From c626a696706020e5e0cc018db8ea468ea165f529 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Fri, 11 Mar 2022 12:20:23 +1100
Subject: [PATCH] Move the blanket `impl` outside of `extension_trait`.

---
 src/future/future/mod.rs | 3 +++
 src/io/buf_read/mod.rs   | 2 ++
 src/io/read/mod.rs       | 3 ++-
 src/io/seek/mod.rs       | 2 ++
 src/io/write/mod.rs      | 2 ++
 src/stream/stream/mod.rs | 3 +++
 src/utils.rs             | 3 ---
 7 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/future/future/mod.rs b/src/future/future/mod.rs
index 46780f8c..05d099b0 100644
--- a/src/future/future/mod.rs
+++ b/src/future/future/mod.rs
@@ -285,3 +285,6 @@ extension_trait! {
         }
     }
 }
+
+impl<T: Future + ?Sized> FutureExt for T {}
+
diff --git a/src/io/buf_read/mod.rs b/src/io/buf_read/mod.rs
index 2b1ee86b..1314dc9f 100644
--- a/src/io/buf_read/mod.rs
+++ b/src/io/buf_read/mod.rs
@@ -239,6 +239,8 @@ extension_trait! {
     }
 }
 
+impl<T: BufRead + ?Sized> BufReadExt for T {}
+
 pub fn read_until_internal<R: BufReadExt + ?Sized>(
     mut reader: Pin<&mut R>,
     cx: &mut Context<'_>,
diff --git a/src/io/read/mod.rs b/src/io/read/mod.rs
index 601bb7f1..9b5b9644 100644
--- a/src/io/read/mod.rs
+++ b/src/io/read/mod.rs
@@ -372,10 +372,11 @@ extension_trait! {
         fn chain<R: Read>(self, next: R) -> Chain<Self, R> where Self: Sized {
             Chain { first: self, second: next, done_first: false }
         }
-
     }
 }
 
+impl<T: Read + ?Sized> ReadExt for T {}
+
 /// Initializes a buffer if necessary.
 ///
 /// Currently, a buffer is always initialized because `read_initializer`
diff --git a/src/io/seek/mod.rs b/src/io/seek/mod.rs
index 29723223..33ba25e3 100644
--- a/src/io/seek/mod.rs
+++ b/src/io/seek/mod.rs
@@ -48,3 +48,5 @@ extension_trait! {
         }
     }
 }
+
+impl<T: Seek + ?Sized> SeekExt for T {}
diff --git a/src/io/write/mod.rs b/src/io/write/mod.rs
index c8befae3..3463d282 100644
--- a/src/io/write/mod.rs
+++ b/src/io/write/mod.rs
@@ -185,3 +185,5 @@ extension_trait! {
         }
     }
 }
+
+impl<T: Write + ?Sized> WriteExt for T {}
diff --git a/src/stream/stream/mod.rs b/src/stream/stream/mod.rs
index d71dc609..279a8369 100644
--- a/src/stream/stream/mod.rs
+++ b/src/stream/stream/mod.rs
@@ -2307,3 +2307,6 @@ extension_trait! {
         }
     }
 }
+
+impl<T: Stream + ?Sized> StreamExt for T {}
+
diff --git a/src/utils.rs b/src/utils.rs
index 1f3b7fc8..51b2fb0c 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -265,9 +265,6 @@ macro_rules! extension_trait {
         pub trait $ext: $name {
             extension_trait!(@ext [$($body_ext)*] -> []);
         }
-
-        // Blanket implementation of the extension trait for any type implementing the base trait.
-        impl<T: $name + ?Sized> $ext for T {}
     };
 
     // Parse the return type in an extension method.