std::operator==,!=,<,<=>(std::error_code)
From cppreference.com
< cpp | error | error code
C++
Utilities library
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Diagnostics library
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std::error_code
Member functions | ||||
Modifiers | ||||
Observers | ||||
Non-member functions | ||||
operator==operator!=operator<operator<=>
(until C++20)
(until C++20)
(C++20)
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Helper classes | ||||
Defined in header <system_error>
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bool operator==
(
const
std::error_code
& lhs,
const std::error_code & rhs ) noexcept ; |
(1) | (since C++11) |
bool operator!
=
(
const
std::error_code
& lhs,
const std::error_code & rhs ) noexcept ; |
(2) | (since C++11) (until C++20) |
bool operator<
(
const
std::error_code
& lhs,
const std::error_code & rhs ) noexcept ; |
(3) | (since C++11) (until C++20) |
std::strong_ordering operator<=>
(
const
std::error_code
& lhs,
const std::error_code & rhs ) noexcept ; |
(4) | (since C++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 |
(since C++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) |
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obtains the value of the error_code (public member function) |
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(removed in C++20)
(removed in C++20)
(C++20)
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compares error_condition s and error_code s (function) |