42 lines
1005 B
Rust
42 lines
1005 B
Rust
#![feature(
|
|
async_await,
|
|
await_macro,
|
|
futures_api,
|
|
)]
|
|
|
|
use std::{future::Future, pin::Pin, task::Poll, ptr};
|
|
use std::task::{Waker, RawWaker, RawWakerVTable, Context};
|
|
|
|
// See if we can run a basic `async fn`
|
|
pub async fn foo(x: &u32, y: u32) -> u32 {
|
|
let y = &y;
|
|
let z = 9;
|
|
let z = &z;
|
|
let y = await!(async { *y + *z });
|
|
let a = 10;
|
|
let a = &a;
|
|
*x + y + *a
|
|
}
|
|
|
|
fn raw_waker_clone(_this: *const ()) -> RawWaker {
|
|
panic!("unimplemented");
|
|
}
|
|
fn raw_waker_wake(_this: *const ()) {
|
|
panic!("unimplemented");
|
|
}
|
|
fn raw_waker_drop(_this: *const ()) {}
|
|
|
|
static RAW_WAKER: RawWakerVTable = RawWakerVTable::new(
|
|
raw_waker_clone,
|
|
raw_waker_wake,
|
|
raw_waker_drop,
|
|
);
|
|
|
|
fn main() {
|
|
let x = 5;
|
|
let mut fut = foo(&x, 7);
|
|
let waker = unsafe { Waker::new_unchecked(RawWaker::new(ptr::null(), &RAW_WAKER)) };
|
|
let mut context = Context::from_waker(&waker);
|
|
assert_eq!(unsafe { Pin::new_unchecked(&mut fut) }.poll(&mut context), Poll::Ready(31));
|
|
}
|