class /*inner-iterator*/ | (since C++23) |
The return type of chunk_view::outer-iterator::value_type::begin if V models input_range.
The name of this class (shown here as /*inner-iterator*/) is unspecified.
Typical implementations of /*inner-iterator*/ hold only one non-static data member – a pointer parent_ (the name is for exposition purposes only) to the "parent object" of type ranges::chunk_view*.
| Member type | Definition |
|---|---|
iterator_concept | std::input_iterator_tag |
difference_type | ranges::range_difference_t<V> |
value_type | ranges::range_value_t<V> |
|
(C++23) | constructs an iterator (public member function) |
|
(C++23) | move assigns another iterator (public member function) |
|
(C++23) | returns an iterator to the current element (public member function) |
|
(C++23) | accesses the element (public member function) |
|
(C++23) | increments the iterator (public member function) |
|
(C++23) | compares the iterator with default sentinel (function) |
|
(C++23) | calculates the remained number of elements (function) |
|
(C++23) | casts the result of dereferencing the underlying iterator to its associated rvalue reference type (function) |
|
(C++23) | swaps the objects pointed to by two underlying iterators (function) |
A link to Compiler Explorer.
#include <iostream>
#include <iterator>
#include <sstream>
#include <ranges>
int main()
{
auto letters = std::istringstream{"ABCDEFGHIJK"};
auto chunks = std::ranges::istream_view<char>(letters)
| std::views::chunk(4);
for (auto chunk : chunks)
{
// chunk is an object of type chunk_view::outer_iterator::value_type
std::cout << '[';
for (auto inner_iter = chunk.begin(); inner_iter != std::default_sentinel;
++inner_iter)
std::cout << *inner_iter;
std::cout << "] ";
}
std::cout << '\n';
}Output:
[ABCD] [EFGH] [IJK]
chunk_view::inner-iterator [range.chunk.inner.iter]
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