Remove let _ pattern

examples/chat-server.rs

@@ -57,7 +57,7 @@ async fn dispatch(receiver: Receiver<Event>) -> io::Result<()> {
         // Send the event to all active clients.
         for stream in map.values_mut() {
             // Ignore errors because the client might disconnect at any point.
-            let _ = stream.write_all(output.as_bytes()).await;
+            stream.write_all(output.as_bytes()).await.ok();
         }
     }
     Ok(())
@@ -70,7 +70,7 @@ async fn read_messages(sender: Sender<Event>, client: Arc<Async<TcpStream>>) ->
 
     while let Some(line) = lines.next().await {
         let line = line?;
-        let _ = sender.send(Event::Message(addr, line)).await;
+        sender.send(Event::Message(addr, line)).await.ok();
     }
     Ok(())
 }
@@ -97,13 +97,13 @@ fn main() -> io::Result<()> {
             // Spawn a background task reading messages from the client.
             smol::spawn(async move {
                 // Client starts with a `Join` event.
-                let _ = sender.send(Event::Join(addr, client.clone())).await;
+                sender.send(Event::Join(addr, client.clone())).await.ok();
 
                 // Read messages from the client and ignore I/O errors when the client quits.
-                let _ = read_messages(sender.clone(), client).await;
+                read_messages(sender.clone(), client).await.ok();
 
                 // Client ends with a `Leave` event.
-                let _ = sender.send(Event::Leave(addr)).await;
+                sender.send(Event::Leave(addr)).await.ok();
             })
             .detach();
         }

examples/ctrl-c.rs

@@ -18,7 +18,7 @@ fn main() {
         println!("Waiting for Ctrl-C...");
 
         // Receive a message that indicates the Ctrl-C signal occurred.
-        let _ = ctrl_c.recv().await;
+        ctrl_c.recv().await.ok();
 
         println!("Done!");
     })

examples/web-crawler.rs

@@ -18,7 +18,7 @@ const ROOT: &str = "https://www.rust-lang.org";
 async fn fetch(url: String, sender: Sender<String>) {
     let body = surf::get(&url).recv_string().await;
     let body = body.unwrap_or_default();
-    let _ = sender.send(body).await;
+    sender.send(body).await.ok();
 }
 
 /// Extracts links from a HTML body.

src/lib.rs

@@ -114,9 +114,8 @@ pub fn spawn<T: Send + 'static>(future: impl Future<Output = T> + Send + 'static
                 .name(format!("smol-{}", n))
                 .spawn(|| {
                     loop {
-                        let _ = catch_unwind(|| {
-                            async_io::block_on(GLOBAL.run(future::pending::<()>()))
-                        });
+                        catch_unwind(|| async_io::block_on(GLOBAL.run(future::pending::<()>())))
+                            .ok();
                     }
                 })
                 .expect("cannot spawn executor thread");