operator==,!=,<,<=>(std::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_code s (function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/error/error_condition/operator_cmp