Use Option instead of once/empty.

2022-06-11 16:01:15 +08:00
parent 8999872d62
commit b9cbeb65d6
7 changed files with 34 additions and 30 deletions
--- a/src/api/register.rs
+++ b/src/api/register.rs
@@ -123,9 +123,7 @@ impl Engine {
        let param_type_names: crate::StaticVec<_> = F::param_names()
            .iter()
            .map(|ty| format!("_: {}", self.format_type_name(ty)))
-            .chain(std::iter::once(
-                self.format_type_name(F::return_type_name()).into(),
-            ))
+            .chain(Some(self.format_type_name(F::return_type_name()).into()))
            .collect();

        #[cfg(feature = "metadata")]