io: simplify check for empty slice (#6293)

wutchzone · web-flow · commit f80bbec28ff7 · 2024-01-18T10:59:22.000Z
diff --git a/tokio/src/io/util/chain.rs b/tokio/src/io/util/chain.rs
@@ -114,7 +114,7 @@ where
 
         if !*me.done_first {
             match ready!(me.first.poll_fill_buf(cx)?) {
-                buf if buf.is_empty() => {
+                [] => {
                     *me.done_first = true;
                 }
                 buf => return Poll::Ready(Ok(buf)),

Original file line number	Diff line number	Diff line change
`@@ -114,7 +114,7 @@ where`
`114`	`114`
`115`	`115`	`if !*me.done_first {`
`116`	`116`	`match ready!(me.first.poll_fill_buf(cx)?) {`
`117`		`- buf if buf.is_empty() => {`
	`117`	`+ [] => {`
`118`	`118`	`*me.done_first = true;`
`119`	`119`	`}`
`120`	`120`	`buf => return Poll::Ready(Ok(buf)),`