anchor.diff:  WITH    :   'with';
   WHILE   :   'while';
   
  -
   // §3.10.1 Integer Literals
   
   IntegerLiteral
  
positive.code: // §3.12 Operators
  
  ARROW           :   '->';
  ELIPSES         :   '..';
  
  ASSIGN          :   '=';
  GT              :   '>';
  
negative.code: fragment
  BinaryDigit
      :   [01]
      ;
  
  // Range Literal
  RangeLiteral
      :   IntegerLiteral '..' IntegerLiteral
      ;
  
  // §3.10.2 Floating-Point Literals
  