std::error_category::default_error_condition

From cppreference.com
 
 
Utilities library
General utilities
Date and time
Function objects
Formatting library (C++20)
(C++11)
Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)(C++20)(C++20)   
(C++20)
Swap and type operations
(C++14)
(C++11)
(C++11)
(C++11)
(C++17)
Common vocabulary types
(C++11)
(C++17)
(C++17)
(C++17)
(C++11)
(C++17)
(C++23)
Elementary string conversions
(C++17)
(C++17)
 
Diagnostics library
Exception handling
Exception handling failures
(until C++17*)
(until C++17*)
(C++11)(until C++17*)    
(until C++17*)
Error codes
Error codes
 
 
virtual std::error_condition default_error_condition( int code ) const noexcept;
(since C++11)

Returns the error condition for the given error code.

Equivalent to std::error_condition(code, *this).

Classes derived from error_category may override this function to map certain error codes to a generic category. For example, std::system_category overrides this function to map the error codes that match POSIX errno values to std::generic_category.

Parameters

code - error code for which to return error condition

Return value

The error condition for the given error code.