35 lines
783 B
Rust
35 lines
783 B
Rust
//@ edition: 2021
|
|
//@ compile-flags: -Zinline-mir
|
|
//@ build-pass
|
|
|
|
// Ensure that we don't hit a Steal ICE because we forgot to ensure
|
|
// `mir_inliner_callees` for the synthetic by-move coroutine body since
|
|
// its def-id wasn't previously being considered.
|
|
|
|
#![feature(async_closure, noop_waker)]
|
|
|
|
use std::future::Future;
|
|
use std::pin::pin;
|
|
use std::task::*;
|
|
|
|
pub fn block_on<T>(fut: impl Future<Output = T>) -> T {
|
|
let mut fut = pin!(fut);
|
|
let ctx = &mut Context::from_waker(Waker::noop());
|
|
|
|
loop {
|
|
match fut.as_mut().poll(ctx) {
|
|
Poll::Pending => {}
|
|
Poll::Ready(t) => break t,
|
|
}
|
|
}
|
|
}
|
|
|
|
async fn call_once<T>(f: impl async FnOnce() -> T) -> T {
|
|
f().await
|
|
}
|
|
|
|
fn main() {
|
|
let c = async || {};
|
|
block_on(call_once(c));
|
|
}
|