- Returns
- A reference to an object of a type derived from class
error_category
.
- Note
- The object's
equivalent
virtual functions shall behave as specified for class error_category
. The object's name
virtual function shall return a pointer to the string "system"
. The object's default_error_condition
virtual function shall behave as follows:
If the argument ev
corresponds to a POSIX errno
value posv
, the function shall return error_condition(ev,generic_category())
. Otherwise, the function shall return error_condition(ev,system_category())
. What constitutes correspondence for any given operating system is unspecified.