NAME¶

std::ranges::common_view::base - std::ranges::common_view::base

Synopsis¶

constexpr V base() const& requires std::copy_constructible<V>; (1) (since C++20)
constexpr V base() &&; (2) (since C++20)

Returns a copy of the underlying view.

1) Copy constructs the result from the underlying view.
2) Move constructs the result from the underlying view.

Parameters¶

(none)

Return value¶

A copy of the underlying view.

Example¶

// Run this code

#include <iostream>
#include <ranges>
#include <string>

int main()
{
std::string str { "C++20" };
auto view = std::views::common(str);

std::string copy_of_str = view.base();
std::cout << "copy of str: [" << copy_of_str << "]\n";
std::cout << "view.base(): [" << view.base() << "]\n";

std::string move_str = std::move(view.base());
std::cout << "moved str: [" << move_str << "]\n";
std::cout << "view.base(): [" << view.base() << "]\n"; // unspecified
}

Possible output:¶

copy of str: [C++20]
view.base(): [C++20]
moved str: [C++20]
view.base(): []