anchor.diff:  PRIVATE      : 'private';
   RANGE        : 'range';
   RESHAPE      : 'reshape';
  +UPDATE       : 'update';
  +
  +// data copy/update clause keywords
  +IN           : 'in';
  +OUT          : 'out';
   
   // Directive primitive clause
   ACC          : 'acc';
  
positive.code:     }
  ;
  
  
  /*----------------------------------------------------------------------------
   * LEXER RULES
  
negative.code: 
  // CLAW Clauses
  COLLAPSE     : 'collapse';
  COPY         : 'copy';
  DATA         : 'data';
  DIMENSION    : 'dimension';
  FORWARD      : 'forward';
  