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

From cppreference.com
< cpp‎ | ranges‎ | zip view‎ | iterator
 
 
Ranges library
Range adaptors
 
 
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.

Contents

[edit] Parameters

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

[edit] 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

[edit] Example

[edit] See also

advances or decrements the underlying iterators
(public member function) [edit]