Finalize structs grammar

Author: matklad

crates/ra_syntax/src/ast/generated/nodes.rs

@@ -422,7 +422,6 @@ pub struct TupleField {
     pub(crate) syntax: SyntaxNode,
 }
 impl ast::AttrsOwner for TupleField {}
-impl ast::NameOwner for TupleField {}
 impl ast::VisibilityOwner for TupleField {}
 impl TupleField {
     pub fn type_ref(&self) -> Option<TypeRef> { support::child(&self.syntax) }

xtask/src/codegen/rust.ungram

@@ -83,22 +83,21 @@ StructDef =
   )
 
 RecordFieldList =
- '{' fields:RecordField* '}'
+ '{' fields:(RecordField (',' RecordField)* ','?)? '}'
 
 RecordField =
   Attr* Visibility? Name ':' ascribed_type:TypeRef
 
 TupleFieldList =
-  '(' fields:TupleField* ')'
+  '(' fields:(TupleField (',' TupleField)* ','?)? ')'
 
 TupleField =
-  Attr* Visibility? Name TypeRef
+  Attr* Visibility? TypeRef
 
 FieldList =
   RecordFieldList
 | TupleFieldList
 
-
 UnionDef =
   Attr* Visibility? 'union' Name GenericParamList? WhereClause?
   RecordFieldList