feat(napi): allow empty enums

crates/macro/src/parser/mod.rs

@@ -884,9 +884,6 @@ impl ConvertToAST for syn::ItemEnum {
       Visibility::Public(_) => {}
       _ => bail_span!(self, "only public enum allowed"),
     }
-    if self.variants.is_empty() {
-      bail_span!(self, "cannot export empty enum to JS");
-    }
 
     self.attrs.push(Attribute {
       pound_token: Default::default(),

examples/napi/__test__/typegen.spec.ts.md

@@ -65,6 +65,9 @@ Generated by [AVA](https://avajs.dev).
       /** Tasty */␊
       Duck = 2␊
     }␊
+    export const enum Empty {␊
+      ␊
+    }␊
     /** You could break the step and for an new continuous value. */␊
     export const enum CustomNumEnum {␊
       One = 1,␊

examples/napi/index.d.ts

@@ -54,6 +54,9 @@ export const enum Kind {
   Cat = 1,
   /** Tasty */
   Duck = 2
+}
+export const enum Empty {
+  
 }
 /** You could break the step and for an new continuous value. */
 export const enum CustomNumEnum {

examples/napi/src/enum.rs

@@ -11,6 +11,9 @@ pub enum Kind {
   Duck,
 }
 
+#[napi]
+pub enum Empty {}
+
 /// You could break the step and for an new continuous value.
 #[napi]
 pub enum CustomNumEnum {