fix(stackable-versioned): Correctly emit empty named field variants

Author: Techassi

crates/stackable-versioned-macros/src/codegen/item/variant.rs

@@ -193,7 +193,7 @@ impl VersionedVariant {
         match &self.fields {
             Fields::Named(fields_named) => {
                 let fields = Self::named_field_idents(fields_named);
-                Some(quote! { { #(#fields)*: #(#fields.into()),* } })
+                Some(quote! { { #(#fields:)* #(#fields.into()),* } })
             }
             Fields::Unnamed(fields_unnamed) => {
                 let fields = Self::unnamed_field_ident(fields_unnamed);

crates/stackable-versioned-macros/tests/inputs/pass/enum_fields.rs

@@ -3,13 +3,14 @@ use stackable_versioned::versioned;
 #[versioned(version(name = "v1alpha1"), version(name = "v1alpha2"))]
 // ---
 pub mod versioned {
-    enum MyEnum {
+    enum Foo {
         A { aa: usize },
         B { bb: bool },
     }
 
-    enum Bla {
+    enum Bar {
         A(A),
+        B {},
     }
 
     struct A {}