38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
LL| |#![feature(coverage_attribute)]
|
|
LL| |#![feature(noop_waker)]
|
|
LL| |// edition: 2021
|
|
LL| |
|
|
LL| 1|fn main() {
|
|
LL| 17| for i in 0..16 {
|
|
^16
|
|
LL| 16| let future = async {
|
|
LL| 16| if i >= 12 {
|
|
LL| 4| println!("big");
|
|
LL| 12| } else {
|
|
LL| 12| println!("small");
|
|
LL| 12| }
|
|
LL| 16| };
|
|
LL| 16| executor::block_on(future);
|
|
LL| 16| }
|
|
LL| 1|}
|
|
LL| |
|
|
LL| |mod executor {
|
|
LL| | use core::future::Future;
|
|
LL| | use core::pin::pin;
|
|
LL| | use core::task::{Context, Poll, Waker};
|
|
LL| |
|
|
LL| | #[coverage(off)]
|
|
LL| | pub fn block_on<F: Future>(mut future: F) -> F::Output {
|
|
LL| | let mut future = pin!(future);
|
|
LL| | let waker = Waker::noop();
|
|
LL| | let mut context = Context::from_waker(&waker);
|
|
LL| |
|
|
LL| | loop {
|
|
LL| | if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
|
|
LL| | break val;
|
|
LL| | }
|
|
LL| | }
|
|
LL| | }
|
|
LL| |}
|
|
|