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std::generic_category(3) C++ Standard Libary std::generic_category(3) NAME std::generic_category - std::generic_category Synopsis Defined in header <system_error> const std::error_category& generic_category() noexcept; (since C++11) Obtains a reference to the static error category object for generic errors. The object is required to override the virtual function error_cate- gory::name() to return a pointer to the string "generic". It is used to identify error con- ditions that correspond to the POSIX errno codes. Parameters (none) Return value A reference to the static object of unspecified runtime type, de- rived from std::error_category. Example // Run this code #include <iostream> #include <system_error> #include <cerrno> #include <string> int main() { std::error_condition econd = std::generic_category().default_er- ror_condition(EDOM); std::cout << "Category: " << econd.category().name() << '\n' << "Value: " << econd.value() << '\n' << "Message: " << econd.message() << '\n'; } Output: Category: generic Value: 33 Message: Numerical argument out of domain See also system_category identifies the operating system error category (C++11) (function) errc the std::error_condition enumeration listing all standard <cerrno> (C++11) macro constants (class) http://cppreference.com 2022.07.31 std::generic_category(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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