From 0558c395202c48a2c9d92d34f5302d09e5e51344 Mon Sep 17 00:00:00 2001
From: Michal 'vorner' Vaner <vorner@vorner.cz>
Date: Sun, 15 Sep 2019 20:19:36 +0200
Subject: [PATCH] Support std::io::{Empty, Sink}
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Add async support for the „stub“ helpers of std::io.
---
 futures-io/src/lib.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/futures-io/src/lib.rs b/futures-io/src/lib.rs
index 551ee0700a..87d8ebe92c 100644
--- a/futures-io/src/lib.rs
+++ b/futures-io/src/lib.rs
@@ -42,6 +42,8 @@ mod if_std {
         IoSlice as IoSlice,
         IoSliceMut as IoSliceMut,
         SeekFrom as SeekFrom,
+        Sink as Sink,
+        Empty as Empty,
     };
 
     #[cfg(feature = "read_initializer")]
@@ -390,6 +392,10 @@ mod if_std {
         delegate_async_read_to_stdio!();
     }
 
+    impl AsyncRead for Empty {
+        delegate_async_read_to_stdio!();
+    }
+
     macro_rules! deref_async_write {
         () => {
             fn poll_write(mut self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8])
@@ -509,6 +515,10 @@ mod if_std {
         delegate_async_write_to_stdio!();
     }
 
+    impl AsyncWrite for Sink {
+        delegate_async_write_to_stdio!();
+    }
+
     macro_rules! deref_async_seek {
         () => {
             fn poll_seek(mut self: Pin<&mut Self>, cx: &mut Context<'_>, pos: SeekFrom)