# operator+,-(ranges::zip_view::iterator)

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< cpp‎ | ranges‎ | zip view‎ | iterator

friend constexpr /*iterator*/ operator+( const /*iterator*/& i, difference_type n ) requires /*all-random-access*/<Const, Views...>; | (1) | (since C++23)
friend constexpr /*iterator*/ operator+( difference_type n, const /*iterator*/& i ) requires /*all-random-access*/<Const, Views...>; | (2) | (since C++23)
friend constexpr /*iterator*/ operator-( const /*iterator*/& i, difference_type n ) requires /*all-random-access*/<Const, Views...>; | (3) | (since C++23)
friend constexpr difference_type operator-( const /*iterator*/& i, const /*iterator*/& j ) requires ( std::sized_sentinel_for < ranges::iterator_t </*maybe-const*/<Const, Views>>, ranges::iterator_t </*maybe-const*/<Const, Views>>> and ...); | (4) | (since C++23)

Let `current_` denote the underlying tuple-like object of iterators to elements of adapted views.

1,2) Returns the iterator i incremented by n. Equivalent to: auto r = i; r += n; return r;.
3) Returns the iterator i decremented by n. Equivalent to: auto r = i; r -= n; return r;.
4) Let `DIST(k)` be difference_type(std::get<k>(i.current_) - std::get<k>(j.current_)). Returns the smallest absolute value among `DIST(n)` for all integers 0 <= n < sizeof...(Views).

These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when `zip_view::iterator<Const>` is an associated class of the arguments.

### Parameters

i, j | - | the iterators.
n | - | position relative to current location.

### Return value

1,2) a copy of i that is advanced by n
3) a copy of i that is advanced by -n
4) the distance between i and j

### Example

| This section is incomplete Reason: no example

### See also

operator++operator++(int)operator--operator--(int)operator+=operator-= | advances or decrements the underlying iterators (public member function)

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