Correctly shutdown the server on `shutdown request

vhdl_ls/src/stdio_server.rs

@@ -86,7 +86,19 @@ impl ConnectionRpcChannel {
         while let Ok(message) = self.connection.receiver.recv() {
             trace!("Received message: {:?}", message);
             match message {
-                lsp_server::Message::Request(request) => self.handle_request(&mut server, request),
+                lsp_server::Message::Request(request) => {
+                    match self.connection.handle_shutdown(&request) {
+                        Ok(shutdown) => {
+                            if shutdown {
+                                server.shutdown_server();
+                                break;
+                            }
+                        },
+                        Err(err) => panic!("{err:?}")
+                    }
+
+                    self.handle_request(&mut server, request)
+                },
                 lsp_server::Message::Notification(notification) => {
                     self.handle_notification(&mut server, notification);
                 }
@@ -195,14 +207,6 @@ impl ConnectionRpcChannel {
             }
             Err(request) => request,
         };
-        let request = match extract::<request::Shutdown>(request) {
-            Ok((id, _params)) => {
-                server.shutdown_server();
-                self.send_response(lsp_server::Response::new_ok(id, ()));
-                return;
-            }
-            Err(request) => request,
-        };
 
         debug!("Unhandled request: {:?}", request);
         self.send_response(lsp_server::Response::new_err(