# std::ranges::cartesian_product_view<First, Vs...>::iterator<Const>::operator++,--,+=,-=

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< cpp‎ | ranges‎ | cartesian product view‎ | iterator

constexpr /*iterator*/& operator++(); | (1) | (since C++23)
constexpr void operator++( int ); | (2) | (since C++23)
constexpr /*iterator*/ operator++( int ) requires ranges::forward_range</*maybe-const*/<Const, First>>; | (3) | (since C++23)
constexpr /*iterator*/& operator--() requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>; | (4) | (since C++23)
constexpr /*iterator*/ operator--( int ) requires /*cartesian-product-is-bidirectional*/<Const, First, Vs...>; | (5) | (since C++23)
constexpr /*iterator*/& operator+=( difference_type n ) requires /*cartesian-product-is-random-access*/<Const, First, Vs...>; | (6) | (since C++23)
constexpr /*iterator*/& operator-=( difference_type n ) requires /*cartesian-product-is-random-access*/<Const, First, Vs...>; | (7) | (since C++23)

Increments or decrements the iterator.

Let `current_` denote the underlying tuple of iterators and `parent_` denote the underlying pointer to `cartesian_product_view`.

1) Equivalent to `next`();`` return *this;
2) Equivalent to ++*this;
3) Equivalent to auto tmp = *this; ++*this; return tmp;
4) Equivalent to `prev`();`` return *this;
5) Equivalent to auto tmp = *this; --*this; return tmp;
6) Sets the value of *this to `ret`, where `ret` is:

- if n > 0, the value of *this provided that `next` been called n times. Otherwise,
- if n < 0, the value of *this provided that `prev` been called -n times. Otherwise,
- the value of *this before the call.

The behavior is undefined if n is not in the range `[`ranges::distance(*this, ranges::begin(*parent_))`,` ranges::distance(*this, ranges::end(*parent_))`]`.
7) Equivalent to *this += -n; return *this;.

### Parameters

n | - | position relative to current location

### Return value

1,4,6,7) *this
2) (none)
3,5) a copy of *this that was made before the change.

### Complexity

6) Constant.

### Example

| This section is incomplete Reason: no example

### See also

operator+operator- (C++23) | performs iterator arithmetic (function)

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