Introduce EventParametersDeclaration in v0/v1

crates/solidity/inputs/language/definition/02-definitions/10-events/productions.yml

@@ -8,19 +8,24 @@
         sequence:
           - reference: "EventKeyword"
           - reference: "Identifier"
-          - delimitedBy:
-              open:
-                reference: "OpenParen"
-              parser:
-                optional:
-                  reference: "EventParametersList"
-              close:
-                reference: "CloseParen"
+          - reference: "EventParametersDeclaration"
           - optional:
               reference: "AnonymousKeyword"
       terminator:
         reference: "Semicolon"
 
+- name: "EventParametersDeclaration"
+  kind: "Parser"
+  unversioned:
+    delimitedBy:
+      open:
+        reference: "OpenParen"
+      parser:
+        optional:
+          reference: "EventParametersList"
+      close:
+        reference: "CloseParen"
+
 - name: "EventParametersList"
   kind: "Parser"
   unversioned:

crates/solidity/inputs/language/src/dsl.rs

@@ -277,7 +277,9 @@ slang_grammar! {
 
         parser ErrorParametersList = { introduced in "0.8.4" (ErrorParameter separated by Comma) } ;
 
-        parser EventDefinition = ((EventKeyword Identifier ((EventParametersList ?) delimited by OpenParen and CloseParen) (AnonymousKeyword ?)) terminated by Semicolon) ;
+        parser EventDefinition = ((EventKeyword Identifier EventParametersDeclaration (AnonymousKeyword ?)) terminated by Semicolon) ;
+
+        parser EventParametersDeclaration = ((EventParametersList ?) delimited by OpenParen and CloseParen);
 
         parser EventParameter = (TypeName (IndexedKeyword ?) (Identifier ?)) ;