block_on(future);
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LL| 16| }
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LL| 1|}
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LL| |
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LL| |mod executor {
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LL| | use core::future::Future;
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LL| | use core::pin::pin;
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LL| | use core::task::{Context, Poll, Waker};
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LL| |
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LL| | #[coverage(off)]
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LL| | pub fn block_on<F: Future>(mut future: F) -> F::Output {
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LL| | let mut future = pin!(future);
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LL| | let mut context = Context::from_waker(Waker::noop());
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LL| |
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LL| | loop {
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LL| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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LL| | break val;
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LL| | }
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LL| | }
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LL| | }
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LL| |}
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