operator==,!=,<,<=>(std::error_condition)
From cppreference.com
< cpp | error | error condition
Defined in header <system_error>
|
||
|
bool operator==
(
const
std::error_condition
& lhs,
const std::error_condition & rhs ) noexcept ; |
(1) | (since C++11) |
|
bool operator!
=
(
const
std::error_condition
& lhs,
const std::error_condition & rhs ) noexcept ; |
(2) | (since C++11) (until C++20) |
|
bool operator<
(
const
std::error_condition
& lhs,
const std::error_condition & rhs ) noexcept ; |
(3) | (since C++11) (until C++20) |
|
std::strong_ordering operator<=>
(
const
std::error_condition
& lhs,
const std::error_condition & rhs ) noexcept ; |
(4) | (since C++20) |
|
bool operator==
(
const
std::error_code
& code,
const std::error_condition & cond ) noexcept ; |
(5) | (since C++11) |
|
bool operator==
(
const
std::error_condition
& cond,
const std::error_code & code ) noexcept ; |
(5) | (since C++11) (until C++20) |
|
bool operator!
=
(
const
std::error_code
& code,
const std::error_condition & cond ) noexcept ; |
(6) | (since C++11) (until C++20) |
|
bool operator!
=
(
const
std::error_condition
& cond,
const std::error_code & code ) noexcept ; |
(6) | (since C++11) (until C++20) |
Compares two error conditions.
1) Checks whether lhs and rhs are equal.
2) Checks whether lhs and rhs are not equal.
3) Checks whether lhs is less than rhs.
4) Obtains three-way comparison result of lhs and rhs.
5) Checks whether code is a semantic match for cond.
6) Checks whether code is not a semantic match for cond.
|
The |
(since C++20) |
Parameters
| lhs, rhs, cond | - | error conditions to compare |
| code | - | the error code 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
(
)
5)
true if either
code.category
(
).equivalent
(code.value
(
), cond)
or
cond.category
(
).equivalent
(code, cond.value
(
)
)
6)
true if neither
code.category
(
).equivalent
(code.value
(
), cond)
nor
cond.category
(
).equivalent
(code, cond.value
(
)
)
See also
|
[virtual]
|
compares error_code and error_condition for equivalence (virtual public member function of std::error_category) |
|
(removed in C++20)
(removed in C++20)
(C++20)
|
compares two error_codes (function) |