anchor.diff:      ;
   
   globalConstantDeclaration
  -    : attributes Const identifierInitializer (',' identifierInitializer)* SemiColon
  +    : attributes? Const identifierInitializer (',' identifierInitializer)* SemiColon
       ;
   
   expressionList
  
positive.code:     ;
  
  formalParameter
      : attributes memberModifier? QuestionMark? typeHint? '&'? '...'? variableInitializer
      ;
  
  typeHint
  
negative.code:     ;
  
  attributes
      : AttributeStart (identifier ':')? attribute (',' attribute)* ']'
      ;
  
  