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| // error_code observers: value, category and message #include <iostream> // std::cout, std::ios #include <system_error> // std::system_error #include <fstream> // std::ifstream #include <string> // std::string int main() { std::ifstream is; is.exceptions (std::ios::failbit); try { is.open ("unexistent.txt"); } catch (const std::system_error& e) { std::cout << "Exception caught (system_error):\n"; std::cout << "Error: " << e.what() << '\n'; std::cout << "Code: " << e.code().value() << '\n'; std::cout << "Category: " << e.code().category().name() << '\n'; std::cout << "Message: " << e.code().message() << '\n'; } return 0; }
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