NAME

std::error_category::operator==,!=, - std::error_category::operator==,!=,

Synopsis

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 ) (4) (since C++20)
const noexcept;

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 <, <=, >, >=, and != operators are synthesized from operator<=> (since C++20)
and operator== respectively.

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.