137 std::string Regex::sub(StringRef Repl, StringRef String,  in sub()  argument
150   while (!Repl.empty()) {  in sub()
152     std::pair<StringRef, StringRef> Split = Repl.split('\\');  in sub()
159       if (Repl.size() != Split.first.size() &&  in sub()
166     Repl = Split.second;  in sub()
169     switch (Repl[0]) {  in sub()
173       if (Repl.size() >= 4 && Repl[1] == '<') {  in sub()
174         size_t End = Repl.find('>');  in sub()
175         StringRef Ref = Repl.slice(2, End);  in sub()
178           Repl = Repl.substr(End + 1);  in sub()
191       Res += Repl[0];  in sub()
192       Repl = Repl.substr(1);  in sub()
198       Repl = Repl.substr(1);  in sub()
202       Repl = Repl.substr(1);  in sub()
209       StringRef Ref = Repl.slice(0, Repl.find_first_not_of("0123456789"));  in sub()
210       Repl = Repl.substr(Ref.size());  in sub()