413   if (NULL == symbol->neg)

   413   

   414     s4o.print("1");  /* positive time value */

   414   if (NULL == symbol->neg)    s4o.print("1");  /* positive time value */

   415   else

   415   else                        symbol->neg->accept(*this);  /* this will print '-1'   :-) */

   416     symbol->neg->accept(*this);  /* this will print '-1'   :-) */

   416 

   417 

   417   s4o.print(", ");

   418   s4o.print(", ");

   419 

   433 

   427 /* SYM_REF5(interval_c, days, hours, minutes, seconds, milliseconds) */

   434 /* SYM_REF2(days_c, days, hours) */

   428 void *visit(interval_c *symbol) {

   435 void *visit(days_c *symbol) {

   429   TRACE("interval_c");

   436   TRACE("days_c");

   430   /* s4o.print("0, 0, 0, 0, 0");  // milliseconds, seconds, minutes, hours, days */

   437   if (NULL == symbol->hours)

   431   if (NULL == symbol->milliseconds) s4o.print("0");  /* milliseconds */

   438     s4o.print("0, 0, 0, 0");  /* milliseconds, seconds, minutes, hours */

   432   else                              symbol->milliseconds->accept(*this);

   439   else

   433   s4o.print(", ");

   440     symbol->hours->accept(*this);

   434 

   441 

   435   if (NULL == symbol->seconds)      s4o.print("0");  /* seconds */

   442   s4o.print(", ");

   436   else                              symbol->seconds->accept(*this);

   443 

   437   s4o.print(", ");

   444   symbol->days->accept(*this);

   438 

   445   return NULL;

   439   if (NULL == symbol->minutes)      s4o.print("0");  /* minutes */

   446 }

   440   else                              symbol->minutes->accept(*this);

   447 

   441   s4o.print(", ");

   448 

   442 

   449 /* SYM_REF2(hours_c, hours, minutes) */

   443   if (NULL == symbol->hours)        s4o.print("0");  /* hours */

   450 void *visit(hours_c *symbol) {

   444   else                              symbol->hours->accept(*this);

   451   TRACE("hours_c");

   445   s4o.print(", ");

   452   if (NULL == symbol->minutes)

   446 

   453     s4o.print("0, 0, 0");  /* milliseconds, seconds, minutes */

   447   if (NULL == symbol->days)         s4o.print("0");  /* days */

   454   else

   448   else                              symbol->days->accept(*this);

   455     symbol->minutes->accept(*this);

   449 

   456 

   450   return NULL;

   457   s4o.print(", ");

   451 }

   458 

   452 

   459   symbol->hours->accept(*this);

   460   return NULL;

   461 }

   462 

   463 

   464 /* SYM_REF2(minutes_c, minutes, seconds) */

   465 void *visit(minutes_c *symbol) {

   466   TRACE("minutes_c");

   467   if (NULL == symbol->seconds)

   468     s4o.print("0, 0");  /* milliseconds, seconds */

   469   else

   470     symbol->seconds->accept(*this);

   471 

   472   s4o.print(", ");

   473 

   474   symbol->minutes->accept(*this);

   475   return NULL;

   476 }

   477 

   478 

   479 /* SYM_REF2(seconds_c, seconds, milliseconds) */

   480 void *visit(seconds_c *symbol) {

   481   TRACE("seconds_c");

   482   if (NULL == symbol->milliseconds)

   483     s4o.print("0");  /* milliseconds */

   484   else

   485     symbol->milliseconds->accept(*this);

   486 

   487   s4o.print(", ");

   488 

   489   symbol->seconds->accept(*this);

   490   return NULL;

   491 }

   492 

   493 

   494 /* SYM_REF2(milliseconds_c, milliseconds, unused) */

   495 void *visit(milliseconds_c *symbol) {

   496   TRACE("milliseconds_c");

   497   symbol->milliseconds->accept(*this);

   498   return NULL;

   499 }