std::ranges::chunk_view<V>::outer-iterator
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< cpp | ranges | chunk view
class /*outer-iterator*/ |
(since C++23) (exposition only*) |
|
The return type of chunk_view::begin
if V
models input_range
.
Contents |
[edit] Member types
Member type | Definition |
iterator_concept
|
std::input_iterator_tag |
difference_type
|
ranges::range_difference_t<V> |
[edit] Data members
Member object | Definition |
parent_ (private)
|
A pointer to the "parent object" of type ranges::chunk_view* (exposition-only member object*) |
[edit] Member functions
(C++23) |
constructs an iterator (public member function) |
(C++23) |
move assigns another iterator (public member function) |
(C++23) |
accesses the element (public member function) |
(C++23) |
increments the iterator (public member function) |
[edit] Non-member functions
(C++23) |
compares the iterator with default sentinel (function) |
(C++23) |
calculates the number of chunks remaining (function) |
[edit] Nested classes
(C++23) |
the value type of /*output-iterator*/ (public member class) |
[edit] Example
Run this code
#include <iostream> #include <iterator> #include <ranges> #include <sstream> int main() { const std::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_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'; // The same output using range-for loops auto 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]
[edit] References
- C++23 standard (ISO/IEC 14882:2024):
- 26.7.28.3 Class chunk_view::outer-iterator [range.chunk.outer.iter]