Skeleton for DoubleEndedStreamExt trait

src/stream/double_ended/mod.rs

@@ -0,0 +1,22 @@
+extension_trait! {
+    use crate::stream::Stream;
+
+    use std::pin::Pin;
+    use std::task::{Context, Poll};
+
+    #[doc = r#"
+    Something fancy
+    "#]
+    pub trait DoubleEndedStream {
+        type Item;
+
+        fn poll_next_back(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>>;
+    }
+
+    #[doc = r#"
+        Something else
+    "#]
+    pub trait DoubleEndedStreamExt: crate::stream::DoubleEndedStream {
+    }
+}
+

src/stream/mod.rs

@@ -318,6 +318,7 @@ mod repeat;
 mod repeat_with;
 
 cfg_unstable! {
+    mod double_ended;
     mod double_ended_stream;
     mod exact_size_stream;
     mod extend;