anchor.diff:  KW_WHILE: 'while' ;
   KW_CONST: 'const';
   KW_INSTANCEOF: 'instanceof';
  +KW_NEW: 'new';
   
   ID:
     ('a'..'z'|'A'..'Z'|'_'|'\u007f'..'\u00ff') ('a'..'z'|'A'..'Z'|'0'..'9'|'_'|'\u007f'..'\u00ff')*
  
positive.code:   ;
  
  formal_parameter
    : ID -> ^(PARAMETER ID)
    ;
  
  class_def
  
negative.code: }
  
  tokens {
    Call;
    CallerObject;
    Parameter;
    AbstractMethod;
    Reference;
    Modifiers;
    Block;
    EvalExpr;
    Pre;
    Post;
    Variable;
    ArrayEnd;
    Index;
  }
  
  program
  