422 static void warn(Twine Message, std::string Whence = "",  in warn()  argument
425   if (!Whence.empty())  in warn()
426     errs() << Whence << ": ";  in warn()
432 static void warn(Error E, StringRef Whence = "") {  in warn()  argument
435       warn(IPE.message(), std::string(Whence), std::string(""));  in warn()
440 static void exitWithError(Twine Message, std::string Whence = "",  in exitWithError()  argument
443   if (!Whence.empty())  in exitWithError()
444     errs() << Whence << ": ";  in exitWithError()
451 static void exitWithError(Error E, StringRef Whence = "") {  in exitWithError()  argument
460       exitWithError(IPE.message(), std::string(Whence), std::string(Hint));  in exitWithError()
465   exitWithError(toString(std::move(E)), std::string(Whence));  in exitWithError()
468 static void exitWithErrorCode(std::error_code EC, StringRef Whence = "") {  in exitWithErrorCode()  argument
469   exitWithError(EC.message(), std::string(Whence));  in exitWithErrorCode()
473                                  StringRef Whence = "") {  in warnOrExitGivenError()  argument
475     exitWithErrorCode(EC, Whence);  in warnOrExitGivenError()
477     warn(EC.message(), std::string(Whence));  in warnOrExitGivenError()