32 static bool CanBeEmptyString(Regexp *re);
40   bool PostVisit(Regexp* re, bool parent_arg, bool pre_arg, bool* child_args,
43   bool ShortVisit(Regexp* re, bool a) {  in ShortVisit()  argument
53 bool PCREWalker::PostVisit(Regexp* re, bool parent_arg, bool pre_arg,  in PostVisit()  argument
61   switch (re->op()) {  in PostVisit()
66       if (CanBeEmptyString(re->sub()[0]))  in PostVisit()
70       if (re->max() == -1 && CanBeEmptyString(re->sub()[0]))  in PostVisit()
76       if (re->rune() == '\v')  in PostVisit()
83       if (re->parse_flags() & Regexp::WasDollar)  in PostVisit()
117   bool PostVisit(Regexp* re, bool parent_arg, bool pre_arg,
120   bool ShortVisit(Regexp* re, bool a) {  in ShortVisit()  argument
134 bool EmptyStringWalker::PostVisit(Regexp* re, bool parent_arg, bool pre_arg,  in PostVisit()  argument
136   switch (re->op()) {  in PostVisit()
174       return child_args[0] || re->min() == 0;  in PostVisit()
180 static bool CanBeEmptyString(Regexp* re) {  in CanBeEmptyString()  argument
182   return w.Walk(re, true);  in CanBeEmptyString()