From de8bd2fb52a9a75312ec6de675f3961ff65ec4c1 Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Sat, 27 Mar 2021 01:04:23 +0900
Subject: [PATCH] Add AsyncSeekExt::stream_position

---
 futures-util/src/io/mod.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/futures-util/src/io/mod.rs b/futures-util/src/io/mod.rs
index 1437930f66..437aedf0c4 100644
--- a/futures-util/src/io/mod.rs
+++ b/futures-util/src/io/mod.rs
@@ -601,6 +601,17 @@ pub trait AsyncSeekExt: AsyncSeek {
     {
         assert_future::<Result<u64>, _>(Seek::new(self, pos))
     }
+
+    /// Creates a future which will return the current seek position from the
+    /// start of the stream.
+    ///
+    /// This is equivalent to `self.seek(SeekFrom::Current(0))`.
+    fn stream_position(&mut self) -> Seek<'_, Self>
+    where
+        Self: Unpin,
+    {
+        self.seek(SeekFrom::Current(0))
+    }
 }
 
 impl<S: AsyncSeek + ?Sized> AsyncSeekExt for S {}