ErrorResult result("Error: Failed to open file");
ErrorResult result(404);
if (result.isError()) { // handle the error }
std::cout << "Error message: " << result.getErrorMsg() << std::endl;
std::cout << "Error code: " << result.getErrorCode() << std::endl;The package library for ErrorResult is not specified in the question, as ErrorResult may be included in any C++ library that provides error handling functionality. However, some examples of C++ libraries that use ErrorResult or similar classes for error handling include Boost, Google Test, and gRPC.