std::generic_category
From cppreference.com
| Defined in header
<system_error>
|
||
| const std::error_category& generic_category();
|
(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_category::name() to return a pointer to the string "generic". It is used to identify error conditions that correspond to the POSIX errno codes.
Contents |
[edit] Parameters
(none)
[edit] Return value
A reference to the static object of unspecified runtime type, derived from std::error_category.
[edit] Exceptions
noexcept specification:
noexcept
[edit] Example
Run this code
#include <iostream> #include <system_error> #include <cerrno> #include <string> int main() { std::error_condition econd = std::generic_category().default_error_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
[edit] See also
| (C++11)
|
identifies the operating system error category (function) |
| (C++11)
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the std::error_condition enumeration listing all standard <cerrno> macro constants (class) |