From 49eeef3fe14b11c78b04525825349f5155edfeab Mon Sep 17 00:00:00 2001
From: Kurnia D Win <kurnia.d.win@gmail.com>
Date: Tue, 1 Dec 2020 10:19:12 +0700
Subject: [PATCH 1/2] Do not expose PollFn struct

We don't need to expose PollFn struct to the public, returning `impl Future` is enought
---
 library/core/src/future/poll_fn.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/core/src/future/poll_fn.rs b/library/core/src/future/poll_fn.rs
index af63e1bb097b8..7564fd3febc86 100644
--- a/library/core/src/future/poll_fn.rs
+++ b/library/core/src/future/poll_fn.rs
@@ -24,7 +24,7 @@ use crate::task::{Context, Poll};
 /// # }
 /// ```
 #[unstable(feature = "future_poll_fn", issue = "72302")]
-pub fn poll_fn<T, F>(f: F) -> PollFn<F>
+pub fn poll_fn<T, F>(f: F) -> impl Future<Output = T>
 where
     F: FnMut(&mut Context<'_>) -> Poll<T>,
 {
@@ -37,7 +37,7 @@ where
 /// documentation for more.
 #[must_use = "futures do nothing unless you `.await` or poll them"]
 #[unstable(feature = "future_poll_fn", issue = "72302")]
-pub struct PollFn<F> {
+struct PollFn<F> {
     f: F,
 }
 

From 52310f7377af297ffefd9004430223302fc6793c Mon Sep 17 00:00:00 2001
From: Kurnia D Win <kurnia.d.win@gmail.com>
Date: Tue, 1 Dec 2020 10:27:43 +0700
Subject: [PATCH 2/2] Update mod.rs

---
 library/core/src/future/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/core/src/future/mod.rs b/library/core/src/future/mod.rs
index cdde094147012..ee547667c349d 100644
--- a/library/core/src/future/mod.rs
+++ b/library/core/src/future/mod.rs
@@ -27,7 +27,7 @@ pub use pending::{pending, Pending};
 pub use ready::{ready, Ready};
 
 #[unstable(feature = "future_poll_fn", issue = "72302")]
-pub use poll_fn::{poll_fn, PollFn};
+pub use poll_fn::poll_fn;
 
 /// This type is needed because:
 ///