std::reverse_iterator<Iter>::operator++,+,+=,--,-,-=

	(1)
reverse_iterator& operator++();		(until C++17)
constexpr reverse_iterator& operator++();		(since C++17)
	(2)
reverse_iterator& operator--();		(until C++17)
constexpr reverse_iterator& operator--();		(since C++17)
	(3)
reverse_iterator operator++( int );		(until C++17)
constexpr reverse_iterator operator++( int );		(since C++17)
	(4)
reverse_iterator operator--( int );		(until C++17)
constexpr reverse_iterator operator--( int );		(since C++17)
	(5)
reverse_iterator operator+( difference_type n ) const;		(until C++17)
constexpr reverse_iterator operator+( difference_type n ) const;		(since C++17)
	(6)
reverse_iterator operator-( difference_type n ) const;		(until C++17)
constexpr reverse_iterator operator-( difference_type n ) const;		(since C++17)
	(7)
reverse_iterator& operator+=( difference_type n );		(until C++17)
constexpr reverse_iterator& operator+=( difference_type n );		(since C++17)
	(8)
reverse_iterator& operator-=( difference_type n );		(until C++17)
constexpr reverse_iterator& operator-=( difference_type n );		(since C++17)

Increments or decrements the iterator. Inverse operations are applied to the underlying operator because of the reverse order.

1-2) Pre-increments or pre-decrements by one respectively.

3-4) Post-increments or post-decrements by one respectively.

5-6) Returns an iterator which is advanced by n or -n positions respectively.

7-8) Advances the iterator by n or -n positions respectively.

1-2) *this

3-4) a copy of *this that was made before the change

5-6) reverse_iterator(base()-n) or reverse_iterator(base()+n) respectively.

7-8) *this