NAME¶

std::ranges::elements_view::elements_view - std::ranges::elements_view::elements_view

Synopsis¶

elements_view() requires std::default_initializable<V> = default; (1) (since C++20)
constexpr explicit elements_view( V base ); (2) (since C++20)

Constructs an elements_view.

1) Default constructor. Value-initializes the underlying view. After construction,
base() returns a copy of V().
2) Initializes the underlying view with std::move(base).

Parameters¶

base - the underlying view

Example¶

// Run this code

#include <array>
#include <iostream>
#include <ranges>
#include <tuple>

void println(auto const& v)
{
for (auto const& e : v)
std::cout << e << ' ';
std::cout << '\n';
}

int main()
{
using namespace std::literals;

const std::array<std::tuple<int, char, std::string>, 2> vt
{
std::tuple{1, 'A', "α"s},
std::tuple{2, 'B', "β"s},
};

[[maybe_unused]]
auto empty = std::views::elements<0>;

println(std::views::elements<0>(vt));
println(std::views::elements<1>(vt));
println(std::views::elements<2>(vt));
}

Output:¶

1 2
A B
α β