fix(napi-derive-backend): wrong restrict on Result return type

README.md

@@ -89,7 +89,7 @@ extern crate napi;
 /// import the preludes
 use napi::bindgen_prelude::*;
 
-/// module registerion is done by the runtime, no need to explicitly do it now.
+/// module registration is done by the runtime, no need to explicitly do it now.
 #[napi]
 fn fibonacci(n: u32) -> u32 {
   match n {

bench/package.json

@@ -2,6 +2,6 @@
   "name": "test-module",
   "version": "1.0.0",
   "scripts": {
-    "build": "node ../cli/scripts/index.js build --release"
+    "build": "node ../cli/scripts/index.js build --js false --release"
   }
 }

crates/backend/src/codegen/fn.rs

@@ -262,11 +262,12 @@ impl NapiFn {
           }
         } else {
           quote! {
-            if #ret.is_ok() {
-              <Result<#ty> as ToNapiValue>::to_napi_value(env, #ret)
-            } else {
-              JsError::from(#ret.unwrap_err()).throw_into(env);
-              Ok(std::ptr::null_mut())
+            match #ret {
+              Ok(value) => ToNapiValue::to_napi_value(env, value),
+              Err(err) => {
+                JsError::from(err).throw_into(env);
+                Ok(std::ptr::null_mut())
+              },
             }
           }
         }