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std::ranges::chunk_by_view<V,Pred>::find_next, std::ranges::chunk_by_view<V,Pred>::find_prev

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Ranges library
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(C++23)

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(until C++23)(C++23)


 
 

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std::ranges::chunk_by_view::next

constexpr ranges::iterator_t<V>
    /*find-next*/( ranges::iterator_t<V> current );
(since C++23)
(exposition only*)

Finds the next chunk.

Let base_ and pred_ be appropriate underlying data-members of chunk_by_view.

Equivalent to

return ranges::next
(
    ranges::adjacent_find
    (
        current, ranges::end(base_), std::not_fn(std::ref(*pred_))
    ),
    1, ranges::end(base_)
);


The behavior is undefined if pred_.has_value() is false before the call to this function.


Used in the following non-static member functions:

Parameters

current - the iterator to current element in adapted view

std::ranges::chunk_by_view::prev

constexpr iterator_t<V>

    /*find-prev*/( ranges::iterator_t<V> current )

        requires ranges::bidirectional_range<V>;
(since C++23)
(exposition only*)

Finds the previous chunk.

Let base_ and pred_ be appropriate underlying data-members of chunk_by_view.

Returns an iterator i in the range [ranges::begin(base_)current) such that:


The behavior is undefined if before the call to this function current == ranges::begin(base_) or pred_.has_value() != true.


Used in the following non-static member functions:

Parameters

current - the iterator to current element in adapted view.