anchor.diff:  DOUBLE:             'double';
   DEFINED:            'defined';
   DEFINE:             'define';
  -DEFAULT:            'default'; 
  +DEFAULT:            'default';
   ELSE:               'else';
   ENUM:               'enum';
   EVENT:              'event';
  
positive.code: ;
  
  OTHER
  : . 
  ;
  
  HEX
  
negative.code: 
  lexer grammar TinyosLexer;
  
  channels{
      WHITESPACE
  }
  
  ABSTRACT:           'abstract';
  