anchor.diff:  dynamicExceptionSpecification:
   	Throw LeftParen typeIdList? RightParen;
   
  -typeIdList: theTypeId (Comma theTypeId)* Ellipsis?;
  +typeIdList: theTypeId Ellipsis? (Comma theTypeId Ellipsis?)*;
   
   noeExceptSpecification:
   	Noexcept LeftParen constantExpression RightParen
  
positive.code: 
  unaryExpression:
  	postfixExpression
  	| PlusPlus castExpression
  	| MinusMinus castExpression
  	| unaryOperator castExpression
  	| Sizeof unaryExpression
  	| Sizeof LeftParen theTypeId RightParen
  	| Sizeof Ellipsis LeftParen Identifier RightParen
  	| Alignof LeftParen theTypeId RightParen
  	| noExceptExpression
  	| newExpression
  
negative.code: opaqueEnumDeclaration:
  	enumkey attributeSpecifierSeq? Identifier enumbase? Semi;
  
  enumkey: Enum (Class | Struct)?;
  
  enumbase: Colon typeSpecifierSeq;
  
  