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

friend constexpr /*iterator*/ operator+( const /*iterator*/& i,
                                         difference_type pos )
    requires ranges::random_access_range<Base>;
 (1) (since C++23) 
friend constexpr /*iterator*/ operator+( difference_type pos,
                                         const /*iterator*/& i )
    requires ranges::random_access_range<Base>;
 (2) (since C++23) 
friend constexpr /*iterator*/ operator-( const /*iterator*/& i,
                                         difference_type pos )
    requires ranges::random_access_range<Base>;
 (3) (since C++23) 
friend constexpr difference_type operator-( const /*iterator*/& i,
                                            const /*iterator*/& j )
    requires std::sized_sentinel_for<ranges::iterator_t<Base>,
                                     ranges::iterator_t<Base>>;
 (4) (since C++23) 
friend constexpr difference_type operator-( std::default_sentinel_t,
                                            const /*iterator*/& i )
    requires std::sized_sentinel_for<ranges::sentinel_t<Base>,
                                     ranges::iterator_t<Base>>;
 (5) (since C++23) 
friend constexpr difference_type operator-( const /*iterator*/& i,
                                            std::default_sentinel_t )
    requires std::sized_sentinel_for<ranges::sentinel_t<Base>,
                                     ranges::iterator_t<Base>>;
 (6) (since C++23)

Performs iterator arithmetic or calculates the distance.

Let current_, end_, n_, and missing_ be the underlying data members.

Equivalent to:

1,2) auto r = i; r += pos; return r;.
3) auto r = i; r -= pos; return r;.
4) return (i.current_ - j.current_ + i.missing_ - j.missing_) / i.n_;.
5) return /*div-ceil*/(i.end_ - i.current_, i.n_);.
6) return -(y - x);.

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

Parameters

i, j - the iterators
pos - the position relative to current location

Return value

1,2) An incremented iterator.
3) A decremented iterator.
4) A distance (in number of elements, i.e. chunks) between given iterators.
5,6) A distance (in number of elements) between given iterator and sentinel.

Example

See also

(C++23)
advances or decrements the underlying iterator
(public member function)

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