nullable         2601 maint/gnulib/lib/dfa.c     bool nullable;
nullable         2635 maint/gnulib/lib/dfa.c           stk->nullable = true;
nullable         2667 maint/gnulib/lib/dfa.c             stk[-1].nullable = true;
nullable         2696 maint/gnulib/lib/dfa.c           if (stk[-2].nullable)
nullable         2703 maint/gnulib/lib/dfa.c           if (stk[-1].nullable)
nullable         2715 maint/gnulib/lib/dfa.c           stk[-2].nullable &= stk[-1].nullable;
nullable         2727 maint/gnulib/lib/dfa.c           stk[-2].nullable |= stk[-1].nullable;
nullable         2737 maint/gnulib/lib/dfa.c           stk->nullable = d->tokens[i] == BACKREF;
nullable         2755 maint/gnulib/lib/dfa.c                stk[-1].nullable ? " nullable: yes\n" : " nullable: no\n");