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

std::ranges::chunk_by_view:: next

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

Return value

An iterator to the next chunk, as described above.

std::ranges::chunk_by_view:: prev

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

Return value

An iterator to the previous chunk, as described above.