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std::ranges::slide_view<V>::iterator<Const>::operator++,--,+=,-=

constexpr /iterator/& operator++();	(1)	(since C++23)
constexpr /iterator/ operator++( int );	(2)	(since C++23)
constexpr /iterator/& operator--() requires ranges::bidirectional_range<Base>;	(3)	(since C++23)
constexpr /iterator/ operator--( int ) requires ranges::bidirectional_range<Base>;	(4)	(since C++23)
constexpr /iterator/& operator+=( difference_type n ) requires ranges::random_access_range<Base>;	(5)	(since C++23)
constexpr /iterator/& operator-=( difference_type n ) requires ranges::random_access_range<Base>;	(6)	(since C++23)

Advances or decrements the iterator.

Let current_ and last_ele_ be the underlying iterators to the begin and end of the sliding window.

1) Equivalent to:

current_ = ranges::next(current_);
last_ele_ = ranges::next(last_ele_); // if last_ele_ is present
return *this;

Before the invocation, the current_ and last_ele_ (if present) must be incrementable.

2) Equivalent to: auto tmp = *this; ++*this; return tmp;

3) Equivalent to:

current_ = ranges::prev(current_);
last_ele_ = ranges::prev(last_ele_); // if last_ele_ is present
return *this;

Before the invocation, the current_ and last_ele_ (if present) must be decrementable.

4) Equivalent to: auto tmp = *this; --*this; return tmp;

5) Equivalent to:

current_ = current_ + n;
last_ele_ = last_ele_ + n; // if last_ele_ is present
return *this;

Before the invocation, the expressions current_ + n and last_ele_ + n (if last_ele_ is present) must have well-defined behavior.

6) Equivalent to:

current_ = current_ - n;
last_ele_ = last_ele_ - n; // if last_ele_ is present
return *this;

Before the invocation, the expressions current_ - n and last_ele_ - n (if last_ele_ is present) must have well-defined behavior.

position relative to current location

1,3,5,6) *this

2,4) a copy of *this that was made before the change