# std::ranges::cartesian_product_view<First, Vs...>::cartesian_product_view

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< cpp‎ | ranges‎ | cartesian product view

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

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)

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