1 files changed, 33 insertions, 0 deletions
diff --git a/library/core/src/task/poll.rs b/library/core/src/task/poll.rs
index 57416aeb701..924c424548f 100644
--- a/library/core/src/task/poll.rs
+++ b/library/core/src/task/poll.rs
@@ -3,6 +3,7 @@
 use crate::convert;
 use crate::ops::{self, ControlFlow};
 use crate::result::Result;
+use crate::task::Ready;
 
 /// Indicates whether a value is available or if the current task has been
 /// scheduled to receive a wakeup instead.
@@ -92,6 +93,38 @@ impl<T> Poll<T> {
     pub const fn is_pending(&self) -> bool {
         !self.is_ready()
     }
+
+    /// Extracts the successful type of a [`Poll<T>`].
+    ///
+    /// When combined with the `?` operator, this function will
+    /// propogate any [`Poll::Pending`] values to the caller, and
+    /// extract the `T` from [`Poll::Ready`].
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// #![feature(poll_ready)]
+    ///
+    /// use std::task::{Context, Poll};
+    /// use std::future::{self, Future};
+    /// use std::pin::Pin;
+    ///
+    /// pub fn do_poll(cx: &mut Context<'_>) -> Poll<()> {
+    ///     let mut fut = future::ready(42);
+    ///     let fut = Pin::new(&mut fut);
+    ///
+    ///     let num = fut.poll(cx).ready()?;
+    ///     # drop(num);
+    ///     // ... use num
+    ///
+    ///     Poll::Ready(())
+    /// }
+    /// ```
+    #[inline]
+    #[unstable(feature = "poll_ready", issue = "none")]
+    pub fn ready(self) -> Ready<T> {
+        Ready(self)
+    }
 }
 
 impl<T, E> Poll<Result<T, E>> {