anchor.diff:      ) ('\r\n'|'\r'|'\n'|EOF)
       -> channel(HIDDEN)
       ;
  -    
  -WS  
  +
  +WS
       : [ \t\u000C\r\n]+ -> skip
       ;
   
  
positive.code:     ;
  
  functioncall
      : prefixexp args | prefixexp ':' NAME args 
      ;
  */
  
  
negative.code:     : ',' | ';'
      ;
  
  operatorOr
  	: 'or';
  
  operatorAnd
  	: 'and';
  
  operatorComparison
  	: '<' | '>' | '<=' | '>=' | '~=' | '==';
  
  operatorStrcat
  