Make it compile with async_std

src/extensions/compress.rs

@@ -1,7 +1,6 @@
 //! IMAP COMPRESS extension specified in [RFC4978](https://www.rfc-editor.org/rfc/rfc4978.html).
 
 use std::fmt;
-use std::io::IoSlice;
 use std::pin::Pin;
 use std::task::{Context, Poll};
 
@@ -14,7 +13,9 @@ use crate::types::IdGenerator;
 use crate::Connection;
 
 #[cfg(feature = "runtime-async-std")]
-use async_std::io::{BufReader, Read, Write};
+use async_std::io::{Read, Write};
+#[cfg(feature = "runtime-async-std")]
+use futures::io::BufReader;
 #[cfg(feature = "runtime-tokio")]
 use tokio::io::{AsyncRead as Read, AsyncWrite as Write, BufReader, ReadBuf};
 
@@ -54,15 +55,6 @@ impl<T: Read + Write + Unpin + fmt::Debug> DeflateStream<T> {
         self.inner.get_mut().get_mut().get_mut()
     }
 
-    /// Gets a pinned mutable reference to the underlying stream.
-    pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut T> {
-        self.project()
-            .inner
-            .get_pin_mut()
-            .get_pin_mut()
-            .get_pin_mut()
-    }
-
     /// Consumes `DeflateStream` and returns underlying stream.
     pub fn into_inner(self) -> T {
         self.inner.into_inner().into_inner().into_inner()
@@ -104,7 +96,7 @@ impl<T: Read + Write + Unpin + fmt::Debug> Write for DeflateStream<T> {
     fn poll_write_vectored(
         self: Pin<&mut Self>,
         cx: &mut Context<'_>,
-        bufs: &[IoSlice<'_>],
+        bufs: &[std::io::IoSlice<'_>],
     ) -> Poll<std::io::Result<usize>> {
         self.project().inner.poll_write_vectored(cx, bufs)
     }