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

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< cpp‎ | ranges‎ | elements view‎ | iterator

friend constexpr /*iterator*/ operator+( const /*iterator*/& i, difference_type n ) requires ranges::random_access_range<Base>; | (1) | (since C++20)
friend constexpr /*iterator*/ operator+( difference_type n, const /*iterator*/& i ) requires ranges::random_access_range<Base>; | (2) | (since C++20)
friend constexpr /*iterator*/ operator-( const /*iterator*/& i, difference_type n ) requires ranges::random_access_range<Base>; | (3) | (since C++20)
friend constexpr difference_type operator-( const /*iterator*/& x, const /*iterator*/& y ) requires std::sized_sentinel_for<ranges::iterator_t<Base>, ranges::iterator_t<Base>>; | (4) | (since C++20)

1,2) Returns the iterator `i` incremented by `n`.
3) Returns the iterator `i` decremented by `n`.
4) Returns the distance between `x` and `y`.

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

### Parameters

i, x, y | - | the iterators
n | - | position relative to current location

### Return value

1-2) [&]{ auto j = i; j += n; return j; }()
3) [&]{ auto j = i; j -= n; return j; }()
4) x.base() - y.base()

### Example

| This section is incomplete Reason: no example

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 3483 | C++20 | `elements_view::iterator`'s difference is overconstrained | requirement is relaxed

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