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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.