NAME¶

std::ranges::cartesian_product_view::cartesian_product_view - std::ranges::cartesian_product_view::cartesian_product_view

Synopsis¶

constexpr cartesian_product_view() = default; (1) (since C++23)
constexpr explicit cartesian_product_view( First first_base, Vs... (2) (since C++23)
bases );

Constructs an cartesian_product_view.

1) Default constructor. Default-initializes the underlying data member base_.
2) Move constructs the underlying base_ by initializing it with
std::move(first_base), std::move(bases)....

Parameters¶

first_base - the first view object to adapt
bases - the pack of views objects to adapt

Example¶

// Run this code

#include <array>
#include <format>
#include <iostream>
#include <ranges>
#include <vector>

int main()
{
auto x = std::array{'A', 'B'};
auto y = std::vector{1, 2, 3};
auto z = std::vector{-1, -2, -3};

auto v = std::ranges::cartesian_product_view(x, y, z); // overload (2)

for (int i{1}; auto const& [rx, ry, rz] : v)
std::cout << std::format("({} {} {}){}", rx, ry, rz, (i++ % 3) ? ' ' : '\n');
}

Output:¶

(A 1 -1) (A 1 -2) (A 1 -3)
(A 2 -1) (A 2 -2) (A 2 -3)
(A 3 -1) (A 3 -2) (A 3 -3)
(B 1 -1) (B 1 -2) (B 1 -3)
(B 2 -1) (B 2 -2) (B 2 -3)
(B 3 -1) (B 3 -2) (B 3 -3)