Enum entry syntax fixed

grammar/src/class.grm

@@ -14,11 +14,15 @@ class
   : modifiers "class" SimpleName
       typeParameters?
       "wraps"?
-      ("(" primaryConstructorParameter{","} ")")?
+      primaryConstructorParameters?
       (":" attributes delegationSpecifier{","})?
       (classBody? | enumClassBody)
   ;
 
+primaryConstructorParameters
+  : "(" primaryConstructorParameter{","} ")"
+  ;
+
 typeParameters
   : "<" typeParameter{","} ">"
     ("where" typeConstraint{","})?  // TODO: Syntax is questionable

grammar/src/enum.grm

@@ -3,5 +3,5 @@ enumClassBody
   ;
 
 enumEntry
-  : modifiers SimpleName typeParameters? valueParameters? (":" initializer{","})? classBody?
+  : modifiers SimpleName typeParameters? primaryConstructorParameters? (":" initializer{","})? classBody?
   ;