private boolean REGEX_sempred(RuleContext _localctx, int predIndex) {
   switch (predIndex) {
     case 1:
       return SlashStrategy.slashIsRegex(this);
   }
   return true;
 }
 private boolean DIV_sempred(RuleContext _localctx, int predIndex) {
   switch (predIndex) {
     case 0:
       return false == SlashStrategy.slashIsRegex(this);
   }
   return true;
 }