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operator-(ranges::chunk_view::outer-iterator)

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Ranges library
Range access
Range conversions
(C++23)

Range primitives



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Helper items
(until C++23)(C++23)


 
std::ranges::chunk_view
Member functions
Classes for input_ranges
Deduction guides
outer-iterator
operator-(chunk_view::outer-iterator)
outer-iterator::value_type
inner-iterator
 
friend constexpr difference_type operator-( std::default_sentinel_t s,

                                            const /*outer-iterator*/& i )
    requires ranges::sized_sentinel_for<ranges::sentinel_t<V>,

                                        ranges::iterator_t<V>>;
(1) (since C++23)
friend constexpr difference_type operator-( const /*outer-iterator*/& i,

                                            std::default_sentinel_t s )
    requires ranges::sized_sentinel_for<ranges::sentinel_t<V>,

                                        ranges::iterator_t<V>>;
(2) (since C++23)

Calculates the distance (in number of chunks) between the iterator and sentinel.

Let parent_ be the underlying pointer to enclosing chunk_view.

1) Equivalent to:
const auto dist = ranges::end(i.parent_->base_) - *i.parent_->current_;
if (dist < i.parent_->remainder_)
    return dist == 0 ? 0 : 1;
return /*div-ceil*/(dist - i.parent_->remainder_, i.parent_->n_) + 1;
2) Equivalent to: return -(s - i);.

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

Contents

[edit] Parameters

i - the iterator
s - the sentinel

[edit] Return value

The distance between given iterator and sentinel.

[edit] Example

[edit] See also

increments the iterator
(public member function)