Address clippy lints

plugins/src/lib.rs

@@ -156,7 +156,7 @@ impl Parse for DeriveSerde {
                     result,
                     syn::Error::new(
                         meta.span(),
-                        format!("tarpc::service does not support this meta item")
+                        "tarpc::service does not support this meta item"
                     )
                 );
                 continue;
@@ -167,7 +167,7 @@ impl Parse for DeriveSerde {
                     result,
                     syn::Error::new(
                         meta.span(),
-                        format!("tarpc::service does not support this meta item")
+                        "tarpc::service does not support this meta item"
                     )
                 );
                 continue;

tarpc/Cargo.toml

@@ -48,6 +48,7 @@ log = "0.4"
 pin-utils = "0.1.0-alpha"
 tokio = { version = "0.2", features = ["full"] }
 tokio-serde = { version = "0.6", features = ["json"] }
+trybuild = "1.0"
 
 [[example]]
 name = "server_calling_server"

tarpc/src/rpc/util/serde.rs

@@ -15,9 +15,10 @@ pub fn serialize_epoch_secs<S>(system_time: &SystemTime, serializer: S) -> Resul
 where
     S: Serializer,
 {
+    const ZERO_SECS: Duration = Duration::from_secs(0);
     system_time
         .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap_or(Duration::from_secs(0))
+        .unwrap_or(ZERO_SECS)
         .as_secs() // Only care about second precision
         .serialize(serializer)
 }