std::ranges::chunk_view<V>::outer-iterator

 

C++

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Feature test macros(C++20)

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Concepts library(C++20)

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Metaprogramming library(C++11)

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Ranges library(C++20)

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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)

Views
view_interface	subrange

Range factories
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

 

std::ranges::chunk_view

Member functions
chunk_view::chunk_view
chunk_view::base
chunk_view::begin
chunk_view::end
chunk_view::size
chunk_view::reserve_hint (C++26)
Classes for input_ranges Deduction guides outer-iterator chunk_view::outer-iterator::outer-iterator chunk_view::outer-iterator::operator= chunk_view::outer-iterator::operator* chunk_view::outer-iterator::operator++ chunk_view::outer-iterator::operator++(int) operator==(chunk_view::outer-iterator) operator-(chunk_view::outer-iterator) outer-iterator::value_type chunk_view::outer-iterator::value_type::value_type   chunk_view::outer-iterator::value_type::begin chunk_view::outer-iterator::value_type::end chunk_view::outer-iterator::value_type::size inner-iterator chunk_view::inner-iterator::inner-iterator chunk_view::inner-iterator::operator= chunk_view::inner-iterator::base chunk_view::inner-iterator::operator* chunk_view::inner-iterator::operator++ chunk_view::inner-iterator::operator++(int) operator==(chunk_view::inner-iterator) operator-(chunk_view::inner-iterator) iter_move(chunk_view::inner-iterator) iter_swap(chunk_view::inner-iterator)	Class template for forward_ranges iterator chunk_view::iterator::iterator chunk_view::iterator::base chunk_view::iterator::operator* chunk_view::iterator::operator[] 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-= operator==(chunk_view::iterator) operator<(chunk_view::iterator) operator>(chunk_view::iterator) operator<=(chunk_view::iterator) operator>=(chunk_view::iterator) operator<=>(chunk_view::iterator) operator+(chunk_view::iterator) operator-(chunk_view::iterator)

 

class/*outer-iterator*/		(since C++23) (exposition only*)

The return type of chunk_view::begin if V models input_range.

Member types

Member type	Definition
iterator_concept	std::input_iterator_tag
difference_type	ranges::range_difference_t<V>

Data members

Member object	Definition
parent_(private)	A pointer to the "parent object" of type ranges::chunk_view* (exposition-only member object*)

Member functions

(constructor) (C++23)	constructs an iterator (public member function)
operator= (C++23)	move assigns another iterator (public member function)
operator* (C++23)	accesses the element (public member function)
operator++ (C++23)	increments the iterator (public member function)

Non-member functions

operator== (C++23)	compares the iterator with default sentinel (function)
operator- (C++23)	calculates the number of chunks remaining (function)

Nested classes

value_type (C++23)

the value type of /*output-iterator*/ (public member class)

Example

Run this code

#include <iostream>#include <iterator>#include <ranges>#include <sstream>   int main(){conststd::string source{"ABCDEFGHIJ"};   auto letters =std::istringstream{source};auto chunks = std::ranges::istream_view<char>(letters)| std::views::chunk(4);   for(auto outer_iter = chunks.begin(); outer_iter !=std::default_sentinel;++outer_iter){auto chunk =*outer_iter;// chunk is an object of type// chunk_view::outer_iterator::value_typestd::cout<<'[';for(auto inner_iter = chunk.begin(); inner_iter !=std::default_sentinel;++inner_iter)std::cout<<*inner_iter;std::cout<<"] ";}std::cout<<'\n';   // The same output using range-for loopsauto letters2 =std::istringstream{source};auto chunks2 = std::ranges::istream_view<char>(letters2)| std::views::chunk(4);for(auto chunk : chunks2){std::cout<<'[';for(auto ch : chunk)std::cout<< ch;std::cout<<"] ";}std::cout<<'\n';}

Output:

[ABCD] [EFGH] [IJ] [ABCD] [EFGH] [IJ]

References

• C++23 standard (ISO/IEC 14882:2024):

• 26.7.28.3 Class chunk_view::outer-iterator [range.chunk.outer.iter]