anchor.diff:      ;
   
   parameterDecl
  -    : identifierList? '...'? type
  +    : identifierList? '...'? type_
       ;
   
   /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
positive.code:     ;
  
  varSpec
      : identifierList ( type ( '=' expressionList )? | '=' expressionList )
      ;
  
  
  
negative.code:     ;
  
  //Type      = TypeName | TypeLit | "(" Type ")" .
  type_
      : typeName
      | typeLit
      | '(' type_ ')'
      ;
  
  //TypeName  = identifier | QualifiedIdent .
  