22 Diagnostics library [diagnostics]

22.5 System error support [syserr]

22.5.4 Class error_­condition [syserr.errcondition] Class error_­condition modifiers [syserr.errcondition.modifiers]

void assign(int val, const error_category& cat) noexcept;

Postconditions: val_­ == val and cat_­ == &cat.

template <class ErrorConditionEnum> error_condition& operator=(ErrorConditionEnum e) noexcept;

Postconditions: *this == make_­error_­condition(e).

Returns: *this.

Remarks: This operator shall not participate in overload resolution unless
is_­error_­condition_­enum_­v<ErrorConditionEnum> is true.

void clear() noexcept;

Postconditions: value() == 0 and category() == generic_­category().