A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../error/../ranges/zip_view.html below:

std::ranges::views::zip, std::ranges::zip_view - cppreference.com

1) zip_view

is a range adaptor that takes one or more

views

, and produces a

view

whose

i

th element is a tuple-like value consisting of the

ith

elements of all views. The size of produced view is the minimum of sizes of all adapted views.

zip_view always models input_range, and models forward_range, bidirectional_range, random_access_range, or sized_range if all adapted view types model the corresponding concept.

zip_view models common_range if

Customization point objects

The name views::zip denotes a customization point object, which is a const function object of a literal semiregular class type. See CustomizationPointObject for details.

[edit] Data members Member Description std::tuple<Views...> views_ all adapted view objects
(exposition-only member object*) [edit] Member functions constructs a zip_view
(public member function) [edit] returns an iterator to the beginning
(public member function) [edit] returns an iterator or a sentinel to the end
(public member function) [edit] returns the number of elements, provided only if each underlying (adapted) range satisfies sized_range
(public member function) [edit] Inherited from std::ranges::view_interface returns whether the derived view is empty, provided only if it satisfies sized_range or forward_range
(public member function of std::ranges::view_interface<D>) [edit] returns a constant iterator to the beginning of the range
(public member function of std::ranges::view_interface<D>) [edit] returns a sentinel for the constant iterator of the range
(public member function of std::ranges::view_interface<D>) [edit] returns whether the derived view is not empty, provided only if ranges::empty is applicable to it
(public member function of std::ranges::view_interface<D>) [edit] returns the first element in the derived view, provided if it satisfies forward_range
(public member function of std::ranges::view_interface<D>) [edit] returns the last element in the derived view, provided only if it satisfies bidirectional_range and common_range
(public member function of std::ranges::view_interface<D>) [edit] returns the nth element in the derived view, provided only if it satisfies random_access_range
(public member function of std::ranges::view_interface<D>) [edit] [edit] Deduction guides [edit] Nested classes the iterator type
(exposition-only member class template*) the sentinel type used when zip_view is not a common_range
(exposition-only member class template*) [edit] Helper templates (since C++23)

This specialization of ranges::enable_borrowed_range makes zip_view satisfy borrowed_range when each underlying view satisfies it.

[edit] Notes [edit] Example
#include <array>
#include <iostream>
#include <list>
#include <ranges>
#include <string>
#include <tuple>
#include <vector>
 
void print(auto const rem, auto const& range)
{
    for (std::cout << rem; auto const& elem : range)
        std::cout << elem << ' ';
    std::cout << '\n';
}
 
int main()
{
    auto x = std::vector{1, 2, 3, 4};
    auto y = std::list<std::string>{"α", "β", "γ", "δ", "ε"};
    auto z = std::array{'A', 'B', 'C', 'D', 'E', 'F'};
 
    print("Source views:", "");
    print("x: ", x);
    print("y: ", y);
    print("z: ", z);
 
    print("\nzip(x,y,z):", "");
 
    for (std::tuple<int&, std::string&, char&> elem : std::views::zip(x, y, z))
    {
        std::cout << std::get<0>(elem) << ' '
                  << std::get<1>(elem) << ' '
                  << std::get<2>(elem) << '\n';
 
        std::get<char&>(elem) += ('a' - 'A'); // modifies the element of z
    }
 
    print("\nAfter modification, z: ", z);
}

Output:

Source views:
x: 1 2 3 4
y: α β γ δ ε
z: A B C D E F
 
zip(x,y,z):
1 α A
2 β B
3 γ C
4 δ D
 
After modification, z: a b c d E F
[edit] See also

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4