refactor: use pin! macro from std (#18110)

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This commit replaces `pin_mut!` macro with `pin!` macro that has been
provided from std since Rust 1.68.0.
With the std version we can not only expect its stability but also pass
an expression (rather than identifier) as an argument to the macro.

ext/http/lib.rs

@@ -14,7 +14,6 @@ use deno_core::futures::future::Pending;
 use deno_core::futures::future::RemoteHandle;
 use deno_core::futures::future::Shared;
 use deno_core::futures::never::Never;
-use deno_core::futures::pin_mut;
 use deno_core::futures::ready;
 use deno_core::futures::stream::Peekable;
 use deno_core::futures::FutureExt;
@@ -62,6 +61,7 @@ use std::io;
 use std::io::Write;
 use std::mem::replace;
 use std::mem::take;
+use std::pin::pin;
 use std::pin::Pin;
 use std::rc::Rc;
 use std::sync::Arc;
@@ -156,8 +156,8 @@ impl HttpConnResource {
 
     // A local task that polls the hyper connection future to completion.
     let task_fut = async move {
-      pin_mut!(shutdown_fut);
-      pin_mut!(conn_fut);
+      let conn_fut = pin!(conn_fut);
+      let shutdown_fut = pin!(shutdown_fut);
       let result = match select(conn_fut, shutdown_fut).await {
         Either::Left((result, _)) => result,
         Either::Right((_, mut conn_fut)) => {

runtime/inspector_server.rs

@@ -8,7 +8,6 @@ use deno_core::futures::channel::mpsc::UnboundedSender;
 use deno_core::futures::channel::oneshot;
 use deno_core::futures::future;
 use deno_core::futures::future::Future;
-use deno_core::futures::pin_mut;
 use deno_core::futures::prelude::*;
 use deno_core::futures::select;
 use deno_core::futures::stream::StreamExt;
@@ -25,6 +24,7 @@ use std::cell::RefCell;
 use std::collections::HashMap;
 use std::convert::Infallible;
 use std::net::SocketAddr;
+use std::pin::pin;
 use std::process;
 use std::rc::Rc;
 use std::thread;
@@ -226,7 +226,7 @@ async fn server(
     Rc::new(RefCell::new(HashMap::<Uuid, InspectorInfo>::new()));
 
   let inspector_map = Rc::clone(&inspector_map_);
-  let register_inspector_handler = register_inspector_rx
+  let mut register_inspector_handler = pin!(register_inspector_rx
     .map(|info| {
       eprintln!(
         "Debugger listening on {}",
@@ -240,16 +240,16 @@ async fn server(
         panic!("Inspector UUID already in map");
       }
     })
-    .collect::<()>();
+    .collect::<()>());
 
   let inspector_map = Rc::clone(&inspector_map_);
-  let deregister_inspector_handler = future::poll_fn(|cx| {
+  let mut deregister_inspector_handler = pin!(future::poll_fn(|cx| {
     inspector_map
       .borrow_mut()
       .retain(|_, info| info.deregister_rx.poll_unpin(cx) == Poll::Pending);
     Poll::<Never>::Pending
   })
-  .fuse();
+  .fuse());
 
   let json_version_response = json!({
     "Browser": name,
@@ -287,7 +287,7 @@ async fn server(
   });
 
   // Create the server manually so it can use the Local Executor
-  let server_handler = hyper::server::Builder::new(
+  let mut server_handler = pin!(hyper::server::Builder::new(
     hyper::server::conn::AddrIncoming::bind(&host).unwrap_or_else(|e| {
       eprintln!("Cannot start inspector server: {e}.");
       process::exit(1);
@@ -302,11 +302,7 @@ async fn server(
     eprintln!("Cannot start inspector server: {err}.");
     process::exit(1);
   })
-  .fuse();
-
-  pin_mut!(register_inspector_handler);
-  pin_mut!(deregister_inspector_handler);
-  pin_mut!(server_handler);
+  .fuse());
 
   select! {
     _ = register_inspector_handler => {},