<system_error> operators

The latest version of this topic can be found at <system_error> operators.

operator==

Tests if the object on the left side of the operator is equal to the object on the right side.

bool operator==(const error_code& left,
    const error_condition& right);

bool operator==(const error_condition& left,
    const error_code& right);

Parameters

Return Value

true if the objects are equal; false if objects are not equal.

Remarks

This function returns left.category() == right.category() && left.value() == right.value().

operator!=

Tests if the object on the left side of the operator is not equal to the object on the right side.

bool operator!=(const error_code& left,
    const error_condition& right);

bool operator!=(const error_condition& left,
    const error_code& right);

Parameters

Return Value

true if the object passed in left is not equal to the object passed in right; otherwise false.

Remarks

This function returns !(left == right).

operator<

Tests if an object is less than the object passed in for comparison.

template <class _Enum>  
inline bool operator<(
    _Enum left,
    typename enable_if<is_error_code_enum<_Enum>::value,
    const error_code&>::type right);

template <class _Enum>  
inline bool operator<(
    typename enable_if<is_error_code_enum<_Enum>::value,
    const error_code&>::type left, _Enum right);

template <class _Enum>  
inline bool operator<(
    _Enum left,
    typename enable_if<is_error_condition_enum<_Enum>::value,
    const error_condition&>::type right);

template <class _Enum>  
inline bool operator<(
    typename enable_if<is_error_condition_enum<_Enum>::value,
    const error_condition&>::type left, _Enum right);

Parameters

Return Value

true if the object passed in left is less than the object passed in right; Otherwise, false.

Remarks

This function tests the error order.

See Also

<system_error>