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

std::ranges::chunk_by_view::next

constexpr ranges::iterator_t<V>
    /*find-next*/( ranges::iterator_t<V> current );

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:

• ranges::chunk_by_view::iterator::operator++

Parameters

std::ranges::chunk_by_view::prev

constexpr iterator_t<V>
    /*find-prev*/( ranges::iterator_t<V> current )
        requires ranges::bidirectional_range<V>;

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:

• ranges::adjacent_find(i, current, std::not_fn(std::ref(*pred_))) is equal to current, and
• if i is not equal to ranges::begin(base_), then bool(std::invoke(*pred_, *ranges::prev(i), *i)) is false.

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:

• ranges::chunk_by_view::iterator::operator--

Parameters