std::ranges::chunk_view<V>::size

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

Ranges library

Range access
begin cbegin end cend	rbegin crbegin rend crend	size ssize data cdata	empty
Range conversions
to (C++23)
Range primitives
range_size_trange_difference_t range_value_t	range_reference_trange_const_reference_trange_rvalue_reference_t   (C++23)	iterator_tconst_iterator_tsentinel_t (C++23)
Dangling iterator handling
dangling	borrowed_iterator_t	borrowed_subrange_t
Range concepts
range borrowed_range    sized_range constant_range (C++23)	common_range view viewable_range	input_range output_range forward_range	bidirectional_range random_access_range contiguous_range
Views
view_interface	subrange
Factories
empty_viewviews::empty iota_viewviews::iota	single_viewviews::single cartesian_product_viewviews::cartesian_product (C++23)(C++23)	basic_istream_viewviews::istream repeat_viewviews::repeat (C++23)(C++23)
Adaptors
ref_view views::all_tviews::all common_viewviews::common reverse_viewviews::reverse as_const_viewviews::as_const (C++23)(C++23) as_rvalue_viewviews::as_rvalue (C++23)(C++23)   zip_viewviews::zip (C++23)(C++23) zip_transform_viewviews::zip_transform (C++23)(C++23)	owning_view take_viewviews::take take_while_viewviews::take_while drop_viewviews::drop drop_while_viewviews::drop_while 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)	views::counted elements_viewviews::elements keys_viewviews::keys values_viewviews::values transform_viewviews::transform chunk_viewviews::chunk (C++23)(C++23) chunk_by_viewviews::chunk_by (C++23)(C++23) slide_viewviews::slide (C++23)(C++23)	filter_viewviews::filter split_viewviews::split lazy_split_viewviews::lazy_split join_viewviews::join join_with_viewviews::join_with (C++23)(C++23) enumerate_viewviews::enumerate (C++23)(C++23) stride_viewviews::stride (C++23)(C++23)
Range generators
std::generator (C++23)
Range adaptor objects
Range adaptor closure objects
Helper items
movable-box	non-propagating-cache	simple-view

 

std::ranges::chunk_view

Member functions

chunk_view::chunk_view (C++23)

chunk_view::base (C++23)

chunk_view::begin (C++23)

chunk_view::end (C++23)

chunk_view::size (C++23)

For input_ranges only

Deduction guides

outer_iterator

chunk_view::outer_iterator::outer_iterator (C++23)

chunk_view::outer_iterator::operator= (C++23)

chunk_view::outer_iterator::operator* (C++23)

chunk_view::outer_iterator::operator++ chunk_view::outer_iterator::operator++(int) (C++23)(C++23)

operator==(chunk_view::outer_iterator) (C++23)

operator-(chunk_view::outer_iterator) (C++23)

outer_iterator::value_type

chunk_view::outer_iterator::value_type::value_type (C++23)

chunk_view::outer_iterator::value_type::begin (C++23)

chunk_view::outer_iterator::value_type::end (C++23)

chunk_view::outer_iterator::value_type::size (C++23)

inner_iterator

chunk_view::inner_iterator::inner_iterator (C++23)

chunk_view::inner_iterator::operator= (C++23)

chunk_view::inner_iterator::operator* (C++23)

chunk_view::inner_iterator::operator++ chunk_view::inner_iterator::operator++(int) (C++23)(C++23)

operator==(chunk_view::inner_iterator) (C++23)

operator-(chunk_view::inner_iterator) (C++23)

For forward_ranges

iterator

chunk_view::iterator::iterator (C++23)

chunk_view::iterator::operator* (C++23)

chunk_view::iterator::operator[] (C++23)

chunk_view::iterator::operator++ chunk_view::iterator::operator++(int) chunk_view::iterator::operator-- chunk_view::iterator::operator--(int) chunk_view::iterator::operator+= chunk_view::iterator::operator-= (C++23)(C++23)(C++23)(C++23)(C++23)(C++23)

operator==(chunk_view::iterator) operator<(chunk_view::iterator) operator>(chunk_view::iterator) operator<=(chunk_view::iterator) operator>=(chunk_view::iterator) operator<=>(chunk_view::iterator) (C++23)(C++23)(C++23)(C++23)(C++23)(C++23)

operator+(chunk_view::iterator) operator-(chunk_view::iterator) (C++23)(C++23)

 

constexpr auto size() requires ranges::sized_range<V>;	(1)	(since C++23)
constexpr auto size() const requires ranges::sized_range<const V>;	(2)	(since C++23)

Returns the number of elements, which is the the smallest integer value that is not less than the quotient of dividing the size of underlying view base_ by the underlying data member n_, that holds the number passed to the constructor (​0​ if default constructed). Equivalent to

return __to_unsigned_like(__div_ceil(ranges::distance(base_), n_));

Parameters

(none)

Return value

The number of elements.

Example

Run this code

// https://godbolt.org/z/Ye7M7arv7
#include <ranges>
 
int main()
{
    constexpr static auto v = {1, 2, 3, 4, 5};
    constexpr auto w{ std::ranges::chunk_view(v, 2) };
    static_assert(w.size() == (5 / 2 + (5 % 2 == 0 ? 0 : 1)));
}

See also

ranges::size (C++20)	returns an integer equal to the size of a range (customization point object)
ranges::ssize (C++20)	returns a signed integer equal to the size of a range (customization point object)