std::ranges::chunk_by_view<V,Pred>::begin

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Ranges library

Range access

begin
cbegin
end
cend

rbegin
crbegin
rend
crend

size
ssize
data
cdata

reserve_hint (C++26)
empty

Range conversions
std::from_range_t std::from_range (C++23)(C++23)
to (C++23)

Dangling iterator handling
dangling
borrowed_iterator_t
borrowed_subrange_t

Range primitives

range_size_trange_difference_trange_value_t
elements_of (C++23)

iterator_tconst_iterator_tsentinel_tconst_sentinel_t

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

range_reference_trange_const_reference_trange_rvalue_reference_trange_common_reference_t

(C++23)

Range concepts

range
borrowed_range
common_range

sized_range
viewable_range
view

input_range
output_range
forward_range

bidirectional_range
random_access_range
contiguous_range

approximately_sized_range (C++26)
constant_range (C++23)

empty_viewviews::empty

single_viewviews::single

basic_istream_viewviews::istream

iota_viewviews::iota

repeat_viewviews::repeat

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

Range adaptors

views::all_tviews::all
as_rvalue_viewviews::as_rvalue (C++23)(C++23)
filter_viewviews::filter
transform_viewviews::transform
take_viewviews::take
take_while_viewviews::take_while
common_viewviews::common
views::counted
to_input_viewviews::to_input (C++26)(C++26)

ref_view
drop_viewviews::drop
drop_while_viewviews::drop_while
lazy_split_viewviews::lazy_split
split_viewviews::split
join_viewviews::join
join_with_viewviews::join_with (C++23)(C++23)
concat_viewviews::concat (C++26)(C++26)
cache_latest_viewviews::cache_latest (C++26)(C++26)

owning_view
reverse_viewviews::reverse
as_const_viewviews::as_const (C++23)(C++23)
elements_viewviews::elements
keys_viewviews::keys
values_viewviews::values
enumerate_viewviews::enumerate (C++23)(C++23)
zip_viewviews::zip (C++23)(C++23)
zip_transform_viewviews::zip_transform (C++23)(C++23)

adjacent_viewviews::adjacent (C++23)(C++23)
views::pairwise (C++23)
adjacent_transform_viewviews::adjacent_transform (C++23)(C++23)
views::pairwise_transform (C++23)
chunk_viewviews::chunk (C++23)(C++23)
slide_viewviews::slide (C++23)(C++23)
chunk_by_viewviews::chunk_by (C++23)(C++23)
stride_viewviews::stride (C++23)(C++23)
cartesian_product_viewviews::cartesian_product (C++23)(C++23)

Range generators
std::generator (C++23)

Range adaptor closure objects
range_adaptor_closure (C++23)

Range adaptor objects

Helper items

copyable-box
movable-box

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

simple-view
non-propagating-cache

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std::ranges::chunk_by_view

Member functions
chunk_by_view::chunk_by_view
chunk_by_view::base
chunk_by_view::pred
chunk_by_view::begin
chunk_by_view::end
chunk_by_view::find_next
chunk_by_view::find_prev
Deduction guides
Iterator
chunk_by_view::iterator::iterator
chunk_by_view::iterator::operator*
chunk_by_view::iterator::operator++ chunk_by_view::iterator::operator++(int) chunk_by_view::iterator::operator-- chunk_by_view::iterator::operator--(int)
operator==(chunk_by_view::iterator)

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constexpr/iterator/ begin();		(since C++23)

Returns aniterator to the first element of thechunk_by_view.

Equivalent to:

ranges::iterator_t<V> iter; if(begin_.has_value())    iter= begin_.value();else{    iter=/*find_next*/(ranges::begin(base()));    begin_= iter;// caching} return/*iterator*/(*this,ranges::begin(base()), iter);

The behavior is undefined if the underlying predicatepred_ does not contain a value.

[edit]Parameters

(none)

[edit]Return value

Iterator to the first element.

[edit]Notes

In order to provide the amortized constant-time complexity required by therange concept, this function caches the result within the data memberbegin_ for use on subsequent calls.

[edit]Example

This section is incomplete
Reason: no example

[edit]See also

end	returns an iterator or a sentinel to the end (public member function)[edit]
ranges::begin (C++20)	returns an iterator to the beginning of a range (customization point object)[edit]