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use crate::future::Future;
use crate::pin::Pin;
use crate::task::{Context, Poll};
#[stable(feature = "future_readiness_fns", since = "1.48.0")]
#[derive(Debug, Clone)]
#[must_use = "futures do nothing unless you `.await` or poll them"]
pub struct Ready<T>(Option<T>);
#[stable(feature = "future_readiness_fns", since = "1.48.0")]
impl<T> Unpin for Ready<T> {}
#[stable(feature = "future_readiness_fns", since = "1.48.0")]
impl<T> Future for Ready<T> {
type Output = T;
#[inline]
fn poll(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<T> {
Poll::Ready(self.0.take().expect("`Ready` polled after completion"))
}
}
impl<T> Ready<T> {
#[unstable(feature = "ready_into_inner", issue = "101196")]
#[must_use]
#[inline]
pub fn into_inner(self) -> T {
self.0.expect("Called `into_inner()` on `Ready` after completion")
}
}
#[stable(feature = "future_readiness_fns", since = "1.48.0")]
pub fn ready<T>(t: T) -> Ready<T> {
Ready(Some(t))
}