23 Iterators library [iterators]

23.5 Iterator adaptors [predef.iterators]

23.5.1 Reverse iterators [reverse.iterators]

23.5.1.7 Comparisons [reverse.iter.cmp]

template<class Iterator1, class Iterator2> constexpr bool operator==( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() == y.base() is well-formed and convertible to bool.
Returns: x.base() == y.base().
template<class Iterator1, class Iterator2> constexpr bool operator!=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() != y.base() is well-formed and convertible to bool.
Returns: x.base() != y.base().
template<class Iterator1, class Iterator2> constexpr bool operator<( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() > y.base() is well-formed and convertible to bool.
Returns: x.base() > y.base().
template<class Iterator1, class Iterator2> constexpr bool operator>( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() < y.base() is well-formed and convertible to bool.
Returns: x.base() < y.base().
template<class Iterator1, class Iterator2> constexpr bool operator<=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() >= y.base() is well-formed and convertible to bool.
Returns: x.base() >= y.base().
template<class Iterator1, class Iterator2> constexpr bool operator>=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Constraints: x.base() <= y.base() is well-formed and convertible to bool.
Returns: x.base() <= y.base().
template<class Iterator1, three_way_comparable_with<Iterator1, weak_equality> Iterator2> constexpr compare_three_way_result_t<Iterator1, Iterator2> operator<=>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: y.base() <=> x.base().
Note
:
The argument order in the Returns: element is reversed because this is a reverse iterator.
— end note
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