JSON transport: use Tokio resolver for connect()

example-service/src/client.rs

@@ -5,7 +5,7 @@
 // https://opensource.org/licenses/MIT.
 
 use clap::{App, Arg};
-use std::io;
+use std::{io, net::SocketAddr};
 use tarpc::{client, context};
 
 #[tokio::main]
@@ -35,12 +35,12 @@ async fn main() -> io::Result<()> {
 
     let server_addr = flags.value_of("server_addr").unwrap();
     let server_addr = server_addr
-        .parse()
+        .parse::<SocketAddr>()
         .unwrap_or_else(|e| panic!(r#"--server_addr value "{}" invalid: {}"#, server_addr, e));
 
     let name = flags.value_of("name").unwrap().into();
 
-    let transport = tarpc_json_transport::connect(&server_addr).await?;
+    let transport = tarpc_json_transport::connect(server_addr).await?;
 
     // WorldClient is generated by the service attribute. It has a constructor `new` that takes a
     // config and any Transport as input.