std::error_category::operator==,!=,<,<=>
bool operator==( const error_category& rhs ) const noexcept; |
(1) | (since C++11) |
bool operator!=( const error_category& rhs ) const noexcept; |
(2) | (since C++11) (until C++20) |
bool operator<( const error_category& rhs ) const noexcept; |
(3) | (since C++11) (until C++20) |
std::strong_ordering operator<=>( const error_category& rhs ) const noexcept; |
(4) | (since C++20) |
Compares to another error category.
1) Checks whether
*this
and
rhs
refer to the same object.
2) Checks whether
*this
and
rhs
do not refer to the same object.
3) Orders
*this
and
rhs
by the order of
this
and
&rhs
. Equivalent to
std::less<const error_category*>()(this, &rhs)
.
4) Orders
*this
and
rhs
by the order of
this
and
&rhs
. Equivalent to
std::compare_three_way()(this, &rhs)
.
The |
(since C++20) |
Parameters
rhs | - | specifies the error_category to compare |
Return value
1)
true
if
*this
and
rhs
refer to the same object,
false
otherwise.
2)
true
if
*this
and
rhs
do not refer to the same object,
false
otherwise.
3)
true
if
*this
is less than
rhs
as defined by the order of
this
and
&rhs
.
4)
std::strong_order::less
if
*this
is less than
rhs
as defined by the order of
this
and
&rhs
, otherwise
std::strong_order::greater
if
rhs
is less than
*this
in the order, otherwise
std::strong_order::equal
.
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