From 91e61cf6bf6808b8f9380122a0d38b4d79b1fdd1 Mon Sep 17 00:00:00 2001
From: Wonwoo Choi <chwo9843@gmail.com>
Date: Sun, 15 Sep 2019 21:18:02 +0900
Subject: [PATCH] Remove unnecessary Unpin bounds

---
 src/stream/stream/scan.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/stream/stream/scan.rs b/src/stream/stream/scan.rs
index 0776a7b..4846144 100644
--- a/src/stream/stream/scan.rs
+++ b/src/stream/stream/scan.rs
@@ -9,7 +9,7 @@ pub struct Scan<S, St, F> {
     state_f: (St, F),
 }
 
-impl<S, St: Unpin, F: Unpin> Scan<S, St, F> {
+impl<S, St, F> Scan<S, St, F> {
     pub(crate) fn new(stream: S, initial_state: St, f: F) -> Self {
         Self {
             stream,
@@ -21,11 +21,12 @@ impl<S, St: Unpin, F: Unpin> Scan<S, St, F> {
     pin_utils::unsafe_unpinned!(state_f: (St, F));
 }
 
+impl<S: Unpin, St, F> Unpin for Scan<S, St, F> {}
+
 impl<S, St, F, B> futures_core::stream::Stream for Scan<S, St, F>
 where
     S: futures_core::stream::Stream,
-    St: Unpin,
-    F: Unpin + FnMut(&mut St, S::Item) -> Option<B>,
+    F: FnMut(&mut St, S::Item) -> Option<B>,
 {
     type Item = B;