is_error_condition_enum Class
Represents a type predicate that tests for the error_condition enumeration.
Syntax
template <_Enum>
class is_error_condition_enum;
Remarks
An instance of this type predicate holds true if the type _Enum is an enumeration value suitable for storing in an object of type error_condition.
It is permissible to add specializations to this type for user-defined types.