int main() { { std::string what_arg("io test message"); std::ios_base::failure se(what_arg, make_error_code(std::errc::is_a_directory)); assert(se.code() == std::make_error_code(std::errc::is_a_directory)); std::string what_message(se.what()); assert(what_message.find(what_arg) != std::string::npos); assert(what_message.find("Is a directory") != std::string::npos); } { std::string what_arg("io test message"); std::ios_base::failure se(what_arg); assert(se.code() == std::make_error_code(std::io_errc::stream)); std::string what_message(se.what()); assert(what_message.find(what_arg) != std::string::npos); assert(what_message.find(std::iostream_category().message(static_cast<int> (std::io_errc::stream))) != std::string::npos); } }
int main(int, char**) { std::string what_arg("test message"); std::system_error se(make_error_code(std::errc::not_a_directory), what_arg.c_str()); assert(se.code() == std::make_error_code(std::errc::not_a_directory)); std::string what_message(se.what()); assert(what_message.find(what_arg) != std::string::npos); assert(what_message.find("Not a directory") != std::string::npos); return 0; }
categorized_error::categorized_error(const std::error_code &ec, const std::string &what) : categorized_error(ec) { (*this) << what_message(what); }