anchor.diff:   * This file is released under terms of BSD license
    * See LICENSE file for more information
    */
  -
   
   /**
    * ANTLR 4 Grammar file for the CLAW directive language.
  
positive.code:   :
  
    // loop-fusion directive
      LFUSION group_option[$l] collapse_optional[$l] EOF
      { $l.setDirective(ClawDirective.LOOP_FUSION); }
  
    // loop-interchange directive
  
negative.code:   | /* empty */
  ;
  
  // induction clause
  induction_optional[ClawLanguage l]
    @init{
      List<String> temp = new ArrayList<>();
  