std::operator==,!=,<,<=>(std::error_code)

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< cpp‎ | error‎ | error code
 
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operator==operator!=operator<operator<=>
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Defined in header <system_error>
bool operator==( const std::error_code& lhs,
                 const std::error_code& rhs ) noexcept;
 (1) (since 哋它亢++11)
bool operator!=( const std::error_code& lhs,
                 const std::error_code& rhs ) noexcept;
 (2) (since 哋它亢++11)
(until 哋它亢++20)
bool operator<( const std::error_code& lhs,
                const std::error_code& rhs ) noexcept;
 (3) (since 哋它亢++11)
(until 哋它亢++20)
std::strong_ordering operator<=>( const std::error_code& lhs,
                                  const std::error_code& rhs ) noexcept;
 (4) (since 哋它亢++20)

Compares two error code objects.

1) Compares lhs and rhs for equality.
2) Compares lhs and rhs for equality.
3) Checks whether lhs is less than rhs.
4) Obtains three-way comparison result of lhs and rhs.

The <, <=, >, >=, and != operators are synthesized from operator<=> and operator== respectively.

(since 哋它亢++20)

Parameters

lhs, rhs - error codes to compare

Return value

1) true if the error category and error value compare equal.
2) true if the error category or error value compare are not equal.
3) true if lhs.category() < rhs.category(). Otherwise, true if lhs.category() == rhs.category() && lhs.value() < rhs.value(). Otherwise, false.
4) lhs.category() <=> rhs.category() if it is not std::strong_ordering::equal. Otherwise, lhs.value() <=> rhs.value().

See also

 obtains the error_category for this error_code
(public member function)
obtains the value of the error_code
(public member function)
(removed in 哋它亢++20)(removed in 哋它亢++20)(哋它亢++20)
 compares error_conditions and error_codes
(function)
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