anchor.diff:  PRIVATE      : 'private';
   RANGE        : 'range';
   RESHAPE      : 'reshape';
  +TARGET       : 'target';
   UPDATE       : 'update';
   
   // data copy/update clause keywords
  
positive.code: import cx2x.translator.common.ClawConstant;
  import cx2x.translator.language.base.*;
  import cx2x.translator.language.common.*;
  import cx2x.translator.common.Utility;
  }
  
  
negative.code: // Directive primitive clause
  ACC          : 'acc';
  OMP          : 'omp';
  
  // Target for the target clause
  CPU          : 'cpu';
  GPU          : 'gpu';
  MIC          : 'mic';
  
  // Special elements
  IDENTIFIER      : [a-zA-Z_$] [a-zA-Z_$0-9-]* ;
  