31 lines
585 B
Rust
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2021-06-24 16:32:36 +08:00
use std::future::Future;
use std::pin::Pin;
use std::task::{Context, Poll};
pub struct Ready<T> {
val: Option<T>,
}
impl<T> Ready<T> {
#[inline]
pub fn into_inner(mut self) -> T {
self.val.take().unwrap()
}
}
impl<T> Unpin for Ready<T> {}
impl<T> Future for Ready<T> {
type Output = T;
#[inline]
fn poll(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<T> {
let val = self.val.take().expect("Ready polled after completion");
Poll::Ready(val)
}
}
pub fn ready<T>(val: T) -> Ready<T> {
Ready { val: Some(val) }
}