136 std::string Regex::sub(StringRef Repl, StringRef String,  in sub()  argument
149   while (!Repl.empty()) {  in sub()
151     std::pair<StringRef, StringRef> Split = Repl.split('\\');  in sub()
158       if (Repl.size() != Split.first.size() &&  in sub()
165     Repl = Split.second;  in sub()
168     switch (Repl[0]) {  in sub()
171       Res += Repl[0];  in sub()
172       Repl = Repl.substr(1);  in sub()
178       Repl = Repl.substr(1);  in sub()
182       Repl = Repl.substr(1);  in sub()
189       StringRef Ref = Repl.slice(0, Repl.find_first_not_of("0123456789"));  in sub()
190       Repl = Repl.substr(Ref.size());  in sub()