764 bool Pattern::parsePattern(StringRef PatternStr, StringRef Prefix,  in parsePattern()  argument
769   PatternLoc = SMLoc::getFromPointer(PatternStr.data());  in parsePattern()
773     PatternStr = PatternStr.rtrim(" \t");  in parsePattern()
776   if (PatternStr.empty() && CheckTy != Check::CheckEmpty) {  in parsePattern()
782   if (!PatternStr.empty() && CheckTy == Check::CheckEmpty) {  in parsePattern()
797     FixedStr = PatternStr;  in parsePattern()
803       (PatternStr.size() < 2 ||  in parsePattern()
804        (!PatternStr.contains("{{") && !PatternStr.contains("[[")))) {  in parsePattern()
805     FixedStr = PatternStr;  in parsePattern()
821   while (!PatternStr.empty()) {  in parsePattern()
823     if (PatternStr.starts_with("{{")) {  in parsePattern()
825       size_t End = PatternStr.find("}}");  in parsePattern()
827         SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),  in parsePattern()
837       bool HasAlternation = PatternStr.contains('|');  in parsePattern()
843       if (AddRegExToRegEx(PatternStr.substr(2, End - 2), CurParen, SM))  in parsePattern()
848       PatternStr = PatternStr.substr(End + 2);  in parsePattern()
862     if (PatternStr.starts_with("[[") && !PatternStr.starts_with("[[[")) {  in parsePattern()
863       StringRef UnparsedPatternStr = PatternStr.substr(2);  in parsePattern()
871         SM.PrintMessage(SMLoc::getFromPointer(PatternStr.data()),  in parsePattern()
879       PatternStr = UnparsedPatternStr.substr(End + 2);  in parsePattern()
1043         std::min(PatternStr.find("{{", 1), PatternStr.find("[[", 1));  in parsePattern()
1044     RegExStr += Regex::escape(PatternStr.substr(0, FixedMatchEnd));  in parsePattern()
1045     PatternStr = PatternStr.substr(FixedMatchEnd);  in parsePattern()